Environmental and spatial effects on coastal stream fishes in the Atlantic rain forest
Autor(a) principal: | |
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Data de Publicação: | 2019 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1111/btp.12746 http://hdl.handle.net/11449/196451 |
Resumo: | Contemporary and historical factors influence assemblage structure. The environmental and spatial influences acting on fish organization of rain forest coastal streams in the Atlantic rain forest of Brazil were examined. Fish (and functional traits such as morphology, diet, velocity preference, body size), environmental variables (pH, water conductivity, dissolved oxygen, temperature, stream width, flow, depth, substrate), and altitude were measured from 59 stream reaches. Asymmetric eigenvector maps were used to model the spatial structure considering direction of fish movements. Elevation played an important role-fish abundance, biomass, and richness all decrease with increasing elevation. Fish communities are influenced by both environmental and spatial factors, but downstream movements were shown to be more important in explaining the observed spatial variation than were bidirectional and upstream movements. Spatial factors, as well as environmental variables influenced by the spatial structure, explained most of the variation in fish assemblages. The strong spatial structuring is probably attributable to asymmetric dispersal limitation along the altitudinal profile: Dispersal is likely to be more limiting moving upstream than downstream. These fish assemblages reflect scale-dependent processes: At the stream-reach scale, fish respond to local environmental filters (habitat structure, water chemistry, and food supply), which are in turn influenced by a larger scale, namely the altitudinal gradient expected in steep coastal mountains. Thus, environmental drivers are not independent of spatial factors, and the effects of local factors can be confounded across the altitudinal gradient. These results may have implications for conservation, because downstream reaches are often neglected in management and conservation plans. in Portuguese is available with online material. |
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Environmental and spatial effects on coastal stream fishes in the Atlantic rain forestaltitudeasymmetric eigenvector mapsdispersal limitationenvironmental filteringfish metacommunitiesfish movementtropical streams conservationvariation partitioningContemporary and historical factors influence assemblage structure. The environmental and spatial influences acting on fish organization of rain forest coastal streams in the Atlantic rain forest of Brazil were examined. Fish (and functional traits such as morphology, diet, velocity preference, body size), environmental variables (pH, water conductivity, dissolved oxygen, temperature, stream width, flow, depth, substrate), and altitude were measured from 59 stream reaches. Asymmetric eigenvector maps were used to model the spatial structure considering direction of fish movements. Elevation played an important role-fish abundance, biomass, and richness all decrease with increasing elevation. Fish communities are influenced by both environmental and spatial factors, but downstream movements were shown to be more important in explaining the observed spatial variation than were bidirectional and upstream movements. Spatial factors, as well as environmental variables influenced by the spatial structure, explained most of the variation in fish assemblages. The strong spatial structuring is probably attributable to asymmetric dispersal limitation along the altitudinal profile: Dispersal is likely to be more limiting moving upstream than downstream. These fish assemblages reflect scale-dependent processes: At the stream-reach scale, fish respond to local environmental filters (habitat structure, water chemistry, and food supply), which are in turn influenced by a larger scale, namely the altitudinal gradient expected in steep coastal mountains. Thus, environmental drivers are not independent of spatial factors, and the effects of local factors can be confounded across the altitudinal gradient. These results may have implications for conservation, because downstream reaches are often neglected in management and conservation plans. in Portuguese is available with online material.Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)University of Florida FoundationCOTECIBAMA/ICMBioUniv Estadual Paulista, Dept Zool & Bot, Lab Ictiol, Sao Jose Do Rio Preto, SP, BrazilUniv Florida, Dept Biol, Arthur R Marshall Jr Ecol Sci Lab, Gainesville, FL USAUniv Estadual Paulista, Dept Zool & Bot, Lab Ictiol, Sao Jose Do Rio Preto, SP, BrazilCNPq: 301755/2013-2FAPESP: 2012/19723-0FAPESP: 2013/20794-1FAPESP: 2008/55029-5COTEC: 260108-015.708/2012COTEC: 260108000.197/2008IBAMA/ICMBio: 37489-1/2IBAMA/ICMBio: 15744Wiley-BlackwellUniversidade Estadual Paulista (Unesp)Univ FloridaGoncalves, Cristina da Silva [UNESP]Holt, Robert DanChristman, Mary C.Casatti, Lilian [UNESP]2020-12-10T19:45:25Z2020-12-10T19:45:25Z2019-12-31info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article139-150http://dx.doi.org/10.1111/btp.12746Biotropica. Hoboken: Wiley, v. 52, n. 1, p. 139-150, 2020.0006-3606http://hdl.handle.net/11449/19645110.1111/btp.12746WOS:000504902100001Web of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengBiotropicainfo:eu-repo/semantics/openAccess2021-10-23T04:53:26Zoai:repositorio.unesp.br:11449/196451Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T21:00:01.596620Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Environmental and spatial effects on coastal stream fishes in the Atlantic rain forest |
title |
Environmental and spatial effects on coastal stream fishes in the Atlantic rain forest |
spellingShingle |
Environmental and spatial effects on coastal stream fishes in the Atlantic rain forest Goncalves, Cristina da Silva [UNESP] altitude asymmetric eigenvector maps dispersal limitation environmental filtering fish metacommunities fish movement tropical streams conservation variation partitioning |
title_short |
Environmental and spatial effects on coastal stream fishes in the Atlantic rain forest |
title_full |
Environmental and spatial effects on coastal stream fishes in the Atlantic rain forest |
title_fullStr |
Environmental and spatial effects on coastal stream fishes in the Atlantic rain forest |
title_full_unstemmed |
Environmental and spatial effects on coastal stream fishes in the Atlantic rain forest |
title_sort |
Environmental and spatial effects on coastal stream fishes in the Atlantic rain forest |
author |
Goncalves, Cristina da Silva [UNESP] |
author_facet |
Goncalves, Cristina da Silva [UNESP] Holt, Robert Dan Christman, Mary C. Casatti, Lilian [UNESP] |
author_role |
author |
author2 |
Holt, Robert Dan Christman, Mary C. Casatti, Lilian [UNESP] |
author2_role |
author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) Univ Florida |
dc.contributor.author.fl_str_mv |
Goncalves, Cristina da Silva [UNESP] Holt, Robert Dan Christman, Mary C. Casatti, Lilian [UNESP] |
dc.subject.por.fl_str_mv |
altitude asymmetric eigenvector maps dispersal limitation environmental filtering fish metacommunities fish movement tropical streams conservation variation partitioning |
topic |
altitude asymmetric eigenvector maps dispersal limitation environmental filtering fish metacommunities fish movement tropical streams conservation variation partitioning |
description |
Contemporary and historical factors influence assemblage structure. The environmental and spatial influences acting on fish organization of rain forest coastal streams in the Atlantic rain forest of Brazil were examined. Fish (and functional traits such as morphology, diet, velocity preference, body size), environmental variables (pH, water conductivity, dissolved oxygen, temperature, stream width, flow, depth, substrate), and altitude were measured from 59 stream reaches. Asymmetric eigenvector maps were used to model the spatial structure considering direction of fish movements. Elevation played an important role-fish abundance, biomass, and richness all decrease with increasing elevation. Fish communities are influenced by both environmental and spatial factors, but downstream movements were shown to be more important in explaining the observed spatial variation than were bidirectional and upstream movements. Spatial factors, as well as environmental variables influenced by the spatial structure, explained most of the variation in fish assemblages. The strong spatial structuring is probably attributable to asymmetric dispersal limitation along the altitudinal profile: Dispersal is likely to be more limiting moving upstream than downstream. These fish assemblages reflect scale-dependent processes: At the stream-reach scale, fish respond to local environmental filters (habitat structure, water chemistry, and food supply), which are in turn influenced by a larger scale, namely the altitudinal gradient expected in steep coastal mountains. Thus, environmental drivers are not independent of spatial factors, and the effects of local factors can be confounded across the altitudinal gradient. These results may have implications for conservation, because downstream reaches are often neglected in management and conservation plans. in Portuguese is available with online material. |
publishDate |
2019 |
dc.date.none.fl_str_mv |
2019-12-31 2020-12-10T19:45:25Z 2020-12-10T19:45:25Z |
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/btp.12746 Biotropica. Hoboken: Wiley, v. 52, n. 1, p. 139-150, 2020. 0006-3606 http://hdl.handle.net/11449/196451 10.1111/btp.12746 WOS:000504902100001 |
url |
http://dx.doi.org/10.1111/btp.12746 http://hdl.handle.net/11449/196451 |
identifier_str_mv |
Biotropica. Hoboken: Wiley, v. 52, n. 1, p. 139-150, 2020. 0006-3606 10.1111/btp.12746 WOS:000504902100001 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Biotropica |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
139-150 |
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_ |
1808129271769595904 |