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Dissertations / Theses on the topic 'Conservatisme de niche'

Author: Grafiati
Published: 12 May 2022
Last updated: 18 July 2025

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1

Rejaud, Alexandre. "Origine et diversité des Amphibiens d'Amazonie." Thesis, Toulouse 3, 2021. http://www.theses.fr/2021TOU30161.

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Avec une surface de plus de six millions de kilomètres carrés, l'Amazonie abrite la plus grande forêt tropicale humide au monde, ainsi qu'une grande partie de la diversité terrestre. Cependant, les origines spatiales et temporelles de cette diversité demeurent mal comprises et nécessitent d'être plus étudiées pour identifier les causes de cette impressionnante diversification. Les amphibiens sont un groupe taxonomique particulièrement adapté à l'étude de la biogéographie historique en Amazonie car ils ont diversifié de manière importante dans la région et présentent d'importante variations d'u
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2

Silva, Helen Rosa da. "Padrões espaciais e temporais na amplitude de nicho climático de vertebrados terrestres." Universidade Federal de Goiás, 2015. http://repositorio.bc.ufg.br/tede/handle/tede/5527.

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Submitted by Marlene Santos (marlene.bc.ufg@gmail.com) on 2016-05-04T19:47:04Z No. of bitstreams: 2 Dissertação - Helen Rosa da Silva - 2015.pdf: 1580503 bytes, checksum: b52d04d79b983417cb07f98a43ae918d (MD5) license_rdf: 19874 bytes, checksum: 38cb62ef53e6f513db2fb7e337df6485 (MD5)<br>Approved for entry into archive by Luciana Ferreira (lucgeral@gmail.com) on 2016-05-05T13:09:29Z (GMT) No. of bitstreams: 2 Dissertação - Helen Rosa da Silva - 2015.pdf: 1580503 bytes, checksum: b52d04d79b983417cb07f98a43ae918d (MD5) license_rdf: 19874 bytes, checksum: 38cb62ef53e6f513db2fb7e337df6485 (MD5)<br>
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3

Gurgel, Priscila Cabral Silveira. "Reproductive modes are associated to climatic niche evolution in treefrogs (anura: hylidae)." Universidade Federal de Goiás, 2016. http://repositorio.bc.ufg.br/tede/handle/tede/6263.

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Submitted by Marlene Santos (marlene.bc.ufg@gmail.com) on 2016-09-23T18:57:40Z No. of bitstreams: 2 Dissertacao - Priscila Cabral Silveira Gurgel - 2016.pdf: 2031167 bytes, checksum: 22df3ff29210a62b369501594be33bb5 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5)<br>Approved for entry into archive by Luciana Ferreira (lucgeral@gmail.com) on 2016-09-26T11:43:47Z (GMT) No. of bitstreams: 2 Dissertacao - Priscila Cabral Silveira Gurgel - 2016.pdf: 2031167 bytes, checksum: 22df3ff29210a62b369501594be33bb5 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ec
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4

Fran?a, Karol Lyncoln B. de O. de. "Padr?es de coexist?ncia e utiliza??o do h?bitat por duas esp?cies de Herpsilochmus (Aves: Thamnophilidae)." Universidade Federal do Rio Grande do Norte, 2012. http://repositorio.ufrn.br:8080/jspui/handle/123456789/14041.

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Made available in DSpace on 2014-12-17T14:33:09Z (GMT). No. of bitstreams: 1 KarolLBOF_DISSERT_PARCIAL.pdf: 340660 bytes, checksum: f2a188d52831a6a40d06910a31049e94 (MD5) Previous issue date: 2012-07-05<br>How ecologically similar species are able to coexist has always generated great interest in the scientific community. Classical niche theory predicts that species coexistence is only possible when they segregate in at least one dimension of the ecological niche, thus leading to ecological differentiation among species. However, recent work has shown that species that are more similar
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5

Russell, Vanessa. "Identifying Environmental Factors Driving Differences in Climatic Niche Overlap in Peromyscus Mice." Miami University / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=miami1565722438217428.

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6

Bolte, Constance E. "NICHE CONSERVATISM OR DIVERGENCE: INSIGHTS INTO THE EVOLUTIONARY HISTORIES OF Pinus taeda, Pinus rigida, AND Pinus pungens." VCU Scholars Compass, 2017. http://scholarscompass.vcu.edu/etd/4842.

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Environmentally related selective pressures and community interactions are well-documented drivers for niche differentiation, as natural selection acts on adaptive traits best fit for survival. Here, we investigated niche evolution between and within Pinus taeda, Pinus rigida, and Pinus pungens and sought to identify which climate variables contributed to species divergence. We also sought to describe niche differentiation across genetic groupings previously identified for P. taeda and P. rigida. Ecological niche models were produced using Maximum Entropy followed by statistical testing based
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7

Silva, Marcelo da. "Taxonomia e biogeografia da esp?cie polit?pica Herpsilochmus rufimarginatus (TEMMINCK, 1822) (Aves: THAMNOPHILIDAE)." Universidade Federal do Rio Grande do Norte, 2013. http://repositorio.ufrn.br:8080/jspui/handle/123456789/18132.

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Made available in DSpace on 2014-12-17T15:49:14Z (GMT). No. of bitstreams: 1 MarceloS_DISSERT.pdf: 3344512 bytes, checksum: a6ed717c2f82cdbe0c9dda1fc27ed564 (MD5) Previous issue date: 2013-06-28<br>Universidade Federal do Rio Grande do Norte<br>The genus Herpsilochmus is composed mainly of cryptic species, among them is Herpsilochmus rufimarginatus, which is currently represented by four subspecies: H. r. rufimarginatus, H. r. frater, H. r. scapularis and H. r. exiguus. Differences in plumage and vocalization suggest that there are more than one species involved in this complex. Thus th
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8

LIMA, JUNIOR Dilermando Pereira. "Transformando tropeços em passos de dança: o uso de espécies exóticas para estudos biogeográficos." Universidade Federal de Goiás, 2008. http://repositorio.bc.ufg.br/tede/handle/tde/2548.

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Made available in DSpace on 2014-07-29T16:21:15Z (GMT). No. of bitstreams: 1 Dissertacao Dilermando P L Jr.pdf: 360879 bytes, checksum: 1c2f22ea2b7828ee7c6779ffd933fed4 (MD5) Previous issue date: 2008-02-27<br>The establishment of exotic species is known for the negative impacts it causes. However, it can be used as models to study the ecological and evolutionary causes of biogeography patterns and access whether the niche conservatism is the determinant of the species limits distribution. The main purpose of this study is to evaluate the difference between pools of exotic fish species in bi
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9

Viljoen, Jan-Adriaan. "Biogeography of Isolepis subgenus Fluitantes (C.B. Clarke), Muasya (Cyperaceae): niche conservatism, long distance dispersal and hybridization." Bachelor's thesis, University of Cape Town, 2010. http://hdl.handle.net/11427/25958.

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Numerous lineages of the Western Cape of South Africa show affinities with the flora of tropical Africa and with Australasia. Recent work suggests that most migrations between the Western Cape and tropical Africa occur in a northward direction, and that connections between the flora of regions in the Southern Hemisphere are maintained by wind-assisted long-distance dispersal. The Fluitantes clade of lsolepis (Cyperaceae: Cypereae) is distributed throughout these areas and provides a useful study group to assess the general validity of published biogeographical trends. Furthermore, the cooccurr
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10

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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11

García-Villacorta, Roosevelt. "Integrating molecular biogeography and community ecology to understand the evolution of habitat specialization in Amazonian forests." Thesis, University of Edinburgh, 2015. http://hdl.handle.net/1842/11795.

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I investigated the origin of western Amazonian white-sand vegetation and the evolution of plant habitat specialization to different edaphic conditions in Neotropical lowland forests. In order to address these goals I used complementary ecological as well as molecular phylogenetic approaches. Amazonian white-sand forests harbour a flora specialized to nutrient-poor sandy soils, which is distributed as habitat-islands across the Amazon and Guiana Shield regions. This flora has been suggested to have many local and regional endemics, therefore making an important contribution to overall Neotropic
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12

Peixoto, Franciele Parreira. "Determinantes ecológicos, evolutivos e histórico-biogeográficos dos padrões de diversidade de mamíferos terrestres em diferentes escalas." Universidade Federal de Goiás, 2017. http://repositorio.bc.ufg.br/tede/handle/tede/7230.

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Submitted by Luciana Ferreira (lucgeral@gmail.com) on 2017-05-02T14:03:32Z No. of bitstreams: 2 Tese - Franciele Parreira Peixoto - 2017.pdf: 8334533 bytes, checksum: 7734e779e227ff5ab84bc8cfc9f9212b (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5)<br>Approved for entry into archive by Luciana Ferreira (lucgeral@gmail.com) on 2017-05-02T14:03:58Z (GMT) No. of bitstreams: 2 Tese - Franciele Parreira Peixoto - 2017.pdf: 8334533 bytes, checksum: 7734e779e227ff5ab84bc8cfc9f9212b (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5)<br>Made availab
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13

Radomski, Thomas P. "Biogeography and Climatic Niche Evolution in the Eastern Red-backed Salamander (Plethodon cinereus)." Ohio University / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1473718749599987.

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14

Escoriza, Daniel. "Factors regulating the invasion of two Mediterranean anurans. The role of niche conservatism, species interaction and habitat selection." Doctoral thesis, Universitat de Girona, 2015. http://hdl.handle.net/10803/300902.

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Amphibians are a group in worldwide decline. The factors that are causing this decline are not well known, but could be multifactorial, related to the recent expansion of pathogens and habitat disturbance. One of these factors related to the loss of habitat quality is the introduction of alien species. These species can compete with or prey on species of the recipient community, producing deep changes in the structure of these communities. For this reason it is a priority to know which factors act by facilitating the invasion process and which species could be more affected by the presence of
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15

Zaffos, Andrew A. "Diagnosis and prediction of variations in the environmental distributions of marine fossil taxa across space and time." University of Cincinnati / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1415625754.

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16

Brum, Fernanda Thiesen. "Padrões espaciais de ocorrência de tiranídeos (Aves: Tyrannidae) nas florestas com araucária : aspectos filogenéticos e funcionais." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2011. http://hdl.handle.net/10183/29985.

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Os gradientes de riqueza e diversidade foram extensivamente explorados por ecólogos, estudando as interações dos organismos com o meio em escalas locais, e biogeógrafos, que buscam entender como os organismos se distribuem atualmente e no passado na superfície da terra em relação a dinâmicas de extinção, especiação e dispersão. Mas tão fundamental quanto saber o que determina o número de espécies em um determinado local, é saber o que determina quem são as espécies que ocorrem ali, ou seja, a composição de espécies. Nas últimas décadas, os ecólogos têm reconhecido que a organização das comunid
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17

NABOUT, João Carlos. "Macroecologia do gênero Uca (Crustacea, Decapoda): padrões de diversidade, distribuição e respostas às mudanças climáticas globais." Universidade Federal de Goiás, 2009. http://repositorio.bc.ufg.br/tede/handle/tde/344.

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Made available in DSpace on 2014-07-29T12:05:40Z (GMT). No. of bitstreams: 1 Tese_FINALJoao_Nabout.pdf: 1455749 bytes, checksum: 9b7b11f9fe664d7c2e865eff445ff3d0 (MD5) Previous issue date: 2009-11-17<br>Macroecology of the genus Uca (Crustacea, Decapoda): Patterns of diversity, distribution and responses to global change. The genus Uca, composed by 97 species, has a worldwide distribution on coastal marine regions, mainly in tropical environments. Many researches have used the genus Uca as a model of study, although the actual scientific knowledge about this group is dispersed. Moreover, few
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18

Fagundes, Paula Braga. "Um lugar ao sol : a influência do fator histórico sobre o nicho de luz e respostas ecofisiológicas de plantas com semente da floresta ombrófila mista." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2013. http://hdl.handle.net/10183/90470.

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Em ambientes florestais, a luz é o recurso que com mais frequência limita o crescimento, a sobrevivência e a reprodução em plantas. Assim, a variação na disponibilidade de luz no sub-bosque influencia a composição local de espécies lenhosas, que se segregam em diferentes nichos de luz de acordo com suas preferências e tolerâncias, conferidas através de suas adaptações e plasticidade fenotípica. Os atributos das espécies atuais, além de serem adaptados ao ambiente onde vivem, são um legado de seus ancestrais, motivo pelo qual espécies mais próximas filogeneticamente, com frequência compartilham
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19

Pantenburg, Stefanie. "Kardiovaskuläre Risikofaktoren bei Patienten mit frischem, nicht-arteriitischem Zentralarterienverschluss - Bedeutung der systematischen Abklärung und Einfluss auf die Therapie." Doctoral thesis, 2014. http://hdl.handle.net/11858/00-1735-0000-0022-5E75-9.

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