南海珊瑚礁区棘冠海星重金属含量及其生物积累特征分析

棘冠海星（Acanthaster planci）是珊瑚的天敌，可以对珊瑚礁生态系统造成重大的危害，但迄今尚未见其重金属含量与生物积累特征的报道。本文以南海珊瑚礁区的棘冠海星为研究对象，利用电感耦合等离子体质谱仪测定其12种重金属（含类金属As）的含量，通过主成分分析、Kruskal-Wallis方差检验的方法解析其分布...

Analysis of heavy metal contents and bioaccumulation characteristics of Acanthaster planci in coral reef of South China Sea

As a natural enemy of corals, Acanthaster planci has caused significant harms to the coral reef ecosystem. However, the heavy metal contents and bioaccumulation characteristics of Acanthaster planci have not been reported. In this paper, the contents of 12 heavy metals (including metalloid As) were determined by inductively coupled plasma mass spectrometry (ICP-MS) in Acanthaster planci collected from coral reefs in the South China Sea. The distribution characteristics were analyzed by Kruskal-Wallis test and principal component analysis. The results showed that V, Cr, Cu, As, Cd, Fe, Zn, Mo were mainly accumulated in the pyloric caeca, gonad and stomach; Mn, Co, Ni, Pb were mainly concentrated in the skeleton, spines and body wall of Acanthaster planci, due to the structural and functional differences of various tissues and organs. Acanthaster planci can easily accumulate Zn, As and Cd in the environment through bioconcentration and biomagnification, and the accumulation characteristics are related to individual metabolic activity and physiological regulation characteristics. The results can provide a scientific basis for understanding the outbreak process of Acanthaster planci and protecting the coral reef ecosystem.