Major element concentrations in Mangrove Pore Water, Sepetiba Bay, Brazil

Sanders, Christian J.; Barcellos, Renato G. S.; Silva-Filho, Emmanoel V.

Abstracts

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.

Evapotranspiration; Groundwater; Major Element/Cl Ratio; Diagenesis

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.

Evapotranspiração; Água intersticial; Razão Elemento Principal/Cl; Diagênese

MCGOWAN, K. T.; MARTIN, J. B. Chemical composition of mangrove-generated brines in Bishop Harbor, Florida: Interactions with submarine groundwater discharge. Mar. Chem, v. 104, p. 58-68, 2007.
MOORE, W. S. The subterranean estuary: a reaction zone of ground water and sea water. Mar. Chem, v. 65, p. 111-125, 1999.
MOORE, W. S. Fifteen years experience in measuring ²²⁴Ra and ²²³Ra by delayed-coincidence counting. Mar. Chem, v. 109, p. 188-197, 2008.
RAO, M. N. et al. Fluid-evaporation records preserved in salt assemblages in Meridiani rocks. Earth planet. Sci. Letts, v. 286, p. 396-403, 2009.
RIDD, P.V.; STIEGLITZ, T. Dry season salinity changes in arid estuaries fringed by mangroves and saltflats. Estuar. coastá Shelfá Sci., v. á54, p. 1039-1049, á2002.
SANDERS, C. J.;á SMOAK, J. M.;á NAIDU, A. S.; PATCHINEELAM, S. R.á Recent sediment accumulation in a mangrove forest and its relevance to local sea level rise (Ilha Grande, Brazil). J. coast. Res, v. 24, n. 2, p. 533-536, 2008.
SANTOS, I. R., et al. Nutrient biogeochemistry in a Gulf of Mexico subterranean estuary and groundwater derived fluxes to the coastal ocean. Limn. Ocean, v. 53 n.2, p. 705 - 718, 2008.
SHEPHERD, T. J.;á NADEN, J.;á CHENERY, S. R. ;á MILODOWSKI, A. E. ; GILLESPIE, M. R. Chemical analysis of palaeogroundwaters: a new frontier for fluid inclusion research. J. geochem. Explor, v. 69-70 p. 415-418, 2000.
SILVA-FILHO, E. V. et al. Groundwater chemical characterization of a Rio de Janeiro coastal aquifer, SE - Brazil. J. South American Earth Sci., v. 27, p.á 100-108, 2009.
SMOAK, J.;á SANDERS, C. J.;á MOORE, W. S.;á GODOY, J. M.;á PATCHINEELAM, S. R. Large submarine groundwater inputs to Sepetiba Bay, Rio deá Janeiro State, Brazil. In: áAGU FALL MEETING, San Fransisco, Ca, 2006.
SMOAK, J. M.; PATCHINEELAM S. R. Mangroves Salt Marshes,v. 3, p. 17, 1999.
SOARES, M. L. G. Reflexos das alterações climáticas sobre o ecossistema manguezal. In: CONGRESSO LATINO-AMERICANO DE CIENCIAS DO MAR, 14. áBalneario Camboriu, SC, Brazil, 2011.
SOARES, M. L. G.; SCHAEFFER-NOVELLI, Y.; CINTRON-MOLERO,G. The use of mangroves as indicators of sea-level changes. In: ^áINTERNATIONAL WETLAND SYMPOSIUM, 6.á INTERNATIONAL ASSOCIATION OF ECOLOGY. MILLENNIUM WETLAND EVENT,á Quebec, Canada, 2000. áp. 213.
SOTO-JIMÉNEZ, M. F.;á PÁEZ-OSUNA, F. A first approach to study the mobility and behavior of lead in hypersaline salt marsh sediments: Diffusive and advective fluxes, geochemical partitioning and Pb isotopes. J. geochem. Explor, v. 104, p.á 87-96, 2010.

Publication Dates

Publication in this collection
15 May 2012
Date of issue
Mar 2012

History

Received
10 Aug 2011
Accepted
03 Feb 2012
Reviewed
22 Nov 2011

This work is licensed under a Creative Commons Attribution 4.0 International License.

[1] MCGOWAN, K. T.; MARTIN, J. B. Chemical composition of mangrove-generated brines in Bishop Harbor, Florida: Interactions with submarine groundwater discharge. Mar. Chem, v. 104, p. 58-68, 2007.

[2] MOORE, W. S. The subterranean estuary: a reaction zone of ground water and sea water. Mar. Chem, v. 65, p. 111-125, 1999.

[3] MOORE, W. S. Fifteen years experience in measuring ²²⁴Ra and ²²³Ra by delayed-coincidence counting. Mar. Chem, v. 109, p. 188-197, 2008.

[4] RAO, M. N. et al. Fluid-evaporation records preserved in salt assemblages in Meridiani rocks. Earth planet. Sci. Letts, v. 286, p. 396-403, 2009.

[5] RIDD, P.V.; STIEGLITZ, T. Dry season salinity changes in arid estuaries fringed by mangroves and saltflats. Estuar. coastá Shelfá Sci., v. á54, p. 1039-1049, á2002.

[6] SANDERS, C. J.;á SMOAK, J. M.;á NAIDU, A. S.; PATCHINEELAM, S. R.á Recent sediment accumulation in a mangrove forest and its relevance to local sea level rise (Ilha Grande, Brazil). J. coast. Res, v. 24, n. 2, p. 533-536, 2008.

[7] SANTOS, I. R., et al. Nutrient biogeochemistry in a Gulf of Mexico subterranean estuary and groundwater derived fluxes to the coastal ocean. Limn. Ocean, v. 53 n.2, p. 705 - 718, 2008.

[8] SHEPHERD, T. J.;á NADEN, J.;á CHENERY, S. R. ;á MILODOWSKI, A. E. ; GILLESPIE, M. R. Chemical analysis of palaeogroundwaters: a new frontier for fluid inclusion research. J. geochem. Explor, v. 69-70 p. 415-418, 2000.

[9] SILVA-FILHO, E. V. et al. Groundwater chemical characterization of a Rio de Janeiro coastal aquifer, SE - Brazil. J. South American Earth Sci., v. 27, p.á 100-108, 2009.

[10] SMOAK, J.;á SANDERS, C. J.;á MOORE, W. S.;á GODOY, J. M.;á PATCHINEELAM, S. R. Large submarine groundwater inputs to Sepetiba Bay, Rio deá Janeiro State, Brazil. In: áAGU FALL MEETING, San Fransisco, Ca, 2006.

[11] SMOAK, J. M.; PATCHINEELAM S. R. Mangroves Salt Marshes,v. 3, p. 17, 1999.

[12] SOARES, M. L. G. Reflexos das alterações climáticas sobre o ecossistema manguezal. In: CONGRESSO LATINO-AMERICANO DE CIENCIAS DO MAR, 14. áBalneario Camboriu, SC, Brazil, 2011.

[13] SOARES, M. L. G.; SCHAEFFER-NOVELLI, Y.; CINTRON-MOLERO,G. The use of mangroves as indicators of sea-level changes. In: ^áINTERNATIONAL WETLAND SYMPOSIUM, 6.á INTERNATIONAL ASSOCIATION OF ECOLOGY. MILLENNIUM WETLAND EVENT,á Quebec, Canada, 2000. áp. 213.

[14] SOTO-JIMÉNEZ, M. F.;á PÁEZ-OSUNA, F. A first approach to study the mobility and behavior of lead in hypersaline salt marsh sediments: Diffusive and advective fluxes, geochemical partitioning and Pb isotopes. J. geochem. Explor, v. 104, p.á 87-96, 2010.

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Major element concentrations in Mangrove Pore Water, Sepetiba Bay, Brazil

Abstracts

Publication Dates

History