Dissertations / Theses on the topic 'Terrestrial biodiversity'
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Chu, Wing-hing, and 朱永興. "Conservation of terrestrial biodiversity in Hong Kong." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1998. http://hub.hku.hk/bib/B31215191.
Full textChu, Wing-hing. "Conservation of terrestrial biodiversity in Hong Kong /." Hong Kong : University of Hong Kong, 1998. http://sunzi.lib.hku.hk/hkuto/record.jsp?B19737439.
Full textNatus, Inar Rosmayati. "Biodiversity and endemic centres of Indonesian terrestrial vertebrates." [S.l.] : [s.n.], 2005. http://deposit.ddb.de/cgi-bin/dokserv?idn=977856852.
Full textPlenzler, Michael A. "Terrestrial Influences on the Macroinvertebrate Biodiversity of Temporary Wetlands." Bowling Green State University / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1355081524.
Full textAlizadeh, Shabani Afshin, and afshin alizadeh@rmit edu au. "Identifying bird species as biodiversity indicators for terrestrial ecosystem management." RMIT University. Mathematical and Geospatial Sciences, 2006. http://adt.lib.rmit.edu.au/adt/public/adt-VIT20061116.161912.
Full textYip, Yin, and 葉彥. "A spatial analysis of the terrestrial biodiversity of Hong Kong." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2002. http://hub.hku.hk/bib/B29760744.
Full textFriedman, Scott Lawrence. "Mercury Exposure in Terrestrial Insectivorous Birds." W&M ScholarWorks, 2007. https://scholarworks.wm.edu/etd/1539626858.
Full textKimble, Matthew Sidney. "Variation of aquatic and terrestrial riparian biodiversity in response to watershed condition /." Thesis, Connect to this title online; UW restricted, 1999. http://hdl.handle.net/1773/5527.
Full textSchmidtke, Andrea. "Biodiversity effects on the performance of terrestrial plant and phytoplankton communities." Phd thesis, Universität Potsdam, 2009. http://opus.kobv.de/ubp/volltexte/2009/3893/.
Full textTo date, positive relationships between diversity and community biomass have been mainly found, especially in terrestrial ecosystems due to the complementarity and/or dominance effect. In this thesis, the effect of diversity on the performance of terrestrial plant and phytoplankton communities was investigated to get a better understanding of the underlying mechanisms in the biodiversity-ecosystem functioning context. In a large grassland biodiversity experiment, the Jena Experiment, the effect of community diversity on the individual plant performance was investigated for all species. The species pool consisted of 60 plant species belonging to 4 functional groups (grasses, small herbs, tall herbs, legumes). The experiment included 82 large plots which differed in species richness (1-60), functional richness (1-4), and community composition. Individual plant height increased with increasing species richness suggesting stronger competition for light in more diverse communities. The aboveground biomass of the individual plants decreased with increasing species richness indicating stronger competition in more species-rich communities. Moreover, in more species-rich communities plant individuals were less likely to flower out and had fewer inflorescences which may be resulting from a trade-off between resource allocation to vegetative height growth and to reproduction. Responses to changing species richness differed strongly between functional groups and between species of similar functional groups. To conclude, individual plant performance can largely depend on the diversity of the surrounding community. Positive diversity effects on biomass have been mainly found for substrate-bound plant communities. Therefore, the effect of diversity on the community biomass of phytoplankton was studied using microcosms. The communities consisted of 8 algal species belonging to 4 functional groups (green algae, diatoms, cyanobacteria, phytoflagellates) and were grown at different functional richness levels (1-4). Functional richness and community biomass were negatively correlated and all community biomasses were lower than their average monoculture biomasses of the component species, revealing community underyielding. This was mainly caused by the dominance of a fast-growing species which built up low biomasses in monoculture and mixture. A trade-off between biomass and growth rate in monoculture was found for all species, and thus fast-growing species built up low biomasses and slow-growing species reached high biomasses in monoculture. As the fast-growing, low-productive species monopolised nutrients in the mixtures, they became the dominant species resulting in the observed community underyielding. These findings suggest community overyielding when biomasses of the component species are positively correlated with their growth rates in monocultures. Aquatic microcosm experiments with an extensive design were performed to get a broad range of community responses. The phytoplankton communities differed in species diversity (1, 2, 4, 8, and 12), functional diversity (1, 2, 3, and 4) and community composition. The species/functional diversity positively affected community biomass, revealing overyielding in most of the communities. This was mainly caused by a positive complementarity effect which can be attributed to resource use complementarity and/or facilitative interaction among the species. Overyielding of more diverse communities occurred when the biomass of the component species was correlated positively with their growth rates in monoculture and thus, fast-growing and high-productive species were dominant in mixtures. This and the study mentioned above generated an emergent pattern for community overyielding and underyielding from the relationship between biomass and growth rate in monoculture as long as the initial community structure prevailed. Invasive species can largely affect ecosystem processes, whereas invasion is also influenced by diversity. To date, studies revealed negative and positive diversity effects on the invasibility (susceptibility of a community to the invasion by new species). The effect of productivity (nutrient concentration ranging from 10 to 640 µg P L-1), herbivory (presence/absence of the generalist feeder) and diversity (3, 4, 6 species were randomly chosen from the resident species pool) on the invasibility of phytoplankton communities consisting of 10 resident species was investigated using semi-continuous microcosms. Two functionally diverse invaders were chosen: the filamentous and less-edible cynaobacterium C. raciborskii and the unicellular and well-edible phytoflagellate Cryptomonas sp. The phytoflagellate indirectly benefited from grazing pressure of herbivores whereas C. raciborskii suffered more from it. Diversity did not affect the invasibility of the phytoplankton communities. Rather, it was strongly influenced by the functional traits of the resident and invasive species.
Sporne, Ilva. "Institutional Dimension of Biodiversity Conservation." Thesis, Griffith University, 2015. http://hdl.handle.net/10072/367591.
Full textThesis (PhD Doctorate)
Doctor of Philosophy (PhD)
Griffith School of Environment
Science, Environment, Engineering and Technology
Full Text
McInnes, Sandra J. "Taxonomy, biodiversity and biogeography : Tardigrada and Antarctic meiofauna." Thesis, Anglia Ruskin University, 2010. http://arro.anglia.ac.uk/216030/.
Full textMcInnes, Sandra J. "Taxonomy, biodiversity and biogeography: Tardigarda and Antarctic meiofauna." Thesis, Anglia Ruskin University, 2010. https://arro.anglia.ac.uk/id/eprint/216030/1/McInnes_Thesis_2010.pdf.
Full textThiere, Geraldine. "Biodiversity and ecosystem functioning in created agricultural wetlands." Doctoral thesis, Högskolan i Halmstad, Våtmarkscentrum, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-2968.
Full text[Paper II] Milenkovski S., Thiere G., Weisner S.E.B., Berglund O. & Lindgren P.-E. Variation of eubacterial and denitrifying bacterial biofilm communities among constructed wetlands. Submitted manuscript. [Paper V] Thiere G. & Weisner S.E.B. Influence of biotic and abiotic parameters on ecosystem functioning of created wetlands. Manuscript.
Hotaling, Scott. "GENETIC PERSPECTIVES ON BIODIVERSITY IN ROCKY MOUNTAIN ALPINE STREAMS." UKnowledge, 2017. http://uknowledge.uky.edu/biology_etds/44.
Full textSvennar, Erica. "Metoder för att undersöka effekterna av naturvårdshänsynen i skogsbruket efter den nya skogsvårdslagen." Thesis, Linköping University, Linköping University, Ecology, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-57275.
Full textIn 1994 a new Forestry Act was accepted in Sweden. One of its aims was to raise the consideration for preservation of biodiversity. Since this happened over 15 years ago there is now an interest in analyzing if the law has been effective in its purpose. In this study methods suitable for analysis are being investigated. The study contents a pilot study of methods for five parameters that can validate if the law has been followed. The fieldstudy were executed in Orsa, Dalarna, Sweden in a managed forest and where last clearcut was done after 1994. The work consisted of measuring the parameters in the field and to compare them with data from before 1994. The benefits of the parameters and the current and previous Forestry Act and their differences are discussed in the report. The parameters examined were the distribution of tree species, standing dead wood, smaller areas saved for preservation, big trees and trees with cavities/cavernous trees. All of these plus a few other variables favourable for the diversity of species in the forest are dealt with in the 30 § in the Forestry Act of 1994. The study implied that the variables reported to be favourable for biodiversity, and possible to investigate within the restrictions of this study, seemed to have increased. The results should however be interpreted with care since the study is small and the reference values sometimes were missing or covering larger areas than the field data.
Schäfer, Martina. "Mosquitoes as a Part of Wetland Biodiversity." Doctoral thesis, Uppsala universitet, Populationsbiologi, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-4670.
Full textNorström, Paananen Marcus, Magnus Boström, and Christian Ahlgren. "Power Lines - Wasteland or Biodiversity Hotspots?" Thesis, Mälardalen University, School of Sustainable Development of Society and Technology, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-4541.
Full textDet svenska kulturlandskapet har förändrats radikalt under de senaste 200 åren från ett varierat och heterogent landskap till ett mer monotont, homogeniserat landskap som följd av att olika former av mänskligt resursutnyttjande har effektiviserats. Detta har lett till en fragmentering av livsmiljöerna för flera av kulturlandskapets arter. Kraftledningsgator kan tänkas hysa naturtyper som påminner om vissa av de nu försvunna eller fragmenterade livsmiljöerna (t ex betad skogsmark och vissa typer av ängsmarker) och skulle kunna ha en viktig betydelse som reträttplats och/eller spridningskorridor för dessa arter.
I en fallfällsinventering i Köpings och Strängnäs kommun i Mälardalen undersöktes förekomst och abundans av marklevande evertebrater i kraftledningsgator, skog och betesmark. Jämförelser i förekomst och abundans gjordes mellan dessa marktyper (d v s kraftledningsgator, skog och betesmark), samt mellan positioner inom kraftledningsgator (centrala och distala delar) och närliggande skogsmark. Jämförelserna innefattade dels analyser av artantal (eller snarare antal taxa) och flera olika biodiversitetsindex och dels analyser av likhet i artförekomst och individantal med "likhetsindex" (similarity index). Separata analyser gjordes inom olika taxonomiska grupper (t ex alla taxa, endast inom insekter, endast inom spindeldjur). Antalet replikat tillät statistisk testning av eventuella mönster i antal taxa och biodiversitetsindex.
Inga signifikanta skillnader dokumenterades, varken mellan de olika marktyperna eller mellan positioner inom kraftledningsgator och närliggande skog. Vi tolkar dessa resultat som att kraftledningsgator med avseende på antal taxa respektive biodiversitet inte är (signifikant) sämre än skogs- eller betesmark. Det kan betonas att det inte heller fanns något konsekvent (icke-signifikant) mönster som pekade på att så skulle vara fallet. Antal taxa och biodiversitetsindex tar ingen hänsyn till vilka arter eller taxa som ingår i analyserna. En naturtyp som hyser en individ- och artrik fauna bestående av oönskade arter (introducerade arter, "skadedjur" etc.) registrerar t ex ett högre biodiversitetsindex än en naturtyp med fåtaligt förekommande rödlistade, skyddsvärda arter. Likhetsindex belyser bättre vilka arter som är inblandade. Visserligen tas inte heller här hänsyn till exakt vilka arter som ingår (eller deras eventuella önskvärdhet eller skyddsvärde), men ett högt index indikerar att samma arter förekommer i de jämförda naturtyperna. I denna studie indikerar ett högt likhetsindex dessutom att antalet individer av de inblandade arterna är likartat, eftersom ett index som tar hänsyn till abundans användes.
Resultaten visade överlag höga likhetsindex, speciellt verkade kraftledningsgator och skogsmark hysa likartad evertebratfauna medan likheten mellan kraftledningsgator och betesmark var mindre uttalad. Sammanfattningsvis indikerar studien att kraftledningsgator inte verkar vara lågvärdiga livsmiljöer för de marklevande evertebrat-taxa som ingått i studien. Vi föreslår att kraftledningsgator med väl avvägda rutiner för röjning och skötsel skulle kunna spela en viktig roll i skapandet av artrika kantzoner eller marker som liknar ängs- eller betesmarker med svag hävd.
As a consequence of the intensification of various forms of human resource utilization rural Sweden has changed radically over the past 200 years from offering a varied and diverse landscape to a more monotonous, homogenised type of environment. This has led to fragmentation of habitats for many of the species occurring. Power line corridors might harbour habitats that resemble some of the now lost or fragmented habitats (e.g. grazed forest land and certain types of meadow), and could have important functions as refuge habitats and / or distribution corridors for these species.
In a pitfall trap study in Köping and Strängnäs municipalities in Mälardalen, the occurrence and abundance of ground-living invertebrates were investigated in power line corridors, adjoining forest and pastures. Comparisons were made between these habitat types, and between positions within the power line corridor (central and distal parts) and the nearby forested area. The comparisons included analysis of number of species (or rather the number of taxa) and several biodiversity indexes, as well as analysis of the similarity of the occurrence of certain species and individual numbers by use of "similarity index". Separate tests were made in different taxonomic groups (e.g. all taxa, only within insects, only within spiders). The number of replicates allowed statistical testing of patterns in the number of taxa and biodiversity index.
No significant differences were documented, neither between the different habitat types, nor between positions in the power line corridors and nearby forest. There was also no consistent (non-significant) pattern indicating that this would be the case. We suggest these results to indicate that power line corridors at least are not (significantly) poorer quality habitats than are forest or pasture land with regard to number of taxa and biodiversity. Number of taxa and biodiversity indices take no account of the species or taxa included in the analysis. Thus the same weight is assigned to an unwanted species (e.g. an invasive pest species or parasite) as to a red-listed, highly valued species. Similarity index takes more heed to the species involved. Although similarity indices do not consider the exact identity of involved species (or their possible value or desirability), a high index value indicates that the same species occur in the compared habitats. In this study, where an index that takes into account the abundance of species was used, a high similarity index value also indicates that the numbers of individuals are similar.
Overall, the results showed high similarity between habitat types. This would suggest that, to a large extent, power lines, forest and pasture land had the same composition of taxa, and that the taxa had similar abundances. Power lines and forest seemed to exhibit particularly high similarities, whereas the similarity between power lines and pasture land was less pronounced. Thus, this study indicates, in contrast to several previous suggestions, that power line corridors do not seem to be low quality habitats. We also suggest that power line corridors with well designed management routines could play an important role creating edges and habitats resembling meadow or low intensity grazed pasture land.
Huang, Qiuyuan. "Geomicrobial Investigations on Extreme Environments: Linking Geochemistry to Microbial Ecology in Terrestrial Hot Springs and Saline Lakes." Miami University / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=miami1399305277.
Full textFraj-Lagha, Mehdia. "Biodiversité des arthropodes dans les agroécosystèmes. Application à l'échelle de la basse vallée Majerda en Tunisie." Thesis, Poitiers, 2013. http://www.theses.fr/2013POIT2266/document.
Full textIn Tunisia, few studies on the macrofauna and species diversity of terrestrial isopods in the agroecosystems were performed. To fill this gap, the spatio-tempral (plots, sectors and season) diversity of macrofauna and Oniscidea was analysed. We studied the distribution of Isopods in Majerda agroecosystems related to cultivation types (orchards, market gardening, vegetable crops), irrigations systems (sprinkler, surface and drip) and soil physico-chemical characteristics. Sampling was carried out with pitfalls traps during in 15 plots during 2008-2009 and 11 plots during 2009-2010. Nineteen groups of macrofauna was found. Coleoptera, Oniscidea, Hymenoptera, Diptera, Othoptera and Aranea were the most present and abundant. Isopods were abundant in autum in the vegetable crops cultivation. In the coastal plots (Ghar El Melh sector) diversity was higher than in the terrestrial plots (Utique sector). Nine species of terrestrial isopods belonging to 6 genera were identified. Porcellio laevis was the most frequent species in all seasons. According to cultivation types, the number of individuals and the species richness were important in vegetable crops and barely cultivation. The spatial distribution of Oniscidea showed that isopods were abundant in the plots of Pont of Bizerte irrigated by sprinkler systems and wastewater. Year factor affected the diversity of fauna and isopods. Oniscidea species distribution was correlated to conductivity, texture and the content of Mg2+ Ca2+ and K+ of soil
Wallin, Jakob. "Plant-pollinator networks in three habitats on a baltic island." Thesis, Högskolan på Gotland, Institutionen för kultur, energi och miljö, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:hgo:diva-1009.
Full textPrisner-Levyne, Yann. "La protection de la faune sauvage terrestre en droit international public." Thesis, Paris 1, 2017. http://www.theses.fr/2017PA01D086/document.
Full textTerrestrial wildlife is actually facing a sixth mass extinction which is mostly anthropogenic contrary to past mass extinctions. After the international community took notice of the problem in the 70s, an increasing number of legal instruments were adopted in order to protect terrestrial wildlife worldwide. Yet, wildlife populations continued to decline. Through this terrible assessment, it is the efficiency of the international legal regime of wildlife protection which needs to be questioned and scrutinized.The crux of the problem lies in the fact that terrestrial wildlife is considered as a natural resource. As such, each State has jurisdiction to manage, exploit, deplete, or even destroy wildlife resources located on their territory pursuant to the principle of permanent sovereignty over natural resources. However, this principle is in contradiction with ecological and biological realities Indeed, terrestrial fauna, apart from the fact that it may move from one State to the other, is involved in the maintenance of ecosystems and other complex biological processes which effects are felt way outside the borders of a single State. As a result, the exploitation of wildlife resources in one State can have dire consequences on the environment of other States. As such, sovereignty over wildlife resources cannot be absolute which the principle of good neighbourliness imperfectly captures. Yet, it appears that the application of this principle in the context of the conservation of wildlife resources raises a certain number of uncertainties due to the difficulty to translate in legal terms the complexities of the ecological processes involved. Consequently, terrestrial wildlife should not be regulated by the same legal regime as the one applicable to extractive resources which are invariably located within the borders of a single State and are not part of any transnational ecological process. Maybe would it be more relevant to apply a legal regime similar to the one applicable to international waterways, most of them are considered as de facto shared resources implying a regime of common management between Riverine States without their respective sovereignty being challenged in any way. Yet this solution is not the one that prevails under international law as far as wildlife resources are concerned. The actual regime is entirely built around the principle of terrestrial sovereignty over natural resources where each State is responsible for implementing its international obligations in its own territory. [...]
Hylander, Kristoffer. "Living on the edge : effectiveness of buffer strips in protecting biodiversity in boreal riparian forests /." Doctoral thesis, Umeå : Univ, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-233.
Full textSpiegel, Molly. "Experimental proposal to determine the spatial significance and location choice on the regrowth of Solemosmilia variabilis in an MPA network versus a large reserve model." Scholarship @ Claremont, 2015. http://scholarship.claremont.edu/scripps_theses/623.
Full textFearon, Janine Lee. "The genetic diversity and conservation biology of the rare terrestrial snail genus Prestonella." Thesis, Rhodes University, 2011. http://hdl.handle.net/10962/d1003760.
Full textCordeiro, Juliana de Carvalho. "Diagnóstico da biodiversidade de vertebrados terrestres de Sergipe." Universidade Federal de Sergipe, 2008. https://ri.ufs.br/handle/riufs/4213.
Full textA dissertação é um diagnóstico da biodiversidade dos vertebrados terrestres da região de Sergipe. Para cada grupo taxonômico foram obtidas informações sobre a distribuição geral e regional das espécies, conservação e espécies de ocorrência esperada. O modelo dos domínios morfoclimáticos foi adotado como unidade geográfica para determinar as distribuições das 547 espécies. A maioria das 45 espécies de anfíbios está amplamente distribuída em todos os domínios, 11 são restritas à mata atlântica. Duas espécies de Phyllomedusa estão ameaçadas localmente, quase todas as 39 espécies esperadas ocorrer são restritas à mata atlântica. As 57 espécies de répteis são compostas principalmente por lagartos e serpentes amplamente distribuídas em todos os domínios, 11 são restritas à mata atlântica e caatinga. Duas espécies de lagartos do gênero Cnemidophorus são endêmicas e 4 têm distribuição localizada; aproximadamente 30 espécies de répteis são esperadas ocorrer. Com relação às 387 espécies de aves, 14 são restritas à mata atlântica e 2 à caatinga. O albatroz Thalassarche melanophris tem distribuição localizada e o passeriforme Herpsilochmus pectoralis está na lista de ameaçados. Aproximadamente 450 espécies de aves são esperadas ocorrer, 95 ameaçadas. A maioria das 36 espécies de mamíferos não voadores, mais 22 morcegos, é da mata atlântica e caatinga ou tem distribuição mais ampla. Nas listas de conservação estão o morcego Chiroderma doriae da mata atlântica, os macacos guigós Callicebus coimbrai da mata e C. barbarabrownae da caatinga, e o macaco-prego Cebus xanthosternos. As espécies de mamíferos de provável ocorrência são 124, endêmicas da caatinga 3, da mata atlântica 4. São apresentados comentários sobre áreas de mata atlântica e caatinga para futuros estudos ecológicos e inventários sobre biodiversidade.
Eluvathingal, Lilly M. "An Ecological Study of the Anurans in Tea Plantations in a Biodiversity Hotspot." FIU Digital Commons, 2016. http://digitalcommons.fiu.edu/etd/3029.
Full textBerglund, Håkan. "Biodiversity in fragmented boreal forests : assessing the past, the present and the future." Doctoral thesis, Umeå University, Ecology and Environmental Science, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-220.
Full textThe aims of this thesis are to (1) analyze the predictability (indicators) of plant and fungal species diversity in old-growth forests, and (2) assess the history and biodiversity of woodland key habitats (WKHs) and their potential to maintain species diversity in fragmented boreal forest landscapes.
Predictability was explored in Granlandet nature reserve, an unexploited landscape composed of discrete old-growth Picea forest patches of varying size isolated by wetland, reflecting conditions of insular biota at stochastic equilibrium. Data from 46 patches (0.2-12 ha) showed that most species were rare. However, species richness and composition patterns exhibited a high degree of predictability, which strengthen the possibility to apply biodiversity indicators in old-growth forest stands. Area was a key factor. The increase in species richness starts to level out at 2-3 ha. Large patches host more Red-list species in their interiors than do small ones, i.e. stand size is an important qualitative aspect of old-growth habitat. Nestedness emerged in relation to area but also in equal-sized plots. Structural complexity and habitat quality were important for species richness and compositional patterns, and small habitats of high quality could harbor many rare species. Monitoring of wood-fungi on downed logs showed that species diversity on downed logs changed over periods of 5-10 years and that the occurrences of annual species were unpredictable. It is suggested that monitoring of species with durable fruit bodies (mainly polypores) is likely to be a feasible approach to obtain comparable data over time.
Assessments of biodiversity of WKHs were performed in two areas with contrasting histories of forest exploitation, namely in south boreal and north boreal Sweden. Analyses of the history of 15 south boreal WKHs showed that fire-suppression, selective logging until mid-20th century and abandonment by modern forestry has shaped their forest structure. These WKHs are not untouched forests, they lack key structural components and harbor few Red-list species. Artificial interventions to restore natural processes and patterns are needed to further increase their suitability for threatned species. Modeling analyses of species richness in 32 WKHs in north boreal Sweden, some of which have not been isolated by modern forestry until recently, indicated an excess of crustose lichen species, i.e. WKHs may face delayed species extinctions. By contrast, the results indicate that wood-fungi have tracked the environmental changes. Differences in substrate dynamics between epiphytes on living trees and species growing on decaying logs may explain the diffeence between species groups. The results indicate that population densities of Red-list species were low, which may result in further depletion of species diversity.
Continuing species declines and extinctions are likely if not conservation of WKHs are combined with other considerations in th managed forest landscape. Both WKHs and their surroundings must be managed and designed to maintain biodiversity over time. For a successful future conservation of boreal forest biodiversity monitoring of WKHs must be combined with monitoring of refeence areas.
Hallmann, Christine Verfasser], Thomas [Akademischer Betreuer] [Friedl, and Michael [Akademischer Betreuer] Hoppert. "Biodiversity of terrestrial algal communities from soil and air-exposed substrates using a molecular approach / Christine Hallmann. Betreuer: Thomas Friedl. Gutachter: Thomas Friedl ; Michael Hoppert." Göttingen : Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2016. http://d-nb.info/108912368X/34.
Full textReider, Kelsey E. "Survival at the Summits: Amphibian Responses to Thermal Extremes, Disease, and Rapid Climate Change in the High Tropical Andes." FIU Digital Commons, 2018. https://digitalcommons.fiu.edu/etd/3919.
Full textJensen, Alex J. "Crossing Corridors: Wildlife Use of Jumpouts and Undercrossings Along a Highway With Wildlife Exclusion Fencing." DigitalCommons@CalPoly, 2018. https://digitalcommons.calpoly.edu/theses/1939.
Full textMaholland, Peter D. "Effects of Prescribed Fire on Upland Plant Biodiversity and Abundance in Northeast Florida." UNF Digital Commons, 2015. http://digitalcommons.unf.edu/etd/562.
Full textLevis, Nicholas A. "Level of UV-B Radiation Influences the Effects of Glyphosate-Based Herbicide on Fitness of the Spotted Salamander." TopSCHOLAR®, 2014. http://digitalcommons.wku.edu/theses/1335.
Full textBennik, Rebecca Marie. "The effects of honeybees on the biodiversity of manuka patches : a thesis presented in partial fulfilment of the requirements for the degree of Master of Science in Ecology, Massey University, Palmerston North, New Zealand." Massey University, 2009. http://hdl.handle.net/10179/1269.
Full textBanschbach, Valerie. "Bird Use of Lakes in the Claremont-Upland Area." Scholarship @ Claremont, 1986. http://scholarship.claremont.edu/pomona_theses/69.
Full textDuran, Alain. "Impact of Herbivory, Structural Complexity, and Sediment on Caribbean Coral Reefs." FIU Digital Commons, 2018. https://digitalcommons.fiu.edu/etd/3708.
Full textMosier, Damon Kurtis. "USING SINGLE-CELL SORTING, FISH AND 13C-LABELING TO CULTIVATE AND ASSESS CARBON SUBSTRATE UTILIZATION OF ‘AIGARCHAEOTA’ AND OTHER NOVEL THERMOPHILES." CSUSB ScholarWorks, 2019. https://scholarworks.lib.csusb.edu/etd/930.
Full textMolloy, Shaun. "Applying the principles of spatial modelling to the management of biodiversity in the fragmented landscapes of south-western Australia." Thesis, Edith Cowan University, Research Online, Perth, Western Australia, 2013. https://ro.ecu.edu.au/theses/870.
Full textCoghill, Lyndon M. "Statistical and Comparative Phylogeography of Mexican Freshwater Taxa in Extreme Aquatic Environments." ScholarWorks@UNO, 2013. http://scholarworks.uno.edu/td/1724.
Full textGandy, David A. "Examining Gradients in Novelty: Native and Non-native Fish Assemblages in Everglades Canals." FIU Digital Commons, 2013. http://digitalcommons.fiu.edu/etd/951.
Full textHansen, Joakim. "Effects of morphometric isolation and vegetation on the macroinvertebrate community in shallow Baltic Sea land-uplift bays." Doctoral thesis, Stockholms universitet, Botaniska institutionen, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-44331.
Full textAt the time of the doctoral defense, the following papers were unpublished and had a status as follows: Paper 2: Submitted. Paper 4: In press.
Duran, Alain. "Effects of Multiple Ecological Drivers on Recruitment and Succession of Coral Reef Macroalgal Communities." FIU Digital Commons, 2013. http://digitalcommons.fiu.edu/etd/905.
Full textVia, Stephen M. "From Seed to Sky: Impacts of explosive compounds on vegetation across spatial and developmental scales." VCU Scholars Compass, 2016. http://scholarscompass.vcu.edu/etd/4476.
Full textLars, Enström. "Gamla tallars betydelse för biologisk mångfald på Gotland." Thesis, Gotland University, Department of Biology, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:hgo:diva-282.
Full textModern methods for managing pine (Pinus sylvestris) create homogenized forests. This decreases nature’s potential for biodiversity and might threaten species in need of different types of milieu. The main purpose of this study was to investigate how important older pine trees are for biodiversity. In the Hall-Hangvar Reserve in the north-west part of Gotland, insects collected from traps showed that more species were found in old or dead trees compared to younger pine trees. A statistically significant difference was found for Coleoptera (beetles). The taxons of greatest interest for this study were Coleoptera and Hymenoptera (wasps). Certain families of Hymenoptera use ducts made by larvae from some families of Coleoptera.These larvae also serve as prey. Relevance concerning enviromental importance to species and diffrenences in inhabiting the three stages of pine trees was of importance.
Fisco, Dana. "Reef Fish Spatial Distribution and Benthic Habitat Associations on the Southeast Florida Reef Tract." NSUWorks, 2016. http://nsuworks.nova.edu/occ_stuetd/408.
Full textPinotti, Bruno Trevizan. "Pequenos mamíferos terrestres e a regeneração da Mata Atlântica: influência da estrutura do habitat e da disponibilidade de alimento na recuperação da fauna." Universidade de São Paulo, 2010. http://www.teses.usp.br/teses/disponiveis/41/41133/tde-21052010-103340/.
Full textBy sampling 28 sites in different regeneration stages in a continuous Atlantic forest area, in this master thesis we aimed to contribute to the understanding of the mechanisms associated with the wildlife changes observed during tropical forest regeneration, and thereby better understand the value of secondary forests for the conservation of tropical biodiversity. In the first part of the thesis we investigated the influence of regeneration on aspects of forest structure and food availability considered to be important to several wildlife groups. We found deeper leaf litter, and higher woody debris volume and fruit availability of an abundant understorey palm in the older-growth areas, while in areas in earlier stages we found higher vegetation connection, higher ground-dwelling arthropod biomass, total fruit availability, and availability of fruits of the most abundant understorey plant species. These modifications may be related to the wildlife changes observed during forest regeneration. Species that rely on features only found in older-growth forests, such as open space for movement, higher complexity of the forest floor, or certain food resources, could find limitations in younger forests, whereas species which do not depend on these resources could benefit from the higher total food availability, or higher 102 vegetation connection for movements, found in these areas. In the second part of the study, we assessed the effect of regeneration and of structural attributes and food availability on endemic (forest specialist) and non-endemic (habitat generalist) terrestrial small mammal species. As expected, we found that a group of species (habitat generalists) proliferate in younger areas, while the other group (forest specialists) is more common, although more subtly, in older-growth areas. These patterns were partly explained by the measured variables, especially food availability. Apparently, the generalist species are benefiting from the increased food availability found in younger forests, while specialist species have greater ability to occupy older-growth areas, where these resources are scarcer. Therefore, our data suggest a trade-off between competitive ability and ability to use abundant resources, as predicted by the successional niche mechanism, initially proposed to explain the succession of plant species. The characteristics observed in younger forests favored the proliferation of habitat generalist terrestrial small mammals. However, the positive effect of forest regeneration on specialist species, of more conservation concern, was less pronounced, so that the secondary forests harbored a rich terrestrial small mammal assemblage, and may therefore be an important tool to increase the area and connectivity in highly modified landscapes, such as those found in the Atlantic forest. However, these results do not diminish the value of old-growth forests, especially in fragmented landscapes and for more sensitive wildlife groups. These forests should be protected, as well as the regeneration of the secondary forests should be guaranteed (and assisted, if necessary), so that these areas could acquire in the long term the necessary conditions to maintain the species and the groups of species most adversely affected by the secondarization of the tropical forests.
Saraswati, Anandashila. "Swamp : walking the wetlands of the Swan Coastal Plain ; and with the exegesis, A walk in the anthropocene: homesickness and the walker-writer." Thesis, Edith Cowan University, Research Online, Perth, Western Australia, 2012. https://ro.ecu.edu.au/theses/588.
Full textBusse, Svenja. "Benthic diatoms in the Gulf of Bothnia : Community analysis and diversity." Doctoral thesis, Uppsala University, Plant Ecology, 2002. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-2591.
Full textBenthic diatoms are valuable tools for biological monitoring and paleo-ecological reconstruction of past environmental conditions. This thesis aims at describing size-related properties of benthic diatoms and suggests that data assessment for community analysis can be improved by considering the importance of scale. It investigates which environmental factors structure epilithic diatom communities on the coast of the Gulf of Bothnia and identifies environmental factors correlated with phytobenthic biomass. It also contributes to the floristic knowledge of the Baltic Sea.
Diatom species show large variation in size. The responses of large species (≥1000 μm3) in diatom communities to environmental factors are underestimated if solely measured as relative abundance, as is the common practice. However, relative abundance gives the best gradient resolution, as compared to surface area and biovolume, if species are counted separately in two biovolume classes. Small and large species in the same community may respond differently to the same environmental factors.
To assess the principal environmental factors structuring diatom communities in the Gulf of Bothnia, 270 quantitative samples were collected from submerged stones. Sampling was carried out in spring in four areas of the Bothnian Bay, characterized by a stable north-south salinity gradient (0.4-3.3 psu), and in three areas of the Bothnian Sea which has a rather uniform salinity of ca. 5 psu. Canonical correspondence analysis (CCA) identified salinity and exposure to wave action as the principal factors structuring the diatom communities of the Bothnian Bay, whereas exposure to wave action was the principal factor in the Bothnian Sea. Measurements of relative ignition loss suggested that the cover of macroalgae, and thereby the higher abundance of epiphytic diatoms in the epilithic samples, was positively correlated with salinity in the Bothnian Bay and with water movement in the Bothnian Sea.
Two new brackish water species are described, Navicula sjoersii S. Busse & Snoeijs and N. bossvikensis S. Busse & Snoeijs. The new species are compared with N. perminuta Grunow, a common brackish-water species.
Harencar, Julia Gardner. "The population genetics of Morro Bay eelgrass (Zostera marina)." DigitalCommons@CalPoly, 2017. https://digitalcommons.calpoly.edu/theses/1971.
Full textJonsson, Micael. "Investigations of species richness effects on ecosystem functioning using stream-living macroinvertebrates as model organisms." Doctoral thesis, Umeå : Univ, 2003. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-164.
Full textWeidow, Elliot D. "Genetic Diversity in an Invasive Clonal Plant? A Historical and Contemporary Perspective." ScholarWorks@UNO, 2018. https://scholarworks.uno.edu/td/2522.
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