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Sargassum- associated gastropod and amphipod assemblages in relation to metal pollution in a semi-enclosed bay
Aquatic Ecology ( IF 1.8 ) Pub Date : 2021-03-22 , DOI: 10.1007/s10452-021-09851-8
Pedro Augusto dos Santos Longo , Karine Ferreira Ribeiro Mansur , Silvana Gomes Leite Siqueira , Flávio Dias Passos , Fosca Pedini Pereira Leite

Anthropogenic impacts cause habitat losses and reduce biodiversity in marine coastal habitats. Coastal macroalgae beds and their associate invertebrates are highly susceptible to environmental contamination. This study evaluated the differences in diversity parameters of Sargassum-associated gastropod and amphipod assemblages in areas located at different distances from a pollution source in a semi-enclosed, highly impacted bay, with the concentration of heavy metals in benthic Sargassum spp. as a contamination parameter. The Sargassum collected from sites closer to the source of contamination had higher concentrations of Cu, Zn and Fe. Rarefaction curves demonstrated that gastropod assemblages had significantly lower species richness and diversity at sites closest to the pollution source and regression analysis showed that lower diversity indexes and lower abundance of the main species were correlated with higher levels of most heavy metal concentrations in Sargassum. Amphipod did not present a clear pattern of diversity differentiation, and no correlation of the most abundant species with metal concentrations, even though these animals are known to be sensitive to metal contamination. This study highlights the importance of simultaneously studying different taxonomic groups in order to better understand anthropogenic impacts in marine environments and shows that macroalgae-associated gastropod assemblages are a potential indicator of marine pollution in semi-enclosed areas.



中文翻译:

与半封闭海湾中的金属污染有关的与Sargassum相关的腹足动物和两栖动物组合

人为影响造成栖息地丧失,并减少了海洋沿海栖息地的生物多样性。沿海大型藻类床及其相关的无脊椎动物极易受到环境污染的影响。这项研究评估了半封闭,高冲击海湾中距污染源不同距离的区域中与Sargassum相关的腹足动物和两栖动物组合的多样性参数的差异,以及底栖Sargassum spp中重金属的浓度。作为污染参数。将马尾从靠近污染源的地点收集的铜,锌和铁的浓度较高。反射曲线表明,腹足类动物组合在最靠近污染源的地点具有明显较低的物种丰富度和多样性,回归分析表明,主要物种的较低多样性指数和较低的丰度与Sargassum中大多数重金属浓度的较高相关。。尽管已知这些动物对金属污染敏感,但两栖动物并没有表现出清晰的多样性分化模式,也没有最丰富的物种与金属浓度相关。这项研究强调了同时研究不同分类组的重要性,以便更好地了解海洋环境中的人为影响,并表明与大型藻类相关的腹足动物组合是半封闭区域海洋污染的潜在指标。

更新日期:2021-03-23
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