Global patterns of stream detritivore distribution: Implications for biodiversity loss in changing climates

Detalhes bibliográficos
Autor(a) principal: Boyero, Luz
Data de Publicação: 2012
Outros Autores: Pearson, Richard G., Dudgeon, David, Ferreira, Verónica, Graça, Manuel A. S., Gessner, Mark O., Boulton, Andrew J., Castela, José, et al.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10316/98714
https://doi.org/10.1111/j.1466-8238.2011.00673.x
Resumo: Aim We tested the hypothesis that shredder detritivores, a key trophic guild in stream ecosystems, are more diverse at higher latitudes, which has important ecological implications in the face of potential biodiversity losses that are expected as a result of climate change. We also explored the dependence of local shredder diversity on the regional species pool across latitudes, and examined the influence of environmental factors on shredder diversity. Location World-wide (156 sites from 17 regions located in all inhabited continents at latitudes ranging from 67° N to 41° S). Methods We used linear regression to examine the latitudinal variation in shredder diversity at different spatial scales: alpha (a), gamma (g) and beta (b) diversity. We also explored the effect of g-diversity on a-diversity across latitudes with regression analysis, and the possible influence of local environmental factors on shredder diversity with simple correlations. Results Alpha diversity increased with latitude, while g- and b-diversity showed no clear latitudinal pattern. Temperate sites showed a linear relationship between g- and a-diversity; in contrast, tropical sites showed evidence of local species saturation, which may explain why the latitudinal gradient in a-diversity is not accompanied by a gradient in g-diversity. Alpha diversity was related to several local habitat characteristics, but g- and b-diversity were not related to any of the environmental factors measured. Main conclusions Our results indicate that global patterns of shredder diversity are complex and depend on spatial scale. However, we can draw several conclusions that have important ecological implications. Alpha diversity is limited at tropical sites by local factors, implying a higher risk of loss of key species or the whole shredder guild (the latter implying the loss of trophic diversity). Even if regional species pools are not particularly species poor in the tropics, colonization from adjacent sites may be limited. Moreover, many shredder species belong to cool-adapted taxa that may be close to their thermal maxima in the tropics, which makes them more vulnerable to climate warming. Our results suggest that tropical streams require specific scientific attention and conservation efforts to prevent loss of shredder biodiversity and serious alteration of ecosystem processes.
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spelling Global patterns of stream detritivore distribution: Implications for biodiversity loss in changing climatesDetritusdiversityguildlatitudinal gradientleaf littershreddersspecies richnessstream ecosystemstrophic diversityAim We tested the hypothesis that shredder detritivores, a key trophic guild in stream ecosystems, are more diverse at higher latitudes, which has important ecological implications in the face of potential biodiversity losses that are expected as a result of climate change. We also explored the dependence of local shredder diversity on the regional species pool across latitudes, and examined the influence of environmental factors on shredder diversity. Location World-wide (156 sites from 17 regions located in all inhabited continents at latitudes ranging from 67° N to 41° S). Methods We used linear regression to examine the latitudinal variation in shredder diversity at different spatial scales: alpha (a), gamma (g) and beta (b) diversity. We also explored the effect of g-diversity on a-diversity across latitudes with regression analysis, and the possible influence of local environmental factors on shredder diversity with simple correlations. Results Alpha diversity increased with latitude, while g- and b-diversity showed no clear latitudinal pattern. Temperate sites showed a linear relationship between g- and a-diversity; in contrast, tropical sites showed evidence of local species saturation, which may explain why the latitudinal gradient in a-diversity is not accompanied by a gradient in g-diversity. Alpha diversity was related to several local habitat characteristics, but g- and b-diversity were not related to any of the environmental factors measured. Main conclusions Our results indicate that global patterns of shredder diversity are complex and depend on spatial scale. However, we can draw several conclusions that have important ecological implications. Alpha diversity is limited at tropical sites by local factors, implying a higher risk of loss of key species or the whole shredder guild (the latter implying the loss of trophic diversity). Even if regional species pools are not particularly species poor in the tropics, colonization from adjacent sites may be limited. Moreover, many shredder species belong to cool-adapted taxa that may be close to their thermal maxima in the tropics, which makes them more vulnerable to climate warming. Our results suggest that tropical streams require specific scientific attention and conservation efforts to prevent loss of shredder biodiversity and serious alteration of ecosystem processes.3F10-AC72-52D0 | Verónica Ferreirainfo:eu-repo/semantics/publishedVersion2012info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://hdl.handle.net/10316/98714http://hdl.handle.net/10316/98714https://doi.org/10.1111/j.1466-8238.2011.00673.xeng2-s2.0-84855530321cv-prod-702516Boyero, LuzPearson, Richard G.Dudgeon, DavidFerreira, VerónicaGraça, Manuel A. S.Gessner, Mark O.Boulton, Andrew J.Castela, Joséet al.info: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:RCAAP2022-02-08T11:55:40Zoai:estudogeral.uc.pt:10316/98714Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T21:16:27.656518Repositório 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 Global patterns of stream detritivore distribution: Implications for biodiversity loss in changing climates
title Global patterns of stream detritivore distribution: Implications for biodiversity loss in changing climates
spellingShingle Global patterns of stream detritivore distribution: Implications for biodiversity loss in changing climates
Boyero, Luz
Detritus
diversity
guild
latitudinal gradient
leaf litter
shredders
species richness
stream ecosystems
trophic diversity
title_short Global patterns of stream detritivore distribution: Implications for biodiversity loss in changing climates
title_full Global patterns of stream detritivore distribution: Implications for biodiversity loss in changing climates
title_fullStr Global patterns of stream detritivore distribution: Implications for biodiversity loss in changing climates
title_full_unstemmed Global patterns of stream detritivore distribution: Implications for biodiversity loss in changing climates
title_sort Global patterns of stream detritivore distribution: Implications for biodiversity loss in changing climates
author Boyero, Luz
author_facet Boyero, Luz
Pearson, Richard G.
Dudgeon, David
Ferreira, Verónica
Graça, Manuel A. S.
Gessner, Mark O.
Boulton, Andrew J.
Castela, José
et al.
author_role author
author2 Pearson, Richard G.
Dudgeon, David
Ferreira, Verónica
Graça, Manuel A. S.
Gessner, Mark O.
Boulton, Andrew J.
Castela, José
et al.
author2_role author
author
author
author
author
author
author
author
dc.contributor.author.fl_str_mv Boyero, Luz
Pearson, Richard G.
Dudgeon, David
Ferreira, Verónica
Graça, Manuel A. S.
Gessner, Mark O.
Boulton, Andrew J.
Castela, José
et al.
dc.subject.por.fl_str_mv Detritus
diversity
guild
latitudinal gradient
leaf litter
shredders
species richness
stream ecosystems
trophic diversity
topic Detritus
diversity
guild
latitudinal gradient
leaf litter
shredders
species richness
stream ecosystems
trophic diversity
description Aim We tested the hypothesis that shredder detritivores, a key trophic guild in stream ecosystems, are more diverse at higher latitudes, which has important ecological implications in the face of potential biodiversity losses that are expected as a result of climate change. We also explored the dependence of local shredder diversity on the regional species pool across latitudes, and examined the influence of environmental factors on shredder diversity. Location World-wide (156 sites from 17 regions located in all inhabited continents at latitudes ranging from 67° N to 41° S). Methods We used linear regression to examine the latitudinal variation in shredder diversity at different spatial scales: alpha (a), gamma (g) and beta (b) diversity. We also explored the effect of g-diversity on a-diversity across latitudes with regression analysis, and the possible influence of local environmental factors on shredder diversity with simple correlations. Results Alpha diversity increased with latitude, while g- and b-diversity showed no clear latitudinal pattern. Temperate sites showed a linear relationship between g- and a-diversity; in contrast, tropical sites showed evidence of local species saturation, which may explain why the latitudinal gradient in a-diversity is not accompanied by a gradient in g-diversity. Alpha diversity was related to several local habitat characteristics, but g- and b-diversity were not related to any of the environmental factors measured. Main conclusions Our results indicate that global patterns of shredder diversity are complex and depend on spatial scale. However, we can draw several conclusions that have important ecological implications. Alpha diversity is limited at tropical sites by local factors, implying a higher risk of loss of key species or the whole shredder guild (the latter implying the loss of trophic diversity). Even if regional species pools are not particularly species poor in the tropics, colonization from adjacent sites may be limited. Moreover, many shredder species belong to cool-adapted taxa that may be close to their thermal maxima in the tropics, which makes them more vulnerable to climate warming. Our results suggest that tropical streams require specific scientific attention and conservation efforts to prevent loss of shredder biodiversity and serious alteration of ecosystem processes.
publishDate 2012
dc.date.none.fl_str_mv 2012
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
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dc.identifier.uri.fl_str_mv http://hdl.handle.net/10316/98714
http://hdl.handle.net/10316/98714
https://doi.org/10.1111/j.1466-8238.2011.00673.x
url http://hdl.handle.net/10316/98714
https://doi.org/10.1111/j.1466-8238.2011.00673.x
dc.language.iso.fl_str_mv eng
language eng
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cv-prod-702516
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instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
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collection Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
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