Major element concentrations in Mangrove Pore Water, Sepetiba Bay, Brazil
Concentrations of cations and anions of major elements (Na+, Ca2+, Mg2+, K+, Cl-, SO4 2-) were analyzed in the pore water of a mangrove habitat. Site specific major element concentrations were identified along a four piezometric well transect, which were placed in distinct geobotanic facies. Evapotr...
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| Format: | Article |
| Language: | English |
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Universidade de São Paulo
2012-03-01
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| Series: | Brazilian Journal of Oceanography |
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| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-87592012000100004 |
| _version_ | 1811285207151542272 |
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| author | Christian J. Sanders Renato G. S. Barcellos Emmanoel V. Silva-Filho |
| author_facet | Christian J. Sanders Renato G. S. Barcellos Emmanoel V. Silva-Filho |
| author_sort | Christian J. Sanders |
| collection | DOAJ |
| description | Concentrations of cations and anions of major elements (Na+, Ca2+, Mg2+, K+, Cl-, SO4 2-) were analyzed in the pore water of a mangrove habitat. Site specific major element concentrations were identified along a four piezometric well transect, which were placed in distinct geobotanic facies. Evapotranspiration was evident in the apicum station, given the high salinity and major element concentrations. The station landward of an apicum was where major element/Cl- ratios standard deviations are greatest, suggesting intense in situ diagenesis. Molar ratios in the most continental station (4) are significantly lower than the nearby freshwater source, indicating a strong influence of sea water flux into the outer reaches of the mangrove ecosystem and encroaching on the Atlantic rain forest. Indeed, the SO4 2-/Cl- and Ca2+/Cl- ratios suggest limited SO4 2- reduction and relatively high Ca2+/Cl- ratios indicate a region of recent saltwater contact.<br>As concentrações dos elementos maiores (Na+, Ca2+, Mg2+, K+, Cl-, SO4(2-)) foram analisadas na água intersticial de poços piezométricos localizados em diferentes fácies geobotânicas ao longo de um transecto num ecossistema de manguezal na Baía de Sepetiba - Rio de Janeiro. Maiores salinidades e concentrações dos íons maiores são evidencias de evapotranspiração no fácies apicum. Ainda no apicum foram observados os maiores desvios padrão da razão elemento/Cl− durante o período do estudo, indicando intensa diagênese in situ. Razões molares no piezômetro, localizado na borda do manguezal foram consideravelmente menores do que a fonte de água doce, indicando forte influência do fluxo de água marinha. Os resultados das razões molares, SO4(2-)/Cl− e Ca2+/Cl− na borda do manguezal adjacente ao continente sugerem limitada redução de SO4(2-) enquanto os valores relativamente altos na razão Ca2+/Cl− indicam contacto recente com água marinha. |
| first_indexed | 2024-04-13T02:40:55Z |
| format | Article |
| id | doaj.art-08f6c6a7e400447f9c5318c5e686b7ef |
| institution | Directory Open Access Journal |
| issn | 1679-8759 1982-436X |
| language | English |
| last_indexed | 2024-04-13T02:40:55Z |
| publishDate | 2012-03-01 |
| publisher | Universidade de São Paulo |
| record_format | Article |
| series | Brazilian Journal of Oceanography |
| spelling | doaj.art-08f6c6a7e400447f9c5318c5e686b7ef2022-12-22T03:06:11ZengUniversidade de São PauloBrazilian Journal of Oceanography1679-87591982-436X2012-03-01601333910.1590/S1679-87592012000100004Major element concentrations in Mangrove Pore Water, Sepetiba Bay, BrazilChristian J. SandersRenato G. S. BarcellosEmmanoel V. Silva-FilhoConcentrations of cations and anions of major elements (Na+, Ca2+, Mg2+, K+, Cl-, SO4 2-) were analyzed in the pore water of a mangrove habitat. Site specific major element concentrations were identified along a four piezometric well transect, which were placed in distinct geobotanic facies. Evapotranspiration was evident in the apicum station, given the high salinity and major element concentrations. The station landward of an apicum was where major element/Cl- ratios standard deviations are greatest, suggesting intense in situ diagenesis. Molar ratios in the most continental station (4) are significantly lower than the nearby freshwater source, indicating a strong influence of sea water flux into the outer reaches of the mangrove ecosystem and encroaching on the Atlantic rain forest. Indeed, the SO4 2-/Cl- and Ca2+/Cl- ratios suggest limited SO4 2- reduction and relatively high Ca2+/Cl- ratios indicate a region of recent saltwater contact.<br>As concentrações dos elementos maiores (Na+, Ca2+, Mg2+, K+, Cl-, SO4(2-)) foram analisadas na água intersticial de poços piezométricos localizados em diferentes fácies geobotânicas ao longo de um transecto num ecossistema de manguezal na Baía de Sepetiba - Rio de Janeiro. Maiores salinidades e concentrações dos íons maiores são evidencias de evapotranspiração no fácies apicum. Ainda no apicum foram observados os maiores desvios padrão da razão elemento/Cl− durante o período do estudo, indicando intensa diagênese in situ. Razões molares no piezômetro, localizado na borda do manguezal foram consideravelmente menores do que a fonte de água doce, indicando forte influência do fluxo de água marinha. Os resultados das razões molares, SO4(2-)/Cl− e Ca2+/Cl− na borda do manguezal adjacente ao continente sugerem limitada redução de SO4(2-) enquanto os valores relativamente altos na razão Ca2+/Cl− indicam contacto recente com água marinha.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-87592012000100004EvapotranspiraçãoÁgua intersticialRazão Elemento Principal/ClDiagêneseEvapotranspirationGroundwaterMajor Element/Cl RatioDiagenesis |
| spellingShingle | Christian J. Sanders Renato G. S. Barcellos Emmanoel V. Silva-Filho Major element concentrations in Mangrove Pore Water, Sepetiba Bay, Brazil Brazilian Journal of Oceanography Evapotranspiração Água intersticial Razão Elemento Principal/Cl Diagênese Evapotranspiration Groundwater Major Element/Cl Ratio Diagenesis |
| title | Major element concentrations in Mangrove Pore Water, Sepetiba Bay, Brazil |
| title_full | Major element concentrations in Mangrove Pore Water, Sepetiba Bay, Brazil |
| title_fullStr | Major element concentrations in Mangrove Pore Water, Sepetiba Bay, Brazil |
| title_full_unstemmed | Major element concentrations in Mangrove Pore Water, Sepetiba Bay, Brazil |
| title_short | Major element concentrations in Mangrove Pore Water, Sepetiba Bay, Brazil |
| title_sort | major element concentrations in mangrove pore water sepetiba bay brazil |
| topic | Evapotranspiração Água intersticial Razão Elemento Principal/Cl Diagênese Evapotranspiration Groundwater Major Element/Cl Ratio Diagenesis |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-87592012000100004 |
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