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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Avifauna em ?reas com diferentes est?dios de conserva??o no Espinha?o Meridional / Birds in areas with different levels of conservation in Southern Espinha?o

Oliveira, Lelis Vaz Leite de 16 August 2013 (has links)
Submitted by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2015-01-06T23:44:13Z No. of bitstreams: 2 lelis_vaz_leite_oliveira.pdf: 2388952 bytes, checksum: 4d43bd58c8b2ec58bf2ad86b22291639 (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) / Approved for entry into archive by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2015-01-06T23:46:34Z (GMT) No. of bitstreams: 2 lelis_vaz_leite_oliveira.pdf: 2388952 bytes, checksum: 4d43bd58c8b2ec58bf2ad86b22291639 (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) / Approved for entry into archive by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2015-01-06T23:47:07Z (GMT) No. of bitstreams: 2 lelis_vaz_leite_oliveira.pdf: 2388952 bytes, checksum: 4d43bd58c8b2ec58bf2ad86b22291639 (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) / Made available in DSpace on 2015-01-06T23:47:07Z (GMT). No. of bitstreams: 2 lelis_vaz_leite_oliveira.pdf: 2388952 bytes, checksum: 4d43bd58c8b2ec58bf2ad86b22291639 (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) Previous issue date: 2013 / Impactos ambientais comprometem direta ou indiretamente a riqueza e estrutura tr?fica da avifauna local e regional e informa??es sobre esta tem?tica s?o escassas para as forma??es do Cerrado, em especial para a o Espinha?o Meridional. Assim, este estudo busca fornecer informa??es sobre a conserva??o, endemismo e estrutura tr?fica da avifauna em forma??es sav?nicas (cerrado t?pico e cerrado rupestre), de tr?s ?reas que se encontram em diferentes est?dios de conserva??o na Serra do Espinha?o Meridional. Em cada ?rea foi pr?-estabelecido um transecto de 5 km, os quais foram visitados mensalmente. Cada uma dessas visitas teve dura??o de oito horas, totalizando 120 horas/ ?rea. Ao percorrer tais transectos, foram registradas todas as aves vistas e/ou ouvidas. Foi avaliado o status de degrada??o de cada ?rea estudada, por meio de uma matriz de impactos e a quantifica??o estrutural da paisagem foi feita por meio de ?ndices de composi??o e configura??o espacial. No Parque Estadual do Biribiri e antigo dep?sito de lixos de Diamantina (BL) foram registradas 123 esp?cies de aves distribu?das em 34 fam?lias. Para o RP foram registradas 88 esp?cies e 28 fam?lias e para a ?rea de Prote??o Ambiental Pau-de-Fruta (PF) foram registradas 76 esp?cies e 23 fam?lias. Considerando que o pior cen?rio de impactos poss?vel, no qual todos os crit?rios est?o com a maior pontua??o alcan??vel some 132, o RP atingiu 25% (33 pontos), o PF 26,5% (35 pontos) e o BL 60,6% (80 pontos). Em rela??o ? estrutura tr?fica n?o houve diferen?as significativas entre as ?reas estudadas tanto para todo o per?odo analisado (H = 5,670; p = 0,127), como para as duas esta??es seca (H = 5,436; p= 0,145) e chuvosa (H = 4,744; p = 0,191) e demonstrou um predom?nio de esp?cies inset?voras, seguidas por frug?voras e on?voras. A insetivoria foi a guilda mais predominante durante as duas esta??es em todos os ambientes estudados. Houve uma consider?vel similaridade da avifauna entre as ?reas. Os padr?es encontrados por este estudo refor?am a necessidade melhor compreens?o de ambientes antropizados, principalmente aqueles em ?reas de forma??es sav?nicas, onde a avifauna indica uma tend?ncia a apresentar maior plasticidade e amplitude ambiental. / Disserta??o (Mestrado) ? Programa de P?s-Gradua??o em Ci?ncia Florestal, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2013. / ABSTRACT Environmental impacts directly or indirectly compromise the richness and trophic structure of local and regional avifauna and information on this subject are scarce for the formations of the Cerrado, especially to the southern Espinha?o. Thus, this study aims to provide information about conservation, endemism and trophic structure of the avifauna in savanna formations (typical cerrado and grasslands) of three areas that are at different stages of conservation in the southern Espinha?o. In each area was pre-established a transect of 5 km, which were visited monthly. Each of these visits lasted eight hours, totaling 120 hours/area. In such transects were recorded all birds seen and / or heard. The deterioration status of each studied by means of an array of structural impacts and quantification of the landscape area was made ??by compounding rates and spatial configuration was evaluated. In the Biribiri State Park and ancient deposit of waste from Diamantina (BL) 123 species of birds distributed in 34 families were recorded. RP for 88 species and 28 families were recorded and the Environmental Protection Area Pau-de-fruit (PF) 76 species and 23 families were recorded. . In the Biribiri State Park and ancient deposit of waste from Diamantina (BL) 123 species of birds distributed in 34 families were recorded. In the Rio Preto State Park (RP) 88 species and 28 families were recorded and at the Environmental Protection Area Pau-de-Fruta (PF) 76 species and 23 families were recorded. Whereas the worst possible impacts, where all criteria are reached with the highest score some 132, RP reached 25% (33 points), PF 26.5% (35 points) and 60.6% BL (80 points). Regarding the trophic structure there were no significant differences among the studied areas for the entire period analyzed both (H = 5.670, p = 0.127) and for the two dry seasons (H = 5.436, p = 0.145) and wet (H = 4,744 p = 0.191) and demonstrated a predominance of insectivores, followed by frugivorous and omnivorous species. The insectivorous guild was most prevalent during the two seasons in all environments studied. There was considerable similarity between the avifauna in the study areas. The patterns found in this study reinforce the need for better understanding of anthropogenic environments, especially those in areas of savanna formations where birdlife indicates a tendency to have higher plasticity and environmental amplitude.
2

Avifauna em ?reas com diferentes est?dios de conserva??o no Espinha?o Meridional / Birds in areas with different levels of conservation in Southern Espinha?o

Oliveira, Lelis Vaz Leite de 16 August 2013 (has links)
?rea de concentra??o: Conserva??o e Restaura??o de Ecossistemas Florestais. / Submitted by Jos? Henrique Henrique (jose.neves@ufvjm.edu.br) on 2018-03-07T19:22:48Z No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) lelis_vaz_leite_oliveira.pdf: 2388952 bytes, checksum: 4d43bd58c8b2ec58bf2ad86b22291639 (MD5) / Approved for entry into archive by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2018-03-09T19:57:08Z (GMT) No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) lelis_vaz_leite_oliveira.pdf: 2388952 bytes, checksum: 4d43bd58c8b2ec58bf2ad86b22291639 (MD5) / Made available in DSpace on 2018-03-09T19:57:08Z (GMT). No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) lelis_vaz_leite_oliveira.pdf: 2388952 bytes, checksum: 4d43bd58c8b2ec58bf2ad86b22291639 (MD5) Previous issue date: 2013 / Impactos ambientais comprometem direta ou indiretamente a riqueza e estrutura tr?fica da avifauna local e regional e informa??es sobre esta tem?tica s?o escassas para as forma??es do Cerrado, em especial para a o Espinha?o Meridional. Assim, este estudo busca fornecer informa??es sobre a conserva??o, endemismo e estrutura tr?fica da avifauna em forma??es sav?nicas (cerrado t?pico e cerrado rupestre), de tr?s ?reas que se encontram em diferentes est?dios de conserva??o na Serra do Espinha?o Meridional. Em cada ?rea foi pr?-estabelecido um transecto de 5 km, os quais foram visitados mensalmente. Cada uma dessas visitas teve dura??o de oito horas, totalizando 120 horas/ ?rea. Ao percorrer tais transectos, foram registradas todas as aves vistas e/ou ouvidas. Foi avaliado o status de degrada??o de cada ?rea estudada, por meio de uma matriz de impactos e a quantifica??o estrutural da paisagem foi feita por meio de ?ndices de composi??o e configura??o espacial. No Parque Estadual do Biribiri e antigo dep?sito de lixos de Diamantina (BL) foram registradas 123 esp?cies de aves distribu?das em 34 fam?lias. Para o RP foram registradas 88 esp?cies e 28 fam?lias e para a ?rea de Prote??o Ambiental Pau-de-Fruta (PF) foram registradas 76 esp?cies e 23 fam?lias. Considerando que o pior cen?rio de impactos poss?vel, no qual todos os crit?rios est?o com a maior pontua??o alcan??vel some 132, o RP atingiu 25% (33 pontos), o PF 26,5% (35 pontos) e o BL 60,6% (80 pontos). Em rela??o ? estrutura tr?fica n?o houve diferen?as significativas entre as ?reas estudadas tanto para todo o per?odo analisado (H = 5,670; p = 0,127), como para as duas esta??es seca (H = 5,436; p= 0,145) e chuvosa (H = 4,744; p = 0,191) e demonstrou um predom?nio de esp?cies inset?voras, seguidas por frug?voras e on?voras. A insetivoria foi a guilda mais predominante durante as duas esta??es em todos os ambientes estudados. Houve uma consider?vel similaridade da avifauna entre as ?reas. Os padr?es encontrados por este estudo refor?am a necessidade melhor compreens?o de ambientes antropizados, principalmente aqueles em ?reas de forma??es sav?nicas, onde a avifauna indica uma tend?ncia a apresentar maior plasticidade e amplitude ambiental. / Disserta??o (Mestrado) ? Programa de P?s-Gradua??o em Ci?ncia Florestal, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2013. / Environmental impacts directly or indirectly compromise the richness and trophic structure of local and regional avifauna and information on this subject are scarce for the formations of the Cerrado, especially to the southern Espinha?o. Thus, this study aims to provide information about conservation, endemism and trophic structure of the avifauna in savanna formations (typical cerrado and grasslands) of three areas that are at different stages of conservation in the southern Espinha?o. In each area was pre-established a transect of 5 km, which were visited monthly. Each of these visits lasted eight hours, totaling 120 hours/area. In such transects were recorded all birds seen and / or heard. The deterioration status of each studied by means of an array of structural impacts and quantification of the landscape area was made by compounding rates and spatial configuration was evaluated. In the Biribiri State Park and ancient deposit of waste from Diamantina (BL) 123 species of birds distributed in 34 families were recorded. RP for 88 species and 28 families were recorded and the Environmental Protection Area Pau-de-fruit (PF) 76 species and 23 families were recorded. . In the Biribiri State Park and ancient deposit of waste from Diamantina (BL) 123 species of birds distributed in 34 families were recorded. In the Rio Preto State Park (RP) 88 species and 28 families were recorded and at the Environmental Protection Area Pau-de-Fruta (PF) 76 species and 23 families were recorded. Whereas the worst possible impacts, where all criteria are reached with the highest score some 132, RP reached 25% (33 points), PF 26.5% (35 points) and 60.6% BL (80 points). Regarding the trophic structure there were no significant differences among the studied areas for the entire period analyzed both (H = 5.670, p = 0.127) and for the two dry seasons (H = 5.436, p = 0.145) and wet (H = 4,744 p = 0.191) and demonstrated a predominance of insectivores, followed by frugivorous and omnivorous species. The insectivorous guild was most prevalent during the two seasons in all environments studied. There was considerable similarity between the avifauna in the study areas. The patterns found in this study reinforce the need for better understanding of anthropogenic environments, especially those in areas of savanna formations where birdlife indicates a tendency to have higher plasticity and environmental amplitude.
3

Macroecologia e conserva??o de m?ltiplas dimens?es da biodiversidade

Oliveira, Brunno Freire Dantas de 26 July 2016 (has links)
Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2017-01-10T15:45:26Z No. of bitstreams: 1 BrunnoFreireDantasDeOliveira_TESE.pdf: 6640940 bytes, checksum: ad49d75685e2ea80ce1bd97392f6f888 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2017-01-11T16:14:37Z (GMT) No. of bitstreams: 1 BrunnoFreireDantasDeOliveira_TESE.pdf: 6640940 bytes, checksum: ad49d75685e2ea80ce1bd97392f6f888 (MD5) / Made available in DSpace on 2017-01-11T16:14:37Z (GMT). No. of bitstreams: 1 BrunnoFreireDantasDeOliveira_TESE.pdf: 6640940 bytes, checksum: ad49d75685e2ea80ce1bd97392f6f888 (MD5) Previous issue date: 2016-07-26 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / Determinar os mecanismos respons?veis pelos padr?es espaciais de biodiversidade t?m sido um dos maiores desafios para ec?logos e bioge?grafos. Durante a ?ltima d?cada houve um grande aumento no n?mero de estudos documentando padr?es de biodiversidade em larga escala. Atualmente, padr?es globais de riqueza de esp?cies s?o bem conhecidos para v?rios grupos de organismos. Entretanto, biodiversidade inclui v?rias dimens?es al?m da riqueza de esp?cies, como a diversidade filogen?tica e a diversidade funcional. Estas dimens?es s?o mais informativas do que simples medidas de riqueza de esp?cies e, consequentemente, podem permitir testes mais poderosos acerca de teorias de biodiversidade. Particularmente importante, conservar a biodiversidade em suas m?ltiplas dimens?es ? necess?rio para garantir a resili?ncia dos servi?os ecossist?micos e manter as hist?rias evolutivas das esp?cies. Neste contexto, a presente tese se configura na interface entre macroecologia e conserva??o, utilizando uma abordagem integradora que considera a conex?o entre mais de uma dimens?o da biodiversidade. No primeiro cap?tulo foram avaliadas hip?teses que invocam din?micas de equil?brio ou n?o-equil?brio para explicar a riqueza de esp?cies e diversidade funcional de mam?feros globalmente. Integrando informa??es sobre riqueza de esp?cies e diversidade funcional, eu abordo estas quest?es e clarifico os mecanismos que geraram e mant?m a diversidade de mam?feros e suas hist?rias de vida. O segundo cap?tulo representam uma base de dados sobre caracter?sticas biol?gicas de anf?bios globalmente: AmphiBIO. Esta base de dados centraliza informa??es sobre 19 caracter?sticas relacionadas ? ecologia, morfologia e reprodu??o de anf?bios. Os dados foram agregados a partir de mais de 1.500 fontes, e t?m potencial para auxiliar pesquisas mais amplas em ecologia de comunidades, evolu??o, biogeografia e conserva??o de anf?bios. No terceiro cap?tulo, utilizando o AmphiBIO, testo a suposi??o de que a perda de diversidade filogen?tica estaria associada ? perda de diversidade funcional. Para isso, a extin??o de anf?bios amea?ados foi simulada, as perdas de diversidade filogen?tica e funcional calculadas, e sua correla??o verificada. As perdas de diversidade foram analisadas atrav?s da filogenia dos anf?bios e do espa?o geogr?fico global. Esta tese contribui para um melhor entendimento dos mecanismos que originaram e mant?m os gradientes globais de riqueza de esp?cies, servindo de est?mulo para estudos futuros em ecologia e evolu??o, e para auxiliar decis?es pol?ticas visando a minimiza??o dos efeitos das extin??es sobre a perda de biodiversidade. / Determining the mechanisms underlying spatial variation in biodiversity has long been the main challenge for ecologists and biogeographers. The past decade has seen a veritable explosion of studies documenting broad-scale spatial patterns in biodiversity. Nowadays, broad-scale patterns of species richness (SR) are well documented for several groups. However, biodiversity encompass variation in several aspects beyond SR, such as phylogenetic diversity (PD) and functional (or trait) diversity (FD). These dimensions have been argued to aid more powerful tests of biodiversity theories because they can capture the diversity of life better than simple measures of SR. Particularly important, the conservation of biodiversity and its multiple dimensions have been advocated as necessary to ensure the resilience of ecosystem services and maintain important evolutionary history. The present thesis is set on the interface between macroecology and biodiversity conservation, and uses integrated approaches that consider the connection between more than one dimension of biodiversity. In the first chapter, I we evaluate four prominent hypotheses which invoke either equilibrium (more individuals, niche diversity) or non-equilibrium dynamics (diversification rate, evolutionary time) to explain species richness and functional diversity of mammals worldwide. While equilibrium and non-equilibrium hypotheses have received considerable attention in the literature and some empirical support, it remains unknown whether they can explain the diversity of species and their traits alike. By integrating information on species richness and functional diversity, I address these issues and shed light on the mechanisms that generated the diversity of mammals and their life histories. The second chapter represents a database on natural history traits for amphibians worldwide: AmphiBIO. This database centralizes information on 19 traits related to ecology, morphology and reproduction features of amphibians. Data were assembled from more than 1,500 sources, and has potential to support a more comprehensive research in evolution, community ecology, biogeography and conservation of amphibians. The third chapter uses information from AmphiBIO to test the assumption that loss of PD is associated with loss of FD. We simulated species extinction scenarios based on IUCN criteria, calculated the loss of PD and FD, and verified the correlation. Analyzes were carried out across the complete amphibian tree and across worldwide amphibian assemblages. This study highlights for the possible negative consequences of local amphibians extinctions that may impact the continuous provision of ecosystem services. This thesis adds to better understand the mechanisms on the origination of global gradients of species diversity. Finally, I hope this thesis can be used to stimulate future studies on ecology and evolution, and support political decisions on minimizing the effects of projected species extinctions on biodiversity loss.

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