Anthropogenic influences in a lagoonal environment: a multiproxy approach at the valo grande mouth, Cananéia-Iguape system (SE Brazil)
The Cananéia-Iguape system, SE Brazil, consists of a complex of lagoonal channels, located in a United Nations Educational, Scientific and Cultural Organization (UNESCO) Biosphere Reserve. Nevertheless, important environmental changes have occurred in approximately the last 150 yrs due to the openin...
| Main Authors: | , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Universidade de São Paulo
2009-12-01
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| Series: | Brazilian Journal of Oceanography |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-87592009000400007 |
| _version_ | 1811250252470026240 |
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| author | Michel Michaelovitch de Mahiques Leticia Burone Rubens Cesar Lopes Figueira Ana Amélia de Oliveira Lavenére-Wanderley Benjamim Capellari Carlos Eduardo Rogacheski Cassia Pianca Barroso Leonardo Augusto Samaritano dos Santos Luisa Mariutti Cordero Mariana Coppede Cussioli |
| author_facet | Michel Michaelovitch de Mahiques Leticia Burone Rubens Cesar Lopes Figueira Ana Amélia de Oliveira Lavenére-Wanderley Benjamim Capellari Carlos Eduardo Rogacheski Cassia Pianca Barroso Leonardo Augusto Samaritano dos Santos Luisa Mariutti Cordero Mariana Coppede Cussioli |
| author_sort | Michel Michaelovitch de Mahiques |
| collection | DOAJ |
| description | The Cananéia-Iguape system, SE Brazil, consists of a complex of lagoonal channels, located in a United Nations Educational, Scientific and Cultural Organization (UNESCO) Biosphere Reserve. Nevertheless, important environmental changes have occurred in approximately the last 150 yrs due to the opening of an artificial channel, the Valo Grande, connecting the Ribeira de Iguape River to the lagoonal system. Our objective is to assess the historical record of the uppermost layers of the sedimentary column of the lagoonal system in order to determine the history of environmental changes caused by the opening of the artificial channel. In this sense, an integrated geochemical-faunal approach is used. The environmental changes led significant modifications in salinity, in changes of the depositional patterns of sediments and foraminiferal assemblages (including periods of defaunation), and, more drastically, in the input of heavy metals to the coastal environment. The concentrations Pb in the core analyzed here were up to two times higher than the values measured in contaminated sediments from the Santos estuary, the most industrialized coastal zone in Brazil.<br>O sistema Cananéia-Iguape (Sudeste do Brasil), consiste em um complexo de canais lagunares localizados no interior de uma Reserva da Biosfera (assim definida pela UNESCO). Não obstante, variações ambientais importantes ocorreram nos últimos 150 anos, devido à abertura de um canal artificial, o Valo Grande, conectando o Rio Ribeira de Iguape ao sistema lagunar. O objetivo deste trabalho foi determinar a história das variações ambientais no sistema lagunar, causadas pela abertura do canal artificial, através da análise das camadas superiores da coluna sedimentar de um testemunho coletado no sistema. Neste sentido, uma abordagem integrada, envolvendo variações geoquímicas e faunísticas foi utilizada. As variações ambientais ocorridas apontam para mudanças drásticas na salinidade, nos padrões de sedimentação, nas associações de foraminíferos (incluindo períodos azóicos) e, mais drasticamente, no aporte de metais para o sistema costeiro. As concentrações de Pb no testemunho coletado indicam valores duas vezes maiores do que os medidos em sedimentos contaminados do estuário de Santos, situado na zona costeira mais industrializada do Brasil. |
| first_indexed | 2024-04-12T16:01:54Z |
| format | Article |
| id | doaj.art-c414a5833fce47ac90e32b795abced71 |
| institution | Directory Open Access Journal |
| issn | 1679-8759 1982-436X |
| language | English |
| last_indexed | 2024-04-12T16:01:54Z |
| publishDate | 2009-12-01 |
| publisher | Universidade de São Paulo |
| record_format | Article |
| series | Brazilian Journal of Oceanography |
| spelling | doaj.art-c414a5833fce47ac90e32b795abced712022-12-22T03:26:11ZengUniversidade de São PauloBrazilian Journal of Oceanography1679-87591982-436X2009-12-0157432533710.1590/S1679-87592009000400007Anthropogenic influences in a lagoonal environment: a multiproxy approach at the valo grande mouth, Cananéia-Iguape system (SE Brazil)Michel Michaelovitch de MahiquesLeticia BuroneRubens Cesar Lopes FigueiraAna Amélia de Oliveira Lavenére-WanderleyBenjamim CapellariCarlos Eduardo RogacheskiCassia Pianca BarrosoLeonardo Augusto Samaritano dos SantosLuisa Mariutti CorderoMariana Coppede CussioliThe Cananéia-Iguape system, SE Brazil, consists of a complex of lagoonal channels, located in a United Nations Educational, Scientific and Cultural Organization (UNESCO) Biosphere Reserve. Nevertheless, important environmental changes have occurred in approximately the last 150 yrs due to the opening of an artificial channel, the Valo Grande, connecting the Ribeira de Iguape River to the lagoonal system. Our objective is to assess the historical record of the uppermost layers of the sedimentary column of the lagoonal system in order to determine the history of environmental changes caused by the opening of the artificial channel. In this sense, an integrated geochemical-faunal approach is used. The environmental changes led significant modifications in salinity, in changes of the depositional patterns of sediments and foraminiferal assemblages (including periods of defaunation), and, more drastically, in the input of heavy metals to the coastal environment. The concentrations Pb in the core analyzed here were up to two times higher than the values measured in contaminated sediments from the Santos estuary, the most industrialized coastal zone in Brazil.<br>O sistema Cananéia-Iguape (Sudeste do Brasil), consiste em um complexo de canais lagunares localizados no interior de uma Reserva da Biosfera (assim definida pela UNESCO). Não obstante, variações ambientais importantes ocorreram nos últimos 150 anos, devido à abertura de um canal artificial, o Valo Grande, conectando o Rio Ribeira de Iguape ao sistema lagunar. O objetivo deste trabalho foi determinar a história das variações ambientais no sistema lagunar, causadas pela abertura do canal artificial, através da análise das camadas superiores da coluna sedimentar de um testemunho coletado no sistema. Neste sentido, uma abordagem integrada, envolvendo variações geoquímicas e faunísticas foi utilizada. As variações ambientais ocorridas apontam para mudanças drásticas na salinidade, nos padrões de sedimentação, nas associações de foraminíferos (incluindo períodos azóicos) e, mais drasticamente, no aporte de metais para o sistema costeiro. As concentrações de Pb no testemunho coletado indicam valores duas vezes maiores do que os medidos em sedimentos contaminados do estuário de Santos, situado na zona costeira mais industrializada do Brasil.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-87592009000400007Influência antrópicaLagunaSedimentaçãoSE BrasilAnthropogenic influenceLagoonSedimentationSE Brazil |
| spellingShingle | Michel Michaelovitch de Mahiques Leticia Burone Rubens Cesar Lopes Figueira Ana Amélia de Oliveira Lavenére-Wanderley Benjamim Capellari Carlos Eduardo Rogacheski Cassia Pianca Barroso Leonardo Augusto Samaritano dos Santos Luisa Mariutti Cordero Mariana Coppede Cussioli Anthropogenic influences in a lagoonal environment: a multiproxy approach at the valo grande mouth, Cananéia-Iguape system (SE Brazil) Brazilian Journal of Oceanography Influência antrópica Laguna Sedimentação SE Brasil Anthropogenic influence Lagoon Sedimentation SE Brazil |
| title | Anthropogenic influences in a lagoonal environment: a multiproxy approach at the valo grande mouth, Cananéia-Iguape system (SE Brazil) |
| title_full | Anthropogenic influences in a lagoonal environment: a multiproxy approach at the valo grande mouth, Cananéia-Iguape system (SE Brazil) |
| title_fullStr | Anthropogenic influences in a lagoonal environment: a multiproxy approach at the valo grande mouth, Cananéia-Iguape system (SE Brazil) |
| title_full_unstemmed | Anthropogenic influences in a lagoonal environment: a multiproxy approach at the valo grande mouth, Cananéia-Iguape system (SE Brazil) |
| title_short | Anthropogenic influences in a lagoonal environment: a multiproxy approach at the valo grande mouth, Cananéia-Iguape system (SE Brazil) |
| title_sort | anthropogenic influences in a lagoonal environment a multiproxy approach at the valo grande mouth cananeia iguape system se brazil |
| topic | Influência antrópica Laguna Sedimentação SE Brasil Anthropogenic influence Lagoon Sedimentation SE Brazil |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-87592009000400007 |
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