Organic matter and amino acid concentrations in surface sediments of Vembanad Lake – a tropical estuary, west coast of India

被引：0
|
作者：
A. Verma
V. Subramanian
机构：
[1] School of Environmental Sciences,
[2] Jawaharlal Nehru University,undefined
[3] New Delhi 110 067,undefined
[4] India,undefined
来源：
Regional Environmental Change | 2002年 / 2卷
关键词：
Organic matter Amino acids Hexosamines Vembanad Lake;
D O I：
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学科分类号：
摘要：
The surface sediments of Vembanad Lake, a tropical estuary on the west coast of India, were analyzed for carbon (TC, TOC, TIC), nitrogen (TN), amino acids and two amino sugars. C/N ratios for the surface sediments vary from 1.0–21.8, indicating terrestrial sources of organic matter. Various biogeochemical indicators based on amino acids such as Asp/β-ala and Glu/γ-aba ratios revealed that the organic matter in the 5- to 10-cm surface sediments was fresh and had not undergone extensive degradation. However, the Gluam/Galam ratio for surface sediments of Vembanad Lake varies from 0.4–2.1, indicating the dominance of bacterial biomass in the sediments. Organic matter in the sediments was found to be highly reactive, with a reactivity index ranging from 2.4–7.4, suggesting rapid remineralization.
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页码：143 / 149
页数：6
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