Dissertations / Theses on the topic 'Habitats'
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Zauderer, Jeffrey. "Riparian Habitats of the Southeast Sierrita Mountains: Vanished Perennial Habitats." Arizona-Nevada Academy of Science, 1989. http://hdl.handle.net/10150/296427.
Full textButucariu, Diana. "Habits and Habitats : Crafting Through a Prism of Culture Shock." Thesis, Konstfack, Keramik & Glas, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:konstfack:diva-4691.
Full textStevens, Tim, and n/a. "Mapping Benthic Habitats for Representation in Marine Protected Areas." Griffith University. School of Environmental and Applied Science, 2004. http://www4.gu.edu.au:8080/adt-root/public/adt-QGU20040303.124815.
Full textStevens, Tim. "Mapping Benthic Habitats for Representation in Marine Protected Areas." Thesis, Griffith University, 2004. http://hdl.handle.net/10072/367557.
Full textThesis (PhD Doctorate)
Doctor of Philosophy (PhD)
School of Environmental and Applied Science
Full Text
Catton, Robert Bruce. "Winter use and habitat selection of moose in openings and adjacent upland forested habitats." Thesis, University of British Columbia, 2007. http://hdl.handle.net/2429/31919.
Full textForestry, Faculty of
Graduate
Clark, Ezra. "Microthermal habitats in British rivers." Thesis, University of Exeter, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.267237.
Full textGoldhahn, Eila. "Shared habitats : the MoverWitness paradigm." Thesis, University of Plymouth, 2007. http://hdl.handle.net/10026.1/2335.
Full textHodgson, Jenny. "Butterfly metapopulations in dynamic habitats." Thesis, University of York, 2007. http://etheses.whiterose.ac.uk/14200/.
Full textBryce, Casey Catherine. "Microbial stress in rock habitats." Thesis, University of Edinburgh, 2015. http://hdl.handle.net/1842/15776.
Full textFerretti, Stefano <1976>. "Innovative technologies for Space habitats." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2008. http://amsdottorato.unibo.it/958/1/Tesi_Ferretti_Stefano.pdf.
Full textFerretti, Stefano <1976>. "Innovative technologies for Space habitats." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2008. http://amsdottorato.unibo.it/958/.
Full textBrosse, Laurent. "Caractérisation des habitats des juvéniles d'esturgeon européen, Acipenser sturio, dans l'estuaire de la Gironde : relation trophiques, hiérarchisation et vulnérabilité des habitats." Toulouse 3, 2003. http://www.theses.fr/2003TOU30123.
Full textRedolfi, Bristol Simone <1990>. "Nursery function of coastal lagoons: implications of habitat connectivity for the management of lagoon habitats." Doctoral thesis, Università Ca' Foscari Venezia, 2018. http://hdl.handle.net/10579/14999.
Full textSecchin, Nelio Augusto. "Mapeamento de habitats marinhos no banco dos Abrolhos." reponame:Repositório Institucional da UFES, 2011. http://repositorio.ufes.br/handle/10/2008.
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A plataforma continental tropical é composta por um mosaico de megahabitats que suportam uma alta diversidade de habitats, e atualmente vêm sofrendo com as pressões antrópicas. O desenvolvimento e a aplicação de geotecnologias em estudos de mapeamento do substrato marinho vêm proporcionando um aumento no conhecimento dos habitats bentônicos. Importante formação coralínea do Atlântico Sul, a Plataforma dos Abrolhos, não possui informações suficientes que possibilitem uma gestão efetiva. O presente estudo tem com objetivo apresentar uma distribuição espacial e caracterização dos domínios dos principais megahabitats da Plataforma dos Abrolhos. Para tal, foram utilizados dados diretos e indiretos de investigação geológica, com uma combinação metodológica englobando levantamentos de SVL, ecobatímetro monofeixe e ROV, sendo base para uma classificação hierárquica dos megahabitats e integração com dados pretéritos levantados. Alcançando uma representação interpretativa dos tipos de fundo da região estudada (50.500km²), a aplicação metodológica possibilitou gerar uma nova visão para a Plataforma dos Abrolhos. Foram identificados os domínios de megahabitat Recifal (17%), Rodolito (51%), bem como as principais feições de cada um, ocorrendo com variações na distribuição e ocorrência em relação à disposição ao perfil batimétrico. Uma estrutura recifal que ocorre juntamente com o domínio de rodolitos, as Buracas, é um habitat particular que pode ter uma importância significativa para o ecossistema de Abrolhos. A metodologia aplicada foi satisfatória na geração de uma representação da distribuição e descrição de megahabitats marinhos para toda a Plataforma dos Abrolhos. Oferecendo, assim, uma nova abordagem em estudos de delineamento de habitats marinhos aplicados na costa brasileira, sendo importante pela área espacial representada, contida em uma região singular onde havia uma lacuna no conhecimento sobre a distribuição e caracterização deste habitat em toda a sua extensão.
The continental shelf is composed of a tropical mosaic megahabitats that support a high diversity of habitats, and now have suffered from anthropogenic pressures. The development and application of geo-mapping studies of the marine substrate has provided increased knowledge of benthic habitats. The most important coral reef formation of the South Atlantic, Abrolhos Platform, does not have sufficient information to enable effective management. The present study aims at presenting a spatial distribution and characterization of the major fields of the Platform of the Abrolhos' megahabitats. To this end, we used data from direct and indirect geological research, with a combination of surveys covering methodological SSS, and echo sounder, ROV, and the basis for a hierarchical classification of megahabitats and integration with past data collected. Reaching an interpretative representation of the types of background of the region studied (50.500km²), the methodological application was able to generate a new vision for the Platform of the Abrolhos. We identified areas of reef megahabitat (17%), Rhodolite (51%) as well as the main features of each, with variations occurring in the distribution and occurrence in relation to the available bathymetric profile. A reef structures that occurs with the domain Rhodolite, the Buracas, is a particular habitat that may have a significant importance for the ecosystem of Abrolhos. The methodology was applied to generate a satisfactory representation of the distribution and description of marine megahabitats for the entire Abrolhos Platform. Thus offering a new approach to design studies of applied marine habitats along the Brazilian coast, is important for the space represented, contained in a unique region where there was a gap in knowledge about the distribution and characterization of this habitat throughout its length.
Brickhill, Michael John. "Enhancement of Fish Stock by Habitat Manipulation in Artificial Waterways." Thesis, Griffith University, 2009. http://hdl.handle.net/10072/367810.
Full textThesis (PhD Doctorate)
Doctor of Philosophy (PhD)
School of Environment
Science, Environment, Engineering and Technology
Full Text
Maciejewski, Lise. "Reconnaissance et dynamique récente des habitats forestiers dans le contexte de la Directive Habitats-Faune-Flore." Electronic Thesis or Diss., Paris, AgroParisTech, 2021. http://www.theses.fr/2021AGPT0001.
Full textIn 1992, European natural habitats became items to be conserved in the same way as species were, thanks to the Habitats Directive. This enlarged the scope of action of nature protection public policies to a new level of biodiversity organisation. But the late recognition of the conservation value of habitats and the gaps in their definitions partly explain the absence of time series data at the national scale. This limits our capacity to monitor and assess their conservation status and to adapt conservation measures at the national and local levels. The present thesis work first investigates rapid, formalised approaches for identifying forest habitats. Then, these approaches are used to study the recent dynamics of forest habitats in relation to two substantial changes that occurred in the past decades, i.e., climate warming and the creation of the Natura 2000 network.We first studied the uncertainties linked to the identification of forest habitats when assigning floristic surveys to habitat types by comparing five expert’s judgements with three automatic classification programs. We highlighted high variability among expert judgements, and comparable efficiency between automatic classification programs and expert judgements. We also demonstrated that a limited number of species was sufficient to identify forest habitats, and that surveys carried out in winter could be used too. We thus created time series of standardised data on forest habitats based on different floristic survey sources, whether assigned to a habitat type or not.Secondly, we created 5,701 pairs of historical (before 1987) and recent (after 1997) floristic surveys, and highlighted that 11% of the pairs located in highlands had shifted towards forest habitats characteristic of warmer climate conditions. The increased dominance of these habitats led us to conclude that thermophilisation was underway in highlands. However, no significant shift was observed in lowlands, hence a substantial difference between the thermal requirements of plant communities and current temperatures: a climatic debt is developing. In the face of these different impacts, we proposed that nature protection public policies could be more efficient if they were implemented and prioritised differently in highlands vs. lowlands.Finally, we studied 155 Natura 2000 sites distributed across mainland temperate and mountainous France, and showed that the number of very large trees in the plots where they were observed had increased significantly more inside the network than outside it since its implementation. We thus evidenced that the conservation measures implemented in Natura 2000 forests, which are managed and exploited, have already had positive effects on very large trees – considered as a characteristic of old-growth forests and also used as biodiversity and conservation status indicators of forest habitats.This thesis work was necessary to complement the numerous studies already available at the species and plant community scales, for it is indispensable to aim for the simultaneous conservation of all the levels of organisation of biodiversity to be efficient. Knowing the scope of validity of the tools used to identify forest habitats, but also understanding the recent dynamics of forest habitats and its influencing factors provide useful data to implement surveillance and adapt public policies and management actions, and thereby reach greater efficiency
Baumgarte, Susanne. "Microbial diversity of soda lake habitats." [S.l. : s.n.], 2003. http://deposit.ddb.de/cgi-bin/dokserv?idn=968508480.
Full textSkarin, Anna. "Reindeer use of alpine summer habitats /." Uppsala : Reindeer Husbandry Unit, Swedish University of Agricultural Sciences, 2006. http://epsilon.slu.se/200673.pdf.
Full textWalker, L. M. "Water table management in wildlife habitats." Thesis, Cranfield University, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.341493.
Full textDaversa, David Robert. "Movement and parasitism in fragmented habitats." Thesis, University of Cambridge, 2016. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.709508.
Full textKim, Stacy L. "Larval dispersal between hydrothermal vent habitats." Thesis, Massachusetts Institute of Technology, 1996. http://hdl.handle.net/1721.1/40566.
Full textNoble, Laine. "Evolution of Dispersal in Patchy Habitats." The Ohio State University, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=osu1448878039.
Full textMoore, Sue E. "Cetacean habitats in the Alaskan Arctic /." Diss., Connect to a 24 p. preview or request complete full text in PDF format. Access restricted to UC campuses, 1997. http://wwwlib.umi.com/cr/ucsd/fullcit?p9823707.
Full textSudyka, Tracee Dee. "Habitats online: A collaborative telecommunications project." CSUSB ScholarWorks, 1997. https://scholarworks.lib.csusb.edu/etd-project/1485.
Full textGALLI, GIOVANNI. "Modelling Mediterranean corals and coralligenous habitats." Doctoral thesis, Università degli Studi di Trieste, 2016. http://hdl.handle.net/11368/2908051.
Full textVillasenor, Jose Fernando. "HABITAT USE AND THE EFFECTS OF DISTURBANCE ON WINTERING BIRDS USING RIPARIAN HABITATS IN SONORA, MEXICO." The University of Montana, 2007. http://etd.lib.umt.edu/theses/available/etd-03282007-165836/.
Full textAnthropogenic disturbance has imposed significant changes in riparian habitats, and is known to have negative effects on biological communities. To assess the effects of human induced disturbance on wintering bird communities, I recorded community composition, relative abundance of species, and three indicators of bird condition in relatively undisturbed and highly disturbed sites at three river systems in Sonora. There is, in general, little effect of disturbance on the composition of wintering communities, with less than 20% of the most common species having significant differences in their abundances between relatively undisturbed and highly disturbed sites. Condition indicators were similar in the two disturbance levels, but the mean heterophil/lymphocyte ratio in the blood of sampled birds showed increased levels of physiological stress in disturbed sites. A more experimental approach is needed to determine the specific cause of the stress expression in leucocytes.
Modification of natural flooding regimes has modified riparian areas, as has been the case in the Colorado River Delta. I present a summary of the changes experienced by riparian systems and some of the measures implemented for riparian restoration in the southwestern United States, and then I compare the scenario with that in central Sonora, where some of the same stressors exist on riparian systems, but where traditional management practices have also mitigated some of the negative consequences of flow control along mid-sized river systems.
Robert, Katleen. "Evaluation of local- and medium-scale habitat heterogeneity as proxy for biodiversity in deep-sea habitats." Thesis, University of Southampton, 2014. https://eprints.soton.ac.uk/374016/.
Full textau, M. Wildsmith@murdoch edu, and Michelle Wildsmith. "Relationships between benthic macroinvertebrate assemblages and habitat types in nearshore marine and estuarine waters along the lower west coast of Australia." Murdoch University, 2007. http://wwwlib.murdoch.edu.au/adt/browse/view/adt-MU20081029.93910.
Full textMarshall, Livingston Sinclair Jr. "Survival of juvenile queen conch, Strombus gigas, in natural habitats: Impact of prey, predator and habitat features." W&M ScholarWorks, 1992. https://scholarworks.wm.edu/etd/1539616765.
Full textFaul, Andre Karel. "Biodiversity enhancement in Cape Flats urban habitats." Thesis, Stellenbosch : University of Stellenbosch, 2005. http://hdl.handle.net/10019.1/2823.
Full textBiodiversity is under enormous pressure from an increasing human population. Urbanisation, agriculture, and mining are just some of the factors responsible for the continuous degradation of the natural environment. Of these, urbanisation is one of the leading factors of diversity loss. To address this problem, it is necessary to understand the relationship between biodiversity and urban areas, as well as the relationship between society and biodiversity. This study focuses on these relationships and suggest ways in which urban biodiversity can be maximised without compromising on development. In order to create an urban environment that successfully supports maximised biodiversity, new methods and ideas must be developed to promote the protection of urban ecosystems. The Cape Floristic Region in South Africa is a good example of an area that requires immediate action in order to prevent enormous losses in biodiversity. Data have shown drastic decreases in natural vegetation cover in this area, and with its close to 9000 species, of which approximately 60% occurs nowhere else in the world. This state of affairs should be regarded as a serious crisis. This study consists of three main parts, the first being a literature review on the current relationships between the urban environment, society, and biodiversity. The second and third parts report on two empirical investigations on the campus of the Faculty of Health Sciences at the University of Stellenbosch in the City of Cape Town. The first of these investigates the possibility of using spirituality connected to nature as a promotional tool for conservation through rehabilitation or restoration of damaged urban vegetation habitats. For this purpose students’ and staff members’ opinions of the urban nature at the campus were tested. In the second investigation the options of restoring biodiversity to the campus was considered by exploring the best options available for rehabilitation while taking the current biodiversity status on and around the premises into account. This was carried out through three smaller projects that included the physical reintroduction of plant species, vegetation analysis, and bird identification and attraction. The response of employees and students at the Faculty of Health Sciences was found to be in favour of restoring vegetation and animal life to the campus. This is supported by a belief that their attitude towards their work would improve with improved natural surroundings. Initial rehabilitation attempts highlighted the complexity of rehabilitation practices by bringing forward challenges and problems experienced with the reintroduction of plant species. Despite these problems, increased plant diversity in experimental areas showed the possibility of successfully completing the project. Biodiversity analysis showed that methods of controlling vegetation used by the university are doing more harm than good, as it results in indigenous vegetation being displaced by exotic vegetation. This study introduces a number of questions regarding the relationship between urbanisation and biodiversity and to what extent the two should be linked. Hopefully it is a step in the direction towards marrying the urban and natural environment, and to create a sustainable urban environment where society no longer sees nature as something outside the city boundaries.
Burdett, Heidi L. "DMSP dynamics in marine coralline algal habitats." Thesis, University of Glasgow, 2013. http://theses.gla.ac.uk/4108/.
Full textDe, Haast James Andrew. "Modelling South African cold-water coral habitats." Master's thesis, Faculty of Science, 2019. http://hdl.handle.net/11427/31361.
Full textVale, Rita Ribeiro de Sousa Lacerda do. "Carnivores and anthropogenic habitats : threats or opportunities?" Master's thesis, Universidade de Aveiro, 2017. http://hdl.handle.net/10773/22662.
Full textO crescimento da população humana tem levado a alterações globais pela transformação de habitats naturais em explorações agrícolas, florestais e áreas urbanizadas. V arias espécies, nomeadamente Carnívoros, encontraram uma forma de se adaptarem a zonas urbanas. Com este estudo pretendemos perceber se os habitats antropogénicos podem ser ameaças ou oportunidades para duas espécies de carnívoros, raposa vermelha (Vulpes vulpes) e gineta comum (Genetta genetta). Para tal, foram recolhidos dados de fatores ambientais dentro de duas áreas circulares de diâmetros fixos, correspondendo á área vital mínima e média de cada espécie e divididos em quatro hipóteses. A influência das variáveis ambientais sobre as duas espécies de carnívoros foi avaliada com base nos dados de abundância relativa e presenç - ausência de raposa e gineta. Os carnívoros foram amostrados com armadilhagem fotográfica. Os resultados mostram que o modelo de perturbação o que melhor explica os padrões de abundância das raposas, e que o modelo híbrido melhor explica a abundância relativa das ginetas. Foram também incluídas variáveis temporais para testar os padrões de atividade das espécies. A nossa hipótese de que a disponibilidade de recursos iria afetar positivamente as espécies foi refutada por não termos considerados os hábitos generalistas destas espécies. A nossa previsão de que zonas de eucalipto e folhosas iriam oferecer refúgio foi contrariada pela escolha de zonas urbanas pela raposa, possivelmente relacionada com a disponibilidade de refúgio e alimento, e a escolha de zonas próximas a eucalipto pela gineta, o que pode ser um falso positivo uma vez que pelo seu comportamento arborícola podem não ser tão facilmente registadas em locais com maior complexidade vegetal. Nós esperávamos que as variáveis antropogénicas tivessem um influência negativa na abundância relativa das espécies. No entanto, os nossos resultados mostram uma associação da raposa a zonas urbanas. A gineta está menos ativa durante o pôr do sol quando há maior atividade humana. A altitude teve um efeito significativo na abundância e presença de ginetas, talvez por estes animais estarem a usar vales, associados a cursos de água. No geral, a raposa parece ser menos afetada por habitats antropogénicos do que a gineta, provavelmente devido a sua capacidade de adaptação. Os habitats antropogénicos podem funcionar como ameaças mas podem ser melhorados para minimizar o seu efeito na vida selvagem e tornarem-se oportunidades. A amostragem de vida selvagem deve ser feita regularmente para a correta implementação de medidas de mitigação, que podem passar por passagens superiores e inferiores nas rodovias, reconfiguração da oresta e educação ambiental.
Human population growth is leading to global changes as natural habitat is transformed into farmlands, industrial forestry stands and urban areas with a negative impact on biodiversity. Several species, including carnivores, found a way to adapt to urban areas. This study aims to understand if anthropogenic habitat are threats or opportunities for two carnivore species: red foxes (Vulpes vulpes) and common genet (Genetta genetta). Data on environmental factor was collected within the average and minimum core area bu er of each species and pertaining to four hypothesis. The in uence of these environmental drivers on the two carnivore species was evaluated using the relative abundance and presence-absence data of red foxes and genets. Carnivores were sampled using camera-trap. Our results show that within both bu ers, the best model in the disturbance category best explains the relative abundance patterns of red foxes, while the the hybrid model (which comprises all best models of all categories) best explained the relative abundance of genets. A category including temporal variables was added to test species activity patterns. This category explained more of the deviance to the null model than spatial variables. We hypothesised that resources availability would have a positive e ect on species but failed to consider red foxes' and genets' generalists feeding behaviour. We predicted that both eucalyptus and broadleaf tree areas would provide refuge for both species. However,red foxes seem to explore urban areas, which can o er food, as genets chose eucalyptus areas as refuge. The latter can be a misleading results as the arboreal behaviour of this species can in uence records. We expected that anthropogenic variables would negatively in uence species' relative abundance and presence. Genets are less active during higher human activity periods, showing higher activity around dawn than around dusk, during most of the year. Altitude had a signi cant e ect on genets' relative abundance and presence. Perhaps because these animals are using river valleys. In general, red foxes seem to be less a ect by anthropogenic habitats then genets, probably because of this species high adaptability. Anthropogenic habitats can work as both threats and opportunities but can be improved in order to minimize its e ect on wildlife. Wildlife surveys should happen frequently in order to implement mitigation measures, such as under or over road passages, forest recon guration and environmental education. With these and other policies, habitats can become opportunities for wildlife.
Stephenson, Fabrice. "Shellfisheries, seabed habitats and interactions in Northumberland." Thesis, University of Newcastle upon Tyne, 2016. http://hdl.handle.net/10443/3482.
Full textde-la-Ossa-Carretero, Jose Antonio. "Assessing sewage disposals in soft-bottom habitats." Doctoral thesis, Universidad de Alicante, 2011. http://hdl.handle.net/10045/24056.
Full textDA, ROS ZAIRA. "Recovery and restoration of marine endangered habitats." Doctoral thesis, Università Politecnica delle Marche, 2020. http://hdl.handle.net/11566/274535.
Full textMarine biodiversity regulates ecosystem functions, which are responsible for the production of goods and services for the biosphere and human well-being. Global changes and human activities are altering ocean biodiversity and ecosystem functioning. At present, stemming from the awareness that conservation and management are often not enough to halt and revert the degradation of threatened ecosystems, it has been recognized that active restoration is crucial to cope with this issue. More knowledge is needed to make restoration actions effective, especially for the largely unknown deep ocean. Two of the main activities that will alter marine habitats are ore exploitation and bottom trawling that, resuspending polymetallic and sediment particles, will affect benthic species. In this thesis, the habitat-forming species Corallium rubrum was exposed to these types of particles. After the removal of the disturbance, its feeding rates and tissue integrity partially recovered. This experiment provides new insights on the consequences of these activities as well as on potential mitigation strategies by properly modulating their intensity and duration. Rearing endangered corals in aquaria can be useful for future projects that aim to restore degraded reefs by transplanting healthy colonies. An appropriate diet may positively impinge on their growth or reproduction success. In this perspective, I studied the food selection of cold-water corals (Desmophyllum pertusum, Madrepora oculata and Dendrophyllia cornigera) was studied and these species showed a preference for the crustacean Mysis relicta. Stable isotope analyses provided also novel information on the trophic niches occupied by these coral species in the Mediterranean Sea. After expanding the knowledge on the habitat or the species to be restored, it is necessary to evaluate the effectiveness of the restoration actions that it might be applied. In this thesis, the effects of two pilot transplantation experiments of the seagrass Cymodocea nodosa and the gorgonian Eunicella singularis on ecosystem functioning of surrounding sediments have been studied. The results showed that transplantation can be effective and that it can have also positive effects on key-ecological processes. However, further studies are needed to assess the potential of scaling-up these actions addressing the present scale of species/habitat loss. This work provides new elements for a better understanding of the potential ecological benefits that can contribute to the conservation of the natural capital.
Bokbot, Youssef. "Habitats et monuments funéraires du Maroc protohistorique." Aix-Marseille 1, 1991. http://www.theses.fr/1991AIX10030.
Full textOur knowledge about protohistoric times in morocco has greatly evolved. Until lately, the scientific community has always denied simply and purely, the use of metals by paleoberber populations before the arrival of the phoenician traders. The data available today allow us to say that the western maghreb knew a cooper age and a bronze age. The two ages are very sensitive to the influences coming from the iberic peninsula. However, documents in favour of a local metallurgical industry exist. The iron age in morocco is characterized by the development of the high habitat with a defensive aspect and the multiplication and the diversification of funerary monuments. These funerary monuments get their prototype either from the iberic peninsula or from the sahara. But there exist also some types of monuments which are characteristic of morocco. Since characteristic documents are not yet found, it is difficult to put a date on the majority of these monuments
Oliveira, Gustavo de. "Mamíferos de maior porte em paisagens tropicais alteradas: seu papel em cascatas tróficas e fatores que determinam sua distribuição." Universidade de São Paulo, 2011. http://www.teses.usp.br/teses/disponiveis/41/41134/tde-05042012-114619/.
Full textIn this dissertation we investigated the role of large mammals in trophic cascades in tropical forests, and the effects of habitat configuration and quality as well as of current human activities on the distribution of large mammals in a rural Atlantic forest landscape. In the first chapter, through a literature review we summarized and evaluated the empirical evidence that mammals are involved in trophic cascades in tropical forest, with the aim of highlighting the progress, problems and challenges in this area. Few conceptual and empirical studies were found in the literature, all of which were performed in the last three decades, while most of the empirical studies were developed in the Neotropics. Most of the hypotheses related to trophic cascades were only proposed and not tested, and considered humans as top predators. Not only most of the quantified variables were not appropriate to demonstrate cascading effects, but also the temporal scale of most studies was short to detect these effects on plant communities composed of long-lived species. We did not find hypotheses addressing the effect of top predators on the populations of small prey through the control of mesopredator density and distribution. Most hypotheses in the reviewed literature refer to other indirect effects played by mammals, especially through seed dispersal and nutrient allocation via feaces. Thus, we demonstrate that the term \"trophic cascade\" has been used widely, encompassing other indirect effects that propagate through other, non-throphic interactions, and that the empirical evidence available so far that mammals are drivers of trophic cascades in tropical forest is weak. In the second chapter, through the sampling of 23 forest fragments and using occupancy models and a model selection approach, we investigated how factors associated with habitat configuration and quality and with other current human activities interact to define the distribution of terrestrial large mammals in human-modified landscapes. The large mammal assemblage from the studied landscape is impoverished and dominated by medium-sized generalist species, suggesting that both the control of mesopredators and forest regeneration may be compromised. Our results also suggest that: (1) the distribution of large mammals is determined mainly by aspects of habitat configuration rather than by aspects of habitat quality, and (2) current human activities are equally or more important than habitat configuration and quality for most of the species. Fragment size and distance to roads, among the factors associated with habitat configuration, and hunting pressure and domestic dog presence, among those associated with current human activities, were particularly important to the distribution of large mammal species. The relevance of current human activities suggests that management strategies that focus on changing people attitudes, through programs of education, can have significant results in terms of the persistence of mammal populations in rural landscapes.
Altfeld, Laura F. "Herbivore Abundance in Simple and Diverse Habitats: The Direct and Indirect Effects of Plant Diversity and Habitat Structure." [Tampa, Fla.] : University of South Florida, 2003. http://purl.fcla.edu/fcla/etd/SFE0000062.
Full textCole, Gemma Marie. "Spatial ecology and habitat use of bobtail lizards (Tiliqua rugosa) in urban and peri-urban habitats across Perth." Thesis, Cole, Gemma Marie (2021) Spatial ecology and habitat use of bobtail lizards (Tiliqua rugosa) in urban and peri-urban habitats across Perth. Honours thesis, Murdoch University, 2021. https://researchrepository.murdoch.edu.au/id/eprint/63410/.
Full textGilliam, David S. "The Diet and Feeding Habits of the Southern Stingray, Dasyatis americana, in Tropical Shallow Marine Habitats." NSUWorks, 1991. http://nsuworks.nova.edu/occ_stuetd/362.
Full textPatranella, Allison. "Artificial Reefs as Juvenile Fish Habitats in Marinas." NSUWorks, 2016. http://nsuworks.nova.edu/occ_stuetd/423.
Full textLindgren, Jessica. "Small remnant habitats : Important structures in fragmented landscapes." Doctoral thesis, Stockholms universitet, Institutionen för naturgeografi, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-148653.
Full textResearch funder Ekoklim. Project:4339602.
At the time of the doctoral defense, the following paper was unpublished and had a status as follows: Paper 4: Manuscript.
Wong, M. H. "Toxicity assessments and biological reclamation of damaged habitats." Thesis, University of Strathclyde, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.397906.
Full textTurnbull, Alison. "The optical properties of acquatic habitats and phytoplankton /." Title page, abstract and contents only, 1988. http://web4.library.adelaide.edu.au/theses/09SB/09sbt942.pdf.
Full textDunn, Shane C. "Acoustic classification of benthic habitats in Tampa Bay." [Tampa, Fla.] : University of South Florida, 2007. http://purl.fcla.edu/usf/dc/et/SFE0002297.
Full textLukas, Kristen Elizabeth. "The effects of alternating habitats on gorilla behavior." Thesis, Georgia Institute of Technology, 1995. http://hdl.handle.net/1853/30538.
Full textSmall, Cleo Jane. "Waders, habitats and landscape in the Pennine Dales." Thesis, Lancaster University, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.414889.
Full textRein, Henk B. van. "Monitoring methods for assessing change in seabed habitats." Thesis, University of Ulster, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.553879.
Full textWaring, Paul. "Abundance and diversity of moths in woodland habitats." Thesis, Oxford Brookes University, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.277095.
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