Bioaccumulation of Chemical Elements and Organic Carbon in Macrozoobenthic Organisms of the Laptev Sea

IF 1.3 4区地球科学 Q4 OCEANOGRAPHY Oceanology Pub Date : 2024-04-22 DOI:10.1134/s0001437024010041

L. L. Demina, S. V. Galkin, A. S. Solomatina

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Abstract

Within the program “Marine Ecosystems of the Siberian Arctic,” based on materials collected during cruises 69 and 72 of the R/V Akademik Mstislav Keldysh, the distribution of chemical elements (As, Ba, Bi, Co, Cr, Cr, Cd, Co, Cu, Cr, Mn, Ni, Pb, Sc, Ti, Tl, Th, V, U, and Zn) and organic carbon in the benthic mass taxa of methane seepage fields in the Laptev Sea and outside of them was examined. For the first time, the bioaccumulation potential (BP) was quantified, taking into account, in addition to the concentrations of elements in organisms, their biomass. On the C-15 methane field, the ophiuroid population accumulates each element per square meter of seafloor up to 40 times greater than at the background station. Ophiuroids and bivalves exhibited elevated BP for Ni, As, Ba, Cu, Ti, V, Mn, and Zn compared to other elements. At the same time, the BP of ophiuroids significantly exceeds that of bivalves. It is suggested that the increased bioaccumulation of some heavy metals and metalloids is related to greater bioavailability of organic matter in the bottom sediments of methane seeps. Organic carbon revealed the highest BP, which was especially pronounced in the C-15 methane field. At the background station, taxa accumulate a significantly smaller (by a factor of 10) amount of carbon in their biomass. As a result of the detritus feeders’ activity, bottom sediments are enriched in organic carbon, which indicates an important contribution of benthic organisms to the carbon cycle in the Arctic seas.

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拉普捷夫海大型底栖生物体内化学元素和有机碳的生物累积作用

摘要在 "西伯利亚北极海洋生态系统 "计划中，根据 "Akademik Mstislav Keldysh "号考察船第 69 和 72 次航行期间收集的材料，研究了拉普捷夫海甲烷渗漏区及其外的底栖生物群分类群中化学元素（As、Ba、Bi、Co、Cr、Cr、Cd、Co、Cu、Cr、Mn、Ni、Pb、Sc、Ti、Tl、Th、V、U 和 Zn）和有机碳的分布情况。除了考虑生物体内的元素浓度外，还首次对生物累积潜力（BP）进行了量化。在 C-15 甲烷场上，每平方米海底的片脚类动物对每种元素的累积量是背景站的 40 倍。与其他元素相比，片脚类动物和双壳类动物对 Ni、As、Ba、Cu、Ti、V、Mn 和 Zn 的生物累积量较高。同时，片脚类动物的生物累积浓度明显高于双壳类动物。这表明，一些重金属和类金属的生物累积量增加与甲烷渗漏底部沉积物中有机物的生物利用率提高有关。有机碳的生物累积量最高，这在 C-15 甲烷区尤为明显。在本底站，分类群在其生物量中积累的碳明显较少（10 倍）。由于碎屑取食者的活动，底层沉积物富含有机碳，这表明底栖生物对北极海域的碳循环做出了重要贡献。

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来源期刊

Oceanology 地学-海洋学

CiteScore

2.00

自引率

20.00%

发文量

审稿时长

6-12 weeks

期刊介绍： Oceanology, founded in 1961, is the leading journal in all areas of the marine sciences. It publishes original papers in all fields of theoretical and experimental research in physical, chemical, biological, geological, and technical oceanology. The journal also offers reviews and information about conferences, symposia, cruises, and other events of interest to the oceanographic community.