Influence of environmental variables on stream fish fauna at multiple spatial scales
Autor(a) principal: | |
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Data de Publicação: | 2016 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFLA |
Texto Completo: | http://repositorio.ufla.br/jspui/handle/1/31773 |
Resumo: | Effects of environmental variables at different spatial scales on freshwater fish assemblages are relatively unexplored in Neotropical ecosystems. However, those influences are important for developing management strategies to conserve fish diversity and water resources. We evaluated the influences of site- (in-stream) and catchment-scale (land use and cover) environmental variables on the abundance and occurrence of fish species in streams of the Upper Araguari River basin through use of variance partitioning with partial CCA. We sampled 38 1st to 3rd order stream sites in September 2009. We quantified site variables to calculate 11 physical habitat metrics and mapped catchment land use/cover. Site and catchment variables explained > 50% of the total variation in fish species. Site variables (fish abundance: 25.31%; occurrence: 24.51%) explained slightly more variation in fish species than catchment land use/cover (abundance: 22.69%; occurrence: 18.90%), indicating that factors at both scales are important. Because anthropogenic pressures at site and catchment scales both affect stream fish in the Upper Araguari River basin, both must be considered jointly to apply conservation strategies in an efficient manner. |
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Influence of environmental variables on stream fish fauna at multiple spatial scalesDisturbed sitesFish assemblagesLand usePartial CCAPhysical habitatPartial canonical correlation analysis (Partial CCA)Effects of environmental variables at different spatial scales on freshwater fish assemblages are relatively unexplored in Neotropical ecosystems. However, those influences are important for developing management strategies to conserve fish diversity and water resources. We evaluated the influences of site- (in-stream) and catchment-scale (land use and cover) environmental variables on the abundance and occurrence of fish species in streams of the Upper Araguari River basin through use of variance partitioning with partial CCA. We sampled 38 1st to 3rd order stream sites in September 2009. We quantified site variables to calculate 11 physical habitat metrics and mapped catchment land use/cover. Site and catchment variables explained > 50% of the total variation in fish species. Site variables (fish abundance: 25.31%; occurrence: 24.51%) explained slightly more variation in fish species than catchment land use/cover (abundance: 22.69%; occurrence: 18.90%), indicating that factors at both scales are important. Because anthropogenic pressures at site and catchment scales both affect stream fish in the Upper Araguari River basin, both must be considered jointly to apply conservation strategies in an efficient manner.Os efeitos das variáveis ambientais em diferentes escalas espaciais sobre as assembleias de peixes de água doce ainda é um tema pouco explorado na região Neotropical. Entretanto é um assunto de extrema relevância, pois gera subsídios para definições de estratégias de manejo e conservação de ictiofauna e dos recursos hídricos. Nós avaliamos a influência de variáveis ambientais em escalas local (dentro do rio) e da paisagem (uso e cobertura do solo) na abundância e ocorrência das espécies de peixes de riachos da bacia do alto rio Araguari através da partição da variância usando CCA parcial. Um total de 38 riachos de até 3ª ordem foi amostrado em setembro de 2009. Nós quantificamos variáveis locais para calcular 11 métricas de hábitats físicos e mapeamos o uso e cobertura do solo. O conjunto de dados (variáveis locais e da paisagem) explicou mais de 50% da variação total nas espécies de peixes. Variáveis em escala local (abundância: 25,31%; ocorrência: 24,51%) explicaram levemente uma maior variação nas assembleias de peixes do que o uso e cobertura do solo (abundância: 22,69%; ocorrência: 18,90%), indicando que os fatores em ambas as escalas de estudo são importantes. Uma vez que a influência antrópica em diferentes escalas afeta as espécies de peixes em riachos da bacia do alto rio Araguari, ambas devem ser consideradas juntamente para a adoção de estratégias de conservação de uma forma racional.Universidade Estadual de Maringá (UEM)2018-11-17T10:33:42Z2018-11-17T10:33:42Z2016-09-15info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfJUNQUEIRA, N. T. et al. Influence of environmental variables on stream fish fauna at multiple spatial scales. Neotropical Ichthyology, Maringá, v. 14, n. 3, 2016.http://repositorio.ufla.br/jspui/handle/1/31773Neotropical Ichthyologyreponame:Repositório Institucional da UFLAinstname:Universidade Federal de Lavras (UFLA)instacron:UFLAhttp://creativecommons.org/licenses/by/4.0/info:eu-repo/semantics/openAccessJunqueira, Nara TadiniMacedo, Diego RodriguesSouza, Rafael Couto Rosa deHughes, Robert MasonCallisto, MarcosPompeu, Paulo Santoseng2023-05-30T17:25:11Zoai:localhost:1/31773Repositório InstitucionalPUBhttp://repositorio.ufla.br/oai/requestnivaldo@ufla.br || repositorio.biblioteca@ufla.bropendoar:2023-05-30T17:25:11Repositório Institucional da UFLA - Universidade Federal de Lavras (UFLA)false |
dc.title.none.fl_str_mv |
Influence of environmental variables on stream fish fauna at multiple spatial scales |
title |
Influence of environmental variables on stream fish fauna at multiple spatial scales |
spellingShingle |
Influence of environmental variables on stream fish fauna at multiple spatial scales Junqueira, Nara Tadini Disturbed sites Fish assemblages Land use Partial CCA Physical habitat Partial canonical correlation analysis (Partial CCA) |
title_short |
Influence of environmental variables on stream fish fauna at multiple spatial scales |
title_full |
Influence of environmental variables on stream fish fauna at multiple spatial scales |
title_fullStr |
Influence of environmental variables on stream fish fauna at multiple spatial scales |
title_full_unstemmed |
Influence of environmental variables on stream fish fauna at multiple spatial scales |
title_sort |
Influence of environmental variables on stream fish fauna at multiple spatial scales |
author |
Junqueira, Nara Tadini |
author_facet |
Junqueira, Nara Tadini Macedo, Diego Rodrigues Souza, Rafael Couto Rosa de Hughes, Robert Mason Callisto, Marcos Pompeu, Paulo Santos |
author_role |
author |
author2 |
Macedo, Diego Rodrigues Souza, Rafael Couto Rosa de Hughes, Robert Mason Callisto, Marcos Pompeu, Paulo Santos |
author2_role |
author author author author author |
dc.contributor.author.fl_str_mv |
Junqueira, Nara Tadini Macedo, Diego Rodrigues Souza, Rafael Couto Rosa de Hughes, Robert Mason Callisto, Marcos Pompeu, Paulo Santos |
dc.subject.por.fl_str_mv |
Disturbed sites Fish assemblages Land use Partial CCA Physical habitat Partial canonical correlation analysis (Partial CCA) |
topic |
Disturbed sites Fish assemblages Land use Partial CCA Physical habitat Partial canonical correlation analysis (Partial CCA) |
description |
Effects of environmental variables at different spatial scales on freshwater fish assemblages are relatively unexplored in Neotropical ecosystems. However, those influences are important for developing management strategies to conserve fish diversity and water resources. We evaluated the influences of site- (in-stream) and catchment-scale (land use and cover) environmental variables on the abundance and occurrence of fish species in streams of the Upper Araguari River basin through use of variance partitioning with partial CCA. We sampled 38 1st to 3rd order stream sites in September 2009. We quantified site variables to calculate 11 physical habitat metrics and mapped catchment land use/cover. Site and catchment variables explained > 50% of the total variation in fish species. Site variables (fish abundance: 25.31%; occurrence: 24.51%) explained slightly more variation in fish species than catchment land use/cover (abundance: 22.69%; occurrence: 18.90%), indicating that factors at both scales are important. Because anthropogenic pressures at site and catchment scales both affect stream fish in the Upper Araguari River basin, both must be considered jointly to apply conservation strategies in an efficient manner. |
publishDate |
2016 |
dc.date.none.fl_str_mv |
2016-09-15 2018-11-17T10:33:42Z 2018-11-17T10:33:42Z |
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 |
JUNQUEIRA, N. T. et al. Influence of environmental variables on stream fish fauna at multiple spatial scales. Neotropical Ichthyology, Maringá, v. 14, n. 3, 2016. http://repositorio.ufla.br/jspui/handle/1/31773 |
identifier_str_mv |
JUNQUEIRA, N. T. et al. Influence of environmental variables on stream fish fauna at multiple spatial scales. Neotropical Ichthyology, Maringá, v. 14, n. 3, 2016. |
url |
http://repositorio.ufla.br/jspui/handle/1/31773 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.rights.driver.fl_str_mv |
http://creativecommons.org/licenses/by/4.0/ info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
http://creativecommons.org/licenses/by/4.0/ |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Universidade Estadual de Maringá (UEM) |
publisher.none.fl_str_mv |
Universidade Estadual de Maringá (UEM) |
dc.source.none.fl_str_mv |
Neotropical Ichthyology reponame:Repositório Institucional da UFLA instname:Universidade Federal de Lavras (UFLA) instacron:UFLA |
instname_str |
Universidade Federal de Lavras (UFLA) |
instacron_str |
UFLA |
institution |
UFLA |
reponame_str |
Repositório Institucional da UFLA |
collection |
Repositório Institucional da UFLA |
repository.name.fl_str_mv |
Repositório Institucional da UFLA - Universidade Federal de Lavras (UFLA) |
repository.mail.fl_str_mv |
nivaldo@ufla.br || repositorio.biblioteca@ufla.br |
_version_ |
1807835184238690304 |