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  Distribution, sources and biogeochemistry of organic matter in a mangrove dominated estuarine system (Indian Sundarbans) during the pre-monsoon

Ray, R., Rixen, T., Baum, A., Malik, A., Gleixner, G., & Jana, T. K. (2015). Distribution, sources and biogeochemistry of organic matter in a mangrove dominated estuarine system (Indian Sundarbans) during the pre-monsoon. Estuarine, Coastal and Shelf Science, 167, 404-413. doi:10.1016/j.ecss.2015.10.017.

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Item Permalink: https://hdl.handle.net/11858/00-001M-0000-0029-73C2-6 Version Permalink: https://hdl.handle.net/11858/00-001M-0000-0029-73C3-4
Genre: Journal Article

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Ray, R., Author
Rixen, T., Author
Baum, A., Author
Malik, Ashish1, 2, Author           
Gleixner, Gerd1, Author           
Jana, T. K., Author
Affiliations:
1Molecular Biogeochemistry Group, Dr. G. Gleixner, Department Biogeochemical Processes, Prof. S. E. Trumbore, Max Planck Institute for Biogeochemistry, Max Planck Society, ou_1497775              
2IMPRS International Max Planck Research School for Global Biogeochemical Cycles, Max Planck Institute for Biogeochemistry , Max Planck Society, Hans-Knöll-Str. 10, 07745 Jena, DE, ou_1497757              

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 Abstract: The sources and distribution of dissolved organic carbon (DOC), particulate organic carbon (POC) and dissolved inorganic carbon (DIC) in the Indian Sundarbans mangrove and Hooghly estuarine system were examined during the pre-monsoon (summer) 2014. DOC is the dominant form of organic matter (OM) in the studied estuarine waters and represents a mixture of mangrove and riverine sources. Microbial degradation of land derived OM results in a high pCO2 in the Hooghly estuarine waters while enrichment in d13C-DIC ascribes to CO2 uptake by phytoplankton in the Sundarbans water. Higher d15N in the particulate organic nitrogen (PON) of the mangrove and marine zone could be associated with enhanced phytoplankton production sustained by nitrate from mangrove derived OM decomposition and/or nitrate imported from the Bay of Bengal. Low organic carbon contents and elemental ratios (TN/TOC) indicate an intense mineralization and transformation of OM in the sediments, resulting insignificantly different OM compositions compared to those of the three major sources: land derived OM, mangrove leaf litter (Avicennia marina) and in situ phytoplankton production.

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 Dates: 2015-10-162015-10-202015
 Publication Status: Issued
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 Identifiers: Other: BGC2390
DOI: 10.1016/j.ecss.2015.10.017
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Title: Estuarine, Coastal and Shelf Science
  Other : Estuar. Coast. Shelf Sci.
Source Genre: Journal
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Publ. Info: London : Academic Press
Pages: - Volume / Issue: 167 Sequence Number: - Start / End Page: 404 - 413 Identifier: ISSN: 0272-7714
CoNE: https://pure.mpg.de/cone/journals/resource/954928560449