Thermal tolerance and sensitivity of amphibian larvae from Paleartic and Neotropical communities

Detalhes bibliográficos
Autor(a) principal: Novo, Marco Jacinto Katzenberger Baptista
Data de Publicação: 2009
Tipo de documento: Dissertação
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10451/1416
Resumo: Tese de mestrado, Biologia (Biologia da Conservação), 2009, Universidade de Lisboa, Faculdade de Ciências
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spelling Thermal tolerance and sensitivity of amphibian larvae from Paleartic and Neotropical communitiesHerpetologiaAnfíbiosAlterações climáticasTeses de mestradoTese de mestrado, Biologia (Biologia da Conservação), 2009, Universidade de Lisboa, Faculdade de CiênciasAmphibians across the world are threatened by climate change. This work deals with the analysis of thermal tolerance and sensitivity and their latitudinal variation at the community level, with the intent of examining the prediction that tropical amphibians are at higher risk of extinction due to global warming than temperate species since their environmental temperatures are closer to their upper thermal limits. To test this prediction, two larval amphibian communities were selected from contrasting latitudes: subtropical (Argentina) and temperate Mediterranean (Iberian Peninsula) climates. In both locations, the following key parameters were obtained: 1) environmental pond temperatures (Thab), by monitoring ponds at different locations using water dataloggers; 2) critical thermal maximum, using a dynamic method called CTmax or knockdown temperature, to assess how close environmental temperatures are from their upper thermal limit; and 3) optimum temperature (Topt), by analysing tadpole's maximum swimming speed at different temperatures and building thermal performance curves (TPCs), to determine how changes in environmental temperatures will affect the ability to perform ecologically relevant functions and therefore their general fitness. Warming Tolerance (WT) (WT=CTmax-Thab) and Thermal Safety Margins (TSM) (TSM=Topt-Thab) were also calculated for all species. Analyses of CTmax and optimal performance temperature indicate that species have adapted their critical and optimal temperatures to cope with environmental conditions. Species exposed to higher maximum or average temperatures usually have higher CTmax or optimum temperatures, respectively. In addition, there is a significant positive correlation between these traits. Results also show that Argentinean subtropical species, although having higher CTmax and optimum temperature values, have lower WT and narrower TSM. Therefore, these species generally appear to be in greater extinction risk than temperate species from the Iberian Peninsula, under predicted scenarios of rising temperatures and climate changeResumo alargado em português disponível no documentoTejedo, MiguelRebelo, Rui Miguel Borges Sampaio eRepositório da Universidade de LisboaNovo, Marco Jacinto Katzenberger Baptista2010-07-27T08:58:09Z20092009-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisapplication/pdfapplication/pdftext/xmlhttp://hdl.handle.net/10451/1416enghttp://catalogo.ul.pt/F/?func=item-global&doc_library=ULB01&type=03&doc_number=000569378info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-11-08T15:40:55Zoai:repositorio.ul.pt:10451/1416Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T21:28:03.773361Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv Thermal tolerance and sensitivity of amphibian larvae from Paleartic and Neotropical communities
title Thermal tolerance and sensitivity of amphibian larvae from Paleartic and Neotropical communities
spellingShingle Thermal tolerance and sensitivity of amphibian larvae from Paleartic and Neotropical communities
Novo, Marco Jacinto Katzenberger Baptista
Herpetologia
Anfíbios
Alterações climáticas
Teses de mestrado
title_short Thermal tolerance and sensitivity of amphibian larvae from Paleartic and Neotropical communities
title_full Thermal tolerance and sensitivity of amphibian larvae from Paleartic and Neotropical communities
title_fullStr Thermal tolerance and sensitivity of amphibian larvae from Paleartic and Neotropical communities
title_full_unstemmed Thermal tolerance and sensitivity of amphibian larvae from Paleartic and Neotropical communities
title_sort Thermal tolerance and sensitivity of amphibian larvae from Paleartic and Neotropical communities
author Novo, Marco Jacinto Katzenberger Baptista
author_facet Novo, Marco Jacinto Katzenberger Baptista
author_role author
dc.contributor.none.fl_str_mv Tejedo, Miguel
Rebelo, Rui Miguel Borges Sampaio e
Repositório da Universidade de Lisboa
dc.contributor.author.fl_str_mv Novo, Marco Jacinto Katzenberger Baptista
dc.subject.por.fl_str_mv Herpetologia
Anfíbios
Alterações climáticas
Teses de mestrado
topic Herpetologia
Anfíbios
Alterações climáticas
Teses de mestrado
description Tese de mestrado, Biologia (Biologia da Conservação), 2009, Universidade de Lisboa, Faculdade de Ciências
publishDate 2009
dc.date.none.fl_str_mv 2009
2009-01-01T00:00:00Z
2010-07-27T08:58:09Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/masterThesis
format masterThesis
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/10451/1416
url http://hdl.handle.net/10451/1416
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv http://catalogo.ul.pt/F/?func=item-global&doc_library=ULB01&type=03&doc_number=000569378
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
application/pdf
text/xml
dc.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron:RCAAP
instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron_str RCAAP
institution RCAAP
reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
collection Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository.name.fl_str_mv Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
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