Ecosystem fragmentation drives increased diet variation in an endemic livebearing fish of the Bahamas
Autor(a) principal: | |
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Data de Publicação: | 2014 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1002/ece3.1140 http://hdl.handle.net/11449/116185 |
Resumo: | One consequence of human-driven habitat degradation in general, and habitat fragmentation in particular, is loss of biodiversity. An often-underappreciated aspect of habitat fragmentation relates to changes in the ecology of species that persist in altered habitats. In Bahamian wetlands, ecosystem fragmentation causes disruption of hydrological connectivity between inland fragmented wetlands and adjacent marine areas, with the consequent loss of marine piscivores from fragmented sections. We took advantage of this environmental gradient to investigate effects of ecosystem fragmentation on patterns of resource use in the livebearing fish Gambusia hubbsi (Family Poeciliidae), using both population- and individual-level perspectives. We show that fragmentation-induced release from predation led to increased G. hubbsi population densities, which consequently led to lower mean growth rates, likely as a result of higher intraspecific competition for food. This was accompanied by a broadening of dietary niches via increased interindividual diet variation, suggesting a negative effect of predation and a positive effect of intraspecific competition on the degree of diet variation in natural populations. Our results therefore indicate that habitat fragmentation can greatly impact the ecology of resilient populations, with potentially important ecological and evolutionary implications. |
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Repositório Institucional da UNESP |
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Ecosystem fragmentation drives increased diet variation in an endemic livebearing fish of the BahamasBahamas mosquitofishfood websindividual specializationniche variationpredationRNA/DNA ratiosstable isotopesOne consequence of human-driven habitat degradation in general, and habitat fragmentation in particular, is loss of biodiversity. An often-underappreciated aspect of habitat fragmentation relates to changes in the ecology of species that persist in altered habitats. In Bahamian wetlands, ecosystem fragmentation causes disruption of hydrological connectivity between inland fragmented wetlands and adjacent marine areas, with the consequent loss of marine piscivores from fragmented sections. We took advantage of this environmental gradient to investigate effects of ecosystem fragmentation on patterns of resource use in the livebearing fish Gambusia hubbsi (Family Poeciliidae), using both population- and individual-level perspectives. We show that fragmentation-induced release from predation led to increased G. hubbsi population densities, which consequently led to lower mean growth rates, likely as a result of higher intraspecific competition for food. This was accompanied by a broadening of dietary niches via increased interindividual diet variation, suggesting a negative effect of predation and a positive effect of intraspecific competition on the degree of diet variation in natural populations. Our results therefore indicate that habitat fragmentation can greatly impact the ecology of resilient populations, with potentially important ecological and evolutionary implications.Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)National Science FoundationUniv Estadual Paulista, Dept Ecol, Inst Biociencias, BR-13506900 Rio Claro, SP, BrazilN Carolina State Univ, Dept Biol Sci, Raleigh, NC 27695 USAN Carolina State Univ, WM Keck Ctr Behav Biol, Raleigh, NC 27695 USAFlorida Int Univ, Marine Sci Program, Dept Biol Sci, North Miami, FL 33181 USAUniv Estadual Paulista, Dept Ecol, Inst Biociencias, BR-13506900 Rio Claro, SP, BrazilCAPES: BEX 4496/08-6FAPESP: 10/15567-8National Science FoundationOCE 0746164National Science FoundationDEB 0842196Wiley-BlackwellUniversidade Estadual Paulista (Unesp)N Carolina State UnivFlorida Int UnivAraujo, Marcio S. [UNESP]Langerhans, R. BrianGiery, Sean T.Layman, Craig A.2015-03-18T15:52:33Z2015-03-18T15:52:33Z2014-08-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article3298-3308application/pdfhttp://dx.doi.org/10.1002/ece3.1140Ecology And Evolution. Hoboken: Wiley-blackwell, v. 4, n. 16, p. 3298-3308, 2014.2045-7758http://hdl.handle.net/11449/11618510.1002/ece3.1140WOS:000341188300014WOS000341188300014.pdfWeb of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengEcology And Evolution2.3401,356info:eu-repo/semantics/openAccess2023-11-26T06:12:15Zoai:repositorio.unesp.br:11449/116185Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462023-11-26T06:12:15Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Ecosystem fragmentation drives increased diet variation in an endemic livebearing fish of the Bahamas |
title |
Ecosystem fragmentation drives increased diet variation in an endemic livebearing fish of the Bahamas |
spellingShingle |
Ecosystem fragmentation drives increased diet variation in an endemic livebearing fish of the Bahamas Araujo, Marcio S. [UNESP] Bahamas mosquitofish food webs individual specialization niche variation predation RNA/DNA ratios stable isotopes |
title_short |
Ecosystem fragmentation drives increased diet variation in an endemic livebearing fish of the Bahamas |
title_full |
Ecosystem fragmentation drives increased diet variation in an endemic livebearing fish of the Bahamas |
title_fullStr |
Ecosystem fragmentation drives increased diet variation in an endemic livebearing fish of the Bahamas |
title_full_unstemmed |
Ecosystem fragmentation drives increased diet variation in an endemic livebearing fish of the Bahamas |
title_sort |
Ecosystem fragmentation drives increased diet variation in an endemic livebearing fish of the Bahamas |
author |
Araujo, Marcio S. [UNESP] |
author_facet |
Araujo, Marcio S. [UNESP] Langerhans, R. Brian Giery, Sean T. Layman, Craig A. |
author_role |
author |
author2 |
Langerhans, R. Brian Giery, Sean T. Layman, Craig A. |
author2_role |
author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) N Carolina State Univ Florida Int Univ |
dc.contributor.author.fl_str_mv |
Araujo, Marcio S. [UNESP] Langerhans, R. Brian Giery, Sean T. Layman, Craig A. |
dc.subject.por.fl_str_mv |
Bahamas mosquitofish food webs individual specialization niche variation predation RNA/DNA ratios stable isotopes |
topic |
Bahamas mosquitofish food webs individual specialization niche variation predation RNA/DNA ratios stable isotopes |
description |
One consequence of human-driven habitat degradation in general, and habitat fragmentation in particular, is loss of biodiversity. An often-underappreciated aspect of habitat fragmentation relates to changes in the ecology of species that persist in altered habitats. In Bahamian wetlands, ecosystem fragmentation causes disruption of hydrological connectivity between inland fragmented wetlands and adjacent marine areas, with the consequent loss of marine piscivores from fragmented sections. We took advantage of this environmental gradient to investigate effects of ecosystem fragmentation on patterns of resource use in the livebearing fish Gambusia hubbsi (Family Poeciliidae), using both population- and individual-level perspectives. We show that fragmentation-induced release from predation led to increased G. hubbsi population densities, which consequently led to lower mean growth rates, likely as a result of higher intraspecific competition for food. This was accompanied by a broadening of dietary niches via increased interindividual diet variation, suggesting a negative effect of predation and a positive effect of intraspecific competition on the degree of diet variation in natural populations. Our results therefore indicate that habitat fragmentation can greatly impact the ecology of resilient populations, with potentially important ecological and evolutionary implications. |
publishDate |
2014 |
dc.date.none.fl_str_mv |
2014-08-01 2015-03-18T15:52:33Z 2015-03-18T15:52:33Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1002/ece3.1140 Ecology And Evolution. Hoboken: Wiley-blackwell, v. 4, n. 16, p. 3298-3308, 2014. 2045-7758 http://hdl.handle.net/11449/116185 10.1002/ece3.1140 WOS:000341188300014 WOS000341188300014.pdf |
url |
http://dx.doi.org/10.1002/ece3.1140 http://hdl.handle.net/11449/116185 |
identifier_str_mv |
Ecology And Evolution. Hoboken: Wiley-blackwell, v. 4, n. 16, p. 3298-3308, 2014. 2045-7758 10.1002/ece3.1140 WOS:000341188300014 WOS000341188300014.pdf |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Ecology And Evolution 2.340 1,356 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
3298-3308 application/pdf |
dc.publisher.none.fl_str_mv |
Wiley-Blackwell |
publisher.none.fl_str_mv |
Wiley-Blackwell |
dc.source.none.fl_str_mv |
Web of Science reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1799965075105120257 |