Dissertations / Theses on the topic 'Ecological Niche Factor Analysis'
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Williams, Alison Kay. "The influence of probability of detection when modeling species occurrence using GIS and survey data." Diss., Virginia Tech, 2000. http://hdl.handle.net/10919/11129.
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Storey, Liza Preethy. "Effects of climate and land use change on invasive species a case study of Tradescantia fluminensis (Vell.) in New Zealand /." The University of Waikato, 2009. http://hdl.handle.net/10289/2634.
Full textWhitehead, Joanna K. "Breeding success of adult female kakapo (Strigops habroptilus) on Codfish Island (Whenua Hou) : correlations with foraging home ranges and habitat selection." Lincoln University, 2007. http://hdl.handle.net/10182/640.
Full textLefevre, Robert E., and Kevin Halverson. "Ecological Sustainability Analysis of the Coronado NF: Describing the Ecological Niche of the Forest for Water and Riparian Resources." Arizona-Nevada Academy of Science, 2007. http://hdl.handle.net/10150/296684.
Full textKulhanek, Stefanie. "Investigating the use of invasion history, meta-analysis and niche-based models as tools for predicting the ecological impacts of introduced aquatic species." Thesis, McGill University, 2009. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=66655.
Full textLes invasions biologiques posent un risque majeur pour la biodiversité mondiale. Malgré qu'il y ait un intérêt grandissant concernant les impacts causés par les espèces non indigènes (ENI), des outils de prédictions de leurs effets écologiques restent encore à être développés. Plusieurs chercheurs ont suggéré que l'étude des impacts antérieurs des ENI, nommé historique d'invasion, pourrait servir en tant que référence pour prédire leurs effets futurs. Et malgré que des modèles de prédictions aient été développés selon l'historique d'invasion de certaines espèces envahissantes notoires, la précision globale de tels outils reste à être démontrée. La sévérité des impacts causés par les ENI peut varier selon leur abondance à travers des milieux envahis. Ainsi, par la prédiction de l'abondance des ENI, à travers des sites potentiellement envahissables, nous devrions être en mesure d'identifier les habitats particulièrement vulnérables face à leurs effets. En dépit que les modèles de niches fondées écologiques (MNE) aient souvent été utilisés pour prédire l'abondance des espèces dans leur aire de répartition d'origine, de telles approches ont rarement été mises en application envers des ENI. Dans cette thèse, j'entreprends une revue étendue des publications scientifiques concernant les ENI. En utilisant 19 espèces aquatiques comme échantillon, j'évalue l'utilité de l'historique d'invasion comme outil pour prévoir leurs impacts futurs. Je démontre que la plupart des données sur les impacts des ENI sont restreintes et hétérogènes, limitant le développement des prédictions quantitatives, mais que l'historique d'invasion peut souvent révéler le type et la direction et des impacts futurs. En utilisant un de ces ENI, Cyprinus carpio, comme sujet d'étude, je conduis une méta analyse et démontre que, où les données sont disponibles, les mod
Messias, Patrícia. "Delimitação de espécies do complexo Aspidosperma pyrifolium Mart. & Zucc. (Apocynaceae)." Botucatu, 2019. http://hdl.handle.net/11449/182518.
Full textResumo: Aspidosperma pyrifolium Mart. & Zucc. é uma espécie com distribuição ampla e disjunta, variação morfológica e taxonomia complexa. Neste estudo é tratada como um complexo de espécies, e utilizada como modelo para delimitação de espécies através de múltiplos critérios operacionais (genéticos, morfológicos e ecológicos). Consideramos que espécies são segmentos de linhagens de uma metapopulação evoluindo separadamente, pois este é um conceito universal que diminuiu as visões conflitantes do que é considerado espécie. Realizamos análises filogenéticas com dados concatenados (ITS e rpl32-trnL) e de coalescência para testar o monofiletismo do complexo e seus grupos. Desenvolvemos marcadores microssatélites polimórficos para A. pyrifolium usados na avaliação da diversidade genética e estruturação de cinco populações naturais. Analisamos a morfologia através de morfometria, incluindo características quantitativas, tanto vegetativas quanto reprodutivas. As análises ecológicas, incluíram modelagem e testes de similaridade de nicho ecológico. Nossos resultados recuperaram o complexo A. pyrifolium como monofilético, com 3 subclados relacionados a regiões geográficas e vegetações específicas, resultados também corroborados na árvore de espécies. O clado 1 ocorre na Caatinga no Nordeste do Brasil, o clado 2 nas manchas de Floresta Estacional na região Centro-Oeste no Brasil e clado 3 na vegetação chaqueana no Mato grosso do Sul, Paraguai e Bolívia. Todas as análises de estrutura populaciona... (Resumo completo, clicar acesso eletrônico abaixo)
Abstract: Aspidosperma pyrifolium Mart. & Zucc. is a species with wide distribution and disjunct, morphological variation and complex taxonomy. In this study, we treated it as a species complex, and used as a model for species delimitation using multiple operational criteria (genetic, morphological and ecological). We consider species as segments of separately evolving metapopulation lineages, since this is a universal concept that diminished the conflicting visions of what is considered species. For this, we performed phylogenetic with concatenated data (ITS and rpl32-trnL) and coalescence analyzes to test the monophyly of the complex and its groups. We developed polymorphic microsatellites for complex A. pyrifolium for evaluated the genetic diversity and structure of five natural population. We analyzed morphology through morphometry, including quantitative characteristics, both vegetative and reproductive. The ecological analyzes included modeling and testing of ecological niche similarity. Our results recovered Aspidosperma pyrifolium complex as monophyletic, with 3 subclades related to geographic regions and specific vegetation, results also corroborated in the species tree. Clade 1 occurs in the Caatinga in Northeast Brazil, clade 2 in the Seasonal Forest patches in the Center-West region of Brazil and clade 3 in the Chaqueana vegetation in Mato Grosso do Sul, Paraguay and Bolivia. All analyzes of population structure suggested the formation of two genetic groups, one with the po... (Complete abstract click electronic access below)
Doutor
Bachmann, Beatrice Yvonne [Verfasser], Martin [Akademischer Betreuer] Kappas, and Oliver [Akademischer Betreuer] Tackenberg. "Extraction and Analysis of Baseline Data for Protected Area Management Using Geographic Information Systems, Remote Sensing and Ecological Niche Modeling : Case Study: Armando Bermúdez National Park in the Cordillera Central of the Dominican Republic / Beatrice Yvonne Bachmann. Gutachter: Martin Kappas ; Oliver Tackenberg. Betreuer: Martin Kappas." Göttingen : Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2012. http://d-nb.info/1042346542/34.
Full textSouza, Renato Pereira de. "Filogeografia da febre amarela na América do Sul." Universidade de São Paulo, 2013. http://www.teses.usp.br/teses/disponiveis/6/6132/tde-19042013-141517/.
Full textThe flaviviruses are viruses of 40-50 nm in diameter, with spherical shaped and single-strand RNA with positive sense and approximately 11 kb in length. The Yellow Fever virus is the prototype of the group and the causative agent of Yellow Fever, a disease which caused widespread epidemics in Africa, North America, South America and Europe of the seventeenth century to the early twentieth century. The disease reemerged in recent decades in sub-Saharan Africa and tropical South America. This manuscript aims to reconstruct, in time and space, the transmission of yellow fever in South America, through the applying of a Bayesian inference model, considering the probable influence of human populations, nonhuman primates and mosquitoes on the evolution and distribution of Yellow Fever genetic lineages. Distributional pattern hypothesis will be tested by computational modeling of ecological niche. The data provide little evidence that current vaccination strategies have effectively contributed to reducing the occurrence of Yellow Fever, indicating possible errors in the vaccination strategy. From the analysis of the Yellow Fever population Coalescence, the viral population showed a significant decrease started in the mid-90s. The phylogeographic analysis suggests a general pattern of transmissibility \"Source-Sink\" highlighting the Amazon region as a source of diversity for the other areas studied, with a secondary phylogeographic wave like structure. Thus, the introductions of the virus into areas outside the Amazon has random occurrence and can be linked temporally and geographically to the north of South America The geographical distribution models corroborate this pattern and indicate a broad possible area for Yellow Fever circulation, encompassing many ecotones. The results indicate a possible long-term effect of vaccination acting directly on the evolution and phylogenetic dynamics of Yellow Fever and suggests that monitoring the evolution of the Yellow Fever virus is a valid strategy to understand the geographical distribution and highlight complex transmission mechanisms and spatial movements. In turn Ecological Niche models showed as an appropriate tool to calculate disease risk in certain areas without previous occurrence of the disease, working as a predictive model for Surveillance institutions prepare their strategies for prevention and control in the case of possible pathogen introduction
Inoue, Kentaro. "A Comprehensive Approach to Conservation Biology: From Population Genetics to Extinction Risk Assessment for Two Species of Freshwater Mussels." Miami University / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=miami1437683696.
Full textLucas, D. Pulane. "Disruptive Transformations in Health Care: Technological Innovation and the Acute Care General Hospital." VCU Scholars Compass, 2013. http://scholarscompass.vcu.edu/etd/2996.
Full textROW, JEFFREY. "Origins of genetic variation and population structure of foxsnakes across spatial and temporal scales." Thesis, 2011. http://hdl.handle.net/1974/6271.
Full textThesis (Ph.D, Biology) -- Queen's University, 2011-01-11 10:40:52.476
Kywe, Tin Zar. "Habitat Suitability Modeling for Tiger (Panthera tigris) in the Hukaung Valley Tiger Reserve, Northern Myanmar." Doctoral thesis, 2012. http://hdl.handle.net/11858/00-1735-0000-000D-F05C-E.
Full textWang, Weijia. "Control of Adult Bone Marrow Erythroid Progenitor Cell Fate by Combinatorial Niche Factor Signals." Thesis, 2012. http://hdl.handle.net/1807/36300.
Full textBurrill, Adrian. "Ecological niche metrics of coral reef piscivorous fishes: The effects of fishing revealed through stable isotope analyses." Thesis, 2014. http://hdl.handle.net/1828/5333.
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burrilladrian@gmail.com
Sixaba, Zinzisa. "Backpacker tourism: an analysis of travel motivation." 2013. http://hdl.handle.net/11394/3876.
Full textBackpacker tourism is a niche market of tourism that has been rapidly growing, South Africa in particular has become an increasingly popular destination for backpacker tourism (Visser 2004). Academic interest in backpacker tourism research has grown in recent years, although the current literature on backpacker tourism has focused on the economic significance and impacts with little empirical research conducted on the characteristics, motivations and behaviors. Cohen (2003) stresses that future research should stop referring to backpacking as if it were a homogeneous phenomenon, and should rather focus on its diverse manifestations in terms of origins, age, gender, class, nationality and cultural backgrounds of backpackers. Since backpacker tourism is a growing market it is important for the destination to understand the specifics and capabilities of the market in order to create sustainable products. The main aim of this research is to segment the backpacker tourism market in South Africa, in order to ascertain if any significant sub-groups exist. Both qualitative and quantitative methods were utilised to collect data including a distribution of 202 questionnaire surveys to backpackers within backpacker hostels and also participant observation was employed to gain an in-depth understanding of the phenomena. Factor and cluster analysis was used to analyse the data. The following motive-based segments were identified: Self-developers/ Learners, Experience Seekers, Escapers/ Independence, Adventures/ Social Seekers. The results revealed that these segments do illustrate an increase in the heterogeneity of backpacker tourism. The reason these sub-groups of backpackers are depicted in South Africa is to address the underlying desires of backpackers in order to satisfy their needs.
"Context-dependent niche variation and fitness consequences in California sea lions." Master's thesis, 2013. http://hdl.handle.net/2286/R.I.17887.
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M.S. Biology 2013
Lee, Mei-Hsia, and 李梅霞. "Analysis Ecological Factor of Bedding Sites Selection by Formosan Sika Deer(Cervus nippon taiouanus)in Kenting National Park." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/85693406844096554876.
Full text國立臺北教育大學
自然科學教育學系碩士班
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Because of population extinction of wild formosan Sike deer (Cervus nippon taiouanus) in 1969, Kenting National Park launched a Sika deer restoration program in 1984. In the year from 1994 to 1997, Sike deer was released to the field. Currently, homerange of the deer has expanded to 4000 hectares. So, we put eyes on the sphere of activities about Formosan Sika deer and investigate into line transect survey. Therefore, we carried out the research in dry and wet seasons, finding 47 sites in five months of dry seasons and 44 sites in six months of wet seasons. The rain scouring may be the reason causing less number in wet seasons. For terrain, Sika deer prefer to choose crest line as their bedding sites, where provide broad eyesight and escape natural enemy easily. For gradient, the resting places in flat-place occupied higher rate, where is more comfortable for Sika deer. Furthermore, the condition of surface for Sika deer, the bedding sites of lawn and bare earth accounted for 50% respectively have higher rate. For the density of boscage, the sparse places has higher rate. Moreover, the vegetation for sida deer, preferring to choose deciduous forest not grasslands. In addition, they prefer to secret places where covered thicket as their shelter. Besides Sika deer prefer to high wind speed place. All of above show that Sika deer have about their bedding sites which has relationship with escaping natural enemies and the temperature control.
Duggan, Emily Clare. "Assessing the behavioral aspects of executive functioning across the lifespan: review of rating scales and psychometric derivation of a screener for young adults." Thesis, 2014. http://hdl.handle.net/1828/5656.
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eduggan@uvic.ca
Bachmann, Beatrice Yvonne. "Extraction and Analysis of Baseline Data for Protected Area Management Using Geographic Information Systems, Remote Sensing and Ecological Niche Modeling Case Study: Armando Bermúdez National Park in the Cordillera Central of the Dominican Republic." Doctoral thesis, 2011. http://hdl.handle.net/11858/00-1735-0000-0006-B306-4.
Full textLiu, Zishu. "Microbial community properties and mechanisms of assembly in managed ecosystems." 2019. https://ul.qucosa.de/id/qucosa%3A34719.
Full textSchiller, Frank. "Diskurs und Nachhaltigkeit." Doctoral thesis, 2003. http://hdl.handle.net/11858/00-1735-0000-0006-B237-D.
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