Factors that control the spatial and temporal distributions of phosphorus, nitrogen, and carbon in the sediments of a tropical reservoir
Autor(a) principal: | |
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Data de Publicação: | 2018 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1007/s11356-018-2923-0 http://hdl.handle.net/11449/176840 |
Resumo: | The impacts of anthropic activities have had profound effects on the nitrogen (N) and phosphorus (P) cycles in many aquatic ecosystems. We investigated the spatial and temporal distributions of carbon (C), N, and P in the sediments of a tropical Paiva Castro Reservoir (São Paulo, Brazil), as well as their release and retention in the system. In 2010, surface sediments were collected at nine sites in the reservoir, and a core was obtained in the limnetic zone, in 2010. The core was dated using the 210Pb technique. The organic C content was estimated from organic matter concentration, which was measured by the loss-on-ignition method, and the concentrations of P and N were determined by spectrophotometry. Marked spatial heterogeneity in the Paiva Castro sediments associated with both natural variations in the water body and variations induced by human impacts was observed. Heterogeneity was evidenced by a decrease in the allochthonous contribution of organic matter (C/N) in the upstream-downstream direction and increases of N and P, mainly associated with water flows in the different compartments of the reservoir. In the core, C and N concentrations display significant positive correlations with increases in population and agricultural activities in the drainage basin through time. The C/P molar ratios in surface sediments are indicative of human impacts in the region, as C:P ratios in the sediment are low (7.8:1) compared to the Redfield ratio (C:P = 108:1). Predominance of oxic conditions at the sediment surface and particles sizes < 63 μm provided favorable conditions for P retention in the sediments, which helps prevent eutrophication. Approaches used in this research should be extended to other locations, especially in mesotrophic and oligotrophic reservoirs, to provide information on historical impacts in such aquatic ecosystems. |
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Factors that control the spatial and temporal distributions of phosphorus, nitrogen, and carbon in the sediments of a tropical reservoirAnthropic impactsEutrophicationNitrogenPaleolimnologyPhosphorusReservoirSediment coreThe impacts of anthropic activities have had profound effects on the nitrogen (N) and phosphorus (P) cycles in many aquatic ecosystems. We investigated the spatial and temporal distributions of carbon (C), N, and P in the sediments of a tropical Paiva Castro Reservoir (São Paulo, Brazil), as well as their release and retention in the system. In 2010, surface sediments were collected at nine sites in the reservoir, and a core was obtained in the limnetic zone, in 2010. The core was dated using the 210Pb technique. The organic C content was estimated from organic matter concentration, which was measured by the loss-on-ignition method, and the concentrations of P and N were determined by spectrophotometry. Marked spatial heterogeneity in the Paiva Castro sediments associated with both natural variations in the water body and variations induced by human impacts was observed. Heterogeneity was evidenced by a decrease in the allochthonous contribution of organic matter (C/N) in the upstream-downstream direction and increases of N and P, mainly associated with water flows in the different compartments of the reservoir. In the core, C and N concentrations display significant positive correlations with increases in population and agricultural activities in the drainage basin through time. The C/P molar ratios in surface sediments are indicative of human impacts in the region, as C:P ratios in the sediment are low (7.8:1) compared to the Redfield ratio (C:P = 108:1). Predominance of oxic conditions at the sediment surface and particles sizes < 63 μm provided favorable conditions for P retention in the sediments, which helps prevent eutrophication. Approaches used in this research should be extended to other locations, especially in mesotrophic and oligotrophic reservoirs, to provide information on historical impacts in such aquatic ecosystems.Environmental Sciences Program São Paulo State University – UNESP, Sorocaba campus, Avenida Três de Março 511, Alto da Boa VistaChemistry Department Institute of Oceanography University of São Paulo, Praça do Oceanográico, 191Ecology Department Institute of Biosciences University of São Paulo, R. do Matão, 14 - ButantãEnvironmental Sciences Program São Paulo State University – UNESP, Sorocaba campus, Avenida Três de Março 511, Alto da Boa VistaUniversidade Estadual Paulista (Unesp)Universidade de São Paulo (USP)Cardoso-Silva, Sheila [UNESP]Ferreira, Paulo Alves de LimaFigueira, Rubens César Lopesda Silva, Daniel Clemente Vieira RêgoMoschini-Carlos, Viviane [UNESP]Pompêo, Marcelo L. M.2018-12-11T17:22:42Z2018-12-11T17:22:42Z2018-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://dx.doi.org/10.1007/s11356-018-2923-0Environmental Science and Pollution Research.1614-74990944-1344http://hdl.handle.net/11449/17684010.1007/s11356-018-2923-02-s2.0-850532671242-s2.0-85053267124.pdfScopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengEnvironmental Science and Pollution Research0,858info:eu-repo/semantics/openAccess2023-12-08T06:18:39Zoai:repositorio.unesp.br:11449/176840Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T19:45:36.795798Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Factors that control the spatial and temporal distributions of phosphorus, nitrogen, and carbon in the sediments of a tropical reservoir |
title |
Factors that control the spatial and temporal distributions of phosphorus, nitrogen, and carbon in the sediments of a tropical reservoir |
spellingShingle |
Factors that control the spatial and temporal distributions of phosphorus, nitrogen, and carbon in the sediments of a tropical reservoir Cardoso-Silva, Sheila [UNESP] Anthropic impacts Eutrophication Nitrogen Paleolimnology Phosphorus Reservoir Sediment core |
title_short |
Factors that control the spatial and temporal distributions of phosphorus, nitrogen, and carbon in the sediments of a tropical reservoir |
title_full |
Factors that control the spatial and temporal distributions of phosphorus, nitrogen, and carbon in the sediments of a tropical reservoir |
title_fullStr |
Factors that control the spatial and temporal distributions of phosphorus, nitrogen, and carbon in the sediments of a tropical reservoir |
title_full_unstemmed |
Factors that control the spatial and temporal distributions of phosphorus, nitrogen, and carbon in the sediments of a tropical reservoir |
title_sort |
Factors that control the spatial and temporal distributions of phosphorus, nitrogen, and carbon in the sediments of a tropical reservoir |
author |
Cardoso-Silva, Sheila [UNESP] |
author_facet |
Cardoso-Silva, Sheila [UNESP] Ferreira, Paulo Alves de Lima Figueira, Rubens César Lopes da Silva, Daniel Clemente Vieira Rêgo Moschini-Carlos, Viviane [UNESP] Pompêo, Marcelo L. M. |
author_role |
author |
author2 |
Ferreira, Paulo Alves de Lima Figueira, Rubens César Lopes da Silva, Daniel Clemente Vieira Rêgo Moschini-Carlos, Viviane [UNESP] Pompêo, Marcelo L. M. |
author2_role |
author author author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) Universidade de São Paulo (USP) |
dc.contributor.author.fl_str_mv |
Cardoso-Silva, Sheila [UNESP] Ferreira, Paulo Alves de Lima Figueira, Rubens César Lopes da Silva, Daniel Clemente Vieira Rêgo Moschini-Carlos, Viviane [UNESP] Pompêo, Marcelo L. M. |
dc.subject.por.fl_str_mv |
Anthropic impacts Eutrophication Nitrogen Paleolimnology Phosphorus Reservoir Sediment core |
topic |
Anthropic impacts Eutrophication Nitrogen Paleolimnology Phosphorus Reservoir Sediment core |
description |
The impacts of anthropic activities have had profound effects on the nitrogen (N) and phosphorus (P) cycles in many aquatic ecosystems. We investigated the spatial and temporal distributions of carbon (C), N, and P in the sediments of a tropical Paiva Castro Reservoir (São Paulo, Brazil), as well as their release and retention in the system. In 2010, surface sediments were collected at nine sites in the reservoir, and a core was obtained in the limnetic zone, in 2010. The core was dated using the 210Pb technique. The organic C content was estimated from organic matter concentration, which was measured by the loss-on-ignition method, and the concentrations of P and N were determined by spectrophotometry. Marked spatial heterogeneity in the Paiva Castro sediments associated with both natural variations in the water body and variations induced by human impacts was observed. Heterogeneity was evidenced by a decrease in the allochthonous contribution of organic matter (C/N) in the upstream-downstream direction and increases of N and P, mainly associated with water flows in the different compartments of the reservoir. In the core, C and N concentrations display significant positive correlations with increases in population and agricultural activities in the drainage basin through time. The C/P molar ratios in surface sediments are indicative of human impacts in the region, as C:P ratios in the sediment are low (7.8:1) compared to the Redfield ratio (C:P = 108:1). Predominance of oxic conditions at the sediment surface and particles sizes < 63 μm provided favorable conditions for P retention in the sediments, which helps prevent eutrophication. Approaches used in this research should be extended to other locations, especially in mesotrophic and oligotrophic reservoirs, to provide information on historical impacts in such aquatic ecosystems. |
publishDate |
2018 |
dc.date.none.fl_str_mv |
2018-12-11T17:22:42Z 2018-12-11T17:22:42Z 2018-01-01 |
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/10.1007/s11356-018-2923-0 Environmental Science and Pollution Research. 1614-7499 0944-1344 http://hdl.handle.net/11449/176840 10.1007/s11356-018-2923-0 2-s2.0-85053267124 2-s2.0-85053267124.pdf |
url |
http://dx.doi.org/10.1007/s11356-018-2923-0 http://hdl.handle.net/11449/176840 |
identifier_str_mv |
Environmental Science and Pollution Research. 1614-7499 0944-1344 10.1007/s11356-018-2923-0 2-s2.0-85053267124 2-s2.0-85053267124.pdf |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Environmental Science and Pollution Research 0,858 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
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 |
|
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1808129114921500672 |