Sea Cucumber as Bioindicator of Trace Metal Pollution in Coastal Sediments
Sea Cucumber as Bioindicator of Trace Metal Pollution in Coastal Sediments
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DOI：
10.1007/s12011-020-02308-3
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发表时间：
2020-08-17
影响因子：
3.9
通讯作者：
Diez, Sergi
中科院分区：
文献类型：
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作者：
Marrugo-Negrete, Jose;Pinedo-Hernandez, Jose;Diez, Sergi
世界各地都有海参出口到亚洲，但很少有研究评估金属污染和风险评估。本研究评估了微量金属的浓度和潜在的生态风险，海参（Holothuria floridana）和沉积物中的西斯帕塔湾，在哥伦比亚的加勒比海沿岸。生物群和沉积物中痕量金属含量的变化趋势相似，Cu > Zn > Hg > Pb > Cd。汞的生物富集系数最高，根据沉积物质量准则，铜含量表明生态系统中存在不利的生物影响。在这方面，铜水平高于效应范围低，阈值效应水平（TEL）和最低效应水平在所有的站点，而汞水平高于TEL在大多数的。根据最大允许每日消费率（CRlim）进行的健康风险评估结果表明，对成人没有风险;但是，儿童应限制或避免其消费。多变量统计分析的结果表明，农业活动（即，施用化肥和农用化学品）被确定为金属污染的主要人为来源。本研究表明，海参可以作为一种生物指示物种在监测金属污染的研究，特别是要注意的高度显着的相关性之间的锌在组织和沉积物。本研究还揭示了人类活动可能对海湾沉积物的质量产生负面影响，并有助于对海参中金属积累的认识。
Sea cucumbers are fished worldwide for export to Asia, but few studies have evaluated metal pollution and risk assessment. This study assessed concentration of trace metals and the potential ecological risk in sea cucumber (Holothuria floridana) and sediments at the Cispata Bay, in the Caribbean Coast of Colombia. The trace metal concentrations in biota and sediments showed a similar decreasing trend as follows: Cu > Zn > Hg > Pb > Cd. The highest bioconcentration factor was found for Hg, and according to the sediment quality guidelines, Cu levels indicate adverse biological effects in the ecosystem. In this regard, Cu levels were higher than effects range low and the threshold effect levels (TEL) and lowest effect level in all the stations, whereas Hg levels were higher than TEL in most of them. Results for health risk assessment based on the maximum allowable daily consumption rate (CRlim) suggest that there is no risk to adults; however, children should limit or avoid its consumption. Results from multivariate statistical analysis suggest that agricultural activities (i.e., application of fertilizers and agrochemicals) were identified as the main anthropogenic sources of metal pollution. This research suggest that sea cucumber could be used as a bioindicator species in studies of monitoring metal contamination, with special attention to the highly significant correlation between Zn in tissue and sediments. This study also reveals that anthropic activities may have negative effects in the quality of the sediments of the bay and contributing to the knowledge of metal accumulation in sea cucumber.