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Dissertations / Theses on the topic 'Population and ecological genetics'

Author: Grafiati

Published: 4 June 2021

Last updated: 14 February 2022

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1

Andres, Adriana N. "The ecological genetics of Poa trivialis L." Thesis, University of Reading, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.280476.

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2

Battocletti, Amy. "The Population and Ecological Genetic Effects of Habitat Fragmentation." Thesis, Georgetown University, 2017. http://pqdtopen.proquest.com/#viewpdf?dispub=10273271.

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<p> Maintaining intraspecific variation is important for populations’ long-term success and is increasingly being recognized as an important conservation goal. Populations in anthropogenically fragmented habitats may lose variation rapidly via genetic drift, particularly in small fragments with a high ratio of edge to interior habitat. We studied the population and ecological genetic effects of habitat fragmentation on both a foundation plant, <i>Spartina patens,</i> and a dependent herbivore, <i>Tumidagena minuta,</i> using a naturally fragmented, salt marsh model system. We employed mi

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3

Baker, Kathleen. "The ecological genetics of Armeria maritima (Miller) Willd." Thesis, University of Newcastle Upon Tyne, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.260967.

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4

Jacobs, Arne. "The population genomic origins of ecological specialisation in salmonid fishes." Thesis, University of Glasgow, 2018. http://theses.gla.ac.uk/30678/.

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Understanding the origin of biodiversity is a central question in evolutionary biology. Ecological specialisation, including the repeated rapid and parallel evolution of ecological specialists (‘ecotypes’), is a major source of biodiversity. The parallel evolution of ecotypes in salmonid fishes, such as Arctic charr, brown trout and European whitefish, has resulted in extensive diversity in northern postglacial freshwater ecosystems. Despite their ecological diversity and importance for northern ecosystems, the knowledge on the genetic basis of ecological specialisation, the evolutionary histo

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5

Harkins, Gordon W. "Studies on the population genetics of Euphausiids: a comparison of patterns in plagic taxa displaying different distributions and life-histories." Thesis, University of the Western Cape, 2006. http://etd.uwc.ac.za/index.php?module=etd&action=viewtitle&id=gen8Srv25Nme4_6509_1184928511.

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<p>The systematic and population genetic relationships were characterised for three ecologically related euphausiid species: Euphausia lucens, E. recurva and E. vallentini. These species have different geographical distributions and life histories. All three species have a circumpolar distribution in the Southern Hemisphere while E. recurva is also distributed in the North Pacific. DNA sequence variation was determined for three regions of mitochondrial DNA and a single nuclear gene. It was conclusively demonstrated that both E. lucens and E. vallentini represent valid taxonomic species with f

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6

Star, Bastiaan, and n/a. "Space matters : modeling selection in spatially heterogeneous environments." University of Otago. Department of Zoology, 2008. http://adt.otago.ac.nz./public/adt-NZDU20080507.151534.

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Selection in spatially heterogeneous environments is a convenient explanation for the high levels of genetic variation observed in natural populations. Indeed, theoretical studies predict that spatial heterogeneity leads to higher levels of variation in a variety of selection models. These models, however, have assumed quite restrictive parameters (e.g., two alleles, fixed gene flow and specific selection schemes). Therefore, the effect on spatial heterogeneity is still poorly understood for a wider range of parameters (e.g., multiple alleles, different levels of gene flow and more general sel

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7

Husby, Arild. "Ecological genetics of populations experiencing changing environmental conditions." Thesis, University of Edinburgh, 2010. http://hdl.handle.net/1842/5672.

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A major goal in evolutionary biology is to understand how ecological factors shape the phenotypic and genetic variation that we observe in natural populations and in this thesis I examine how rapid changes in temperature have influenced phenotypic and genetic variation in morphological and life history traits in long-term studies of great tits. In Chapter 1 I review what is known about the effects of environmental change on natural populations, and outline the quantitative genetic framework that is available to study genetic variation in natural populations. Much focus on the effects of climat

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8

Heliyanto, Bambang. "The ecological genetic consequences of local endemism and natural population fragmentation in Banksia ilicifolia (Proteaceae)." University of Western Australia. School of Plant Biology, 2006. http://theses.library.uwa.edu.au/adt-WU2006.0123.

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[Truncated abstract] The species-rich Southwest Australian Floristic Region (SAFR) is a global biodiversity hotspot. Characterised by a Mediterranean-type climate and nutrient deficient landscape, this region is endowed with 7380 native vascular plant species/sub species, of which 49% are endemic and 2500 are of conservation concern. Despite the global significance of this region, there is still only a poor understanding of the factors influencing high diversity and endemism, and especially the population genetic consequences of narrow endemism and naturally fragmented species distribution. Ho

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Cortés-Palomec, Aurea C. "Ecological factors, mixed breeding system, and population genetic structure in a subtropical and a temperate violet species." Connect to this title online Connect to resource online, 2005. http://www.ohiolink.edu/etd/view.cgi?ohiou1125612956.

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10

Barlow, Emily J. "Ecological and genetic perspectives on dispersal in European shags (Phalacrocorax aristotelis)." Thesis, University of Aberdeen, 2011. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=182248.

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Dispersal is a fundamental ecological and evolutionary process that can create demographic and genetic linkage between neighbouring and distant locations, influencing the dynamics, structure and ultimately the persistence of populations. To understand observed population dynamics and structure and to predict future change, accurate and comprehensive data are required describing the pattern and magnitude of dispersal and gene flow across all relevant spatial scales. However, this is a major empirical challenge. In this thesis, I aimed to obtain comprehensive empirical data quantifying natal dis

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Hole, David G. "The population ecology and ecological genetics of the house sparrow Passer domesticus on farmland in Oxfordshire." Thesis, University of Oxford, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.249476.

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12

Chen, Gang. "Cryptic diversity, ecological differentiation and population genetics of an estuarine copepod, (Acartia tonsa) dana 1849 (Copepoda: Calanoida)." College Park, Md.: University of Maryland, 2009. http://hdl.handle.net/1903/9495.

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Thesis (Ph. D.) -- University of Maryland, College Park, 2009.<br>Thesis research directed by: Behavior, Ecology Evolution and Systematics Program. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.

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Cordeiro, Erick M. G. "Patterns of infestation, dispersion, and gene flow in Rhyzopertha dominica based on population genetics and ecological modeling." Diss., Kansas State University, 2016. http://hdl.handle.net/2097/32642.

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Doctor of Philosophy<br>Department of Entomology<br>James F. Campbell<br>Thomas W. Phillips<br>Movement is a fundamental feature of animals that impacts processes across multiple scales in space and time. Due to the heterogeneous and fragmented nature of habitats that make up landscapes, movement is not expected to be random in all instances, and an increase in fitness is an expected consequence for those that can optimize movement to find valuable and scarce recourses. I studied the movement of Rhyzopertha dominica (Coleoptera: Bostrichidae), one of the most important pests of stored grain wo

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Chao, Vincent 1973. "Ecological and sexual divergence in experimental populations of Chlamydomonas." Thesis, McGill University, 2001. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=32982.

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Laboratory studies on speciation have revealed that selection must be disruptively applied on traits related to the mating system in order to produce deviations from random mating in experimental populations. One problem with these experiments, however, has been the complexity of the model organism used, most frequently Drosophila species. Due to the multi genic nature of the mating systems of such organisms, it has been difficult to obtain the necessary gene combinations that result in complete sexual isolation. In the present study, I have used a simple sexual organism, the unicellular green

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15

Pearson, Neil. "Ecological genetics of Arabidopsis thaliana from reservoir populations in low-disturbance habitats." Thesis, University of Warwick, 2013. http://wrap.warwick.ac.uk/61699/.

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The Arabidopsis HapMap project, and follow-on work carried out by the Bergelson and Nordborg groups, established in broad outline the demographic history and population structure of wild Arabidopsis thaliana. Genome‐wide association studies are likewise making considerable advances in identifying genes associated with ecologically significant traits, and thus in identifying candidate genes likely to be under the action of natural selection. The aim of this project has been to further expand and combine these lines of investigation, by using genomic data to test ecological hypotheses and to gra

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Nakamura, Noritaka. "Taxonomic and ecological studies on the root endophytic hyaloscyphaceous fungi associated with Fagaceae trees in Japanese secondary forests." Kyoto University, 2018. http://hdl.handle.net/2433/232350.

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Kyoto University (京都大学)<br>0048<br>新制・課程博士<br>博士(農学)<br>甲第21149号<br>農博第2275号<br>新制||農||1059(附属図書館)<br>学位論文||H30||N5123(農学部図書室)<br>京都大学大学院農学研究科地域環境科学専攻<br>(主査)教授田中千尋, 教授本田与一, 准教授刑部正博<br>学位規則第4条第1項該当

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Rice, Amber Marie Pfennig David William. "Ecological character displacement and its consequences population genetic analyses in spadefoot toads /." Chapel Hill, N.C. : University of North Carolina at Chapel Hill, 2008. http://dc.lib.unc.edu/u?/etd,1884.

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Thesis (Ph. D.)--University of North Carolina at Chapel Hill, 2008.<br>Title from electronic title page (viewed Dec. 11, 2008). "... in partial fulfillment of the requirements for the degree of Doctor of Philosophy in the Department of Biology." Discipline: Biology; Department/School: Biology.

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18

Rascle, Pauline. "Biologie et écologie d'une population isolée : exemple d'Eryngium viviparum et perspectives pour sa conservation en France." Thesis, Brest, 2018. http://www.theses.fr/2018BRES0075/document.

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L'isolement géographique est une menace élevée pour le maintien des populations sur le long terme. Il est donc primordial de comprendre selon quel degré la viabilité des populations est affectée par leur isolement, notamment en vue de définir des priorités en terme de conservation. Eryngium viviparum J.Gay (Apiaceae) est une des espèces végétales les plus menacées d'Europe avec une distribution ibéro-armoricaine très fragmentée. En France, son statut de conservation est devenu particulièrement critique avec la disparition de la presque totalité de ses populations au cours des années 1980, à l'

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Merrill, Keith R. "Usage and Development of Molecular Markers for Investigation of the Population and Ecological Genetics of Bromus tectorum L." BYU ScholarsArchive, 2011. https://scholarsarchive.byu.edu/etd/2955.

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This thesis includes two studies: The first examined patterns of neutral genetic diversity within Bromus tectorum L. across the IMW region, and uses patterns of microsatellite (SSR) genotype distribution to make inferences about the respective roles of adaptively significant genetic variation, adaptive phenotypic plasticity, and facultative outcrossing in the ongoing invasion and recent range expansion of B. tectorum. It has been previously demonstrated that, due to extremely low outcrossing rates, it is possible to characterize individual genotypes of this species using four SSR loci. We samp

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Farrar, Victoria Sophia. "Evolution of Novel Color Phenotypes During Population Establishment: Genetic, Biochemical, and Ecological Considerations." Thesis, The University of Arizona, 2015. http://hdl.handle.net/10150/579036.

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When do novel adaptations arise as rearrangements of ancestral components and when do they arise de novo? Answering this question requires direct study of the proximate mechanisms behind novel phenotypes that arise from diverse starting points along different historical contingencies. Here we capitalize on uniquely replicated historical sequences of population establishment in the house finch (Haemorphous mexicanus) to study the evolution of color-producing enzymatic pathways that underlie population divergence in color phenotypes. We first evaluated genetic diversity and differentiation in a

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21

Yayan, Wahyu Candra Kusuma. "Ecological and genetic studies of endangered plant species, Vatica bantamensis and Rafflesia spp., for developing optimal conservation strategies in Indonesia." Kyoto University, 2019. http://hdl.handle.net/2433/244560.

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22

Dubé, Caroline Eve. "Life History of Millepora Hydrocorals : New Ecological and Evolutionary Perspectives from Population Genetic Approaches." Thesis, Paris, EPHE, 2016. http://www.theses.fr/2016EPHE3075/document.

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Évaluer les stratégies d’histoire de vie d’espèces est indispensable à leur conservation. Un total de 3651 colonies de corail de feu, Millepora platyphylla, ont été mesurées, géoréférencées et collectées dans 5 habitats différents à Moorea afin d’évaluer le contexte biologique et écologique du maintien et du renouvellement des populations. Ce travail de thèse a démontré que la structure des populations diverge entre le lagon et la pente externe. À l’aide de marqueurs microsatellites nouvellement développés, nous avons démontré que cette espèce se reproduit principalement par fragmentation (80%

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Eldon, Desiree Rochelle. "Population Genetic Structure of Bromus tectorum in the American Desert Southwest." BYU ScholarsArchive, 2013. https://scholarsarchive.byu.edu/etd/4273.

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Following its introduction to North America in the late nineteenth century, Bromus tectorum L., an inbreeding invasive winter annual grass, has become dominant on millions of hectares of sagebrush steppe habitat throughout Intermountain Western North America. It appears that within the last 30-40 years, B. tectorum has expanded its range southward into the Mojave Desert and also into more climatically extreme salt desert environments. Previous research using microsatellite markers and experimental studies has suggested that lineages found in desert habitats are genetically distinct from those

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24

Floyd, Christian Hollace. "Ecological genetics of dispersal and mating system in populations of yellow-bellied marmots (Marmota flaviventris) /." For electronic version search Digital dissertations database. Restricted to UC campuses. Access is free to UC campus dissertations, 2003. http://uclibs.org/PID/11984.

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Wenzel, Aaron. "Systematics of Penstemon section Ericopsis, a group of plant species native to the Intermountain West." The Ohio State University, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=osu1471533204.

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26

Louis, Marie. "Social, ecological and genetic structures of bottlenose dolphins, Tursiops truncatus, in the Normano-Breton gulf and in the North-East Atlantic." Thesis, La Rochelle, 2014. http://www.theses.fr/2014LAROS015/document.

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Les patrons de structuration des espèces animales à fine et à large échelles peuvent être façonnés par des facteurs environnementaux et des traits comportementaux individuels. Les objectifs de cette thèse combinant des approches sociales, génétiques, isotopiques et morphométriques sont de décrire et comprendre i) les structures sociale, écologique et génétique de la population de grands dauphins du golfe Normand-Breton (NB) et ii) la structure de population de l'espèce à l'échelle de l'Atlantique Nord-Est (ANE). Les grands dauphins du golfe NB forment une unique population génétique qui est co

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27

Wauters, Nina. "Genetical and ecological aspects of the invasion of the tropical fire ant Solenopsis geminata in the Galapagos Islands." Doctoral thesis, Universite Libre de Bruxelles, 2015. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/209088.

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Invasive species represent a major challenge through their consequences on<p>biodiversity, human health and economy. Their effects are especially important on fragile and<p>unique insular biotas such as the Galápagos Islands. Ants in particular are keystone species<p>implicated in ecosystem functioning and biodiversity and they can be dramatic invaders. In<p>the Galápagos Islands, the tropical fire ant Solenopsis geminata is considered a high-impact<p>invasive species, though it remains surprisingly poorly studied. The objectives of this work<p>are to document the invasion of S. geminata in th

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Smith, Gilbert. "Investigating the molecular basis of adaptation and speciation in divergent populations." Thesis, University of St Andrews, 2013. http://hdl.handle.net/10023/3678.

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The creation of biodiversity involves the evolution of new species. Recent trends in the study of speciation have increased the emphasis on the role of ecology in adaptation and the evolution of reproductive isolation. This includes examining the relative contributions of different types of selection, the role of gene flow and the genomic changes that occur during ecological speciation. The search for speciation genes continues, however our growing knowledge of how the genome translates into phenotypes means we should now consider a broader molecular basis of speciation, which includes genetic

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Helyar, Sarah Jane. "Estimating ecological and population genetic parameters in Myodes glareolus, a mammal with cryptic reproduction and dispersal." Thesis, University of Liverpool, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.485854.

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S .J. Helyar; Estimating ecological and population genetic parameters in Myodes glareolus, a mammal with cryptic reproduction and dispersal A central theme in ecology is the determination of the factors that regulate population dynamics. For many years research has focused on systems regulated by predation, competition or resource Iimitatiofl, while the host parasite relationship wa~ considered to be neutral or benign, due to host-parasite co-evolution. However, in recent years there has been increasing recognition that parasites can have a key role in population dynamics, by influencing the k

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Pulgarín-Restrepo, Paulo César, and University of Lethbridge Faculty of Arts and Science. "The population history of the downy woodpecker (Picoides pubescens) in North America : insights from genetics, ecological niche modeling and bioacoustics / Paulo C. Pulgarín-Restrepo." Thesis, Lethbridge, Alta. : University of Lethbridge, Dept. of Biological Sciences, c2011, 2011. http://hdl.handle.net/10133/2613.

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The last Quaternary ice age strongly influenced the distribution of most plants and animals. Here I used genetics, ecological niche modeling and bioacoustics to understand the possible historical patterns behind the current distribution of the Downy Woodpecker (Picoides pubescens) in North America. Analyses of mtDNA sequences and seven microsatellites loci suggest low genetic differentiation among populations (a maximum of two genetic groups), however population structure is subtle. Ecological niche modeling suggests several refugia SE of US, and some restricted areas east and west of the Rock

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31

Dray, F. Allen Jr. "Ecological genetics of Melaleuca quinquenervia (Myrtaceae) : population variation in Florida and its influence on performance of the biological control agent Oxyops vitiosa (Coleoptera: Curculionidae)." FIU Digital Commons, 2003. http://digitalcommons.fiu.edu/etd/3085.

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Melaleuca quinquenervia (Cav.) Blake (Myrtaceae) was imported into Florida from Australia over a century ago as a landscape plant. A favorable climate and periodic wildfires helped M. quinquenervia thrive; it now occupies about 200,000 hectares in southern Florida. A biological control (i.e., biocontrol) program against M. quinquenervia has been initiated, but not all biocontrol releases are successful. Some scientists have argued that poor biocontrol agent success may relate to genetic differences among populations of invasive weeds. I tested this premise by determining (1) the number and ori

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Truelove, Nathan. "The conservation genetics of ecologically and commercially important coral reef species." Thesis, University of Manchester, 2014. https://www.research.manchester.ac.uk/portal/en/theses/the-conservation-genetics-of-ecologically-and-commercially-important-coralreef-species(8195a828-2305-430c-9997-548030e417ca).html.

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Identifying the extent to which coral reef species are connected by dispersal is a fundamental challenge for developing marine conservation strategies. Many coral reef species are relatively sedentary as adults, yet have a pelagic larval phase where larvae can potentially be widely dispersed by ocean currents. This thesis focuses on the role of ocean currents in driving spatially explicit patterns of population connectivity among ecologically and commercially important coral reef species by combining research tools from population genetics, oceanography, and biophysical modeling. Despite the s

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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.

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Cortés-Palomec, Aurea C. "Ecological Factors, Mixed Breeding System and Population Genetic Structure in a Subtropical and a Temperate Violet Species." Ohio University / OhioLINK, 2005. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1125612956.

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Schutze, Mark Kurt. "The significance of genetic and ecological diversity in a wide-ranging insect pest, Paropsis atomaria Olivier (Coleoptera: Chrysomelidae)." Queensland University of Technology, 2008. http://eprints.qut.edu.au/16666/.

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Paropsis atomaria (Coleoptera; Chrysomelidae) is a eucalypt feeding leaf beetle endemic to southern and east coast Australia, and it is an emergent pest of the eucalypt hardwood industry. Paropsis atomaria was suspected to be a cryptic species complex based on apparent differences in life history characteristics between populations, its wide geographical distribution, and extensive host range within Eucalyptus. In this study genetic and ecological characters of P. atomaria were examined to determine the likelihood of a cryptic complex, and to identify the nature and causes of ecological variat

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Figueira, Cláudia Alexandra Rodrigues Marques. "Comparison of different methods to detect genetic barriers in a small mammal population." Master's thesis, Universidade de Aveiro, 2016. http://hdl.handle.net/10773/15871.

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Mestrado em Ecologia Aplicada<br>Habitat fragmentation and the consequently the loss of connectivity between populations can reduce the individuals interchange and gene flow, increasing the chances of inbreeding, and the increase the risk of local extinction. Landscape genetics is providing more and better tools to identify genetic barriers.. To our knowledge, no comparison of methods in terms of consistency has been made with observed data and species with low dispersal ability. The aim of this study is to examine the consistency of the results of five methods to detect barriers to gene flow

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Jackson, Katherine Sarah. "The population dynamics of a hybrid zone in the Alpine grasshopper Podisma pedestris : an ecological and genetic investigation." Thesis, University College London (University of London), 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.288321.

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Cavaleiro, Nathalia Pereira. "Ecologia molecular de ostras (Crassostrea spp.) do Atlântico Tropical." Universidade do Estado do Rio de Janeiro, 2013. http://www.bdtd.uerj.br/tde_busca/arquivo.php?codArquivo=6139.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>Crassostrea (Sacco, 1897) é o gênero mais importante do mundo de ostras de cultivo e consiste de 34 espécies distribuídas pelas regiões tropicais e temperadas do globo. C. gasar e C. rhizophorae são as duas espécies nativas que estão distribuídas ao longo de toda a costa do Brasil até o Caribe. C. gasar também ocorre na costa da Africa. Ainda que sua distribuição seja extensa e com disponibilidade abundante, o cultivo de ostras nativas no Brasil ainda é incipiente e a delimitação correta dos estoques mantém-se incerta. O sucesso do

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Tavares, Sara B. "Social associations, relatedness and population genetic structure of killer whales (Orcinus orca) in Iceland." Thesis, University of St Andrews, 2017. http://hdl.handle.net/10023/12061.

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In killer whales, fish- versus mammal-eating ecological differences are regarded as key ecological drivers of sociality, but the potential influence of specific target prey characteristics remains unclear. This thesis aimed to study the social patterns and dynamics of Icelandic killer whales feeding upon herring, a schooling prey that undergoes frequent changes in distribution and school size. I used a multi-disciplinary approach combining photo-identification and genetic data to understand the sociality, role of kinship and genetic differentiation within the population. Individuals sighted in

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Arruda, Maurício Papa de [UNESP]. "Avaliação da organização da variabilidade genética em populações de anfíbios de hábitats antropizados por meio marcadores microssatélites." Universidade Estadual Paulista (UNESP), 2010. http://hdl.handle.net/11449/102722.

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Made available in DSpace on 2014-06-11T19:32:14Z (GMT). No. of bitstreams: 0 Previous issue date: 2010-02-26Bitstream added on 2014-06-13T19:02:41Z : No. of bitstreams: 1 arruda_mp_dr_sjrp.pdf: 3154075 bytes, checksum: 425658b7ce3ff42cf3fde44c2f7d4d75 (MD5)<br>Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)<br>A destruição e a modificação do hábitat são aceitas, entre os biólogos conservacionistas, como as causas primárias da perda da biodiversidade, e a situação para os anfíbios não é exceção. Diversos processos antropogênicos contribuem para a deterioração das paisagen

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Kaus, Andrew. "Ecological assessment of salmonid populations in a country undergoing rapid environmental and socioeconomic transitions (Mongolia)." Doctoral thesis, Technische Universität Dresden, 2017. https://tud.qucosa.de/id/qucosa%3A30823.

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Mongolia is currently undergoing a rapid socioeconomic transition with extensive development driven by increased mineral resource extraction and large scale agriculture and pastoral expansion. There has also been unprecedented urbanisation and continued population growth that has placed added pressure on the ageing public infrastructure including power stations and waste water treatment plants. As a result, the country’s pristine landscapes, including its vast freshwater ecosystems, are now facing widespread degradation, contamination and species losses in the most impacted regions. The propos

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Kaus, Andrew. "Ecological assessment of salmonid populations in a country undergoing rapid environmental and socioeconomic transitions (Mongolia)." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2018. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-233488.

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Mongolia is currently undergoing a rapid socioeconomic transition with extensive development driven by increased mineral resource extraction and large scale agriculture and pastoral expansion. There has also been unprecedented urbanisation and continued population growth that has placed added pressure on the ageing public infrastructure including power stations and waste water treatment plants. As a result, the country’s pristine landscapes, including its vast freshwater ecosystems, are now facing widespread degradation, contamination and species losses in the most impacted regions. The propos

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Pontin, David R. "Factors influencing the occurrence of stinging jellyfish (Physalia spp.) at New Zealand beaches." Lincoln University, 2009. http://hdl.handle.net/10182/1580.

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Individuals of the cnidarian genus Physalia are a common sight at New Zealand beaches and are the primary cause of jellyfish stings to beachgoers each year. The identity of the species and the environmental factors that determine its presence are unknown. Lack of knowledge of many marine species is not unusual, as pelagic invertebrates often lack detailed taxonomic descriptions as well as information about their dispersal mechanisms such that meaningful patterns of distribution and dispersal are almost impossible to determine. Molecular systematics has proven to be a powerful tool for species

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Oduor, Bonaventure Omondi Aman. "Ecology and population genetic structure of strains of Teretrius nigrescens (Coleoptera: Histeridae), predator of Prostephanus truncatus (Coleoptera: Bostrichidae) / Bonaventure Omondi Aman Oduor." Thesis, North-West University, 2009. http://hdl.handle.net/10394/5006.

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The larger grain borer (LGB) Prostephanus truncatus (Horn) is the most important pest of farm stored maize and cassava in Africa. This alien invasive species was introduced into the continent from Mesoamerica in the late 1970s and by 2008 had spread to at least 18 countries. In contrast to indigenous primary storage pests, LGB exists as on-farm and as wild populations, hence, sustainable control must target both environments. Biological control is especially attractive for wild populations to reduce early season grain store infestation, while cultural and chemical methods are useful to protect

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Oprea, Monik. "Variabilidade e estrutura genética espacial em Glossophaga soricina com ocorrência no cerrado." Universidade Federal de Goiás, 2013. http://repositorio.bc.ufg.br/tede/handle/tede/3891.

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Submitted by Erika Demachki (erikademachki@gmail.com) on 2015-01-16T17:09:06Z No. of bitstreams: 2 license_rdf: 23148 bytes, checksum: 9da0b6dfac957114c6a7714714b86306 (MD5) Tese - Monik Oprea - 2013.pdf: 1967380 bytes, checksum: 406bdd6925672cd697798a30f89bc4d5 (MD5)<br>Approved for entry into archive by Erika Demachki (erikademachki@gmail.com) on 2015-01-16T17:32:35Z (GMT) No. of bitstreams: 2 license_rdf: 23148 bytes, checksum: 9da0b6dfac957114c6a7714714b86306 (MD5) Tese - Monik Oprea - 2013.pdf: 1967380 bytes, checksum: 406bdd6925672cd697798a30f89bc4d5 (MD5)<br>Made available in DSpac

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Rafati, Nima. "Exploring genetic diversity in natural and domestic populations through next generation sequencing." Doctoral thesis, Uppsala universitet, Institutionen för medicinsk biokemi och mikrobiologi, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-315032.

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Studying genetic diversity in natural and domestic populations is of major importance in evolutionary biology. The recent advent of next generation sequencing (NGS) technologies has dramatically changed the scope of these studies, enabling researchers to study genetic diversity in a whole-genome context. This thesis details examples of studies using NGS data to: (i) characterize evolutionary forces shaping the genome of the Atlantic herring, (ii) detect the genetic basis of speciation and domestication in the rabbit, and, (iii) identify mutations associated with skeletal atavism in Shetland po

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Arruda, Maurício Papa de. "Avaliação da organização da variabilidade genética em populações de anfíbios de hábitats antropizados por meio marcadores microssatélites /." São José do Rio Preto : [s.n.], 2010. http://hdl.handle.net/11449/102722.

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Orientador: Eliana Morielle Versute<br>Banca: Fabrício Rodrigues dos Santos<br>Banca: Luciana Bolsoni Lourenço<br>Banca: Cláudia Marcia Aparecida Carareto<br>Banca: Lilian Ricco Medeiros<br>Resumo: A destruição e a modificação do hábitat são aceitas, entre os biólogos conservacionistas, como as causas primárias da perda da biodiversidade, e a situação para os anfíbios não é exceção. Diversos processos antropogênicos contribuem para a deterioração das paisagens, podendo afetar negativamente as populações de anfíbios, por alterar fisicamente os ambientes aquáticos e terrestres, reduzindo a conec

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Lamichhaney, Sangeet. "The genetic basis for adaptation in natural populations." Doctoral thesis, Uppsala universitet, Institutionen för medicinsk biokemi och mikrobiologi, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-279969.

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Many previous studies in evolutionary genetics have been based on few model organisms that can be reared at ease in the laboratory. In contrast, genetic studies of non-model, natural populations are desirable as they provide a wider range of adaptive phenotypes throughout evolutionary timescales and allow a more realistic understanding of how natural selection drives adaptive evolution. This thesis represents an example of how modern genomic tools can be effectively used to study adaptation in natural populations. Atlantic herring is one of the world’s most numerous fish having multiple popula

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Ramos, Renato Rogner. "Padrões alares e efeitos da fragmentação de habitat na estrutura genetica de Heliconius erato phyllis (Fabricius, 1775) (Lepidoptera, Nymphalidae, Heliconiini)." [s.n.], 2010. http://repositorio.unicamp.br/jspui/handle/REPOSIP/316267.

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Orientadores: Vera Nisaka Solferini, Ronaldo Bastos Francini<br>Tese (doutorado) - Universidade Estadual de Campinas, Instituto de Biologia<br>Made available in DSpace on 2018-08-15T11:47:43Z (GMT). No. of bitstreams: 1 Ramos_RenatoRogner_D.pdf: 2883716 bytes, checksum: eac9d7277bf9ba106da8bdf2bc840994 (MD5) Previous issue date: 2010<br>Resumo: Espécies com distribuições continentais podem ocupar várias zonas climáticas e diferentes vegetações, e forças seletivas locais podem gerar diferenças entre populações. A borboleta Heliconius erato phyllis possui esse tipo de distribuição e o teste G

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Dannewitz, Johan. "Genetic and Ecological Consequences of Fish Releases : With Focus on Supportive Breeding of Brown Trout Salmo trutta and Translocation of European Eel Anguilla anguilla." Doctoral thesis, Uppsala : Acta Universitatis Upsaliensis : Univ.-bibl. [distributör], 2003. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-3764.

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