Relative influence of direct and indirect environmental effects on sestonic chlorophyll-a concentration in Cerrado streams
Autor(a) principal: | |
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Data de Publicação: | 2015 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Acta Limnologica Brasiliensia (Online) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S2179-975X2015000300301 |
Resumo: | Abstract Aim: Chlorophyll-a may be directly influenced by local variables and/or indirectly by land use and cover, once landscape modifications change limnological variables, which in turn affect the primary productivity of aquatic environments, e.g., streams. Therefore, the objective of this study was to determine the relative importance of the local and landscape environmental components and assess the direct and indirect effects of these variables on sestonic chlorophyll-a concentration in 30 Cerrado streams (Santa Teresa River basin). Results All aquatic environments were oligotrophic during the study period. Only the local variables were important to explain chlorophyll-a variation (R2 = 0.27; P = 0.04). In addition, the path analysis showed that all variables used in the analysis influenced chlorophyll-a concentration more directly than indirectly. Conductivity was the most important variable to directly influence chlorophyll-a, followed by turbidity. Conclusion The large amount of remnant native vegetation in the basin indicates that the region studied is well preserved, which may explain the greater importance of local variables and the low effect of the landscape in explaining chlorophyll-a variation. |
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Acta Limnologica Brasiliensia (Online) |
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Relative influence of direct and indirect environmental effects on sestonic chlorophyll-a concentration in Cerrado streamsphytoplanktonconductivityvariation partitioninglandscape ecologystream ecology Abstract Aim: Chlorophyll-a may be directly influenced by local variables and/or indirectly by land use and cover, once landscape modifications change limnological variables, which in turn affect the primary productivity of aquatic environments, e.g., streams. Therefore, the objective of this study was to determine the relative importance of the local and landscape environmental components and assess the direct and indirect effects of these variables on sestonic chlorophyll-a concentration in 30 Cerrado streams (Santa Teresa River basin). Results All aquatic environments were oligotrophic during the study period. Only the local variables were important to explain chlorophyll-a variation (R2 = 0.27; P = 0.04). In addition, the path analysis showed that all variables used in the analysis influenced chlorophyll-a concentration more directly than indirectly. Conductivity was the most important variable to directly influence chlorophyll-a, followed by turbidity. Conclusion The large amount of remnant native vegetation in the basin indicates that the region studied is well preserved, which may explain the greater importance of local variables and the low effect of the landscape in explaining chlorophyll-a variation.Associação Brasileira de Limnologia2015-09-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S2179-975X2015000300301Acta Limnologica Brasiliensia v.27 n.3 2015reponame:Acta Limnologica Brasiliensia (Online)instname:Associação Brasileira de Limnologia (ABL)instacron:ABL10.1590/S2179-975X1815info:eu-repo/semantics/openAccessBorges,Pedro PaulinoTeresa,Fabrício BarretoMartins,Patrick Thomaz de AquinoNabout,João Carloseng2015-12-08T00:00:00Zoai:scielo:S2179-975X2015000300301Revistahttp://www.ablimno.org.br/publiActa.phphttps://old.scielo.br/oai/scielo-oai.php||actalb@rc.unesp.br2179-975X0102-6712opendoar:2015-12-08T00:00Acta Limnologica Brasiliensia (Online) - Associação Brasileira de Limnologia (ABL)false |
dc.title.none.fl_str_mv |
Relative influence of direct and indirect environmental effects on sestonic chlorophyll-a concentration in Cerrado streams |
title |
Relative influence of direct and indirect environmental effects on sestonic chlorophyll-a concentration in Cerrado streams |
spellingShingle |
Relative influence of direct and indirect environmental effects on sestonic chlorophyll-a concentration in Cerrado streams Borges,Pedro Paulino phytoplankton conductivity variation partitioning landscape ecology stream ecology |
title_short |
Relative influence of direct and indirect environmental effects on sestonic chlorophyll-a concentration in Cerrado streams |
title_full |
Relative influence of direct and indirect environmental effects on sestonic chlorophyll-a concentration in Cerrado streams |
title_fullStr |
Relative influence of direct and indirect environmental effects on sestonic chlorophyll-a concentration in Cerrado streams |
title_full_unstemmed |
Relative influence of direct and indirect environmental effects on sestonic chlorophyll-a concentration in Cerrado streams |
title_sort |
Relative influence of direct and indirect environmental effects on sestonic chlorophyll-a concentration in Cerrado streams |
author |
Borges,Pedro Paulino |
author_facet |
Borges,Pedro Paulino Teresa,Fabrício Barreto Martins,Patrick Thomaz de Aquino Nabout,João Carlos |
author_role |
author |
author2 |
Teresa,Fabrício Barreto Martins,Patrick Thomaz de Aquino Nabout,João Carlos |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
Borges,Pedro Paulino Teresa,Fabrício Barreto Martins,Patrick Thomaz de Aquino Nabout,João Carlos |
dc.subject.por.fl_str_mv |
phytoplankton conductivity variation partitioning landscape ecology stream ecology |
topic |
phytoplankton conductivity variation partitioning landscape ecology stream ecology |
description |
Abstract Aim: Chlorophyll-a may be directly influenced by local variables and/or indirectly by land use and cover, once landscape modifications change limnological variables, which in turn affect the primary productivity of aquatic environments, e.g., streams. Therefore, the objective of this study was to determine the relative importance of the local and landscape environmental components and assess the direct and indirect effects of these variables on sestonic chlorophyll-a concentration in 30 Cerrado streams (Santa Teresa River basin). Results All aquatic environments were oligotrophic during the study period. Only the local variables were important to explain chlorophyll-a variation (R2 = 0.27; P = 0.04). In addition, the path analysis showed that all variables used in the analysis influenced chlorophyll-a concentration more directly than indirectly. Conductivity was the most important variable to directly influence chlorophyll-a, followed by turbidity. Conclusion The large amount of remnant native vegetation in the basin indicates that the region studied is well preserved, which may explain the greater importance of local variables and the low effect of the landscape in explaining chlorophyll-a variation. |
publishDate |
2015 |
dc.date.none.fl_str_mv |
2015-09-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S2179-975X2015000300301 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S2179-975X2015000300301 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/S2179-975X1815 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
Associação Brasileira de Limnologia |
publisher.none.fl_str_mv |
Associação Brasileira de Limnologia |
dc.source.none.fl_str_mv |
Acta Limnologica Brasiliensia v.27 n.3 2015 reponame:Acta Limnologica Brasiliensia (Online) instname:Associação Brasileira de Limnologia (ABL) instacron:ABL |
instname_str |
Associação Brasileira de Limnologia (ABL) |
instacron_str |
ABL |
institution |
ABL |
reponame_str |
Acta Limnologica Brasiliensia (Online) |
collection |
Acta Limnologica Brasiliensia (Online) |
repository.name.fl_str_mv |
Acta Limnologica Brasiliensia (Online) - Associação Brasileira de Limnologia (ABL) |
repository.mail.fl_str_mv |
||actalb@rc.unesp.br |
_version_ |
1754212636818407424 |