Shells of aquatic freshwater gastropods as archives for heavy metal contamination history of a river-coast transition zone – Proof-of-concept study inSouth India (Kerala and Tamil Nadu)

水生淡水腹足动物的壳作为河岸过渡区重金属污染历史的档案 – 印度南部（喀拉拉邦和泰米尔纳德邦）的概念验证研究

• 批准号: 433042881
• 负责人: Privatdozent Dr. Sven Sindern
• 金额: --
• 依托单位: Geographisches Institut
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2019
• 资助国家: 德国
• 起止时间: 2018-12-31 至 2020-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/433042881?language=en
• 关键词: Shells; aquatic; freshwater; gastropods; archives

Riverine to coastal ecosystems are particularly affected by anthropogenic emissions of heavy metals. This is highly pronounced in densely populated Asian countries showing fast evolution in the last 200 years. The applicability of freshwater gastropods shells to monitor recent to historic transfer of heavy metals to such aquatic ecosystems has so far not been investigated in detail. In this study gastropod shells contained in sedimentary sequences of the Peryiar, Adyar and Cooum rivers in South India will be sampled, taphonomically characterized and analyzed by LA-ICP-MS for trace heavy metals with high spatial resolution. Multiple and single shell sclerochronological approaches will be applied to verify the concept of using freshwater gastropod shells as environmental archives for anthropogenic heavy metal emissions in recent to historic times covering the period of fast social and industrial evolution of the last 200 years.

河流到沿海生态系统特别受重金属的人为排放的影响。在过去200年中，人口稠密的亚洲国家表现出快速发展的亚洲国家，这一点很明显。迄今为止，尚未详细研究淡水胃壳壳的适用性，以监测重金属最近转移到此类水生生态系统的历史转移。在这项研究中，将对印度南部的Peryiar，Adyar和Cooum河流的沉积序列中包含的腹足动物壳进行采样，通过LA-ICP-MS对具有较高空间分辨率的痕量重金属进行Taphonome表征和分析。将采用多种和单壳的硬化方法来验证使用淡水胃壳作为环境档案的概念，用于人为重金属排放量，最近至历史时期，涵盖了过去200年的快速社交和工业发展时期。