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Tesi sul tema "Macro-Ecology"

Autore: Grafiati

Pubblicato: 27 luglio 2024

Ultima modifica: 31 luglio 2025

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1

Wahab, Md Abdul. "The ecology of benthic macro-invertebrates in earthen trout ponds at Howietoun, central Scotland." Thesis, University of Stirling, 1986. http://hdl.handle.net/1893/28840.

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An Investigation Into the ecology of benthic macro-invertebrates in earthen ponds subjected to intensive trout (Salmo trutta L.) culture practices at Howletoun, Central Scotland, was conducted between May 1984 and January 1986. Soil and water quality, seasonal changes in benthos, its role in the trout diet and the Interaction between fish and benthos were studied. Pond benthos mainly comprised 6 major groups including Oligochaeta. (10 species), Chironomldae (18 species), Molluscs and Hirudinea (2 species each) and an asellid and a sialid species. Oligochaeta formed 78 to 90% of benthic fauna,

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2

Mazel, Florent. "Comprendre et protéger la diversité des mammifères : une approche de biogéographie évolutive et fonctionnelle à l’échelle du globe." Thesis, Université Grenoble Alpes (ComUE), 2015. http://www.theses.fr/2015GREAV063/document.

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Les mammifères sont présents sur la surface terrestre depuis au moins le crétacé et ont colonisé l’ensemble des continents et des océans. Mon travail s’attache à comprendre la nature et l’importance relative des processus qui ont pu conduire à la répartition géographique actuelle des mammifères et notamment aux similarités faunistiques entre régions du globe. En décrivant les facettes phylogénétiques et fonctionnelles de la biodiversité des mammifères, j’adopte une approche résolument intégrative, à l’interface entre la biogéographie historique et la biogéographie fonctionnelle.À partir d’un t

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3

Washko, Susan. "The Macroinvertebrate and Fish Communities of In-Stream Beaver Ponds in Northeastern Utah." DigitalCommons@USU, 2018. https://digitalcommons.usu.edu/etd/7395.

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Beavers were virtually extirpated from North America during the fur trade, but populations have since recovered. Dams built by recolonizing beaver alter stream habitat by forming deep, slow ponds within the streams. Such changes to the habitat is likely to have consequences for organisms such as macroinvertebrates and fish. The objective of this study was to identify the differences in the macroinvertebrate and trout community in beaver ponds and lotic (e.g. flowing reaches of a stream) reaches in tributaries to the Logan River in northeastern Utah. The macroinvertebrate community of beaver po

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4

Philippe, Martin. "Perspectives multi-échelles de l'impact du chat domestique Felis catus sur la faune native." Electronic Thesis or Diss., université Paris-Saclay, 2024. http://www.theses.fr/2024UPASB025.

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L'impact de la prédation par le chat domestique, Felis catus, sur la biodiversité connait un essor croissant dans la recherche en écologie mais aussi dans le débat public. Les populations férales de chats domestiques ont eu des effets dévastateurs sur les écosystèmes insulaires et en Australie, provoquant des extinctions locales et globales d'espèces endémiques, soulevant des préoccupations majeures de conservation. En tant que carnivores obligatoires avec un régime alimentaire diversifié, ces populations de chats sont responsables de la disparition de nombreuses espèces appartenant à divers t

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5

Kriaučeliūnaitė, Kristina. "Makrofaunos (Lumbricidae) paplitimas agrofitocenozėse intensyvaus ūkininkavimo sąlygomis." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2006. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2006~D_20060607_164556-55484.

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In Magister work the spreading of macro fauna (Lumbricidae) in agrofitocenosis. Work object: research made in southwest Lithuania, Vilkaviškis region in the intensive agriculture farming in the hard granules ground. Aim of the work: to evaluate by field research southwest Lithuania hard granules soil macro fauna (Lumbricidae) spreading in agrofitocenosis depending on the kinds of growing plants, prior planting and hydrothermical regime. The methods of work: earthworm quantity was made digging 0,5 x 0,5m 2 and 0,25cm deep soil monolities and counting earthworms. By the research established that

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6

Chavy, Agathe Corinne. "Influence de l'environnement sur le cycle de transmission de la leishmaniose cutanée en Guyane, à multi-échelle spatiale Ecological niche modelling for predicting the risk of cutaneous leishmaniasis in the Neotropical moist forest biome Identification of French Guiana sand flies using MALDI-TOF mass spectrometry with a new mass spectra library « Regional scale ecological drivers of sandfly communities in French Guiana." Thesis, Guyane, 2019. http://www.theses.fr/2019YANE0013.

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Les cycles de transmission des maladies zoonotiques et les facteurs qui les influencent sont difficiles à déterminer, particulièrement lorsqu’ils sont dus à des agents pathogènes généralistes dépendant de plusieurs espèces hôtes et vectrices pour être transmis. De plus, perturbations anthropiques et changements climatiques exercent de fortes pressions sur les systèmes hôtes-pathogène-vecteurs pouvant modifier les cycles de transmission. Une approche globale à différentes échelles spatiales est alors nécessaire pour caractériser et quantifier l’importance relative de ses facteurs. Cette approch

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7

Schroeder, Gina. "Diversity investigations from the micro- to the macro-scale." Thesis, University of Ottawa (Canada), 2007. http://hdl.handle.net/10393/27918.

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Macroecology and experimental evolution are two disparate sub-disciplines with contrasting approaches to the study of biological diversity. First I use macroecology and the Global Invasive Species Database to determine the best predictors of diversity patterns of invasive species around the globe. I show that economic factors account for more of the variance in invasive species richness among countries than typical ecological variables used to explain broad-scale species diversity patterns. I then use a microecological approach in which experimental evolution is performed with the soil bacteri

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8

Coulibaly, Sekou Fanta Mady. "Effets des changements de pratiques agronomiques sur la diversité des vers de terre et collemboles- conséquences sur leurs fonctions associées." Thesis, Normandie, 2018. http://www.theses.fr/2018NORMR005/document.

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Le sol est une des composantes essentielles au soutien du fonctionnement de l’écosystème. Il est lesupport de la production primaire, un habitat pour la diversité biologique et remplit de nombreux processus écologiques. Les activités anthropiques, et parmi elles, les pratiques agricoles intensives, ont conduit à des déséquilibres au sein du sol causant un fort déclin de leur biodiversité. En réponse à ces effets, de nouvelles pratiques agricoles ont été développées pour préserver les sols et les services écosystémiques qu’ils fournissent. Ces pratiques dites innovantes s’appuient principalemen

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9

Yguel, Benjamin. "Sortir de sa niche ancestrale : conséquences pour les interactions trophiques, le cas du chêne pédonculé et sessile." Phd thesis, Université Rennes 1, 2012. http://tel.archives-ouvertes.fr/tel-00793651.

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Le conservatisme phylogénétique de niche se définit par la conservation, au cours du temps, de la niche écologique et des traits écologiques associés. Des espèces phylogénétiquement proches auront alors tendances à occuper des niches similaires, incluant des conditions abiotiques mais aussi des interactions biotiques similaires. Ainsi, un individu isolé phylogénétiquement de ses voisins, pourrait être considéré comme présent dans une nouvelle niche. Dans cette thèse, nous nous sommes intéressés aux interactions trophiques des individus de plantes hôtes colonisant une nouvelle niche, représenté

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10

Bigsby, Ewan. "The interactions between the macro-invertebrates, fish and diving ducks of Lough Neagh, Northern Ireland." Thesis, University of Ulster, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.232855.

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11

Cowley, C. "The influence of road runoff on the benthic macro-invertebrates of an unpolluted chalk stream." Thesis, University of Westminster, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.354965.

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12

Pettersson, Siri. "Makrofossilanalys som ekologiskt verktyg : En metodutvärdering." Thesis, Uppsala universitet, Institutionen för biologisk grundutbildning, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-321511.

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Approximately 50 percent of all endangered species in Scandinavia are associated with old agricultural landscapes. During the agricultural industrialization of the past century the traditional practices and methods that created these environments have been phased out. This has brought on a serious decline and fragmentation of biomes that many endangered species depend on. Knowledge of traditional agricultural landscapes and their species dynamics is needed to make well informed decisions regarding their care and restoration. One way to acquire such knowledge is to study fossil plant remnants f

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13

Vanden, Bossche Jean-Pierre. "Typologie et qualité biologique du réseau hydrographique de Wallonie basées sur les assemblages des macroinvertébrés." Doctoral thesis, Universite Libre de Bruxelles, 2005. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/210955.

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<p align="justify"><i>Typologie des cours d’eau en Wallonie et caractérisation par la faune invertébrée</i><br>Vingt-cinq types de cours d’eau ont été définis en Wallonie d’après les termes de la Directive Cadre pour l’Eau en tenant compte des facteurs obligatoires et optionnels rassemblés sous trois critères :la taille (du « ruisseau » à la « très grande rivière »), la pente (faible, moyenne et forte), et cinq régions naturelles (la région limoneuse, le Condroz, la Famenne, l’Ardenne et la Lorraine belge, résumant les facteurs obligatoires altitude, latitude, longitude et géologie). Une appro

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14

Fisher, Ruth-Mary Corne. "The impacts of channelisation on the geomorphology and ecology of the Kuils River, Western Cape, South Africa." University of Western Cape, 2003. http://hdl.handle.net/11394/7484.

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>Magister Scientiae - MSc<br>Urbanisation and storm water input in the Kuils River catchment changed the flow of the river from ephemeral to perennial. This led to flooding problems in the Kuilsrivier central business district. The river was channelised in 2000 to increase the carrying capacity of the channel and thus to reduce the flood risk. This study aims to monitor the impacts of channelisation on the geomorphology and ecology of the Kuils River. This was done by selecting representative study sites upstream, within and downstream of the channelised reach. The geomorphological and e

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15

Abolaffio, Milo. "How Turbulence affects living systems? From micro to macro-scales." Doctoral thesis, Università degli studi di Padova, 2017. http://hdl.handle.net/11577/3422795.

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In this thesis, we study from a physics perspective three problems related to how turbulence affects living systems. The first problem is an aim to quantify how turbulence changes the uptake of nutrients of micro-organisms, using analytical and numerical simulations. The second problem is a quantification of the relationship between the marine turbulence level depicted as the mixed layer depth and the distribution of foraging points of pelagic birds while the third problem is a verification of the theory of olfactory cued navigation in pelagic birds. In the latter we used calculation from turb

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16

Marzin, Anahita. "Indicateurs biologiques de la qualité écologique des cours d'eau : variabilités et incertitudes associées." Phd thesis, AgroParisTech, 2013. http://pastel.archives-ouvertes.fr/pastel-00879788.

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Evaluer, maintenir et restaurer les conditions écologiques des rivières nécessitent des mesures du fonctionnement de leurs écosystèmes. De par leur complexité, notre compréhension de ces systèmes est imparfaite. La prise en compte des incertitudes et variabilités liées à leur évaluation est donc indispensable à la prise de décision des gestionnaires. En analysant des données nationales (~ 1654 sites), les objectifs principaux de cette thèse étaient de (1) tester certaines hypothèses intrinsèques aux bio-indicateurs et (2) d'étudier les incertitudes de l'évaluation écologique associées à la var

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17

Andrews, Claire Elizabeth. "The measurement of the erosion of the chalk shore platform of East Sussex, the effect of coastal defence structures and the efficacy of macro scale bioerosive agents, in particular the common." Thesis, University of Sussex, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.340824.

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18

AYO-BALI, ABIODUN Emmauel. "Geochemical Analysis of the Environmental Phases of La Barra de Santiago Estuary, El Salvador." Ohio University / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1556804693894507.

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19

Bredenhand, Emile. "Evaluation of macro-invertebrates as bio-indicators of water quality and the assessment of the impact of the Klein Plaas dam on the Eerste River." Thesis, Stellenbosch : University of Stellenbosch, 2005. http://hdl.handle.net/10019.1/2630.

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Thesis (MScAgric (Conservation Ecology and Entomology)--University of Stellenbosch, 2005.<br>A semi-arid country, like South Africa, with unpredictable seasonal rainfall, is subject to great scarcity in water and an ever-increasing demand from the rising human population. Therefore, efficient reservoirs as well as monitoring methods are needed to manage the South African water supply. This study was undertaken on the Eerste River in the Western Cape, South Africa, focusing on the impact of the Klein Plaas dam system on the benthic macroinvertebrates. The study also examined the use of be

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20

Suriani, Ana Lucia. "A estrutura da comunidade de macro-invertebrados bentônicos em três represas do médio rio Tietê (SP), com ênfase nas espécies exóticas Melanoides tuberculata (Gastropoda, Thiaridae) e Corbicula fluminea (Bivalvia, Corbiculidae)." Universidade Federal de São Carlos, 2006. https://repositorio.ufscar.br/handle/ufscar/1897.

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Made available in DSpace on 2016-06-02T19:31:34Z (GMT). No. of bitstreams: 1 DissALS.pdf: 2333068 bytes, checksum: cdcfee1bad9d14e51961d064d78ac179 (MD5) Previous issue date: 2006-02-24<br>Universidade Federal de Sao Carlos<br>The reservoirs are artificial ecosystems constructed by the man and attend to the multiple uses. The reservoir provokes alterations in the aquatic ecosystem, causing modifications in the chemical and physical composition of the sediment and of the water and consequently in the circulation and the organization of the biological communities. The purpose of this study was

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21

Hedde, Mickael. "Etude de la relation entre la diversité des macro-invertébrés et la dynamique de la matière organique des sols limoneux de Haute-Normandie." Phd thesis, Université de Rouen, 2006. http://tel.archives-ouvertes.fr/tel-00543169.

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L'objectif de ce travail est d'étudier les relations entre la diversité des macro-invertébrés détritivores et la dynamique de la matière organique (MO) dans les sols limoneux des plateaux de Haute-Normandie. Ce travail vise à répondre à deux hypothèses : (H1) la biodiversité et les MO du sol sont influencées par les modifications environnementales induites par les gestions agricole et forestière et (H2) les assemblages de macro-détritivores influencent la dynamique de la MO du sol. Les systèmes étudiés incluent une culture intensive et des prairies d'âge croissant (0,5 à 33 ans), ainsi que des

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22

Marzin, Anahita. "Indicateurs biologiques de la qualité écologique des cours d’eau : variabilités et incertitudes associées." Thesis, Paris, AgroParisTech, 2013. http://www.theses.fr/2013AGPT0002/document.

Testo completo

Abstract (sommario):

Evaluer, maintenir et restaurer les conditions écologiques des rivières nécessitent des mesures du fonctionnement de leurs écosystèmes. De par leur complexité, notre compréhension de ces systèmes est imparfaite. La prise en compte des incertitudes et variabilités liées à leur évaluation est donc indispensable à la prise de décision des gestionnaires. En analysant des données nationales (~ 1654 sites), les objectifs principaux de cette thèse étaient de (1) tester certaines hypothèses intrinsèques aux bio-indicateurs et (2) d'étudier les incertitudes de l'évaluation écologique associées à la var

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23

Pérès, Guénola. "Identification et quantification in situ des interactions entre la diversité lombricienne et la macro-bioporosité dans le contexte polyculture breton. Influence sur le fonctionnement hydrique du sol." Phd thesis, Université Rennes 1, 2003. http://tel.archives-ouvertes.fr/tel-00007432.

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Le sol, support entre autre de production végétal, peut être considéré comme un système interactif au sein du quel les composantes physiques (structure du sol), chimiques (solution du sol, matière organique) et biologiques (faune et flore) sont en étroites relations. Replacé dans un contexte plus global, ce système peut être soumis à des contraintes anthropiques qui, devenant trop importantes, sont susceptibles de perturber son fonctionnement. Comprendre le fonctionnement du sol, suggère donc de connaître chacun de ses composants, ainsi que les interactions entre ces composants, tout en intégr

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24

Burfeid, Castellanos Andrea Montserrat. "Ecological factors and diatom diversity at rivers of the iberian mediterranean river basins: macro-scale, meso-scale and micro-scale = Factores ecológicos y diversidad de diatomeas en los ríos de las cuencas hidrográficas del Mediterráneo ibérico: maro-escala, meso-escala y micro-escala." Doctoral thesis, Universitat de Barcelona, 2018. http://hdl.handle.net/10803/663475.

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Benthic diatoms, photoautotrophic, silicate plated, single-celled aquatic organisms dwelling on substrates, have been used in bioindication, since they are good indicators of ecological water state. In this thesis, we have used a multi-scalar approach to observe how diatoms from Spanish Mediterranean rivers are affected by the characteristics of the habitats they live in. These organisms were observed under a taxonomic-indicative, functional-grouped and morphometric prism. The samples stem from Mediterranean rivers pertaining to either the Ebro Basin, or jurisdictions of the Catalan rivers or

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25

Ruby, Margaret E. "Forest macro-arthropods as potential indicators of ecosystem conditions in Western Idaho : an analysis of community composition, biological diversity, and community structure /." 2001. http://hdl.handle.net/1957/11060.

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26

"An assessment of the effects of small-scale farming on macro-invertebrate and diatom community structure in the Vhembe District, Limpopo." Thesis, 2015. http://hdl.handle.net/10210/13838.

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M.Sc. (Zoology)<br>The Limpopo Province covers an area of 12.46 million hectares and these accounts for 10.2 per cent of the total land area of the Republic of South Africa. The province is endowed with abundant agricultural resources and it is one of the country’s prime agricultural regions noted for the production of fruits and vegetables, cereals, tea, and sugar. A key feature of the agricultural industry of Limpopo Province is its dualism. There are two distinct types of agricultural production systems. The large scale commercial farming system occupies approximately 70% of the total land

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27

Foster, Lee-Ann Sade. "The effect of water and sediment quality on macro-invertebrate communities from selected endorheic pans." Thesis, 2014. http://hdl.handle.net/10210/11326.

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M.Sc. (Environmental Management)<br>Wetlands play a significant role in our environment as they provide a variety of goods, services and benefits to living species ranging from humans, animals and plants to microorganisms. Despite their importance, wetlands have somewhat been neglected over the past few years which has led to a rapid deterioration of wetland conditions and functions. Wetlands provide unique functions that cannot be provided by any other ecosystem; their value was recognised in the 1960s. Prior to this realisation the value of wetlands had been seriously underestimated to the e

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28

Reynard, Jerome Peter. "Macro-faunal exploitation in the Cape Floral Region (Fynbos Biome) of the southern Cape, South Africa c. 75-60 ka: case studies from Blombos Cave and Klipdrift Shelter." Thesis, 2016. http://hdl.handle.net/10539/21640.

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A thesis submitted to the Faculty of Science, University of the Witwatersrand, Johannesburg, in fulfilment of the requirements for the degree of Doctor of Philosophy. 2016<br>The analysis of faunal remains from archaeological sites can reveal much about past behaviour, palaeoenvironments and bone technology. This is especially pertinent for the Middle Stone Age (MSA): a period that corresponds to both the behavioural and anatomical development of Homo sapiens. In this thesis, I examine the faunal remains from Blombos Cave (BBC) and Klipdrift Shelter (KDS), two significant MSA sites about

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29

Diedericks, Gerhardus Johannes. "The influence of run-off from road networks on aquatic macro-invertebrates in Mamatole commercial tree plantation (Komatiland Forests), Upper Letsitele Catchment, Limpopo Province, South Africa." Thesis, 2012. http://hdl.handle.net/10210/6305.

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M.Sc.<br>The purpose of this study was to determine whether unpaved roads in commercial forests have a detrimental impact on aquatic macro-invertebrates in the receiving rivers associated with these roads. The upper section of the headwaters of the Motlhaka-Semeetse River was chosen as the Study Area because a portion is situated in the Wolkberg Wilderness area (natural area with no roads) and a portion in a commercial forestry plantation (high road network density). Stream conditions based on a rapid bio-assessment of aquatic macro-invertebrates using SASS5 were then compared between the two

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Nel, Jacoba Elizabeth. "Ontwikkeling van 'n reflekterende span met 'n ekosistemiese benadering tot gesinsterapie." Diss., 1999. http://hdl.handle.net/10500/15600.

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Afrikaans text<br>Besorgdheid het in die gemeenskap bestaan oar die toenemende getalle kinders wat binne die stedelike konteks van Pretoria op straat leef en werk. Hierdie navorsing is onderneem om die behoeftes van die kinders aan te spreek en om alternatiewe wyses te vind om met hulle te werk. 'n Konteks is geskep sodat na hulle stemme geluister kon word. nag 'n alternatief tot "tradisionele" vorme van gesinsterapie bruikbaar is, op sekere voorwaardes, soos aangedui in hoofstuk vier. Sleutelwoorde: reflekterende span; "straatkinders"; ekosistemiese benadering; ekologie

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