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1
Millar, Gavin Francis. "Aggregation and development of the gorse spider mite Tetranychus lintearius dufour (acari: tetranychidae)". Thesis, University of Canterbury. Zoology, 1993. http://hdl.handle.net/10092/1495.
Testo completoAbstract (sommario):
Gorse, Ulex europaeus, is a serious weed of agriculture and forestry in New Zealand. The mite Tetranychus lintearius feeds on gorse in Europe and was released in New Zealand during autumn 1989 as a potential biological control agent. The aim of my laboratory study was to increase available knowledge on its development and aggregation. As the quality of gorse declined as a food resource (as indicated by chlorophyll content) a significant decline in egg production, and an increase in development time of mites was found. Mean egg production at 15℃ ranged from 37.8 to 45.2 eggs/female over 10 days in the experimental treatments and development time from 39.2 to 43.3 days. Density of adult female mites (1, 2, 5, 10, 15, 20/spine) also had a significant effect on the number of eggs produced/female over ten days (mean daily egg production/female, 0.78-0.88). Mean development time from egg to adult decreased from 40.6 to 39 days as density increased from 1 to 50 mites/spine. The resident New Zealand strain of T lintearius, imported originally from Cornwall, is now widely established but has not established successfully on the west coast of the South Island or in the north of the North Island. Four new strains recently introduced from coastal Portugal and Spain, areas climatically similar to these New Zealand regions, may be more successful. Thus, although egg production and survival of all strains were significantly reduced when subjected to daily periods of simulated rainfall in laboratory experiments, those of the newly introduced strains were least affected. Laboratory experiments with the resident New Zealand and Cambados strains also showed that individuals aggregated actively at 10-20℃, but the latter aggregated more strongly at these temperatures. This strong aggregation behaviour may increase survival in warm, wet climates and suggests that Cambados strain mites could become established and so increase gorse control in Westland and Northland.
2
Anderson, Stuart Alexander James. "Fuel moisture and development of ignition and fire spread thresholds in gorse (Ulex europaeus)". Thesis, University of Canterbury. Forestry, 2009. http://hdl.handle.net/10092/3013.
Testo completoAbstract (sommario):
Shrub fuels are capable of extreme fire behaviour under conditions that are often moderate in other fuels. There is also a narrow range of conditions that determine fire success in these fuels, below which fires may ignite but hardly spread and above which they ignite and develop into fast moving and high intensity fires. This is due to the elevated dead fine fuels that dry rapidly and carry fire. Fire danger rating systems designed for forest and grassland fuels do not predict fire potential in shrub fuels very well. Fire management requires fire danger rating systems to provide accurate and timely information on fire potential for all important fuel types.
Studies of fuel moisture, ignition and fire spread were carried out in the field in gorse (Ulex europaeus L.) shrub fuels to predict the moisture content of the elevated dead fuels and to define the conditions that govern fire development. The accuracy of the Fine Fuel Moisture Code (FFMC) of the Canadian Forest Fire Weather Index (FWI) System to predict moisture content of this layer was assessed. A bookkeeping method to predict moisture content was developed based on semi-physical models of equilibrium moisture content, fuel response time and the FFMC.
The FFMC predicted moisture content poorly, because the FWI System is based on the litter layer of a mature conifer forest. The gorse elevated dead fuel layer is more aerated and dries faster than this conifer forest litter layer. The bookkeeping method was reliable and allowed adjustment of fuel response time based on weather conditions. Difficulties in modelling meteorological conditions under the gorse canopy limited its accuracy. Separate thresholds determined ignition and fire spread success, with both based on the elevated dead fuel moisture content. Options to improve the shrub fire danger rating system were presented based on these findings.
The results are significant because they are based on data collected in the field under real conditions. Validation of these results and extension to other shrub fuels is required before the findings are used to change current models. However, the study has significantly advanced the knowledge of fire behaviour in shrub fuels and will contribute to safe and effective fire management in these fuels.
3
Yamoah, Emmanuel. "A model system using insects to vector Fusarium tumidum for biological control of gorse (Ulex europaeus)". Phd thesis, Lincoln University. Bio-Protection and Ecology Division, 2007. http://theses.lincoln.ac.nz/public/adt-NZLIU20080131.114607/.
Testo completoAbstract (sommario):
The overall objective of this study was to test the hypothesis that insects can vector F.
tumidum conidia to infect gorse plants with the aim of developing an alternative approach to mycoherbicide delivery to control weeds. Four potential insect species (Apion ulicis, Cydia ulicetana, Epiphyas postvittana and Sericothrips staphylinus) were assessed for their ability to vector F. tumidum conidia. To achieve this, the external microflora (bacteria and fungi) and the size and location of fungal spores on the cuticle of these insect species were determined. In addition, the ability of the insects to pick up and deposit F. tumidum conidia on agar was studied. Based on the results from these
experiments, E. postvittana was selected for more detailed experiments to determine transmission of F. tumidum to infect potted gorse plants. The factors promoting pathogenicity of F. tumidum against gorse and the pathogen loading required to infect and kill the weed were also determined.
The external microflora of the four insect species were recovered by washing and plating
techniques and identified by morphology and polymerase chain reaction restriction
fragment length polymorphism (PCR-RFLP) and sequencing of internally transcribed
spacer (ITS) and 16S rDNA. A culture-independent technique (direct PCR) was also used
to assess fungal diversity by direct amplification of ITS sequences from the washings of the insects. All insect species carried Alternaria, Cladosporium, Nectria, Penicillium,
Phoma, Pseudozyma spp. and entomopathogens. Ninety four per cent of the 178 cloned
amplicons had ITS sequences similarity to Nectria mauritiicola. E. postvittana carried the
largest fungal spores (mean surface area of 125.9 ìm2) and the most fungal CFU/insect.
About 70% of the fungi isolated from the insects were also present on the host plant
(gorse) and the understorey grass. The mean size of fungal spores recovered from the
insect species correlated strongly with their body length (R² = 85%). Methylobacterium
aquaticum and Pseudomonas lutea were common on all four insect species.
Pseudomonas fluorescens was the most abundant bacterial species.
In the pathogenicity trials, the effectiveness of F. tumidum in reducing root and shoot
biomass of 16 and 8 wk old gorse plants was significantly increased with wounding of the
plants. Older plants (32 wk old) which were wounded and inoculated were significantly
shorter, more infected and developed more tip dieback (80%) than plants which were not
wounded (32%). This indicates that damage caused by phytophagous insect species
present on gorse through feeding and oviposition may enhance infection by F. tumidum.
Wounding may release nutrients (e.g. Mg and Zn) essential for conidia germination and
germ tube elongation and also provide easier access for germ tube penetration. Conidial
germination and germ tube length were increased by 50 and 877%, respectively when
incubated in 0.2% of gorse extract solution for 24 h compared with incubation in water.
Inoculum suspensions amended with 0.2% of gorse extract caused more infection and
significantly reduced biomass production of 24 wk old gorse plants than suspensions
without gorse extract. A minimum number of about 900 viable conidia/infection site of F.
tumidum were required to infect gorse leaves. However, incorporation of amendments
(which can injure the leaf cuticle) or provision of nutrients (i.e. gorse extract or glucose)
in the formulation might decrease the number of conidia required for lesion formation.
Scanning electron micrographs showed that germ tube penetration of gorse tissue was
limited to open stomata which partly explain the large number of conidia required for
infection. The flowers and leaves were more susceptible to F. tumidum infection than the
spines, stems and pods. An experiment to determine the number of infection sites
required to cause plant mortality showed that the entire plant needs to be inoculated in
order for the pathogen to kill 10 wk old plants as F. tumidum is a non systemic pathogen.
The number of infection sites correlated strongly with disease severity (R² = 99.3%). At
least 50% of the plant was required to be inoculated to cause a significant reduction in
shoot dry weight. F. tumidum, applied as soil inoculant using inoculated wheat grains in three separate experiments, significantly suppressed gorse seedling emergence and biomass production.
In experiments to determine the loading capacity of the insect species, E. postvittana, the
largest insect species studied, carried significantly more (68) and deposited significantly more (29) F. tumidum conidia than the other species. Each E. postvittana, loaded with 5,000 conidia of F. tumidum, transmitted approximately 310 conidia onto gorse plants but
this did not cause any infection or affect plant growth as determined by shoot fresh
weight and shoot height. E. postvittana on its own did not cause any significant damage
to gorse and did not enhance F. tumidum infection. It also failed to spread the pathogen
from infected plants to the healthy ones. There was no evidence of synergism between the
two agents and damage caused by the combination of both E. postvittana and F. tumidum
was equivalent to that caused by F. tumidum alone.
This study has shown that E. postvittana has the greatest capacity to vector F. tumidum
since it naturally carried the largest and the most fungal spores (429 CFU/insect).
Moreover, it naturally carried Fusarium spp. such as F. lateritium, F. tricinctum and
Gibberella pulicaris (anamorph Fusarium sambucinum) and was capable of carrying and
depositing most F. tumidum conidia on agar. Coupled with the availability of pheromone
for attracting the male insects, E. postvittana may be a suitable insect vector for
delivering F. tumidum conidia on gorse using this novel biocontrol strategy. Although it
is a polyphagous insect, and may visit non-target plants, F. tumidum is a very specific
pathogen of gorse, broom and a few closely related plant species. Hence, using this insect
species to vector F. tumidum in a biological control programme, should not pose a
significant threat to plants of economic importance. However, successful control of gorse
using this "lure-load-infect" concept would depend, to a large extent on the virulence of
the pathogen as insects, due to the large size of F. tumidum macroconidia, can carry only
a small number of it.
4
Councell, Catie. "Killing the goose". Thesis, University of Iowa, 2018. https://ir.uiowa.edu/etd/6087.
Testo completoAbstract (sommario):
This statement of process parses out the techniques utilized when creating a character for performance, specifically focused on examples from three years of graduate studies in acting. The paper identifies and analyzes the challenges an actor encounters, and the tools an actor utilizes when crafting a character. The goal of the process paper is to identify common techniques generally, as well as examining specific techniques used infrequently. The paper concludes with a statement of the state of the artist.
5
Gaye, Aliou. "Tourisme et patrimoine culturel : valorisations,enjeux et stratégies de développement local á l’île de Gorée et en pays Bassari". Thesis, Lyon, 2020. http://www.theses.fr/2020LYSE2015.
Testo completoAbstract (sommario):
Cette présente thèse tente d’examiner les relations ambivalentes entre tourisme et patrimoine culturel à l’île de Gorée et en pays Bassari, promus tous deux au patrimoine mondial de l’humanité. Elle s’interroge sur la construction des mémoires collectives de l’esclavage, des héritages coloniaux, des identités territoriales et des paysages culturels à travers la mise en patrimoine et la mise en tourisme des ressources patrimoniales. En étudiant les jeux d’acteurs dans la protection des biens patrimoniaux et l’appropriation de l’espace, elle cherche à analyser les enjeux politiques, socioculturels, économiques et environnementaux, examiner les imaginaires touristiques et les représentations sociales, et redéfinir les stratégies de développement local. L’objectif est de montrer comment le tourisme peut contribuer à la redynamisation de ces territoires, dans un contexte où les cultures locales sont menacées par les effets contrastés de la mondialisation, et où la corruption reste encore présente. Si le processus de patrimonialisation représente un renouveau pour les collectivités territoriales, quelle politique patrimoniale et institutionnelle les professionnels du tourisme et les experts du patrimoine peuvent-ils entreprendre face aux tensions mémorielles et aux revendications territoriales et identitaires que suscitent ce mécanisme ?This thesis attempts to examine the ambivalent relationship between tourism and cultural heritage on the island of Goree and in Bassari country, both promoted to World Heritage of Humanity. She wonders about the construction of the collective memories of slavery, colonial legacies, territorial identities and cultural landscapes through the setting in heritage and the tourism of heritage resources. By studying the role of actors in the protection of heritage assets and the appropriation of space, it seeks to analyze political, socio-cultural, economic and environmental issues, examine tourist imaginations and social representations, and redefine local development. The aim is to show how tourism can contribute to the revitalization of these territories, in a context where local cultures are threatened by the contrasting effects of globalization, and where corruption is still present. If the patrimonialization process represents a renewal for local authorities, what heritage and institutional policy can tourism professionals and heritage experts undertake in the face of the memory tensions and territorial and identity claims that this mechanism provokes ?
6
Bärwald, Manuel, e Julia Meyer. "Auftakt für Manfred Gorke". SLUB Dresden, 2016. https://slub.qucosa.de/id/qucosa%3A7780.
Testo completoAbstract (sommario):
Das Bach-Archiv Leipzig hat im September mit der Digitalisierung der Sammlung Gorke begonnen. Die Leipziger Forschungseinrichtung versteht sich als musikalisches Kompetenzzentrum am Hauptwirkungsort Johann Sebastian Bachs. Sein Zweck ist, Leben, Werk und Wirkungsgeschichte des Komponisten und der weit verzweigten Musikerfamilie Bach zu erforschen, sein Erbe zu bewahren und als Bildungsgut zu vermitteln. Im Bewusstsein der Bedeutung Bachs erfüllt es im historischen Bosehaus am Thomaskirchhof einen umfassenden und vielfältigen Auftrag für eine breite internationale Öffentlichkeit.
7
Zahradník, Jiří. "Testování zranitelností v průmyslových sítích". Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2020. http://www.nusl.cz/ntk/nusl-413061.
Testo completoAbstract (sommario):
Thesis deals with testing of selected vulnerabilities from the IEC 61850 standard and following design of mitigation measures for selected vulnerabilities. Author simulated vulnerabilities of the GOOSE protocol, NTP attack and attack ona MMS client. Those attacks were GOOSE stNum, GOOSE semantic, GOOSE test bit,GOOSE replay, GOOSE flood, NTP spoofing and MMS password capture. Attacks on protocols GOOSE and MMS were successful, attack on NTP was only partially successful since the device confirmed receiving spoofed time, however it did not change it’s inner clock. Author then designed possible mitigation measures. Tool for automatic testing of selected vulnerabilities, parser for the GOOSE protocol and lightweight multiplatform parser for configuration files were created as well.The outcome of this thesis allows the implementation of lager scale tool for penetration testing of industrial networks as well as it allows implementation of discussed mitigation measures.
8
Funk, Gregory Douglas. "Locomotor-respiratory synchrony in the Canada goose". Thesis, University of British Columbia, 1990. http://hdl.handle.net/2429/41446.
Testo completoAbstract (sommario):
Using a variety of preparations, (intact birds during treadmill and overground
walking/running and free-flight; decerebrate birds during electrically induced
walking/running, passive wing flapping, and electrically induced wing flapping and
"Active" flight), this thesis examines some of the mechanisms involved in the
production and control of locomotor-respiratory coordination (entrainment) during
alternating hindlimb locomotion (walking/running) and synchronous forelimb
locomotion ("flight") in the Canada goose.
Significant coordination of locomotor and respiratory rhythms was observed
during both modes of locomotion in intact as well as decerebrate birds. While
coordination of forelimb motion and respiration was virtually complete, coordination
of hindlimb motion and respiration was sporadic. The level of entrainment during
hindlimb locomotion, however, increased with increased stride frequency, rather than
increased work rate, suggesting that proprioceptive feedback from the limbs is
involved in the production of locomotor-respiratory entrainment. Further evidence for
a role of proprioceptive feedback in the production of entrainment was provided by
the entrainment of respiration by passive wing motion in decerebrate geese.
Although feedback from the periphery was sufficient for the entrainment of wing
motion and respiration, motor nerve outputs to the wing and respiratory musculature
were also synchronized in paralyzed, decerebrate birds during electrically induced
activity, in the complete absence of phasic afferent feedback. Thus, both feedback
and feedforward mechanisms appear sufficient for the coordination of wing beat and
respiration.Science, Faculty of
Zoology, Department of
Graduate
9
Coluccy, John Matthew. "Reproductive ecology, bioenergetics, and experimental removal of local giant Canada geese (Branta canadensis maxima) in central Missouri /". free to MU campus, to others for purchase, 2001. http://wwwlib.umi.com/cr/mo/fullcit?p3012961.
Testo completo
10
Warren, Stephanie M. "Individual performance in the Canada goose Branta canadiensis". Thesis, University of East Anglia, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.386272.
Testo completo
11
Johnson, I. P. "Behavioural ecology of the Canada Goose (Branta canadensis)". Thesis, University of Reading, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.373840.
Testo completo
12
Ditrych, Marek. "Problematika vyhodnocování blokovacích podmínek rozvodny pomocí GOOSE zpráv". Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2019. http://www.nusl.cz/ntk/nusl-400562.
Testo completoAbstract (sommario):
This master thesis focuses on problematics of GOOSE messages used for evaluation of blocking conditions of substations in the electrical power plant in Opatovice (EOP). Firstly, the thesis describes the multifunctional electrical protection relay 7SJ64 as well as GOOSE messages, that are run by protocol IEC 61850. Next, it contains a brief description of the energy consumption of EOP itself, since the project was written for its protection relays. In the practical part of the thesis, an experimental network consisting of two distinct substations with three 7SJ64 multifunctional protection relays was designed together with simple blocking conditions. These require information about the state of circuit breakers. The whole communication is carried by GOOSE messages. Moreover, to inform about the loss of GOOSE messages, the logical function SI_GET_S (decoder) was used inside the coding interface of DIGSI programme called CFC. This function was then tested in the experimental network using each different condition, that experienced interruptions of communication caused either by simulated defect of optical cabels, or by „user‘s mistakes“ in the settings of communication parameters in DIGSI. Finally, the system protecting from the loss of GOOSE messages was incorporated into the existing project evaluating blocking conditions in the block substation of EOP.
13
Naples, Jessica R. "Goose Butt, Grandma Glasses, And Other Ordinary Things". The Ohio State University, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=osu1405594537.
Testo completo
14
Weegman, Mitchell Dale. "The demography of the Greenland white-fronted goose". Thesis, University of Exeter, 2014. http://hdl.handle.net/10871/16211.
Testo completoAbstract (sommario):
New analytical and technological tools have the potential to yield unprecedented insights into the life histories of migratory species. I used Bayesian population models and Global Positioning System-acceleration tracking devices to understand the demographic mechanism and likely drivers underpinning the Greenland White-fronted Goose (Anser albifrons flavirostris) population decline. I used a 27-year capture-mark-recapture dataset from the main wintering site for these birds (Wexford, Ireland) to construct multistate models that estimated age- and sex-specific survival and movement probabilities and found no sex-bias in emigration or ‘remigration’ rates (chapter 2). These formed the foundation for an integrated population model, which included population size and productivity data to assess source-sink dynamics through estimation of age-, site-, and year-specific survival and movement probabilities, the results of which suggest that Wexford is a large sink and that a reduction in productivity (measured as recruitment rate) is the proximate demographic mechanism behind the population decline (chapter 3). Low productivity may be due to environmental conditions on breeding areas in west Greenland, whereby birds bred at youngest ages when conditions were favourable during adulthood and the breeding year (chapter 4), and possibly mediated by links with the social system, as birds remained with parents into adulthood, forfeiting immediate reproductive success, although a cost-benefit model showed the ‘leave’ strategy was marginally favoured over the ‘stay’ strategy at all ages (chapter 5). Foraging during spring does not appear to limit breeding, as breeding and non-breeding birds did not differ in their proportion of time feeding or energy expenditure (chapter 6). Two successful breeding birds were the only tagged individuals (of 15) to even attempt to nest, suggesting low breeding propensity has contributed to low productivity. Although birds wintering in Ireland migrated further to breeding areas than those wintering in Scotland, there were no differences in feeding between groups during spring migration (chapter 7). These findings suggest that Greenland White-fronted Geese are not limited until arrival on breeding areas and the increasingly poor environmental conditions there (chapter 8). More broadly, these findings demonstrate the application of novel tools to diagnose the cause of population decline.
15
Rushworth, Elisabeth. "Carbonates from Olduvai Gorge, Tanzania : palaeohydrology and geochronology". Thesis, University of Liverpool, 2012. http://livrepository.liverpool.ac.uk/10193/.
Testo completoAbstract (sommario):
Carbonates are abundant in the Pleistocene sedimentary sequence at Olduvai Gorge, Tanzania. This study reports their potential for investigating palaeoenvironments and for radiometric dating using U-Pb geochronology. Using their textural characteristics the, commonly nodular, terrestrial carbonates have been placed in one of five groups. By using multiple textural and geochemical analytical techniques, the palaeohydrological origin of each group has been proposed. When referenced to the geographical and stratigraphic framework at the eastern lake margin, the carbonates have been used to identify the palaeohydrological conditions beneath specific land surfaces and how it changed through time. The results identify the onset of synsedimentary faulting below Tuff IB, the palaeohydrological significance of fault control in landscape development, and the persistence of water in discrete settings. This helps to explain why hominin activity is located in certain areas in a fault compartment. The study has proved that detailed investigation of carbonates offers an effective method for understanding the wider palaeohydrology at exposure surfaces and the factors influencing hominin exploitation at particular locations and has the potential to provide a predictive tool for future archaeological investigations. Two types of dolomite are found at different stratigraphic levels, identifying episodes of high Mg/Ca ratios in the lake, and dolomite precipitation occurring in both a basinal and a lake marginal setting. Sand-sized calcite crystals formed in the shallow sub-surface sediments on the lake floor and lake margins under anoxic to sub-oxic conditions. 238U - 206Pb dating of these zoned calcite crystals using Laser Ablation MC-ICP-MS and has produced dates only a little older than those using 40Ar/39Ar on tuffs in the same stratigraphic intervals. 234U/238U activity ratios of the Pleistocene crystals indicate that different levels are more affected by open system behaviour than others. Early-diagenetic, authigenic calcite crystals show exciting promise for directly dating saline, alkaline lake sediments which may be useful in similar hominin sites where geochronology is less well constrained.
16
Quinn, John Leo. "The timing of nesting in red-breasted geese and their nesting association with birds of prey". Thesis, University of Oxford, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.368083.
Testo completo
17
Czarnecki, Rafał. "Ocena jakości półgęsków pochodzących od gęsi w różnym wieku". Rozprawa doktorska, Uniwersytet Technologiczno-Przyrodniczy w Bydgoszczy, 2017. http://dlibra.utp.edu.pl/Content/995.
Testo completoAbstract (sommario):
W badaniach porównano wartość rzeźną oraz jakość i przydatność do procesu wędzenia mięśni piersiowych, a także właściwości fizykochemiczne i odżywcze półgęsków pochodzących od 5-letnich gęsi po okresie nieśności i młodych gęsi owsianych
18
Sanja, Đukić. "Agroekonomski faktori održivog razvoja regiona Fruške gore". Phd thesis, Univerzitet u Novom Sadu, Poljoprivredni fakultet u Novom Sadu, 2015. https://www.cris.uns.ac.rs/record.jsf?recordId=94873&source=NDLTD&language=en.
Testo completoAbstract (sommario):
U radu se analiziraju agroekonomski faktori odrţivog razvoja na primeru regiona Fruške gore. Potreba za istraţivanjem ovih faktora polazi od ĉinjenice da je poljoprivreda najzastupljenija delatnost u ovom regionu, taĉnije u njegovoj zaštitnoj zoni. Identifikovanje i kvantifikovanje agroekonomskih faktora putem relevantnih indikatora odrţive poljoprivrede prošireno je i na aspekt ruralnog razvoja. U radu je dat pregled vladajuće literature, kao i veći broj metodologija odrţivog razvoja, odrţive poljoprivrede i ruralnog razvoja. Prikazani su razliĉiti pristupi u regionalne ekonomije i oceni regionalne konkurentnosti ruralnih podruĉja u cilju sveobuhvatne analize posmatrane problematike. Date su karakteristike istraţivanog prostora na primeru Fruške gore (potencijala za odrţivi razvoj, profili opština/gradova koji ulaze u obuhvat ovog regiona, kao i prikaz odrţivih opredeljenja za sve delatnosti). Na osnovu dostupnih podataka analiziran je uticaj pojedinih agroekonomskih faktora odrţivog razvoja regiona Fruške gore, i data je procena njihovog daljeg delovanja u budućem periodu, uz uvaţavanje ostalih ekonomskih pokazatelja Republike Srbije i AP Vojvodine. U dokazivanju ili opovrgavanju hipoteza, osim identifikacije agroekonomskih faktora odrţivog razvoja, korišćeno je anketno istraţivanje svih zainteresovanih subjekata u regionu Fruške gore. Isto tako, izloţene su ideje i predlozi za buduća istraţivanja i predloţen je model koji bi na najoptimalniji naĉin valorizovao sve potencijale Fruške gore, a prvenstveno onih koji su u funkciji unapreĊenja poljoprivrede, ruralnog i odrţivog razvoja.This paper analyses agrieconomics factors of sustainable development in the case of region of Fruška gora. The need for research on these factors comes from the fact that agriculture is the most common activity in the region, specifically in its protective zone. An identifying and quantifying agrieconomics factor through relevant indicators of sustainable agriculture has been extended to an aspect of rural development. The paper gives an overview of the actual literature, and a number of methodologies for sustainable development, sustainable agriculture and rural development. Different theoretical approaches of the regional economy and the assessment of regional competitiveness of rural areas are presented, in order a comprehensive analysis of the observed issues. The characteristics of the area in the case of Fruška gora are presented (potential for sustainable development, profiles of municipalities/cities which are located in the scope of this region, as well as the sustainable orientation for all business activity). Based on available data, was analysed the influence of the certain agrieconomics factors of sustainable development of the region of Fruška gora, and assessment of their impact in the following period, together with other economic indicators of the Republic of Serbia and AP Vojvodina. In proving or disproving the hypothesis, except the identification agrieconomics factors of sustainable development, the research by a survey questionnaire of all stakeholders in the region of Fruška gora was used. Also, the ideas and suggestions for future research are expressed and a model that would optimally valorised all potentials of Fruška gora is proposed, primarily those that are aimed at improving the agricultural, rural and sustainable development.
19
Håkansson, Erik. "Nyttjande av manöverkrigföringens element – avgörande för utgången av slaget om Goose Green? : En studie av slaget vid Goose Green under Falklandskriget 1982". Thesis, Försvarshögskolan, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:fhs:diva-2693.
Testo completoAbstract (sommario):
Slaget vid Goose Green var det första slaget att äga rum på land under Falklandskriget. Slaget ägde rum under ett par dagar i slutet av maj 1982 mellan brittiska 2 Para och argentinska Task force Mercedes och slutade med en argentinsk kapitulation. Slaget är spektakulärt i flera avseenden – bland annat för att britterna lyckades slå en numerärt jämbördig försvarsgrupperad argentinsk motståndare, det var nästan enbart infanteriförband som stred och att befälhavaren för 2 Para stupade. Syftet med uppsatsen är att undersöka om nyttjandet av manöverkrigföring på de bägge sidorna kan ha varit avgörande för utgången av slaget. Utifrån beskrivningar av slaget skrivna av brittiska författare beskrivs slaget i fyra delar i uppsatsen. Efter varje del sker en analys med hjälp av element ur William S. Linds manöverteori. Det sammanvägda resultatet ur denna analys visar att britterna nyttjade element ur Linds manöverteori betydligt fler gånger än argentinarna under slaget och att det kan ha varit avgörande för utgången av slaget.
20
Berry, Patricia A. "Lake Cycles and Sediments: Locality 80, Olduvai Gorge, Tanzania". Digital Archive @ GSU, 2012. http://digitalarchive.gsu.edu/geosciences_theses/47.
Testo completoAbstract (sommario):
Studies have shown that Bed I and Lower Bed II (1.92Ma- 1.76Ma) of Paleolake Olduvai at Locality 80 are primarily composed of the authigenic lacustrine clay minerals illite, smectite, and interlayered illite-smectite. X-ray fluorescence analysis and the sedimentation rates of Hay and Kyser (2001) were used to identify four apparent lake cycles beginning and ending with saline alkaline phases. Peaks in Al2O3/MgO ratios, and TiO2 and P2O5 abundances occur at approximately the same elevations within the stratigraphic section. Low values in these three parameters indicate saline alkaline conditions whereas high values represent fresh water conditions. Lake Cycles (LC) 1 and 4 completed in approximately 44,000 years and 42,000 years respectively, which is similar to the 41k.y. year cycle associated with Earth’s obliquity. Lake Cycles 2 and 3 span approximately 24,000 years and are similar to the 21k.y. precession cycle.
21
Barnes, Ian. "The molecular identification of goose species in archaeozoological assemblages". Thesis, University of York, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.298376.
Testo completo
22
Ramos, Polyana de Almeida. "Gorie ot uma, de Aleksandr Gribóiedov tradução e aproximações". Universidade de São Paulo, 2011. http://www.teses.usp.br/teses/disponiveis/8/8155/tde-31052011-161733/.
Testo completoAbstract (sommario):
O presente trabalho é composto pela apresentação de A inteligência, que desgraça! (1825), do dramaturgo russo Aleksandr Serguéievitch Griboiédov, do universo em que foi escrita, bem como a tradução da obra-prima ao português. Essa primeira tradução carrega os dilemas inerentes à grandiosidade da linguagem e, sendo assim, o primeiro passo, na tradução da obra ao português, segue o caminho do significado para que, no futuro, o significante, complexo e rico, possa ser focado. Depois, tomamos o caminho do Teatro Russo do século XVIII e início do século XIX, seu universo neoclássico, e, ao final, as transfigurações de A inteligência, que desgraça! aos modelos clássicos, essencialmente os conflitos provenientes das ações que trabalham, nas duas tramas principais, de maneira igual.This present research is composed of a presentation of Gore ot uma (1825), by Russian playwright Aleksandr Griboedov, and of the universe in which it was written, as well as a first step in attempt of translating the masterpiece into Portuguese. This first translation embodies the dilemmas inherent to the greatness of the language and, therefore, the first step, for a translation of the masterpiece into Portuguese, follows the path of the signified, in order that, in the future, the signifier, rich and complex, may be focused. Afterwards, we take the path of Russian Theater from the Eighteenth century to the beginning of Nineteenth century, its neoclassical universe, and, in the end, in Gorie ot umas transfigurations to the classical patterns, essentially the conflicts originated by actions that work, in the two main plots, in a equal manner.
23
Mathews, Lauren. "The wild goose chase for consistency in the confidence-man". Connect to resource, 2008. http://hdl.handle.net/1811/32211.
Testo completo
24
Sjöberg, Göran. "Nesting and migration in the introduced Canada goose in Sweden". Doctoral thesis, Umeå universitet, Institutionen för ekologi, miljö och geovetenskap, 1993. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-101357.
Testo completoAbstract (sommario):
The aim of the thesis was to document patterns in breeding and migration in Swedish Canada geese Branta canadensis, to explain these against the genetic and historical background of the population, and to test predictions of hypotheses pertaining to parental investment. The Canada goose population in Sweden was founded by the introduction of a few individuals in the 1930's. DNA fingerprint similarity between geese breeding in Sweden was on average at the same level as between inbred close relatives in other wild bird species. The genetic variability of the population appeared to be considerably reduced in comparison to that of Canada geese breeding in North America. Dispersal and migration patterns were studied using plastic neck-bands that could be identified at long distance. Most Canada goose females nested at the lake where they grew up. Males were more prone to disperse than females, although most of them still returned to breed close to their area of origin. Geese from three breeding areas in Sweden had different winter distributions, although wintering areas overlapped considerably. Individual geese tended to return to the same wintering area as they had used in previous years. The females' investment in the egg clutch was related to the migration distance from spring foraging areas to the nesting area, suggesting an energetic cost of migration for egg production. Within breeding seasons, clutch size decreased with later initiation of nesting, but only in years with early breeding. A probable reason for this decrease was that body reserves available for egg production were larger in early layers. In years with late breeding, clutch size did not decrease, most likely because late-nesting females could supplement their body reserves by foraging on fresh vegetation. Nest defence intensity was studied by recording the behaviour of the female geese when a human approached the nest. The results largely confirmed predictions for nest defence intensity extracted from parental investment theory.Diss. (sammanfattning) Umeå : Umeå universitet, 1993, härtill 6 uppsatser
digitalisering@umu
25
Hulea, G. Danut. "Winter feeding ecology of the Red-breasted goose (Branta ruficollis)". Thesis, University of East Anglia, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.606314.
Testo completoAbstract (sommario):
Our knowledge of the Red-breasted goose population has improved considerably over the last 12 years with work carried out in both the breeding and wintering areas. The Romanian and Bulgarian Dobrogea is the main wintering area of the Red-breasted goose. The population size varied considerable during the study period (October 1998 - March 2001) in the wintering area from 41,195 to 88,425. The weather conditions had a strong influence on the number of the geese wintering in the Dobrogea and within the wintering area, the climate conditions influenced their distribution in most years. Geese were spread across the Dobrogea in both inland and coast regions until December. During the coldest period of the winter, in January, the whole population of Red-breasted goose was concentrated on a few lakes located on the Black Sea coast. Some of these major roost sites are protected as reserves. Most frequently, the Red-breasted geese were seen in the Dobrogea in mixed flocks with the White-fronted geese. The geese feed exclusively on crops, mainly on winter wheat but also on barley. In the late autumn in October and November, they preferred newly sown fields where they fed on seeds of winter wheat left on the surface. Later during the winter, the leaves of winter wheat and barley remained the only food available. Geese preferred to feed closer to the roost from December to February but in January, they showed a preference for fields facing east and south. Other landscape variables such as distance to the roads, distance to the villages and slope, were less important. The carrying capacity of the area was calculated and showed that the area cultivated can presently support a larger number of geese. Geese grazing caused losses of yield of on winter wheat causing economic consequences for the farmers. After privatisation, the attitude of farmers towards geese changed. Some guarded their crops, hunted geese or occasionally used poison against geese. Poison was also used more frequently against illegal sheep grazing. This practice is a major concern and affected a number of species. Hunting and farming were the main causes of disturbance during the winter. In Dobrogea, farming activity decreased from November to January. The hunting pressure was constant during the winter and larger at the weekend compared to working days.
26
Gates, Edward Breed. "The Holocene Sedimentary Framework of the Lower Columbia River Gorge". PDXScholar, 1994. https://pdxscholar.library.pdx.edu/open_access_etds/4801.
Testo completoAbstract (sommario):
The Columbia River is the largest fluvially dominated estuary in the Pacific Northwest, yet the Holocene transgressive fill of this system has not previously been studied. Nearly 1500 industry borehole and water well records in the lower Columbia River basin (LCRB) were analyzed. These records document the sedimentary infilling of the lower 120 miles of the drowned river valley that occurred during the Holocene marine transgression (10-0 ka) . Of particular importance is a key stratigraphic marker horizon of volcanic tephra that has been identified throughout the LCRB. INAA was used to determine the geochemical composition of the target tephra layer. The tephra geochemistry was then compared to geochemical data from potential Cascade source volcanos to determine whether the tephra layers are geochemically related, and the possible age and source of the tephra. The geochemical comparisons indicate that the suspect tephra horizon was derived from the climax eruption of Mount Mazama approximately 6845 years ago. Cross-sections have been constructed that record the lateral and longitudinal depositional development of the river basin. Sediment grain size distribution data have also been compiled and shows that grain size distribution does not change with respect to subsurface elevation within the LCRB. The results indicate that the LCRB has been dominated by fine sand deposition throughout the Holocene period, and silt and clay sized fractions were bypassed through the system to be deposited offshore. A total volume of 74.6 km3 of sediment has accumulated in the basin since the time of the catastrophic floods 12,700 years ago. Sediment volume analysis was used to predict past fluvial sediment supply rates and sediment retention. The volume of sediment deposition from early to late Holocene time has decreased by a factor of 2.4. Sedimentation rates in the basin are estimated from a basin isopach of the Holocene fill and from an extrapolated sediment sea-level curve. Basin sedimentation rates ranged from 12. 6 mm/yr-1 for the early Holocene to 2. 5 mm/yr-1 for the late Holocene period. This factor of 5 decrease in the sedimentation rate also indicates that the Columbia River bypassed much of its fine grained fraction through to the marine environment during the mid-late Holocene.
27
Geldenhuys, Greta. "Egyptian goose (Alopochen aegyptiacus) : sensory, biochemical and physical meat quality as affected by gender, diet and ageing". Thesis, Stellenbosch : Stellenbosch University, 2014. http://hdl.handle.net/10019.1/95871.
Testo completoAbstract (sommario):
Thesis (PhD(Food Sc))--Stellenbosch University, 2014.ENGLISH ABSTRACT: In Southern Africa, the hunting of wildfowl species has increased considerably in the past few years. Crop farmers incur major financial losses due to the feeding activities of Egyptian geese (Alopochen aegyptiacus); consequently a large number of geese are hunted in an attempt to reduce the damage caused. With the current absence of scientific information baseline research investigating the meat quality of this species is essential. The sensory profile of Egyptian goose meat was found to be very distinct in relation to the characteristics of other well-known fowl species. It has very strong game aroma and flavour attributes with a prominent metallic aftertaste. The intense aroma and flavour notes were linked to the substantially higher iron content, as well as the high overall polyunsaturated fatty acid content as revealed by chemical profiling. The trained sensory panel also found the meat to be very tough (high shear force) compared to the other species. To identify the factors which may affect the overall consistency of the meat quality, the influence of three main effects namely; season (grain vs. non-grain diet), gender and portion was investigated. This revealed that season had the largest effect and harvesting periods should therefore be considered. The main issue is the higher intramuscular fat (IMF) content in winter (July), as well as the substantial difference in the fatty acid profiles of the two seasons. The forage vs. grain based diets during certain periods of the year leads to variation in the content of key fatty acids in the meat i.e. oleic acid, linoleic acid and α-linolenic acid. In winter, the meat had a characteristic, prominent game and metallic aroma while the summer (November) profile was governed by “sweet-oily-duck” and beef-like sensory notes. The fatty acid differences also result in variation between the omega 6 to omega 3 ratios of the seasons; the portions from winter are within the recommendations (ratio<5) and those from summer not. Regarding gender, the females had a lower carcass yield but higher IMF content. The female breast portion was also more tender (lower shear force). In attempting to elucidate the toughness of the meat, possible causes have been proposed. The pH decline in the pectoralis muscle occurs quite rapidly and it is possible that the high rigor temperature (>20 °C) may contribute to the increased toughness. Regardless of the proteolytic enzyme activity during the rigor period, the meat is still tough at 36 h post mortem and the proteolytic contribution may be overshadowed by the background toughness, i.e. the connective tissue content and fibre structure. The latter was confirmed when the breast portions were aged for 14 days and no change (decline) in the shear force values was observed even though myofibrillar degradation did occur (during ageing). Given the lack of a decline in the shear force, the aging of Egyptian goose meat as a means of improving the overall toughness cannot be proposed without further research. The study in its entirety provides substantial proof that the commercial utilisation of Egyptian goose meat is feasible.
AFRIKAANSE OPSOMMING: Die jag van wildsvoël spesies in Suider-Afrika het aansienlik toegeneem in die laaste paar jaar. Graanboere lei jaarliks groot finansiële verliese as gevolg van die voedingsgedrag van kolganse (Alopochen aegyptiacus). Gevolglik word ‘n groot hoeveelheid ganse elke jaar geoes om sodoende die skade te verminder. Met die huidige tekort aan wetenskaplike inligting is grondslag navorsing rakende die vleiskwaliteit van hierdie wildsvoël spesie noodsaaklik. Die sensoriese profiel van kolgansvleis is baie uniek in vergelyking met die vleis van ander bekende voël spesies. Dit word gekenmerk deur die sterk wildagtige aroma en geur tesame met ‘n baie prominente metaal nasmaak. Hierdie intense aroma en geur hou verband met ‘n baie hoër yster-inhoud, asook ‘n hoë poli-onversadigde vetsuur profiel soos uitgewys deur die chemiese karakteriserings studie. Die opgeleide sensoriese proepaneel het ook die vleis van hierdie voël spesie beskou as baie taai in vergelyking met die vleis van ander spesies. Ten einde te bepaal watter faktore die algehele variasie in vleiskwaliteit sal beïnvloed, is drie hoofeffekte naamlik, seisoen (graan teenoor nie-graan dieet), geslag en porsie ondersoek. Die verskeie studies het uitgewys dat seisoen die grootste invloed het en daarom sal die periodes waarin ganse geoes word in ag geneem moet word. Die hoër intramuskulêre vetinhoud in winter (Julie), asook die aansienlike verskil in die vetsuur profiele van die twee seisoene is die vernaamste verskille. Die weiding (hoofsaaklik gras) teenoor graan diëte wat gevolg word in sekere dele van die jaar lei tot variasie in die inhoud van belangrike vetsure (oliensuur, linoleïensuur en α-linoleensuur) in die vleis. In die winter het die vleis die kenmerkende en prominente wild geur en metaalagtige nasmaak getoon terwyl die profiel in die somer (November) hoofsaaklik bestaan het uit “soet-olierige-eend” en beesvleis geure. Die vetsuur verskille lei ook tot ‘n verskil in die omega-6 tot omega-3 verhouding van die seisoene; in die winter is die porsies binne die aanbevole voedingsvereistes (<5) terwyl die somer porsies nie aan hierdie vereistes voldoen het nie. Rakende die invloed van geslag, het die vroulike voëls ‘n laer karkas massa getoon tesame met ‘n laer intramuskulêre vetinhoud. Die borsie van die vroulike kolganse was ook sagter. In ‘n poging om die taaiheid van kolgansvleis te verklaar, is ‘n paar moontlike oorsake voorgestel. Die na-doodse pH daling in die borsspier vind redelik snel plaas, daarbenewens is dit ook moontlik dat die hoë temperature (>20 °C) waartydens rigor mortis plaasvind, kan bydrae tot die taaiheid. Ongeag die werking van die proteolitiese ensieme tydens die rigor periode was die vleis steeds taai 36 uur na dood, daarom was die proteolitiese bydrae moontlik oorskadu deur die agtergrond-taaiheid, dit wil sê die bindweefsel inhoud en vesel struktuur. Laasgenoemde is bevestig toe die borsspiere verouder is vir ‘n tydperk van 14 dae. Geen verandering (afname) in die instrumentele taaiheid is waargeneem nie, selfs al het miofibrillêre afbraak plaasgevind. Aangesien daar geen afname in instrumentele taaiheid opgemerk is nie kan veroudering van kolgansvleis, met die doel om die taaiheid te verbeter, nie aanbeveel word voor verdere navorsing nie. In geheel voorsien hierdie studie beduidende motivering rakende die moontlike kommersiële aanwending van kolgansvleis.
28
Fox, Anthony David. "The Greenland White-fronted goose Anser albifrons flavirostris : the annual cycle of a migratory herbivore on the European continental fringe /". [København] : National Environmental Research Institute, Ministry of the Environment, 2003. http://www.dmu.dk/1%5Fviden/2%5Fpublikationer/3%5FOvrige.
Testo completo
29
Garcia, Delia M. "The role of the giant Canada goose (Branta canadensis maxima) cecum in nutrition". Diss., Columbia, Mo. : University of Missouri-Columbia, 2006. http://hdl.handle.net/10355/4354.
Testo completoAbstract (sommario):
Thesis (Ph.D.)--University of Missouri-Columbia, 2006.The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file viewed on (April 25, 2007) Vita. Includes bibliographical references.
30
Gravier, Nicolas. "L'utilisation du polytetrafluoroethylene expanse (gore-tex) en chirurgie palpebrale". Nancy 1, 1990. http://www.theses.fr/1990NAN11059.
Testo completo
31
Vargas, Alfaro Roque. "Análisis de la audiencia peruana consumidora de cine gore". Bachelor's thesis, Universidad Peruana de Ciencias Aplicadas (UPC), 2020. http://hdl.handle.net/10757/653161.
Testo completoAbstract (sommario):
El siguiente trabajo analiza a la audiencia peruana consumidora de cine gore, tomando como referencia las acusaciones acerca de cómo un subgénero específico está relacionado a un cierto tipo de público y los caracteriza con ciertos atributos. El proyecto busca esclarecer la idea de cómo el cine repercute en la audiencia y si este es un factor clave en los comportamientos del consumidor. Se investigará desde los primeros años del cine de terror, hasta la actualidad, donde se plantea la problemática del proyecto. Se llevará a cabo un modelo interpretativo realizando un análisis de audiencia y tomando como instrumento entrevistas a profundidad a las personas de estudio. Se busca el aporte al gremio audiovisual basándonos en cómo el cine puede o puede no llegar a concientizar a un grupo de personas acerca de un tema particular.The following work analyzes the Peruvian consumer audience of gore films, taking as reference the accusations about how a specific subgenre is related to a certain type of audience and characterizes them with certain attributes. The project seeks to clarify the idea of how cinema affects the audience and whether this is a key factor in consumer behavior. It will be investigated from the first years of horror cinema until today, where the problem of the project arises. An interpretive model will be carried out by conducting an audience analysis and using in-depth interviews with the study people as an instrument. The contribution to the audiovisual union is sought based on how cinema may or may not raise awareness among a group of people about a particular topic.
Trabajo de investigación
32
Nilsson, Nicklas. ""En stridsplan överlever sällan första stridskontakt" : Slaget om Darwin – Goose Green". Thesis, Swedish National Defence College, Swedish National Defence College, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:fhs:diva-151.
Testo completoAbstract (sommario):
Den 26 maj 1982 påbörjas anfallet mot samhällena Darwin och Goose Green. Anfallande styrka är brittiska, 2 Paras, på plats och försvarsgrupperade är Taskforce Mercedes. Britterna vinner slutligen över en numerärt överlägsen och försvarsgrupperad argentinsk styrka. Hur kommer det sig att detta kan ske? Jag kommer, för att kunna besvara mina frågeställningar, i det här självständiga arbetet att med utgång i de grundläggande förmågorna, ledning, verkan, skydd, rörlighet, uthållighet och und/info, analysera slaget. Dessa frågeställningar är:
- Vilken av de grundläggande förmågorna var avgörande för 2 Paras seger?
- Vilken av de grundläggande förmågorna var avgörande för Taskforce Mercedes förlust?
Jag har kommit fram till följande; britterna kunde tack vare en kombination av förmågorna ledning och verkan avgöra striden till deras fördel. För argentinarna var det förmågan ledning som bäddade för deras förlust. Vill du veta hur jag kommit fram till detta och varför uppmanar jag dig att läsa detta arbete.
My name is Nicklas Nilsson. I’m a cadet studying at the Swedish Land warfare Centre. As a part of becoming a commissioned officer I’m obligated to write an essay at fundamental level. I have written about the Battle for Darwin – Goose Green. A battle between 2 Para and Taskforce Mercedes. I have used (de grundläggande förmågorna) six fundamental abilities as an analysis instrument. The questions I am going to answer with this essay are:
-What ability was decisive for 2 Para’s victory?
-What ability was decisive for Taskforce Mercedes defeat?
Initially I will conduct a literature study, followed by a comparative case study.
I have come to the following conclusions:
The Argentines lost due to their lack of a good leadership and
The British won due to the abilities, better trained, better motivated and with more experience. They also, contrary to the Argentines, had leaders that was present and tried to resolve the situations they’ve gotten in to. If you want to read more about this and how I’ve come to these conclusions, please read this essay.
33
Wilde, Timothy Philip. "An Energy Based Model for the Compressive Behavior of Goose Down". Thesis, Georgia Institute of Technology, 2004. http://hdl.handle.net/1853/4899.
Testo completoAbstract (sommario):
Very little work has been done to study and understand the internal mechanisms that provide goose down with its resiliency under repeated compression. We have employed low magnification optical microscopy to identify some of these important mechanisms. Microscopy showed that a small tertiary structure exists on most goose down fibers and creates an important point of contact when two fibers interact. This tertiary contact mechanism has been coupled with fiber orientation and incorporated into a unique strain-energy function. The principal stresses for an initial compression cycle can be determined from this strain-energy function according to the hyperelastic constitutive theory. Irreversible deformation and hysteresis necessitate another means to determine the stresses during unloading and reloading. For these stages, the framework used by Beatty et al. (2002) for an ideal Mullins material will be utilized in conjunction with a shift in the stress-free state to determine the principal stresses. The proposed model is then evaluated for uniaxial compression and shown to capture the general behavior of goose down in compression including the irreversible deformation and hysteresis.
34
Graettinger, Alison Hollomon. "Depositional record of historic lahars in the Whangaehu Gorge, Mt. Ruapehu". The University of Waikato, 2008. http://hdl.handle.net/10289/2336.
Testo completoAbstract (sommario):
Mt. Ruapehu is one of the most lahar prone volcanoes in the world, having both a crater lake and six small glaciers upon its 2797 m summit. The major outlet for the crater lake, the Whangaehu Gorge, has hosted over 46 historic lahars. However, the low preservation of debris flow deposits, as a result of frequent remobilisation on steep slopes, allows for the detailed description of only 9 lahar events over the last 150 years. Field investigation, historic aerial photos, two airborne LiDAR surveys and direct measurements have been utilised to describe the sedimentology, geomorphology and distribution of historic lahar deposits in the first 11 km of the Whangaehu Gorge. Inundation maps have been created for 1945, 1953, 1975, September 1995, October 1995, March 2007 and September 2007. Grain size distribution, componentry and geomorphology of the 1861, 1975, September 1995, October 1995, 1999 and 2007 lahar deposits have been compared. The lahar deposits are massive, very poorly sorted, silty gravels that form a series of unconsolidated terraces. The limited sediment sources in the steep sided Whangaehu Gorge, including minor historic eruption products, results in significant recycling of lahar deposits. However, the deposits can be differentiated by proportions of lithological components and in some cases anthropogenic debris. The abundance of hydrothermally altered material reflects the role of Crater Lake in lahar formation, although, some of these materials (gypsum, sulphur and snow) are only temporary. Non-cohesive debris flows and occasional snow slurry lahars have been formed by a range of triggering mechanisms associated with and independent of eruptions. Lahars have been formed in the Whangaehu Valley as the result of ejected crater lake water and associated snow melt (1975, September 1995 and September 2007), as well as the progressive displacement of lake water as a result of lava dome growth (1945) and uplift of the lake floor (1968). Inter-eruption lahars occur as a result of Crater Lake outburst floods (1861, 1953 and March 2007) and remobilisation by precipitation and the collapse of tephra laden snow (October 1995 and 1999). The comparison of historic lahars also reflects the range of lahar magnitudes experienced historically on Ruapehu. The most recent Crater Lake outburst of March 2007, with a peak discharge of 1700-2500 m3/s is the second largest recorded lahar, behind only the eruption-generated lahar of April 1975 with a peak discharge of 5000-7500 m3/s. Lahar mitigation can subsequently be based on lahar generation and incorporation of the vast amounts of data collected before and after the 2007 outburst flood. Recent remobilisation and phreatic activity suggest the significant under-representation of small volume events like rain-generated and snow slurry lahars in the geologic record.
35
Canaris, John Pano. "The tufa deposits of Limestone Gorge, Gregory National Park, Northern Territory /". Title page, contents and abstract only, 1993. http://web4.library.adelaide.edu.au/theses/09SB/09sbc213.pdf.
Testo completoAbstract (sommario):
Thesis (B. Sc.(Hons.))--University of Adelaide, Dept. of Geology and Geophysics, 1994.Sheet SE/52-3 international index. Six coloured plates have overlays. Includes bibliographical references (leaves 23-25).
36
Reighart, Stephanie. "Rock climber perspectives of management issues in the Red River Gorge". Connect to resource, 2007. http://hdl.handle.net/1811/30085.
Testo completo
37
Jung, Misook. "Exploring academic and social adjustment of "Korean goose adolescents" in Canada". Thesis, McGill University, 2012. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=106450.
Testo completoAbstract (sommario):
The purpose of this study is to explore the lived experiences of Korean "goose" adolescents who attempt to adjust themselves to academic and social environments in Canada. In this study, Korean goose adolescents are defined as those who come to English-speaking countries for a few years to seek out better learning opportunities; their fathers usually stay in Korea to earn money and provide economic support for their families, whereas the mothers take their children abroad to study (Choi, 2005b). Using an interpretive phenomenological analysis (IPA), the researcher conducted semi-structured and in-depth interviews with four Korean goose adolescents residing in Toronto. Findings revealed that these goose adolescents underwent significant adjustment difficulties. Despite their success in academic areas, they encountered various problems on a social level, due to both English language and cultural differences. However, they sought to develop adjustment strategies by obtaining practical assistance from co-ethnic groups: Korean churches and family members. They also attempted to change themselves into active, open-minded and independent learners. Although they still faced challenges and lacked sufficient support, they showed overall satisfaction with living and studying in Canada.Le propos de la présente étude est d'explorer l'expérience vécue d'adolescents coréens migrateurs (Korean goose adolescents) qui tentent de s'adapter à des environnements académique et social différents au Canada. Pour les fins de cette étude, les adolescents coréens migrateurs sont définis comme ceux qui effectuent des séjours de quelques années en des pays anglophones afin d'obtenir de meilleures opportunités d'apprentissage; le plus souvent, les pères de ces adolescents demeurent en Corée dans le but de mieux supporter financièrement leur famille, tandis que les mères accompagnent leur enfants à l'étranger (Choi, 2005b). Préconisant une analyse interprétative de type phénoménologique, la chercheuse a mené des entrevues semi-structurées et en profondeur auprès de quatre adolescents coréens migrateurs résidant à Toronto. Les résultats de l'étude montrent que ces adolescents, culturellement mal préparés, ont dû faire face à de multiples difficultés d'acculturation en sol canadien. Malgré leur succès académique, ces étudiants ont été confrontés à une série de problèmes relationnels avec leurs amis étrangers et ce, en raison de différences d'ordre culturel et linguistique (eu égard à l'usage de la langue anglaise). Pour résoudre ces difficultés, ils ont œuvré à développer des stratégies adaptatives en obtenant l'assistance pratique de membres de communautés ethniques davantage apparentées à la leur, d'églises coréennes et de leur famille. Ils ont également tenté de modifier leur propre attitude personnelle – devenant plus actifs, indépendants et ouverts d'esprit – afin de faciliter leur adaptation. Bien qu'étant toujours dans l'obligation de relever d'importants défis et souffrant d'un réel manque de soutien, ces étudiants éprouvent malgré tout, globalement, de la satisfaction à vivre et à étudier au Canada.
38
Tinkler, E. "Behaviour and ecology of the light-bellied goose wintering in Ireland". Thesis, Queen's University Belfast, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.487463.
Testo completoAbstract (sommario):
The behaviour, ecology and energetics of the East Canadian High Arctic light-bellied brent goose (Bronto bernicla hrota) was investigated to determine winter feeding Site selection on Strangford Lough, Co Down, Northern Ireland. The seasonal use of mudflats, saltmarsh and improved pasture was assessed to evaluate the role these habitats play in fulfilling the energy requirements of the geese throughout the wintering period. Brent geese began feeding on eelgrasses Zostera spp. on arrival in late August early September. Single adults arrived first and were in poorer physical condition than paired or family adults which arrived later. Differences in distribution of feeding and physical condition suggests that families are more able than paired or single birds to maintain access to a better quality/quantity food supply over the winter. The activity budget and net energy results highlight the importance of Zostera spp. and the energetic constraints faced by brent geese feeding on Zostera spp. over winter. Position-sensitive radio telemetry provided an accurate and effective method for determining the time spent feeding by individual brent geese throughout the 24hour period in late winter early spring. At this time brent geese rely heavily on the contribution from improved pasture in order to meet their daily net energy . requirement prior to spring migration. Brent geese engaged in night time feeding, exclusively on the mudflats. Night-time feeding occurred from October to April, peaking in mid-winter. This activity appears to be a strategy for the geese to meet their energy requirements during shorter, colder winter days. Feeding on saltmarsh vegetation occurs subsequent to the depletion of Zostera spp. and at a critical time in mid winter and is constrained by the availability and quality, rather than quantity, of the food resource. The study's findings would suggest that for the future conservation of the geese the main conservation requirements for the population is the maintenance of intertidal habitat quality together with the creation of inland refuaes in areas where there may be conflict with agricultural interests.
39
Gonse, François. "L'Art japonais, publié par Louis Gonse en 1883 : enjeux et impacts". Paris 4, 1996. http://www.theses.fr/1996PA040289.
Testo completoAbstract (sommario):
Vers la fin du XIXe siècle,en 1883 était publié à Paris sous le titre "L'Art japonais", le premier ouvrage capital sur l'art du Soleil Levant, fruit d'une vaste érudition et de l'application de méthodes historiques et scientifiques. L'auteur de ce livre, Louis Gonse, était à l'époque directeur de la Gazette des Beaux Arts. Dans le courant des années 1870 jusqu'au début des années 1880, il était devenu un expert de renom en art japonais et possédait une importante collection d'objets d'art japonais d'une qualité indéniable. L'étude présentée ici a pour objectif de comprendre pourquoi "L'Art japonais" publié en 1883 fut considéré comme une oeuvre de grande valeur jusque dans les dernières années du XIXe siècle et pourquoi au XXe siècle il s'est vu dénié le statut d'ouvrage "sérieux" sur l'art japonais. Louis Gonse avait pourtant mis en pratique une méthode scientifique pour construire son histoire de l'art du Japon, avait fait des recherches approfondies sur toutes les données écrites disponibles et surtout il avait "interrogé" les objets japonais figurant dans les collections d'art occidentales. Si l'"Art japonais" de Louis Gonse peut paraître dépassé sur certains points, il offre encore aux lecteurs d'aujourd'hui une quantité appréciable d'informations valables sur les artistes japonais et sur l'éventail des techniques qu'ils utilisaientAlmost at the end of the XIXe century in 1883 the first comprehensive book ever written in the world about art and history of art in Japan is published in Paris under the title "L'art japonais". Numerous illustrations add to the attractiveness of the book. .
40
Skabelund, Andrew G. "Governing Gorée: France in West Africa Following the Seven Years' War". BYU ScholarsArchive, 2012. https://scholarsarchive.byu.edu/etd/3655.
Testo completoAbstract (sommario):
In 1763, France had just suffered a devastating loss to the British in the Seven Years' War. In almost an instant, France's claims to West Africa shrank to the tiny island of Gorée off the coast of Senegal and a few trading posts on the mainland. This drastic reversal of fortunes forced France to reevaluate its place in the world and rethink its overall imperial objectives and colonial strategies, and in an effort to regroup, the French Empire sent a new governor, Pierre François Guillaume Poncet de la Rivière, on a mission to regain its foothold in West Africa. From this tiny island, France eventually succeeded in overturning its devastating losses and establishing itself as the dominant force in the region over the next two centuries, so deeply ingraining its influence into the core of West Africa that its imperial influence is still felt today.Despite France's future success, Poncet's tenure as governor was fraught with mismanagement and poor planning. Poncet believed he had the full backing of the Duc de Choiseul, but Poncet's excessive zeal, inability to effectively employ and listen to subordinates, and rash interactions with the British undermined the French presence in the region and ultimately led to his dismissal. Poncet's governorship sheds new light on Choiseul's goals for the Senegambia region and his underestimation of what it took to establish a strong presence.
41
Speed, James D. M. "Ecosystem engineers of the tundra the impacts and extent of goose herbivory in the high Arctic /". Thesis, Available from the University of Aberdeen Library and Historic Collections Digital Resources, 2009. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?application=DIGITOOL-3&owner=resourcediscovery&custom_att_2=simple_viewer&pid=26470.
Testo completo
42
Wagner, Anne. "Gorze au XIe siècle : contribution à l'histoire du monachisme bénédictin dans l'Empire /". Nancy : [Turnhout] : ARTEM ; Brepols, 1997. http://catalogue.bnf.fr/ark:/12148/cb37066527f.
Testo completoAbstract (sommario):
Th.--Lettres--Nancy 2, 1993.Contient le texte latin du catalogue de la Bibliothèque de Gorze au XIe siècle, et celui de deux calendriers liturgiques de Gorze, XIIe et XIVe siècles. Bibliogr. p. 501-529. Index.
43
Cui, Chen. "MRI fat-water separation using graph search based methods". Diss., University of Iowa, 2017. https://ir.uiowa.edu/etd/5740.
Testo completoAbstract (sommario):
The separation of water and fat from multi-echo images is a classic problem in magnetic resonance imaging (MRI) with a wide range of important clinical applications. For example, removal of fat signal can provide better visualization of other signal of interest in MRI scans. In other cases, the fat distribution map can be of great importance in diagnosis.
Although many methods have been proposed over the past three decades, robust fat water separation remains a challenge as radiological technology and clinical expectation continue to grow. The problem presents three key difficulties: a) the presence of B0 field inhomogeneities, often large in the state-of-the-art research and clinical settings, which makes the problem non-linear and ill-posed; b) the ambiguity of signal modeling in locations with only one metabolite (either fat or water), which can manifest as spurious fat water swaps in the separation; c) the computational expenditure in fat water separation as the size of the data is increasing along with evolving MRI hardware, which hampers the clinical applicability of the fat water separation.
The main focus of this thesis is to develop novel graph based algorithms to estimate the B0 field inhomogeneity maps and separate fat water signals with global accuracy and computational efficiency. We propose a new smoothness constrained framework for the GlObally Optimal Surface Estimation (GOOSE), in which the spatial smoothness of the B0 field is modeled as a finite constraint between adjacent voxels in a uniformly discretized graph. We further develop a new non-equidistant graph model that enables a Rapid GlObally Optimal Surface Estimation (R-GOOSE) in a subset of the fully discretized graph in GOOSE. Extensions of the above frameworks are also developed to achieve high computational efficiency for processing large 3D datasets. Global convergence of the optimization formulation is proven in all frameworks. The developed methods have also been extensively compared to the existing state-of-the-art fat water separation methods on a variety of datasets with consistent performance of high accuracy and efficiency.
44
Pittsenbarger, Mark Alan. "A Study of Understory Plant Recovery After a Forest Fire in the Columbia River Gorge". PDXScholar, 1994. https://pdxscholar.library.pdx.edu/open_access_etds/4772.
Testo completoAbstract (sommario):
Between October 9, 1991 and October 16, 1991 a fire burned 577 hectares in the Columbia River Gorge near the west end on the Oregon side. All of the area burned consisted of second growth Pseudotsuga menziesii and the accompanying understory. This was the first disturbance of this magnitude in this part of the Columbia River Gorge since 1902. The purpose of this study was to examine the pattern of understory recovery in the first two years following the fire. This study also sought to learn: 1) how Pseudotsuga menziesii seedlings are recruited into the population, 2) how quickly the litter layer is a reforming, and 3) how quickly snags and downed logs are recruited into the understory. Four 800 square meter circular plots were established within the burned area of the Columbia River Gorge. Two plots were designated sun plots since the fire had killed the overstory. The other two were designated shade sites since the canopy over them was still intact. Twenty five randomly placed sample units (20 x 50 centimeters) were placed in each main plot. The plots were then sampled at approximately onemonth intervals from May through September of 1992 and 1993. The frequency and percentage of cover was recorded for all plant species that occurred in each sample unit. The data from 1992 and 1993 were compared by date of visit and type of plot, either (sun or shade) using the Pearson Goodness-of-Fit Test to examine and compare differences in the extent of cover and distribution of understory species. No significant differences were found. An increase in species richness and relative abundance of understory species was noted between pre-fire data collected by the US Forest Service and what I found. However, statistical analysis was not possible because of the limited data collection in the pre-fire sample.
45
Vidal, David. "Evaluations sylvicole et environnementale d’un itinéraire forestier incluant la culture d’un sous-bois fixateur d’azote : Expérimentations in situ de longue durée dans les Landes de Gascogne". Thesis, Bordeaux, 2019. http://www.theses.fr/2019BORD0240.
Testo completoAbstract (sommario):
L’extraction croissante de la biomasse des forêts cultivées peut impacter la fertilité des sols, par des exports soutenus de nutriments. Parmi eux, l’azote est l’un des éléments qui limitent le plus la croissance des forêts dans le monde. La disponibilité en azote joue donc un rôle clé dans le maintien ou l’augmentation de la productivité sylvicole, et fait ainsi apparaître la fertilisation comme une pratique potentiellement utile. Pour se prémunir des effets néfastes de la fertilisation chimique sur l’environnement, il est un usage alternatif issu de l’agroécologie, qui consiste à intégrer des espèces fixatrices d’azote dans les cultures. Cette solution écologique a été éprouvée avec de nombreux succès en peuplements mixtes forestiers combinant des arbres fixateurs et non-fixateurs. Cependant, l’usage d’un sous-bois fixateur au sein d’un peuplement forestier relève encore aujourd’hui de l’innovation technique et reste ainsi largement à étudier. L’objectif général de la thèse était d’enrichir nos onnaissances sur le fonctionnement d’un écosystème forestier intensivement géré en milieu oligotrophe qui inclue l’utilisation d’un sous-bois fixateur d’azote. Nous nous sommes pour cela concentrés sur l’étude des interactions biotiques et des cycles biogéochimiques des nutriments dans une jeune culture de pins maritimes (essence de production) en forêt des Landes de Gascogne, dont le sous-bois a été cultivé en ajoncs d’Europe (plante fixatrice). Nous nous sommes parallèlement appliqué à déterminer si localement la culture du sous-bois pouvait maintenir, voire augmenter la production forestière. Des essais forestiers, correspondant à différents stades d’avancement de l’itinéraire sylvicole testé, ont été conduits en plein champ avec des itinéraires conventionnels. Dans un premier temps, la culture du sous-bois de légumineuses augmente la compétition pour la lumière et l’eau sur les arbres. Avant l’âge de 3–4 ans, la compétition pour la lumière conduit les pins à une allocation préférentielle de la croissance pour la hauteur de tige, aux dépends de la croissance en diamètre. Avant 4–5 ans, la compétition pour la ressource en eau augmente la mortalité des pins, et diminue leur potentiel hydrique et leur conductance stomatique lors des épisodes de sécheresses estivales. Cependant, la nutrition en azote des pins est améliorée et aucune compétition pour les nutriments, tel que le phosphore, n’est visible. Suite au broyage du sous-bois, intervenant aux alentours de 5–6 ans, les pins compensent la perte de production sur 2 ans, grâce à la levée de la compétition interspécifique et à une fertilisation continue en azote, soutenue par la minéralisation du broyat d’ajonc. Plus généralement, la conduite de l’itinéraire sylvicole améliore la fertilité en azote et le stockage en carbone du sol, et aucune pollution en nitrate n’est à déplorer. La poursuite des études en cours sera nécessaire pour mettre en évidence un éventuel gain de production sylvicole à plus long terme. Localement, nous recommanderions aux gestionnaires forestiers, dans le cas où l’ajonc serait présent en quantité importante, de retarder de quelques années le premier broyage du sous-bois. Des essais dans des écosystèmes comparables pourraient ouvrir de nouvelles possibilités d’application vers d’autres régions forestières et permettre la poursuite des recherches sur le fonctionnement écologique des associations sylvicoles avec des sous-bois fixateurs d’azoteThe increase in extraction of biomass from cultivated forests could negatively affect soil fertility because of high nutrient exportations. Nitrogen, an essential nutrient, is one of the most limiting factors for global forest growth. Therefore, soil nitrogen availability plays a key role in the stability or the increase in forest productivity, and suggests that fertilisation would be a necessary practice. However, in order to avoid the environmental concerns associated with the use of chemical fertilisers, an alternative coming from agroecology could integrate nitrogen-fixing species into the cropping system. This ecological option was successfully applied in forestry in mixed tree plantations associating nitrogen-fixing trees with non-fixing trees. Nevertheless, the innovating technic using nitrogen-fixing shrubs as an intercrop in forestry has to be further studied. The overarching objective of the thesis consists in improving our knowledges about the functioning of intensively managed forest ecosystems including fixing species in oligotrophic soil. To do that, we studied biotic interactions and nutriments biochemical cycles in a young maritime pine plantation (production tree), intercropped with European gorse (nitrogen-fixing species), in the Landes de Gascogne region (SW of France). We also assessed whether a gorse intercropping could maintain or increase the forest production in this forest range. Several forest trials, corresponding to various growth stages of the tested forest itinerary, were conducted in the field with conventional itineraries. Results showed that gorse understorey growth increases both light and water competition with pine. Light competition occurs in the first three to four years after trial installation, with for pine a preferential growth allocation to stem height, at the expense of diameter growth. Competition for water occurs prior to four to five years, with an increase in pine mortality and a decrease in pine water potentials during drought events in summer. However, the pine nitrogen content is increased and competition for soil nutrients, such as phosphorus, is absent throughout this time. After understorey crushing, carried out around five to six years, pines recover the production delay in two years. This is due both to an alleviation of the interspecific competition from the gorse and to a lasting nitrogen fertiliser effect, sustained by the mineralisation of crushed gorse plant material. More precisely, this mixing technique promotes nitrogen fertility and carbon storage in soil, without subsequent nitrate pollution. Further studies will be needed to show a possible gain for forestry production in the longer term. At a local scale, we recommend managers to delay the first understorey control in the case of an abundant gorse understorey. Trials in similar ecosystems could create new opportunities to apply this fertilisation technique in other forest regions
46
Neilson, Lucy Elizabeth. "The fiction of history : Gore Vidal, from Creation to Armageddon". Thesis, University of Oxford, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.314437.
Testo completo
47
Bensoussan, Nicole. "Le thème de la décadence dans l'oeuvre de Gore Vidal". Bordeaux 3, 1991. http://www.theses.fr/1991BOR30040.
Testo completoAbstract (sommario):
Le point de depart a ete une difinition generale de la decadence, a savoir un acheminement vers la ruine, vers la degradation des moeurs, l'abaissement des lettres et des arts, en marquant bien la difference entre declin et decadence. Une reflexion sur la decadence se definit par rapport a une norme, qui est ici la reve americain. Toute l'oeuvre de gore vidal est une quete de ce paradis perdu dans une societe qui accentue l'impossibilite de cette quete, et cree de fausses valeurs, valeurs eminemment decadentes, puisqu'elles tendent a detruire l'authenticite de l7etre, menant ainsi a sa destruction, a l'aneantissement de la societe, telle qu'elle est definie dans le reve americain, a la fin d'une croyance avec la mort de dieu. A travers ces divers aspcets de la decadence, c'est un probleme existentiel que pos4 l'auteur et certains de ses personnages, comme myra breckinridge, sont le qymbole de ce que l'homme peut devenir s'il n'y prend pas garde. Sa critique tend a reveiller les consciences en demontrant les dangers auxquels la societe s'exposeThe starting-point is a general definition of the term decadence, that is path leading to ruins, to the declining of mores, of literature and arts, stressing the difference between decline and decadence. A reflection on the theme of decadence must be seen in relation to a norm, which is the american dream. Gore vidal's works are a quest for the paradise lost in a society which accentuates the impossibility of that quest, creating false values, eminently decadent in so far as they tend to destroy the authenticity of the human being, thus leading to his destruction, to the destruction of society, such as defined in the american dream, to the end of faith with the death of god. Through the various aspects of decadence, gore vidal raises an existential problem and, through his characters, especially myra breckinridge, he shows that man can become if he doesn't take care. His criticism tends to wake consciousness by denouncing the dangers to which society is submitted
48
AZAN, LIONEL. "Utilisation du polytetrafluoroethylene (e-ptfe gore tex) dans la rhinoplastie". Toulouse 3, 1988. http://www.theses.fr/1988TOU31320.
Testo completo
49
Miloš, Ilić. "Diverzitet, distribucija, diferencijacija mikrostaništa i struktura zajednica mahovina Fruške gore". Phd thesis, Univerzitet u Novom Sadu, Prirodno-matematički fakultet u Novom Sadu, 2019. https://www.cris.uns.ac.rs/record.jsf?recordId=110577&source=NDLTD&language=en.
Testo completoAbstract (sommario):
U radu je analizirana brioflora Fruške gore. Cilj istraživanja bio je utvrđivanje diverziteta, distribucije, uslova mikrostaništa i strukture zajednica mahovina na različitim tipovima staništa na Fruškoj gori. Takođe, jedan od ciljeva je bio i testiranje i optimizacija metode za kvantitativna uzorkovanja briofita na različitim tipovima staništa. Terenska istraživanja su vršena u periodu 2013-2017 godine. Zapotrebe florističkih istraživanja terenska uzorkovanja su vršena metodom transekta na 120 lokaliteta na području Fruške gore. Za testiranje i optimizaciju metoda za kvantitativna briološka uzorkovanja korišćene su različite varijante metoda „kvadrata“ (metod ugneždenih kvadrata za prizemnu briofloru i metod postavljanja mikroplotova na različitoj udaljenosti za epifitsku briofloru). Odgovarajuće metode su odabrane na osnovu kriva minimum areala i kriva sličnosti (eng. species-area curve, similarity area curve). Odgovarajuće metode su primenjene za dalja uzorkovanja u ovom istraživanju. Na pojedinim lokalitetima (šumska i livadska staništa) vršeno je merenje nekoliko ekoloških parametara (pH zemljišta i kore drveta, vlažnost zemljišta, temperatura zemljišta, pokrovnost stelje, pokrovnostzeljastih vaskularnih biljaka, udaljenost od potoka u šumskim staništima i udaljenost šumskih ekosistema na livadskim staništima) u cilju utvrđivanja uticaja merenih ekoloških parametara na diverzitet i distribuciju briofita. Briofitske zajednice su utvrđene na različitim tipovima staništa i podloge uz pomoć „label propagating community detection“ analize.Rezultati ovog istraživanja su pokazali da je Fruškagora područje koje se odlikuje visokim diverzitetom briofita i ukupno je zabeleženo 235 briofitskih taksona (na osnovu literaturnih podataka i terenskih istraživanja). 73 taksona briofita je prvi put zabeleženo na području Fruške gore. Od ukupnogbroja taksona, 11% je pod nekim stepenom ugroženosti ili zakonske zaštite. Metoda mikrocenoze se pokazala kao najadekvatniji metod za kvantitativna uzorkovanja prizemnih briofita (sa minimalnom adekvatnom veličinom kvadrata 0.5x0.5 m u šumskim odnosno 1x1 m na livadskim staništima). Za epifitske briofite, kao najadekvatnija se pokazale metoda postavljanja mikroplotova dimenzija 10x10 cm sa sve četiri strane stabla na međusobnoj udaljenosti od 20 cm. Struktura staništa ima značajno veći uticaj na diverzitet prizemnih briofita u šumskim staništima u odnosu na karakteristike zemljišta, dok je na livadskimstaništima zabeležen obrnut slučaj. Najveći uticaj na diverzitet epifitskih briofita ima visina na stablu kao i tip forofite. Na istraživanom području je detektovano devet zajednica u prizemnoj brioflori šumskih staništa; šest epifitskih zajednica; pet zajednica na livadskim staništima; četiri zajednice na trulim deblima i panjevima; 10 zajednica na stenama i kamenju; četiri zajednice u potocima. Dobijeni rezultati predstavljaju građu za dalja briološka istraživanja, kako floristička tako i ekološka, i dopunu flore Srbije.In this research, the bryophyte flora of Fruška gora Mountain was analyzed. The aim of this research was to determine the diversity, distribution, microhabitat conditions and community structure of bryophytes on different types of habitats on Fruška Gora. Also, one of the goals was testing and optimization of the method for quantitative sampling of bryophytes on different types of habitats. Field research was carried out in the period 2013-2017. For the purposes of floristic research, field sampling was carried out using the transect method at 120 localities. Different variants of the "quadrat" method (method of nested quadrats for terrestrial bryophytes and the method of placing microplots at different distances for the epiphytic byphytes) were used for testing and optimization of methods for quantitative bryophyte sampling. Appropriate methods were selected on the basis species-area curve and similarity-area curve. Appropriate methods have been applied to further sampling in this study. On some localities (forest and meadow habitats) several environmental parameters (pH of soil and bark of wood, soil moisture, soil temperature, roof cover, coverage of herbaceous vascular plants, distance from the stream in forest habitats and distance of forest ecosystems in meadow habitats) were measured in order to determine their impact on the diversity and distribution of bryophytes. Bryophyte communities were identified on different substrates and habitat types using "label propagating community detection" analysis. The results of this study have shown that Fruška gora is an area characterized by a high diversity of bryophytes and a total number of 235 taxa were recorded (based on literature data and field research). 73 taxa were recorded for the first time on this area. Of the total number of taxa, 11% is threatened or under legislative protection. The microcenose method proved to be the most adequate for quantitative sampling of terrestrial bryophytes (with a minimum quadrat size of 0.5x0.5 m in forests and 1x1 m in meadow habitats). For the epiphytic bryophytes, the method of placing the microplots (10x10 cm) on all four sides of the tree at a distance of 20 cm is most suitable. The stand structure has a significantly greater influence on the diversity of terrestrial bryophytes in forest habitats compared to soil haracteristics, while in the meadow habitats there is a reverse case. The greatest influence on the diversity of epiphytic bryophytes has height on the tree as well as the type of phorphyte. In the investigated area, nine bryophyte communities were detected in ground bryopyhte flora of forest habitats; six epiphytic communities; five communities in meadow habitats; four communities on rotten trunks and horns; 10 communities on the rocks and stones; four communities in streams. The obtained results represent the base for further bryological research, both floristic and ecological, and the addition to the flora of Serbia.
50
Rousseau, Patrick. "Fidélité au site et à l'habitat chez le bruant à gorge blanche". Thesis, Université Laval, 2008. http://www.theses.ulaval.ca/2008/25650/25650.pdf.
Testo completoAbstract (sommario):
La niche écologique est souvent considérée comme étant une caractéristique propre à l’espèce ou à la population. Cependant, les individus d’une même espèce ne partagent généralement pas la même niche. Plusieurs études, portant principalement sur la diète alimentaire, ont déjà montré que certaines espèces dites généralistes sont en fait composées d’individus spécialistes n’utilisant qu’une portion de la niche globale de leur population. J’ai effectué une expérience visant à mesurer la spécialisation individuelle de la sélection des habitats chez le Bruant à gorge blanche (Zonotrichia albicollis; BRGB ou « bruants »), à la Forêt Montmorency, Québec. Des relevés par points d’écoute nous ont permis de confirmer que le BRGB fréquentait une vaste gamme d’habitats forestiers allant des parterres de coupe récents (< 1 an) aux peuplements matures feuillus et résineux riches et pauvres en lisières. Selon l’hypothèse de la spécialisation individuelle, les individus de cette espèce devraient être fidèles à un type précis de peuplement forestier. Des individus spécialistes devraient ainsi relocaliser leur territoire en cas de perturbation majeure, même si l’habitat suivant la perturbation demeure adéquat pour l’espèce. Nous avons comparé la fidélité interannuelle de bruants aux peuplements matures non soumis à des coupes forestières (sites témoins) à la fidélité aux peuplements matures soumis à des coupes totales effectuées durant l’hiver entre deux saisons de nidification (sites expérimentaux). Les sites expérimentaux étaient fréquentés par l’espèce dès les mois qui suivaient les coupes. Parmi les oiseaux retournés au site d’étude deux étés consécutifs, la fidélité au territoire des 14 mâles des sites expérimentaux était moins élevée que celle des 21 mâles des sites témoins (P = 0.01). La distance médiane de dispersion entre deux saisons de reproduction consécutives était deux fois plus élevée chez les mâles expérimentaux que chez les mâles témoins (P < 0.001). Aussi, plus leurs territoires originaux étaient coupés, plus les mâles des sites expérimentaux avaient tendance à s’éloigner de ceux-ci (P = 0.04). Bien que les nouveaux territoires des mâles expérimentaux étaient davantage coupés que leurs territoires originaux avant traitement (P = 0.02), leurs nouveaux territoires étaient tout de même moins coupés que l’emplacement de leurs territoires originaux après traitement (P = 0.04). Le gain en superficie non coupée dans les nouveaux territoires était correlé positivement avec la distance de dispersion des bruants expérimentaux (P = 0.03). Nous concluons que les BRGB n’utilisent individuellement qu’une partie de la niche écologique diversifiée de leur espèce. Il serait donc injustifié d’assumer que les individus d’une espèce ubiquiste sont versatiles et peu perturbés par les pratiques forestières en forêt boréale québécoise.The ecological niche is often considered as a species or population property. However, conspecific individuals may sometimes use contrasting parts of their species’ niche. As shown by many studies dealing with individual diet, generalist species are often composed of individual specialists that use only a subset of their population’s niche. I did an experiment to measure individual specialization in habitat selection of White-throated Sparrows (Zonotrichia albicollis; WTSP; “sparrows”) at Forêt Montmorency, Quebec. Point counts showed that the WTSP used a large range of habitats, from clearcuts (< 1 year) to mature mixed and coniferous stands with and without edges. According to the individual specialization hypothesis, individual WTSP should be faithful to a particular type of forest stand. In case of major disturbance, specialized individuals should relocate their territories even if the habitat resulting from the disturbance is suitable for the species. We compared between-year fidelity of sparrows to mature stands not affected by forest harvest (control sites) vs. fidelity to mature stands clearcut during the winter between two breeding seasons (experimental sites). Experimental sites were used by the species from the first months following the clearcut. Among all birds that returned two consecutive summers to the study site, territory fidelity of the 14 males from experimental sites was lower then that of the 21 males from control sites (P = 0.01). Median between-year breeding dispersal distance of experimental males was twice as large as that of control males (P < 0.001). The more the original territory was clearcut, the farther experimental males dispersed (P = 0.04). Experimental males’ new territories were more clearcut than their old territories before treatment (P = 0.02). However, their new territories were less clearcut than the location of their old territories after treatment (P = 0.04). Gain in uncut habitat in new territories was positively correlated with between-year breeding dispersal distance of experimental males (P = 0.03). We conclude that WTSP individually use only a subset of their species’ wide ecological niche. Therefore, it seems unjustified to assume that individuals from a generalist species are versatile and barely disturbed by silvicultural treatments in Quebec’s boreal forests.