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Dissertations / Theses on the topic 'Phylogenetic structure'

Author: Grafiati

Published: 4 June 2021

Last updated: 26 July 2025

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1

Pearse, William D. "The phylogenetic structure of ecological communities under change." Thesis, Imperial College London, 2013. http://hdl.handle.net/10044/1/17942.

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Darwin first noticed that closely-related species tend to be more similar, and that this brings them into more severe competition with one another. In my thesis, I use information on the phylogenetic relatedness of species to help understand the processes that structure ecological assemblages. I start with a review of how phylogenetic structure is useful to ecologists (chapter one), and the methodological tools available to study it (chapter two). I then re-analyse the Barro Colorado Island dataset, finding shifts in phylogenetic structure across extremely fine spatial and phylogenetic scales

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2

Wang, Jeremy R. "Analysis and Visualization of Local Phylogenetic Structure within Species." Thesis, The University of North Carolina at Chapel Hill, 2013. http://pqdtopen.proquest.com/#viewpdf?dispub=3562960.

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<p> While it is interesting to examine the evolutionary history and phylogenetic relationship between species, for example, in a sort of "tree of life", there is also a great deal to be learned from examining population structure and relationships within species. A careful description of phylogenetic relationships within species provides insights into causes of phenotypic variation, including disease susceptibility. The better we are able to understand the patterns of genotypic variation within species, the better these populations may be used as models to identify causative variants and possi

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3

Towler, William Ian. "Phylogenetic structure of two Central Mexican Centruroides species complexes." Huntington, WV : [Marshall University Libraries], 2002. http://www.marshall.edu/etd/descript.asp?ref=85.

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4

Klepac-Ceraj, Vanja 1976. "Diversity and phylogenetic structure of two complex marine microbial communities." Thesis, Massachusetts Institute of Technology, 2004. http://hdl.handle.net/1721.1/28641.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2004.<br>Includes bibliographical references (p. 102-103).<br>(cont.) competitive mechanisms are too weak to purge diversity from within them.<br>Molecular surveys have revealed that microbial communities are extraordinarily diverse. Yet, two important questions remain unanswered: how many bacterial types co-exist, and do such types form phylogenetically discrete units of potential ecological relevance? This thesis explores these questions by investigating bacterial diversity in two complex ma

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5

Malosso, Elaine. "Effects of plant amendment on microbial community structure and fungal biomass in Antarctic soils." Thesis, University of Newcastle Upon Tyne, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.289240.

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6

Gillespie, Joseph James. "Structure-based methods for the phylogenetic analysis of ribosomal RNA molecules." Texas A&M University, 2005. http://hdl.handle.net/1969.1/2580.

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Ribosomal RNA (rRNA) molecules form highly conserved secondary and tertiary structures via rRNA-rRNA and rRNA-protein interactions that collectively comprise the macromolecule that is the ribosome. Because of their cellular universality, rRNA molecules are commonly used for phylogeny estimations spanning all divergences of life. In this dissertation, I elucidate the structure of several rRNAs by analyzing multiply aligned sequences for basepair covariation and conserved higher order structural motifs. Specifically, I predict novel structures for expansion segments D2 and D3 of the nuclear larg

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7

Hoffman, Michele Therese. "Bacterial Endosymbionts of Endophytic Fungi: Diversity, Phylogenetic Structure, and Biotic Interactions." Diss., The University of Arizona, 2010. http://hdl.handle.net/10150/196079.

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This dissertation comprises a series of studies designed to explore the associations between plants and the endophytic fungi they harbor in their above-ground tissues. By viewing endophyte diversity in ecologically and economically important hosts through the lenses of phylogenetic biology, microbiology, and biotechnology, this body of work links plant ecology with newly discovered symbiotic units comprised of endophytic fungi and the bacteria that inhabit them.This work begins with a large-scale survey of endophytic fungi from native and non-native Cupressaceae in Arizona and North Carolina.

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8

Breinholt, Jesse W. "Testing Crayfish Evolutionary Hypotheses with Phylogenetic Methods." BYU ScholarsArchive, 2012. https://scholarsarchive.byu.edu/etd/3563.

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This dissertation focuses on increasing the understanding of the evolution processes that have contributed to the diversification of freshwater crayfish. Chapter one estimates the divergence time of the three crayfish families and tests the hypothesis that diversification is tied to the break-up of Pangaea, Gondwanna, and Laurasia. I find that the families of crayfish diverged prior to or in association with the break-up of the three super continents. Chapter two addresses the evolutionary history of the genus Cambarus, using molecular data to test hypotheses of relationships based on chela an

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9

Kelly, Sandor Lawrence. "Phylogenetic Community Structure of Aquatic Beetle Assemblages in a Multi-Wetland Experiment." Master's thesis, University of Central Florida, 2012. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/5374.

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Phylogenetic Community Structure (PCS) metrics are becoming more common in community ecology. PCS metrics estimate the phylogenetic relatedness among members of an ecological community or assemblage. If ecological traits are conserved, then phylogenetic clustering (i.e., taxa are more closely related than expected by chance) indicates habitat filtering as the key process in community assembly. On the other hand, a pattern of phylogenetic overdispersion (i.e., taxa are more distantly related than expected by chance) suggests competition is dominant. Most studies to date have used PCS of unman

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10

Dnyansagar, Rohit. "Investigation of phylogenetic relationships using microRNA sequences and secondary structures." Thesis, Högskolan i Skövde, Institutionen för vård och natur, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:his:diva-4478.

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MicroRNAs are important biomolecules for regulating biological processes. Moreover, the secondary structure of microRNA is important for its activity and has been used previously as a mean for finding unknown microRNAs. A phylogenetic study of the microRNA secondary structure reveals more information than its primary sequence, because the primary sequence can undergo mutations that give rise to different phylogenetic relationships, whereas the secondary structure is more robust against mutations and therefore sometimes more informative. Here we constructed a phylogenetic tree entirely based o

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11

Nall, Gregory Allen. "An alternative model of chimpanzee social structure, with implications for phylogenetic models of stem-hominid social structure." Virtual Press, 1992. http://liblink.bsu.edu/uhtbin/catkey/845924.

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The following research paper was concerned with five basic objectives:(1) outlining the major theoretical and methodological approaches used in the reconstruction of early hominid social behavior/social structure as a context in which to view Richard Wrangham's and Michael Ghiglieri's phylogenetic models of stem-hominid social structure.(2) examining Wrangham's and Ghiglieri's models of stem-hominid and chimpanzee social structure.(3) indicating how theoretical and methodological aspects of structure essentially represent an extension of the theoretical and methodological approaches the same r

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12

Turbeville, Tracy D. "PLP-Dependent α-Oxoamine Synthases: Phylogenetic Analysis, Structural Plasticity, and Structure-Function Studies on 5-Aminolevulinate Synthase". Scholar Commons, 2009. https://scholarcommons.usf.edu/etd/57.

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5-Aminolevulinate synthase (ALAS) and 8-amino-7-oxononanoate synthase (AONS) are two of four homodimeric members of the alpha-oxoamine synthase family of pyridoxal 5'-phosphate (PLP)-dependent enzymes. The evolutionary relationships among α-oxoamine synthases representing a broad taxonomic and phylogenetic spectrum have been examined to help identify residues that may regulate substrate specificity. The structural plasticity of ALAS has been documented in studies of functional circularly permuted ALAS variants and the single polypeptide chain ALAS dimer (ALAS/ALAS) exhibiting a greater turnove

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13

Schubert, Michael. "Wnt family genes in the cephalochordate amphioxus : structure, phylogenetic analysis, and developmental expression /." Diss., Connect to a 24 p. preview or request complete full text in PDF format. Access restricted to UC campuses, 2001. http://wwwlib.umi.com/cr/ucsd/fullcit?p3035434.

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14

Chen, Xing. "EVOLUTION OF GROUP I INTRONS IN THE NUCLEAR RIBOSOMAL RNA GENES OF DOTHIDEOMYCETES." Bowling Green State University / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1288376350.

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15

Rosa, Alexandra. "Phylogenetic structure of Guinea-Bissau ethnic groups for mitochondrial DNA and Y chromosome genetic systems." Doctoral thesis, Universidade da Madeira, 2007. http://hdl.handle.net/10400.13/38.

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The maternal and paternal genetic profile of Guineans is markedly sub-Saharan West African, with the majority of lineages belonging to L0-L3 mtDNA sub-clusters and E3a-M2 and E1-M33 Y chromosome haplogroups. Despite the sociocultural differences among Guinea-Bissau ethnic groups,marked by the supposedly strict admixture barriers, their genetic pool remains largely common. Their extant variation coalesces at distinct timeframes, from the initial occupation of the area to later inputs of people. Signs of recent expansion in mtDNA haplogroups L2a-L2c and NRY E3a-M2 suggest population growth in t

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16

Ricci, Andrea <1972&gt. "Mitochondrial Genomics: structure, inheritance and phylogenetic utility of the Mitochondrial genome in Bivalvia and Insecta." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2009. http://amsdottorato.unibo.it/1875/1/Ricci_Andrea_tesi.pdf.

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This PhD Thesis is the result of my research activity in the last three years. My main research interest was centered on the evolution of mitochondrial genome (mtDNA), and on its usefulness as a phylogeographic and phylogenetic marker at different taxonomic levels in different taxa of Metazoa. From a methodological standpoint, my main effort was dedicated to the sequencing of complete mitochondrial genomes, and the approach to whole-genome sequencing was based on the application of Long-PCR and shotgun sequences. Moreover, this research project is a part of a bigger sequencing project of

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Ricci, Andrea <1972&gt. "Mitochondrial Genomics: structure, inheritance and phylogenetic utility of the Mitochondrial genome in Bivalvia and Insecta." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2009. http://amsdottorato.unibo.it/1875/.

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This PhD Thesis is the result of my research activity in the last three years. My main research interest was centered on the evolution of mitochondrial genome (mtDNA), and on its usefulness as a phylogeographic and phylogenetic marker at different taxonomic levels in different taxa of Metazoa. From a methodological standpoint, my main effort was dedicated to the sequencing of complete mitochondrial genomes, and the approach to whole-genome sequencing was based on the application of Long-PCR and shotgun sequences. Moreover, this research project is a part of a bigger sequencing project of

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18

Saraiva, Daniel Dutra. "Determinantes ecológicos da diversidade beta de árvores em florestas atlânticas no sul do Brasil." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2017. http://hdl.handle.net/10183/187211.

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Abordagens integrativas considerando diferentes dimensões da diversidade (p.ex., taxonômica, funcional, ou filogenética) cada vez mais estão sendo utilizadas para (1) avançar o nosso conhecimento sobre os mecanismos que criam e mantém a biodiversidade, e (2) elucidar a distribuição da biodiversidade tanto em áreas geográficas de interesse como dentro de áreas protegidas. De fato, entender como a biodiversidade se distribui no espaço e como ela é mantida ao longo do tempo é fundamental para embasar o planejamento de áreas protegidas e corredores ecológicos, assim como auxiliar no manejo de espé

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19

Kawase, Daiju. "Phylogenetic differentiation and population genetic structure of plants distributed in specific soils derived from ultramafic rocks." 京都大学 (Kyoto University), 2008. http://hdl.handle.net/2433/136935.

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Vieira, Pedro Rates. "Efeitos funcionais e filogenéticos nas relações entre forófitos e epífetos vasculares." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2012. http://hdl.handle.net/10183/144069.

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Os padrões de associação entre epífitos e forófitos não podem ser considerados espécie-específicos, mas as árvores que os epífitos colonizam também não são um conjunto aleatório das espécies forofíticas de um determinado local. Ao invés disso, parece haver uma preferência de certos epífitos por diferentes forófitos. No entanto, se conhece pouco sobre os fatores que determinam essa preferência. Nosso objetivo nesse trabalho é avaliar como os atributos funcionais e a filogenia dos epífitos vasculares influenciam na associação dos epífitos com os forófitos em uma Floresta Ombrófila Mista no sul d

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21

Nyoike, Rossa Ng'endo [Verfasser], and Roland [Akademischer Betreuer] Brandl. "Phylogenetic community structure of ants in secondary tropical forests in Brazil / Rossa Ng'endo Nyoike. Betreuer: Roland Brandl." Marburg : Philipps-Universität Marburg, 2011. http://d-nb.info/1014851769/34.

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22

Nunez, Andres Enrique. "MICROBIAL COMMUNITY STRUCTURE DYNAMICS IN OHIO RIVER SEDIMENTS DURING REDUCTIVE DECHLORINATION OF PCBS." UKnowledge, 2008. http://uknowledge.uky.edu/gradschool_diss/679.

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The entire stretch of the Ohio River is under fish consumption advisories due to contamination with polychlorinated biphenyls (PCBs). In this study, natural attenuation and biostimulation of PCBs and microbial communities responsible for PCB transformations were investigated in Ohio River sediments. Natural attenuation of PCBs was negligible in sediments, which was likely attributed to low temperature conditions during most of the year, as well as low amounts of available nitrogen, phosphorus, and organic carbon. Moreover, surface sediments were relatively oxidized, as indicated by the prevale

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23

Lamanna, Christine Anne. "The Structure and Function of Subalpine Ecosystems in the Face of Climate Change." Diss., The University of Arizona, 2012. http://hdl.handle.net/10150/228495.

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Subalpine ecosystems are experiencing rapid changes in snow pack, temperature, and precipitation regime as a result of anthropogenic climate forcing. These changes in climate can have a profound effect on subalpine ecosystem structure and functioning, which may ultimately feed back to climate change. In this study, I examined the response of the subalpine meadow plant communities at the Rocky Mountain Biological Laboratory to natural and simulated climate change. First, I looked at whether changes in growing season precipitation or temperature regime would have the larger effect on subalpine e

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24

Fabillo, Melodina. "Leaf and inflorescence structure and phylogenetics of Tripogon and affiliated genera (Poaceae: Chloridoideae)." Thesis, Queensland University of Technology, 2015. https://eprints.qut.edu.au/83726/1/Melodina_Fabillo_Thesis.pdf.

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This thesis provides new knowledge on an understudied group of grasses, some of which are resurrection grasses (i.e. able to withstand extreme drought). The sole Australian species (Tripogon loliiformis) is morphologically diverse and could be more than one species. This study sought to determine how many species of Tripogon occur in Australia, their relationships to other species in the genus and to two other genera of resurrection grasses (Eragrostiella and Oropetium). Results of the research indicate there is not enough evidence, from DNA sequence data, to warrant splitting up T. loliiform

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El, Baidouri Fouad. "Le genre Leishmania : structure génétique et mécanismes d'évolution." Thesis, Montpellier 1, 2012. http://www.theses.fr/2012MON1T028.

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Les protozoaires parasites du genre Leishmania infectent de très nombreuses espèces de mammifères à travers le Monde. Transmis par des insectes vecteurs, ces pathogènes sont endémiques dans une centaine de pays et chez l'Homme l'incidence de la maladie est estimée à environ 2 millions de nouveaux cas chaque année. Les questions qui se posent aujourd'hui sur les modalités de reproduction et d'échanges génétiques chez ces protozoaires sont multiples. Elles ont des prolongements sur l'évolution, l'adaptation à de nouveaux cycles, la virulence, l'identification spécifique, la taxonomie ou la prise

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Ledezma, Jesús Nazareno Pinto. "A origem e a estruturação das assembleias de aves da infraordem Furnariides ao longo do tempo e do espaço: o papel dos processos históricos." Universidade Federal de Goiás, 2017. http://repositorio.bc.ufg.br/tede/handle/tede/8740.

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Submitted by Marlene Santos (marlene.bc.ufg@gmail.com) on 2018-07-26T17:56:37Z No. of bitstreams: 2 Tese - Jesús Nazareno Pinto Ledezma - 2017.pdf: 8871426 bytes, checksum: 451cfc37da75487787cfc68ca57f9d82 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5)<br>Approved for entry into archive by Luciana Ferreira (lucgeral@gmail.com) on 2018-07-27T15:03:35Z (GMT) No. of bitstreams: 2 Tese - Jesús Nazareno Pinto Ledezma - 2017.pdf: 8871426 bytes, checksum: 451cfc37da75487787cfc68ca57f9d82 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5)<br>Made

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Radtke, Gregor [Verfasser]. "The internal structure of growth interruptions and the dorsal shell wall of Mesozoic ammonoids and its phylogenetic and taxonomic implications / Gregor Radtke." Berlin : Freie Universität Berlin, 2017. http://d-nb.info/1129174565/34.

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Peralta, Guadalupe. "Food webs from natural to production forests: composition, phylogeny and functioning." Thesis, University of Canterbury. School of Biological Sciences, 2013. http://hdl.handle.net/10092/8556.

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Habitat loss and fragmentation have been identified as the main drivers of biodiversity loss. These drivers increase the proportion of habitat edges and change the configuration of landscapes. Habitat edges are known to affect ecological patterns and processes, however, is still unknown how these boundaries affect the assemblage of interactions among species within a community, and particularly its structure. Food webs depict not only the composition of the community, but also the feeding links, which represent a measure of energy flow. Therefore, they can inform about the relationships among

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Perland, Emelie. "Atypical Solute Carriers : Identification, evolutionary conservation, structure and histology of novel membrane-bound transporters." Doctoral thesis, Uppsala universitet, Institutionen för neurovetenskap, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-324206.

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Solute carriers (SLCs) constitute the largest family of membrane-bound transporter proteins in humans, and they convey transport of nutrients, ions, drugs and waste over cellular membranes via facilitative diffusion, co-transport or exchange. Several SLCs are associated with diseases and their location in membranes and specific substrate transport makes them excellent as drug targets. However, as 30 % of the 430 identified SLCs are still orphans, there are yet numerous opportunities to explain diseases and discover potential drug targets. Among the novel proteins are 29 atypical SLCs of major

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Debastiani, Vanderlei Julio. "Estrutura filogenética de comunidades de plantas lenhosas em ecótonos vegetacionais." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2012. http://hdl.handle.net/10183/69737.

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A busca de padrões consistentes na natureza tem sido a principal meta dos ecólogos. Essa dissertação teve como objetivo usar abordagens filogenéticas na tentativa de compreender melhor o processo ecológico da expansão florestal sobre áreas abertas. O uso da informação filogenética em análises ecológicas considera as espécies não independentes umas das outras, pois estas compartilham grande parte da história evolutiva. Essa hierarquia de organização das espécies é muito importante para determinar as regras que governam os processos de montagem das comunidades locais. Nesta dissertação foram ava

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Leite, Filho Edinaldo. "Estrutura de uma taxocenose de anfíbios anuros em fragmento urbano de floresta atlântica no extremo leste da região neotropical." Universidade Federal da Paraíba, 2013. http://tede.biblioteca.ufpb.br:8080/handle/tede/4126.

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Made available in DSpace on 2015-04-17T14:55:26Z (GMT). No. of bitstreams: 1 arquivototal.pdf: 815263 bytes, checksum: b2a7881211ea09539084f0360e28deeb (MD5) Previous issue date: 2013-04-30<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES<br>Based on diet, microhabitat use and morphometry data, we investigated the importance of ecological and historical (phylogenetic) factors an anuran assemblage (16 species) in a urban fragment of Atlantic Rainforest in northeast Brazil. The niche breadth for microhabitat use was low for all species, while diet niche breadth was high

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LAIDANI, MERIEM. "Study of the ribosomal DNA intergenic spacer (IGS) region as a molecular tool for identification of vascular fungi associated with Olive Quick Decline Syndrome in Southern Italy: Phaeoacremonium italicum as a study model." Doctoral thesis, Università degli Studi di Foggia, 2019. http://hdl.handle.net/11369/382361.

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This research concerns the first study of the ribosomal DNA intergenic spacer (IGS) region as a molecular target for detection and phylogenetic analyses of Phaeoacremonium spp. found associated with olive quick decline syndrome in southern Italy. The study follows a survey carried out during a period of three years (2015-2018), in different olive orchards of Salento (Apulia). Disease symptoms of wilt and dieback, browning and streaking under the bark and wood discoloration were observed. Three Phaeoacremonium species were isolated more frequently than other fungi. These Phaeoacremonium spp. we

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Krug, Peter Michael [Verfasser]. "Evaluating the phylogenetic structure and microstructural evolution of organellar markers from both compartments in the reconstruction of a carboniferous radiation (mosses) / Peter Michael Krug." Bonn : Universitäts- und Landesbibliothek Bonn, 2017. http://d-nb.info/114052593X/34.

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Hopitzan, Alexander A. "Expression of the Ank3 gene in rat skeletal muscle : gene structure, splice pattern, phylogenetic analysis, molecular identification and subcellular targeting of encoded ankyrins-G." Paris 6, 2005. http://www.theses.fr/2005PA066311.

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Souza, Karine. "Gradiente topográfico como fonte de heterogeneidade do componente arbóreo em uma floresta na região do Alto Uruguai." Universidade do Estado de Santa Catarina, 2015. http://tede.udesc.br/handle/handle/1956.

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Made available in DSpace on 2016-12-12T20:12:32Z (GMT). No. of bitstreams: 1 PGEF15MA042.pdf: 1375553 bytes, checksum: f93a1c6bfaca22be5ac8fae40f160f3c (MD5) Previous issue date: 2015-06-16<br>The present dissertation aimed to understand the functional, phylogenetic and the floristic-structural organization of the tree component, along a topographic gradient in a forest in Upper Uruguay River region. Information of this nature is critical for the definition of conservation plans, since it allows inferences about the ecological strategies of species to occupy different environmental condition

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Parveen, Bushra. "Structure et dynamique de la communauté bactérienne libre et attachée dans les écosystèmes lacustres." Thesis, Clermont-Ferrand 2, 2012. http://www.theses.fr/2012CLF22221.

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C'est essentiellement sur les bactéries libres que portent les études récentes en écologie microbienne d'eau douce, et seulement quelques études ont concerné les communautés bactériennes attachées. Dans cette étude basée sur l'analyse des séquences du gène 16SARNr, la diversité des communautés bactériennes attachées ainsi que de la fraction libre a été étudiée sur deux systèmes d'eau douce ; un lac mésotrophe (le lac du Bourget) et un lac hypereutrophe (le lac Villerest). La diversité des Actinobacteria, Betaproteobacteria et Verrucomicrobia libres et attachées a été étudié en relation avec le

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Protázio, Arielson dos Santos. "Ecologia de taxocenose de anfíbios anuros em poças temporárias na caatinga." Universidade Federal da Paraíba, 2012. http://tede.biblioteca.ufpb.br:8080/handle/tede/4105.

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Made available in DSpace on 2015-04-17T14:55:19Z (GMT). No. of bitstreams: 1 arquivototal.PDF: 1079008 bytes, checksum: 6627885b56d1a7d7174f7cbfaceacfb7 (MD5) Previous issue date: 2012-02-13<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES<br>In theroy, the influence of phylogeny in community structure implies that phylogenetically close species may show similar characteristics determined by their evolutionary history. In a fine scale, this is useful to identify processes of microevolution. We used phylogenetic and ecological data to investigate the determinant fact

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Woodcock, M. Ryan. "Network Analysis and Comparative Phylogenomics of MicroRNAs and their Respective Messenger RNA Targets Using Twelve Drosophila species." VCU Scholars Compass, 2010. http://scholarscompass.vcu.edu/etd/155.

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MicroRNAs represent a special class of small (~21–25 nucleotides) non-coding RNA molecules which exert powerful post-transcriptional control over gene expression in eukaryotes. Indeed microRNAs likely represent the most abundant class of regulators in animal gene regulatory networks. This study describes the recovery and network analyses of a suite of homologous microRNA targets recovered through two different prediction methods for whole gene regions across twelve Drosophila species. Phylogenetic criteria under an accepted tree topology were used as a reference frame to 1) make inference into

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Murakaeva, Asiya. "Structure, evolution and expression of the duplicated growth hormone genes of common carp (Cyprinus carpio)." Doctoral thesis, Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät I, 2009. http://dx.doi.org/10.18452/15982.

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Der Karpfen, Cyprinus carpio, ist eine tetraploide Fischart aus der Familie Cyprinidae, die vor 20-50 Mio Jahren entstanden ist. Das Ziel der vorliegenden Arbeit war der Versuch, die funktionelle Rolle der duplizierten GH Gene des Karpfens durch das Studium ihrer Struktur, Evolution und Expression zu verstehen. Die Introns des zweiten GH Gens des Karpfens wurden erstmalig sequenziert und Sequenzvergleiche der kodierenden und nicht-kodierenden Bereiche von Allelen beider GH Gene wurden vorgenommen. Eine phylogenetische Analyse wurde durchgefuhrt, um die Beziehungen der GH Gene des Karpfens zu d

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Idid, Mohammed Rizman. "Phylogenetics and population structure of Lake Malawi cichlids." Thesis, University of Hull, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.418795.

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Pires, Thiago Augusto 1984. "Phylogenetic, taxonomical and functional diversity and the structure of anurans communities in coastal plains of São Paulo state, southeastern Brazil = Diversidade filogenética, taxonômica e funcional e a estrutura de comunidades de anuros nas planícies costeiras do estado de São Paulo, sudeste do Brasil." [s.n.], 2014. http://repositorio.unicamp.br/jspui/handle/REPOSIP/316217.

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Orientador: Ricardo Jannini Sawaya<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Biologia<br>Made available in DSpace on 2018-08-25T23:18:41Z (GMT). No. of bitstreams: 1 Pires_ThiagoAugusto_M.pdf: 2411650 bytes, checksum: 8eb94586d77742cae5062b5aec5233a8 (MD5) Previous issue date: 2014<br>Resumo: Em termos gerais, comunidades biológicas podem ser estruturadas por elementos que ocorrem em escalas espaciais diversas, que incluem fatores bióticos (e.g., competição e predação); fatores abióticos (e.g., heterogeneidade ambiental), históricos (e.g., eventos de extinçã

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Brum, Fernanda Thiesen. "Integrando aspectos filogenéticos e funcionais na biogeografia da conservação de vertebrados." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2015. http://hdl.handle.net/10183/117879.

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Estimativas recentes mostram que as taxas atuais de extinção são muito maiores do que o indicado pelo registro fóssil, sendo as principais ameaças resultado da atividade humana. Como a crise da biodiversidade age em todas as escalas e não apresenta fronteiras políticas, a aplicação do arcabouço teórico da biogeografia da conservação e do planejamento sistemático para conservação se torna muito útil para a identificação de áreas com alto valor de conservação que sejam significativas em um contexto global, continental ou regional. Além da dimensão taxonômica, as dimensões funcional e filogenétic

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Gruhl, Alexander [Verfasser]. "Phylogenetic significance of mesodermal and neural structures in Bryozoa / Alexander Gruhl." Berlin : Freie Universität Berlin, 2008. http://d-nb.info/1023095785/34.

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Frey, Gabriel Ponzoni. "Estrutura filogenética e demografia de árvores em uma floresta de restinga." Universidade de São Paulo, 2013. http://www.teses.usp.br/teses/disponiveis/41/41134/tde-15102013-155722/.

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Explicar os padrões de diversidade de espécies e entender os processos que geram e mantêm essa diversidade na natureza é um dos grandes objetivos da Ecologia. A teoria clássica de competição prevê que duas espécies só podem coexistir quando há divergência no uso de recursos. Portanto, há um limite de similaridade imposto pela competição entre as espécies, que leva à co-ocorrência de espécies com estratégias ecológicas mais diferentes entre si. Por outro lado, o ambiente físico pode impor restrições às possíveis estratégias ecológicas das espécies. Ambientes com limitações de recursos ou condiç

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Davis, Daniel J. "The phylogenetics of Tachinidae (Insecta: Diptera) with an emphasis on subfamily structure." Wright State University / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=wright1357414082.

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MASTRANGELO, Salvatore. "Application of molecular markers to investigate genetic diversity in Sicilian livestock." Doctoral thesis, Università degli Studi di Palermo, 2014. http://hdl.handle.net/10447/90851.

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La diversità genetica delle specie e razze di interesse zootecnico, rappresenta un’importante risorsa in tutti i sistemi di allevamento . Per lo studio della diversità genetica, nel corso dei decenni sono stati sviluppati diversi metodi che si basano su informazioni del pedigree o su dati molecolari (microsatelliti e SNPs, Single Nucleotide Polymorphisms). Con l’aumento della disponibilità di marcatori molecolari per la maggior parte delle specie di interesse zootecnico, e con lo sviluppo di sofisticate tecniche analitiche, sta crescendo la capacità di caratterizzare la variabilità genetica de

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Patterson-Ross, Zoe. "Inferring viral evolutionary history and dynamics using time-structured molecular sequence data." Thesis, The University of Sydney, 2019. http://hdl.handle.net/2123/21189.

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Genome sequence data provide rich overlays of information on viral evolutionary history with wide temporal scope. When structured with meta-data such as time of sampling, sequence data can even be used to co-estimate key evolutionary and epidemiological dynamics for diverse sets of viruses. Over evolutionary time, genetic variation accumulates in populations through the effect of evolutionary processes, such as mutation, recombination, and reassortment, with variations spread by both stochastic and deterministic mechanisms. These evolutionary processes, and thus the history of a population, ca

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Pan, Xueliang. "Using Structural Information in Modeling and Multiple Alignments for Phylogenetics." The Ohio State University, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=osu1206068803.

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Dauby, Gilles. "Structure spatiale de la diversité intra- et interspécifique en Afrique centrale: le cas des forêts gabonaises." Doctoral thesis, Universite Libre de Bruxelles, 2012. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/209761.

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L’origine de la structuration spatiale de la diversité inter spécifique (SSDS) des forêts d’Afrique centrale est l'objet de vigoureux débats quant à l’importance relative des facteurs historiques, stochastiques et déterministes. De plus, la SSDS est le plus souvent mal caractérisée, en particulier la variation spatiale de la composition des communautés (diversité beta).<p>L’hypothèse la plus souvent avancée pour expliquer l’origine des centres de diversité et d’endémisme est historique :ces centres constitueraient d’anciens refuges forestiers formés pendant les périodes sèches du Quaternaire.

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Dinda, Stephen B. "Predicting RNA Mutation Using 3D Structure." Bowling Green State University / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1321280932.

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