Land-use intensification systematically alters the size structure of aquatic communities in the Neotropics
Autor(a) principal: | |
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Data de Publicação: | 2023 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1111/gcb.16720 http://hdl.handle.net/11449/247300 |
Resumo: | Land-use and land-cover transitions can affect biodiversity and ecosystem functioning in a myriad of ways, including how energy is transferred within food-webs. Size spectra (i.e. relationships between body size and biomass or abundance) provide a means to assess how food-webs respond to environmental stressors by depicting how energy is transferred from small to larger organisms. Here, we investigated changes in the size spectrum of aquatic macroinvertebrates along a broad land-use intensification gradient (from Atlantic Forest to mechanized agriculture) in 30 Brazilian streams. We expected to find a steeper size spectrum slope and lower total biomass in more disturbed streams due to higher energetic expenditure in physiologically stressful conditions, which has a disproportionate impact on large individuals. As expected, we found that more disturbed streams had fewer small organisms than pristine forest streams, but, surprisingly, they had shallower size spectrum slopes, which indicates that energy might be transferred more efficiently in disturbed streams. Disturbed streams were also less taxonomically diverse, suggesting that the potentially higher energy transfer in these webs might be channelled via a few efficient trophic links. However, because total biomass was higher in pristine streams, these sites still supported a greater number of larger organisms and longer food chains (i.e. larger size range). Our results indicate that land-use intensification decreases ecosystem stability and enhances vulnerability to population extinctions by reducing the possible energetic pathways while enhancing efficiency between the remaining food-web linkages. Our study represents a step forward in understanding how land-use intensification affects trophic interactions and ecosystem functioning in aquatic systems. |
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Land-use intensification systematically alters the size structure of aquatic communities in the Neotropicsaquatic insectsbenthic macroinvertebratesenergy transferfood-webfreshwater ecosystemsindividual size distributionsland-use intensificationlength–mass equationmacroecologymetabolic theoryLand-use and land-cover transitions can affect biodiversity and ecosystem functioning in a myriad of ways, including how energy is transferred within food-webs. Size spectra (i.e. relationships between body size and biomass or abundance) provide a means to assess how food-webs respond to environmental stressors by depicting how energy is transferred from small to larger organisms. Here, we investigated changes in the size spectrum of aquatic macroinvertebrates along a broad land-use intensification gradient (from Atlantic Forest to mechanized agriculture) in 30 Brazilian streams. We expected to find a steeper size spectrum slope and lower total biomass in more disturbed streams due to higher energetic expenditure in physiologically stressful conditions, which has a disproportionate impact on large individuals. As expected, we found that more disturbed streams had fewer small organisms than pristine forest streams, but, surprisingly, they had shallower size spectrum slopes, which indicates that energy might be transferred more efficiently in disturbed streams. Disturbed streams were also less taxonomically diverse, suggesting that the potentially higher energy transfer in these webs might be channelled via a few efficient trophic links. However, because total biomass was higher in pristine streams, these sites still supported a greater number of larger organisms and longer food chains (i.e. larger size range). Our results indicate that land-use intensification decreases ecosystem stability and enhances vulnerability to population extinctions by reducing the possible energetic pathways while enhancing efficiency between the remaining food-web linkages. Our study represents a step forward in understanding how land-use intensification affects trophic interactions and ecosystem functioning in aquatic systems.Graduate Program in Environmental Sciences Federal University of São CarlosSchool of Life and Health Sciences University of RoehamptonOceanography and Limnology Department Federal University of Rio Grande do NorteInstitute of Biosciences São Paulo State University (UNESP)School of Biological Sciences University of CanterburyEnvironmental Sciences Department Federal University of São CarlosInstitute of Biosciences São Paulo State University (UNESP)Universidade Federal de São Carlos (UFSCar)University of RoehamptonFederal University of Rio Grande do NorteUniversidade Estadual Paulista (UNESP)University of CanterburyCollyer, GiovannaPerkins, Daniel M.Petsch, Danielle K.Siqueira, Tadeu [UNESP]Saito, Victor2023-07-29T13:12:21Z2023-07-29T13:12:21Z2023-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://dx.doi.org/10.1111/gcb.16720Global Change Biology.1365-24861354-1013http://hdl.handle.net/11449/24730010.1111/gcb.167202-s2.0-85157967852Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengGlobal Change Biologyinfo:eu-repo/semantics/openAccess2023-07-29T13:12:21Zoai:repositorio.unesp.br:11449/247300Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T18:56:56.585890Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Land-use intensification systematically alters the size structure of aquatic communities in the Neotropics |
title |
Land-use intensification systematically alters the size structure of aquatic communities in the Neotropics |
spellingShingle |
Land-use intensification systematically alters the size structure of aquatic communities in the Neotropics Collyer, Giovanna aquatic insects benthic macroinvertebrates energy transfer food-web freshwater ecosystems individual size distributions land-use intensification length–mass equation macroecology metabolic theory |
title_short |
Land-use intensification systematically alters the size structure of aquatic communities in the Neotropics |
title_full |
Land-use intensification systematically alters the size structure of aquatic communities in the Neotropics |
title_fullStr |
Land-use intensification systematically alters the size structure of aquatic communities in the Neotropics |
title_full_unstemmed |
Land-use intensification systematically alters the size structure of aquatic communities in the Neotropics |
title_sort |
Land-use intensification systematically alters the size structure of aquatic communities in the Neotropics |
author |
Collyer, Giovanna |
author_facet |
Collyer, Giovanna Perkins, Daniel M. Petsch, Danielle K. Siqueira, Tadeu [UNESP] Saito, Victor |
author_role |
author |
author2 |
Perkins, Daniel M. Petsch, Danielle K. Siqueira, Tadeu [UNESP] Saito, Victor |
author2_role |
author author author author |
dc.contributor.none.fl_str_mv |
Universidade Federal de São Carlos (UFSCar) University of Roehampton Federal University of Rio Grande do Norte Universidade Estadual Paulista (UNESP) University of Canterbury |
dc.contributor.author.fl_str_mv |
Collyer, Giovanna Perkins, Daniel M. Petsch, Danielle K. Siqueira, Tadeu [UNESP] Saito, Victor |
dc.subject.por.fl_str_mv |
aquatic insects benthic macroinvertebrates energy transfer food-web freshwater ecosystems individual size distributions land-use intensification length–mass equation macroecology metabolic theory |
topic |
aquatic insects benthic macroinvertebrates energy transfer food-web freshwater ecosystems individual size distributions land-use intensification length–mass equation macroecology metabolic theory |
description |
Land-use and land-cover transitions can affect biodiversity and ecosystem functioning in a myriad of ways, including how energy is transferred within food-webs. Size spectra (i.e. relationships between body size and biomass or abundance) provide a means to assess how food-webs respond to environmental stressors by depicting how energy is transferred from small to larger organisms. Here, we investigated changes in the size spectrum of aquatic macroinvertebrates along a broad land-use intensification gradient (from Atlantic Forest to mechanized agriculture) in 30 Brazilian streams. We expected to find a steeper size spectrum slope and lower total biomass in more disturbed streams due to higher energetic expenditure in physiologically stressful conditions, which has a disproportionate impact on large individuals. As expected, we found that more disturbed streams had fewer small organisms than pristine forest streams, but, surprisingly, they had shallower size spectrum slopes, which indicates that energy might be transferred more efficiently in disturbed streams. Disturbed streams were also less taxonomically diverse, suggesting that the potentially higher energy transfer in these webs might be channelled via a few efficient trophic links. However, because total biomass was higher in pristine streams, these sites still supported a greater number of larger organisms and longer food chains (i.e. larger size range). Our results indicate that land-use intensification decreases ecosystem stability and enhances vulnerability to population extinctions by reducing the possible energetic pathways while enhancing efficiency between the remaining food-web linkages. Our study represents a step forward in understanding how land-use intensification affects trophic interactions and ecosystem functioning in aquatic systems. |
publishDate |
2023 |
dc.date.none.fl_str_mv |
2023-07-29T13:12:21Z 2023-07-29T13:12:21Z 2023-01-01 |
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/10.1111/gcb.16720 Global Change Biology. 1365-2486 1354-1013 http://hdl.handle.net/11449/247300 10.1111/gcb.16720 2-s2.0-85157967852 |
url |
http://dx.doi.org/10.1111/gcb.16720 http://hdl.handle.net/11449/247300 |
identifier_str_mv |
Global Change Biology. 1365-2486 1354-1013 10.1111/gcb.16720 2-s2.0-85157967852 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Global Change Biology |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.source.none.fl_str_mv |
Scopus 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_ |
1808129002745888768 |