Substrate damage and recovery after giant clam shell mining at remote coral reefs in the southern South China Sea

被引：0
作者：
Shengnan Zhou
Qi Shi
Hongqiang Yang
Xiyang Zhang
Xiaoju Liu
Fei Tan
Pin Yan
机构：
[1] CAS,Key Laboratory of Ocean and Marginal Sea Geology, South China Sea Institute of Oceanology
[2] Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou),Nansha Marine Ecological and Environmental Research Station
[3] CAS,undefined
[4] University of Chinese Academy of Sciences,undefined
来源：
Journal of Geographical Sciences | 2021年 / 31卷
关键词：
giant clam shell mining; substrate components; micro-relief; reef flat; South China Sea;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Giant clam shell mining (GCSM), a unique phenomenon occurring at remote coral reefs in the southern South China Sea (SCS), forms striking scars on the reef flats and damages the reef flat substrate. Through image analyses at three times (2004.02.02, 2014.02.26, and 2019.04.10) and in situ surveys at Ximen Reef, a representative site that has experienced GCSM, we quantified the GCSM-generated substrate damage and the corresponding recovery. GCSM was estimated to have occurred sometime between 2012 and 2014, causing reduction in live coral subarea and formation of micro-relief as trenches and mounds. GCSM-generated damage was restricted to the reef flat. After GCSM, coral and algae subarea increased, and the trenches and mounds tended to be filled and eroded, representing a natural recovery of the substrate. The legal prohibition on human disturbances at the coral reefs contributed to substrate recovery at Ximen Reef. This case also implied that recovery of the other coral reefs that suffered from GCSM is possible.
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页码：1655 / 1674
页数：19
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