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首页> 外文期刊>Estuarine Coastal and Shelf Science >Sources and distribution of organic matter in thirty five tropical estuaries along the west coast of India-a preliminary assessment
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Sources and distribution of organic matter in thirty five tropical estuaries along the west coast of India-a preliminary assessment

机译：印度西海岸35个热带河口中有机物的来源和分布-初步评估

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摘要

Studies characterizing the sources of organic matter (OM) to the west coast of India (WCI) and its continental shelf are limited. This study examined sedimentary OM in 35 estuaries along the WCI using molecular biomarkers (lignin phenol), elemental ratio (C/N), and stable carbon isotope (delta C-13) values. Multivariate statistical techniques, such as cluster analysis, identified similar sedimentary chemical properties among the estuaries and their distribution patterns highlight the strong control of geographical provenance on sedimentary OM composition from south to north along the WCI. Results of an end-member mixing model reveal that terrigenous sources (C-3 plants, C-4 plants, and soil) contribute similar to 80% of estuarine OM, with the remaining 20% derived from marine sources (marine plankton and estuarine macrophytes). In the estuaries of large rivers, such as the Narmada and Sabarmati rivers, C-4 plants and soil OM were found to be the dominant contributors of OM, which is likely the result of an abundance of C-4 vegetation and agriculture in their catchment areas.
机译：表征印度西海岸（WCI）及其大陆架有机物（OM）来源的研究有限。这项研究使用分子生物标记物（木质素酚），元素比（C / N）和稳定的碳同位素（δC-13）值研究了沿WCI的35个河口的沉积物OM。多元统计技术，例如聚类分析，在河口之间确定了相似的沉积化学性质，其分布模式突显了沿WCI从南到北对地理来源对沉积物OM组成的强烈控制。最终成员混合模型的结果表明，陆源（C-3植物，C-4植物和土壤）的贡献类似于河口OM的80％，其余20％来自海洋源（海洋浮游生物和河口大型植物） ）。在纳尔默达河和萨巴马蒂河等大型河流的河口中，发现C-4植物和土壤OM是OM的主要贡献者，这很可能是其流域中C-4植被和农业丰富的结果地区。

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