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Bulk organic matter characteristics in the Pichavaram mangrove: estuarine complex, south-eastern India
Biogeochemistry Laboratory, School of Environmental Sciences, Jawaharlal Nehru University, New Delhi, India.
Department of Earth Sciences, IISER-Kolkata, Mohanpur, India.
Biogeochemistry Laboratory, School of Environmental Sciences, Jawaharlal Nehru University, New Delhi, India.
2010 (engelsk)Inngår i: Applied Geochemistry, ISSN 0883-2927, E-ISSN 1872-9134, Vol. 25, nr 8, s. 1176-1186Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

The Pichavaram mangrove ecosystem is located between the Vellar and Coleroon Estuaries in south-eastern India. To document the spatial-depth-based variabilities in organic matter (OM) input and cycling, five sediment cores were collected. A comparative study was carried out of grain-size composition, pore water salinity, dissolved organic C (DOC), loss-on-ignition (LOI), elemental ratios (C/N and H/C), pigments (Chl a, Chl b, and total carotenoids), and humification indices. Sand is the major fraction in these cores ranging from 60% to 99% followed by silt and clay; cores from the estuarine margin have high sand content. In mangrove forests, pore-water DOC concentrations are high (32 +/- 14 mg L(-1)), whereas salinity levels are low (50 +/- 5.5 parts per thousand). Likewise, LOI, organic C and N, and pigment concentrations are high in mangroves. OM is mainly derived from upstream terrestrial matter and/or mangrove litter, and marine OM. The humification indices do not vary significantly with depth because of rapid OM turnover. The bulk parameters indicate that the Vellar and Coleroon Estuaries are more affected by anthropogenic processes than mangrove forests. Finally, greater variability and sometimes lack of specific trends in bulk parameters implies that the 2004 tsunami caused extensive mixing in sediments. (C) 2010 Elsevier Ltd. All rights reserved.

sted, utgiver, år, opplag, sider
Elsevier, 2010. Vol. 25, nr 8, s. 1176-1186
HSV kategori
Forskningsprogram
Mikrobiologi
Identifikatorer
URN: urn:nbn:se:liu:diva-151444DOI: 10.1016/j.apgeochem.2010.05.003ISI: 000280622000007OAI: oai:DiVA.org:liu-151444DiVA, id: diva2:1252941
Tilgjengelig fra: 2011-10-04 Laget: 2018-10-03bibliografisk kontrollert

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