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Rozprawy doktorskie na temat „Effect of habitat modification on”

Autor: Grafiati

Data publikacji: 4 czerwca 2021

Data aktualizacji: 3 marca 2023

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1

Rangeley, Robert W. (Robert William). "Habitat selection in juvenile pollock, Pollachius virens : behavioural responses to changing habitat availability." Thesis, McGill University, 1994. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=28648.

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This thesis demonstrates how tidal changes in the availability of intertidal zone habitats can affect the distribution and behaviour of juvenile pollock (Pollachius virens). Schools of pollock moved from the subtidal zone to the open habitat in the intertidal zone. On rising tides, pollock switched from the open habitat at low tidal stages to the dense algal habitat at high tidal stages. On falling tides, pollock rapidly schooled downshore in the open habitat. Pollock were rarely solitary in the open habitat and usually formed large schools. In the algal habitats, pollock were usually disperse

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Maran, Audrey Marie. "The effect of anthropogenic habitat modification on insect-mediated ecosystem services." Bowling Green State University / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1594488419133855.

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Groshens, Thomas P. "An assessment of the transferability of habitat suitability criteria for smallmouth bass, Micropterus dolomieu." Thesis, Virginia Tech, 1993. http://hdl.handle.net/10919/44601.

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<p>The purpose of this study was to determine if habitat suitability criteria developed in the summer months for sma11mouth bass were transferable among streams representing different eco regions.</p> <p> Habitat suitability criteria were developed for depth, mean column velocity, cover and substrate for two size classes of sma1lmouth bass, 100-199mm and >200mm, in the North Anna River and Craig Creek, Virginia.</p> <p> Criteria that accurately describe habitat selection by a species or guild in a system different from where the criteria were developed are said to be transferable to that syste

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4

Gonsalves, Sydney Marie. "Green Roofs and Urban Biodiversity: Their Role as Invertebrate Habitat and the Effect of Design on Beetle Community." PDXScholar, 2016. http://pdxscholar.library.pdx.edu/open_access_etds/2997.

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With over half the world's population now living in cities, urban areas represent one of earth's few ecosystems that are increasing in extent, and are sites of altered biogeochemical cycles, habitat fragmentation, and changes in biodiversity. However, urban green spaces, including green roofs, can also provide important pools of biodiversity and contribute to regional gamma diversity, while novel species assemblages can enhance some ecosystem services. Green roofs may also mitigate species loss in urban areas and have been shown to support a surprising diversity of invertebrates, including rar

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5

Register, Sarah M. "Breeding biology and habitat associations of cerulean warblers in southern Indiana." Virtual Press, 2007. http://liblink.bsu.edu/uhtbin/catkey/1372052.

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The Cerulean Warbler (Dendroica cerulea), a once common summer inhabitant and breeder in southern Indiana, has declined at both local and continental population levels. Effects of specific silvicultural practices on the distribution and abundance of the Cerulean Warbler is unknown. During the summers of 2005 & 2006, Cerulean Warblers were surveyed within the Morgan-Monroe and Yellowwood state forests, as well as the Hoosier National Forest in southern Indiana. Three forest types were surveyed; unharvested reference sites were compared with single tree selection treatments and treatments where

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6

Tomblin, David Christian. "Ecological niche responses of small mammals to gypsy moth disturbance." Thesis, This resource online, 1994. http://scholar.lib.vt.edu/theses/available/etd-06302009-040517/.

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Siegel, James Joshua 1956. "An evaluation of the minimum habitat quality standards for birds in old-growth ponderosa pine forests, northern Arizona." Thesis, The University of Arizona, 1989. http://hdl.handle.net/10150/276951.

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I studied breeding birds and vegetation in 6 largely pristine old-growth ponderosa pine (Pinus ponderosa) stands and in 3 logged stands that just met the USDA Forest Service's minimum habitat quality standards for old-growth ponderosa pine. Bird populations were similar in all stands. However, brown creepers (Certhia americana) and hermit thrushes (Cattarus guttatus) were low in abundance or absent in 2 of the minimum stands, yet were common in all other stands. Both species preferred cool, moist microenvironments for nesting and/or foraging; conditions that appeared lacking in the more xeric

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8

Luck, Gary W. "Landscape differences in the ecology of the Rufous Treecreeper Climacteris Rufa." Thesis, Edith Cowan University, Research Online, Perth, Western Australia, 2000. https://ro.ecu.edu.au/theses/1546.

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Anthropogenic habitat modification is a significant threat to the conservation or global biodiversity. The fragmentation and alteration of woodland habitat has resulted in the substantial decline of many woodland bird species in the agricultural regions of southern Australia. The Rufous Treecreeper Climacteris rufaa, a once common woodland resident, has declined in abundance in the wheatbelt of Western Australia and appears to be sensitive to habitat fragmentation. The reasons for this are unclear because our knowledge of the species and the threats posed by fragmentation arc limited. In this

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9

Tatchley, Cerian. "Wildlife impacts of, and public attitudes towards, small wind turbines." Thesis, University of Stirling, 2015. http://hdl.handle.net/1893/22894.

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Global wind power generation has grown rapidly in response to targets to reduce greenhouse gas emissions as part of efforts to mitigate climate change, and to increase energy security. While much of the focus in wind energy technology to date has been on wind farms, a relatively recent development is the expansion of the micro-wind sector (turbines generating < 100 kW), and there are now over 870,000 small wind turbines (SWTs) installed globally. However, official planning guidance for SWTs in the UK and elsewhere is lacking. This may be a barrier to SWT installations if there is confusion ove

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10

Smith, Scott M. "The influence of submerged aquatic vegetation on trophic relationships of largemouth bass." Thesis, Virginia Polytechnic Institute and State University, 1989. http://hdl.handle.net/10919/74542.

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Aquatic vegetation is considered a nuisance in many lakes and reservoirs supporting largemouth bass populations, and control (eradication) of vegetation is often undertaken. Yet, the relationship between submerged aquatic vegetation and adult largemouth bass, from a trophic standpoint, is poorly understood. I attempted to quantify this relationship by comparing available prey with consumption from the perspective of individual largemouth bass and the largemouth bass population in Flat Top Lake, West Virginia in 1986 and 1987. The abundance of largemouth bass ≥200 mm long was positively assoc

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11

Ricciardi, Anthony. "The role of the zebra mussel (Dreissena polymorpha) in structuring benthic macroinvertebrate communities in the St. Lawrence River /." Thesis, McGill University, 1996. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=34438.

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This research examined how an invasive macrofouling organism, the Eurasian zebra mussel (Dreissena polymorpha), alters benthic communities in a riverine ecosystem. Controlled field experiments using artificial substrates showed that macroinvertebrate abundance is significantly enhanced within Dreissena beds, and that the physical habitat provided by mussel shells has a greater impact on macroinvertebrate abundance than biological factors (e.g., food provided by mussel biodeposits). Data collected at field sites before and after the establishment of dense Dreissena colonies suggested that these

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12

Bank, Michael S. "Mercury Bioaccumulation and Habitat Relations of Lotic and Lentic Amphibians from Acadia National Park, Maine, USA." Fogler Library, University of Maine, 2005. http://www.library.umaine.edu/theses/pdf/BankMS2005.pdf.

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13

Breitfuss, Mark, and n/a. "The Effects of Physical Habitat Modification for Mosquito Control, Runnelling, on Selected Non-Target Saltmarsh Resources." Griffith University. Australian School of Environmental Studies, 2003. http://www4.gu.edu.au:8080/adt-root/public/adt-QGU20031126.074304.

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Runnelling is a popular method of physical habitat modification employed on saltmarshes to control pest mosquito populations. The runnelling method involves linking the tidal source to isolated mosquito breeding pools via shallow channels that enable slow water movement of low amplitude tides. Increased tidal flushing inhibits mosquito development. The range of organisms which inhabit saltmarsh are likely to be influenced by altered tidal conditions as they exhibit specific physicochemical requirements for feeding, burrowing or growth. The dynamic nature of saltmarsh may mean that changes

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14

Breitfuss, Mark. "The Effects of Physical Habitat Modification for Mosquito Control, Runnelling, on Selected Non-Target Saltmarsh Resources." Thesis, Griffith University, 2003. http://hdl.handle.net/10072/367526.

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Runnelling is a popular method of physical habitat modification employed on saltmarshes to control pest mosquito populations. The runnelling method involves linking the tidal source to isolated mosquito breeding pools via shallow channels that enable slow water movement of low amplitude tides. Increased tidal flushing inhibits mosquito development. The range of organisms which inhabit saltmarsh are likely to be influenced by altered tidal conditions as they exhibit specific physicochemical requirements for feeding, burrowing or growth. The dynamic nature of saltmarsh may mean that changes

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15

Whytock, Robin C. "Optimising habitat creation for woodland birds : the relative importance of local vs landscape scales." Thesis, University of Stirling, 2018. http://hdl.handle.net/1893/27298.

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Global land-use change and industrialisation has driven biodiversity declines and impaired ecosystem functioning. Recently, there have been large-scale efforts to not only halt habitat loss but create and restore habitat on formerly managed (e.g. agricultural) land. However, although the effects of habitat loss and fragmentation on biodiversity are well understood, our understanding of how biodiversity responds to habitat created in a patchy configuration is not. In particular, little is known about the relative importance of local (e.g. patch size) vs landscape scales (e.g. amount of habitat

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16

Magoba, Rembuluwani Norman Nicholas. "Effect of invasion and clearing of alien riparian vegetation on benthic macroinvertebrate and adult odonata assemblages in Soutpansberg rivers." Thesis, Stellenbosch : University of Stellenbosch, 2005. http://hdl.handle.net/10019.1/1800.

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Thesis (MScAgric (Conservation Ecology and Entomology)--University of Stellenbosch, 2005.<br>Benthic macroinvertebrates (sampled using South African Scoring System, SASS5) and adult male Odonata (sampled with close-focus binoculars) were recorded on two streams and a river of Soutpansberg, with the aim of determining the effect of invasion and removal of alien riparian vegetation on their assemblages. A secondary aim was to establish the importance of dragonflies as indicators of degree of disturbance in rivers. Forty two aquatic macroinvertebrate families and 33 adult Odonata species were rec

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17

Devoucoux, Pierrick. "Conséquences et impacts prévisibles d'une perte d'habitat majeure sur une espèce menacée aux exigences écologiques complexes : effets de la mise en place du contournement ferroviaire à grande vitesse Nîmes-Montpellier sur la dynamique de la population d'Outarde canepetière des Costières de Nîmes." Thesis, Poitiers, 2014. http://www.theses.fr/2014POIT2285/document.

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L'urbanisation et la construction d'infrastructures de transports sont aujourd'hui la première cause de baisse de diversité. De par la perte d'habitat et la fragmentation du paysage qu'ils engendrent, ces ouvrages impactent les populations. Notre travail a cherché à évaluer, sur une espèce aux exigences écologiques complexes, les impacts prévisibles de la mise en place d'une Ligne à Grande Vitesse (LGV) et leurs conséquences. Nous avons étudiés la population d'Outarde canepetière Tetrax tetrax des Costières de Nîmes. A l'échelle de son aire de répartition, cette population fait figure d'except

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18

Lewis, Cassandra Kasun. "The effects of habitat fragmentation on Amorpha canescens, a prairie forb, and its associated herbivores." Thesis, University of Iowa, 1999. https://ir.uiowa.edu/etd/5396.

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Onken, Kai Sven. "Effects of native freshwater mussels and leaf debris on benthic macroinvertebrate abundance and diversity : A field experiment with Margaritifera margaritifera in Vasslabäcken, Örebro county." Thesis, Karlstads universitet, Institutionen för miljö- och livsvetenskaper (from 2013), 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-84485.

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Organisms that are part of complex ecosystems interact not only with other organisms but also with their environment, affecting ecosystem functions. In aquatic ecosystems filter feeders affect ecosystem functioning by transferring energy and nutrients from the water to the benthos. The filter-feeding unionoid mussels can have strong effects on nutrient release and biodeposition in streams, affecting primary and secondary production. In a 90-day field cage experiment during winter 2019-2020, effects of the critically endangered freshwater pearl mussel (Margaritifera margaritifera) and leaf litt

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20

Lau, Jamie K. "Impacts of channelization on stream habitats and associated fish assemblages in east central Indiana." Virtual Press, 2005. http://liblink.bsu.edu/uhtbin/catkey/1319547.

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The objective of this study was to determine the relationship between fish assemblage structure and habitat in streams dominated by an agricultural landscape. Fishes from 20 natural and 20 channelized streams were sampled using electrofishing gear in East Central Indiana. Streams that had been channelized had a lower quality fish assemblage when compared to natural streams as measured by the Indiana V. Eastern Corn Belt Plain Index of Biotic Integrity (IBI). Stream habitat was evaluated using the Qualitative Habitat Evaluation Index (QHEI), which indicated that channelized streams had lower qu

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21

Hugo, Christine Denise. "The influence of fire and plantation management on Wetlands on the Tsitsikamma plateau." Thesis, Nelson Mandela Metropolitan University, 2011. http://hdl.handle.net/10948/1464.

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Wetlands on the extensively afforested Tsitsikamma Plateau are prone to fire and according to foresters, they behave as fire channels that under bergwind conditions rapidly carry fire into plantations. The destruction of plantations causes great economic loss and MTO would therefore prefer to afforest some smaller wetlands to limit the fire hazard. This study was carried out in the middle of a drought period and sought to determine the influence of fire, plantation management and the environment on wetlands and its component species. This study of palustrine wetlands on the Tsitsikamma Plateau

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22

Mercado, Alida. "Ground beetle (Coleoptera:Carabidae) communities along a successional gradient in southwestern Quebec and notes on the range expansion of introduced species." Thesis, McGill University, 2005. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=97966.

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Species diversity is influenced by disturbance in the environment. Ground beetles (Coleoptera: Carabidae) were used as a model taxon to study the effects of disturbance (i.e., time since disturbance) in different habitats along a successional gradient (agricultural fields, old fields, young forests and old forests). Seventy-three species (5139 individuals) were collected during both years of sampling, of which 9 species are introduced species and compose 64.8% of the total catch. In contrast to the predictions of the Intermediate Disturbance Hypothesis, diversity of ground beetles was higher i

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23

Goodman, James R. "Artificial avian nest predation in a Kansas tallgrass prairie." Virtual Press, 1999. http://liblink.bsu.edu/uhtbin/catkey/1129624.

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Several species of Neotropical migrant songbirds are experiencing declining population numbers. One of many proposed reasons for these declines is the dramatic loss of suitable prairie and grassland nesting habitat in the central United States. The Konza Prairie - a native tallgrass prairie preserve in central Kansas - was used to study possible edge-effect predation of artificial avian ground nests. Two Japanese quail eggs were placed in created artificial nests along transect lines from a wooded edge, a recently burned edge, and a control area. The rate of nest predation after seven days was

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Neef, Götz-Georg. "Comparative phylogeography of five swallowtail butterfly species (Lepidoptera: Papilionidae) in South Africa : ecological and taxonomic implications." Thesis, Rhodes University, 2014. http://hdl.handle.net/10962/d1013574.

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With current biota under constant threat of extinction, it is important to ascertain where and how biological diversity is generated and partitioned. Phylogeographic studies can assist in the identification of places and processes that indicate the origin and maintenance of biodiversity. Forest fragmentation has a big effect on local extinction and loss of genetic diversity of forest-restricted taxa, along with divergence and speciation of forest biota. This study aims to understand the effects of these processes on a number of forest-dwelling butterflies using a comparative phylogeographic ap

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Stephenson, Thomas Robert. "Mule deer response to military activity in southeast Colorado." Thesis, This resource online, 1989. http://scholar.lib.vt.edu/theses/available/etd-07292009-090244/.

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Shacks, Vincent. "Habitat vulnerability for the Nile crocodile (Crocodylus niloticus) in the Okavango Delta, Botswana." Thesis, Link to the online version, 2006. http://hdl.handle.net/10019/1651.

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Cabrera-García, Leonardo. "Linking social and ecological dynamics for bird conservation : protecting the endangered Sierra Madre sparrow in Chichinautzin, Mexico." Thesis, McGill University, 2006. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=102793.

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Birds are one of the best studied animal groups in the world but are also amongst the most endangered. The wealth of ecological information has shown habitat protection to be vital to bird biodiversity, but habitat loss and degradation continue to defeat conservationists.<br>Community-based biodiversity conservation efforts have been recently recognized as an important option for safeguarding ecosystems while reducing land use conflicts arising from the material, cultural and spiritual needs of local inhabitants. Community involvement is particularly critical for conservation in anthropogenic

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Mangachena, Joy Rumbidzai. "Response of bird assemblages to the invasion and clearing of alien trees in the Western Cape, South Africa." Thesis, Cape Peninsula University of Technology, 2016. http://hdl.handle.net/20.500.11838/2583.

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Thesis (MTech (Conservation and Marine Sciences))--Cape Peninsula University of Technology, 2016.<br>Invasive alien plant species pose a major threat to global biodiversity by displacing native vegetation and transforming habitats. In South Africa, invasive alien plants have become a major component of most habitats. River systems are particularly affected owing to their dynamic nature and to anthropogenic activities. This has resulted in fynbos riparian scrub vegetation being replaced mainly by Acacia and Eucalyptus species, with serious ecological and economic impacts. The presence of alien

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Mbande, Sekiwe. "Fishes in the Mngazi and Mngazana estuaries, with particular emphasis on the community structure and primary carbon sources." Thesis, Rhodes University, 2004. http://hdl.handle.net/10962/d1005386.

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The fish community structure of two contrasting estuaries, one with a well developed mangrove forest (Mngazana) and the other without mangroves (Mngazi) was compared. Both the Mngazi and Mngazana estuary fish communities were dominated by marine species, reflecting the importance of these systems as nursery areas for marine fishes. The Mngazi Estuary contained 18% more estuarine fishes in terms of catch per unit effort (CPUE) than the Mngazana Estuary. The reduced tidal influence due to the narrow mouth opening is a possible reason for the heightened CPUE of estuarine species in the Mngazi est

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Sharratt, Norma. "Response of aquatic macroinvertebrate and aerial odonate assemblages to the removal of invasive alien trees in the Western Cape." Thesis, Stellenbosch : Stellenbosch University, 2005. http://hdl.handle.net/10019.1/50440.

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Thesis (MSc)--University of Stellenbosch, 2005.<br>ENGLISH ABSTRACT: Invasive alien trees, especially Acacia species, are a great threat to biodiversity in South African rivers. The national Working for Water Programme is addressing the alien problem by removing alien trees from river margins. The concern is that this may be creating even further disturbance by affecting water quality and habitats. In particular, how is this affecting rare and endemic species? Benthic macro invertebrates and aerial odonates were assessed along five Western Cape rivers in alien-invaded, cleared and natura

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Holgate, Katheryn T., and University of Lethbridge Faculty of Arts and Science. "The effects of cattle grazing on the breeding biology of riparian forest birds." Thesis, Lethbridge, Alta. : University of Lethbridge, Faculty of Arts and Science, 1999, 1999. http://hdl.handle.net/10133/349.

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Cattle grazing in riparian zones can have large impacts on vegetation characteristics and avian biodiversity. To assess these impacts in southern Alberta, vegetation and bird surveys were conducted in twelve riparian sites (four each in heavily grazed, moderately grazed, and ungrazed habitats) along the Oldman River. The shrub understory and bird species diversity and abundance declined significantly as grazing intensity increased. Settlement patterns, territory sizes, and food provisioning rates of some bird species were examined to assess the mechanisms behind this reduction. Five out of sev

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Holl, Karen D. "Vegetational and lepidopteran conservation in rehabilitated ecosystems." Diss., Virginia Tech, 1994. http://hdl.handle.net/10919/40121.

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Coal surface mining and associated reclamation practices have had an immense impact on the landscape of the Appalachian region of the United States. However, their effect on floral and faunal conservation has been poorly documented. Lepidopteran communities, vegetation, and nectar resources were studied on 19 mine sites reclaimed 0-30 years previously and five sites in the surrounding hardwoods in southwestern Virginia. The goals of this work were to characterize vegetational and lepidopteran communities of these sites; to understand the relationships between the two; and to assess the role of

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Ivande, Samuel T. "Distribution ecology of Palearctic migrants in the humid Guinea savannah in West Africa." Thesis, University of St Andrews, 2015. http://hdl.handle.net/10023/7446.

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Declines in breeding populations of most migrants across much of the Palearctic have been linked to environmental conditions in their African non-breeding grounds. Studying winter distribution dynamics for these species is necessary to understand how factors in these areas may influence their overall population dynamics. This thesis explored in detail the distribution ecology of migrants in the Guinea savannah, the region from where wintering migrants currently show the greatest breeding population declines. In particular, I investigated some prevailing but hitherto little tested ecological hy

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Crowther, Amy E. "The restoration of intertidal habitats for non-breeding waterbirds through breached managed realignment." Thesis, University of Stirling, 2007. http://hdl.handle.net/1893/334.

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Conservation of intertidal habitats in the UK is vital in order to continue to support nationally and internationally important populations of non-breeding waterbirds. Historic reclamation for agriculture and industry has resulted in the loss and degradation of large areas of these intertidal habitats in estuaries and they continue to be threatened by sea-level rise. Managed realignment is one method which is increasingly being used to restore intertidal habitats. As managed realignment is a relatively new restoration technique, the extent to which knowledge of the biology of estuaries is appl

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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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Andrus, Wonnita, and University of Lethbridge Faculty of Arts and Science. "Ecology and conservation of prairie rattlesnakes (Crotalus viridis viridis) in relation to movement in a fragmented urban environment." Thesis, Lethbridge, Alta. : University of Lethbridge, Dept. of Biological, c2010, 2010. http://hdl.handle.net/10133/2620.

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Eighteen prairie rattlesnakes (Crotalus viridis viridis) were tracked using radio-telemetry and 82 snakes were PIT-tagged over a 2-year period in Lethbridge, AB to determine population size, movement patterns, and habitat utilization, and to predict fragmentation effects on the species within an urban locale. Population size was estimated using closed population models at 374 snakes (295 adults) and open population models at 204 snakes (161 adults), greater than an estimate of <50 adults in 2003 (Ernst, 2003) and 2006 (Ernst & Quinlan, 2006). Mean home range sizes, based on 95% minimum convex

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Braulik, Gillian T. "Conservation ecology and phylogenetics of the Indus River dolphin (Platanista gangetica minor)." Thesis, University of St Andrews, 2012. http://hdl.handle.net/10023/3036.

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The historical range of the Indus River dolphin has declined by 80% since the 19th century and has been fragmented into 17 river sections by construction of irrigation barrages. Dolphin sighting and interview surveys showed that river dolphins persist in six river sections, have been extirpated from ten, and are of unknown status in the remaining section. Logistic regression and survival modelling showed that low dry season river discharge was the primary factor responsible for the Indus dolphins range decline. Abundance of the three largest Indus dolphin subpopulations was estimated using tan

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Tweddle, Gavin Paul. "The influence of overwash and breaching events on the spatial and temporal patterns in ichthyofauna community composition in a temporarily open/closed southern African estuary." Thesis, Rhodes University, 2013. http://hdl.handle.net/10962/d1002957.

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This study assessed the importance of overwash and breaching events on the ichthyofaunal community structure in the medium-sized temporarily open/closed Mpekweni Estuary located on the southeast coastline of southern Africa. The fish in the littoral zone of the estuary were sampled using a 5m seine net while the channel region was sampled using two nets, a smaller meshed 30m seine net to target the estuarine spawning species and the juvenile estuarine-dependant marine spawners, and a larger meshed 50m seine net to target the larger marine and freshwater spawning species. Intensive monthly samp

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Mataruse, Gamuchirai. "Phylogeography and conservation of a newly identified galaxiid from the Joubertina area, South Africa." Thesis, Rhodes University, 2013. http://hdl.handle.net/10962/d1003050.

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The dispersal of freshwater fishes in the Cape Floristic Region of South Africa has been attributed to river capture events and confluence of rivers during sea level regression. The role of low drainage divides and inter-basin water transfers have received less attention. A unique lineage of Galaxias zebratus (hereafter the Joubertina galaxias) occurs in two currently isolated river systems, the Gamtoos and Krom. The present study mapped the distribution of the Joubertina galaxias and used mitochondrial and nuclear DNA sequences to assess the processes that could have influenced its current di

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Junkuhn, Kyle Peter. "The role of seasonality, environmental correlates and edge effects on the diversity and abundance of small mammals in Afromontane forest patches, Eastern Cape, South Africa." Thesis, Rhodes University, 2015. http://hdl.handle.net/10962/d1018188.

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The Eastern Cape contains the majority of the remaining forested areas in South Africa (95.8 percent Coastal forests and 47.6 percent Afromontane forests), however these occur in fragments. Due to the rapid rise in the human population and its needs, conversion of forests to agricultural land and the extraction of timber increases, natural vegetation are lost and this therefore leads to forests becoming fragmented into small forest patches. One of the main consequences of forest fragmentation is loss of contiguous habitat, which is the dominant threat to species globally as it negatively affec

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Gray, Michael Andrew. "The ecological impacts of habitat modification on tropical biodiversity." Thesis, University of York, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.440791.

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Brush, Janell Marie. "Wetland avifauna usage of littoral habitat prior to extreme habitat modification in Lake Tohopekaliga, Florida." [Gainesville, Fla.] : University of Florida, 2006. http://purl.fcla.edu/fcla/etd/UFE0014260.

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Muench, Ann Marie. "Aquatic vertebrate usage of littoral habitat prior to extreme habitat modification in Lake Tohopekaliga, Florida." [Gainesville, Fla.] : University of Florida, 2004. http://purl.fcla.edu/fcla/etd/UFE0008580.

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Wesenbeeck, Bregje Karien van. "Thresholds and shifts : consequences of habitat modification in salt-marsh pioneer zones /." PURL, 2007. http://www.arlis.org/docs/vol1/A/433191982.pdf.

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Twitchell, Sara Erin. "Evaluating the Effects of Road Crossing Structures on Stream-Associated Amphibians in the Wilson River Watershed, Tillamook State Forest, Oregon." Thesis, Portland State University, 2013. http://pqdtopen.proquest.com/#viewpdf?dispub=1535858.

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<p> As replacement and removal of undersized culverts gains momentum as an effective technique for restoring natural stream flows and removing fish passage barriers, it is important to evaluate the benefits of these efforts on the in-stream and adjacent riparian habitat for other species of potential concern. This study compares stream-associated amphibian (SAA) occurrence in streams adjacent to different road crossing structures on unpaved forest roads in the Wilson River watershed located within the Tillamook State Forest, Oregon. Surveys were conducted at road crossing structures for three

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Pereboom, Vincent. "Mode d'utilisation du milieu fragmenté par une espèce forestière aux habitudes discrètes." Angers, 2006. http://www.theses.fr/2006ANGE0032.

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La biologie de la conservation est une discipline de crise qui se trouve constamment confrontée au manque de données concrètes sur l’éco-éthologie des espèces. La destruction du milieu forestier est la cause majeure de la disparition des espèces dans le monde alors qu’en Europe et Amérique du nord, c’est surtout la destruction des bosquets, des arbres isolés et des haies qui met la survie des populations en danger. Afin d’obtenir des nouvelles connaissances sur l’impact de cette fragmentation de l’habitat, j’ai choisi comme modèle d’étude une espèce considérée comme inféodée aux forêts et reco

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Clarke, Matthew John. "The effect of habitat fragmentation on ecosystem processes." Thesis, University of Bristol, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.364922.

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Axisa, Benedict. "The effect of doxycycline on carotid plaque modification." Thesis, University of Leicester, 2002. http://hdl.handle.net/2381/29400.

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Watson, Nicholas. "Habitat preferences and the effect of habitat reduction on the quenda (Isoodon fusciventer) in an urban environment." Thesis, Watson, Nicholas (2018) Habitat preferences and the effect of habitat reduction on the quenda (Isoodon fusciventer) in an urban environment. Honours thesis, Murdoch University, 2018. https://researchrepository.murdoch.edu.au/id/eprint/43141/.

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Habitat loss has been a large contributing factor in the decline in abundance of many fauna species in Australia. Ground-dwelling mammals are particularly susceptible to this threat and with the increase in urbanisation, there is a pressing need to conserve species that remain in these environments. The quenda (Isoodon fusciventer) is one of the remaining native mammals that persists in the metropolitan area of Western Australia. With the quenda’s recent upgrade to species level, existing information on this species is often extrapolated from eastern sub-species of the southern brown bandicoot

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Osinubi, Samuel Temidayo. "Habitat Effect on the Behaviour and Condition of the Yellow-breasted Boubou (Laniarius atroflavus)." Thesis, University of Canterbury. Biological Sciences, 2012. http://hdl.handle.net/10092/6495.

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This project was aimed at investigating behaviour and condition of the Yellow-breasted Boubou, Laniarius atroflavus, in response to habitat differences across core, edge and riparian Afro-montane forest habitats at the Ngel Nyaki Forest Reserve, Nigeria. This species is little known and conservation effort will require direction in identifying the habitat of best quality for their survival. The determination of habitat association using correspondence analysis of census data suggested strongest association with the riparian habitat, even though this habitat held the least overall avian biodive

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