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Comparison of bulk organic matter characteristics in sediments of three Kumaun Himalayan lakes
Stockholm University, Faculty of Science, Department of Geology and Geochemistry.
2009 (English)In: Current Science, ISSN 0011-3891, Vol. 97, no 4, 572-575 p.Article in journal (Refereed) Published
Abstract [en]

Three lakes (Nainital, Sattal and Naukuchiatal) in the Kumaun Himalayan region were investigated for total organic carbon (TOC%) and nitrogen (N%), their atomic ratios (C/N) and isotopic composition (delta C-13 and delta N-15) in their sediments. These geochemical proxies measured in 35-45 cm long cores indicate that organic matter preserved in the lake sediments is primarily derived from algal matter. Increase in TOC in all the three lakes suggests increased productivity. The sediments are anoxic in all the three lakes and show low N%. Shift in delta C-13 isotopic composition indicates influence of sewage input into the lakes. Likewise, increase in delta N-15 in surface sediments suggests nitrogen fixation by cyanobacteria.

Place, publisher, year, edition, pages
2009. Vol. 97, no 4, 572-575 p.
Keyword [en]
Kumaun lakes, lake sediments, organic matter, stable isotopes
National Category
Earth and Related Environmental Sciences
URN: urn:nbn:se:su:diva-59949ISI: 000269824500025OAI: diva2:432677
authorCount :3Available from: 2011-08-05 Created: 2011-08-02 Last updated: 2011-08-05Bibliographically approved

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