State of zoobenthos and marine ecological status along the central part of the Gulf of Finland in 2020, Baltic Sea

Trudy VNIRO Pub Date : 2023-11-11 DOI:10.36038/2307-3497-2023-193-152-161

A. A. Gusev, E. S. Bubnova

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Abstract

The aim: to assess the ecological state of the Gulf of Finland in the summer of 2020 using the benthic index of the ratio of opportunistic polychaetes/amphipods (BOPA) and the benthic index of the ratio of opportunistic annelids/amphipods (BO2A). Research material and methods : the material was collected during the 55th cruise of the PV Akademik Ioffein July 2020. To assess the ecological state of the Gulf of Finland CTD‑soundings and macrozoobenthos data were used, the BOPA and BO2A indices were calculated. Results: the obtained values of the ecological state of water body based on the BOPA and BO2A indices in this study characterize the quality of the sea along the central part in the Gulf of Finland. The negative statistically significant correlation between indices BOPA, BO2A and concentration of the dissolved oxygen are established. Practical significance: a complete picture of the ecological state of the Gulf of Finland in 2020 was obtained. The presented data showed that the concentration of dissolved oxygen in the bottom layer, under conditions of unstable salinity stratification, affects the values of the BOPA and BO2A indices through the tolerance of various taxonomic groups. BOPA and BO2A indices can be used in assessing water quality

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2020年波罗的海芬兰湾中部底栖动物和海洋生态状况

目的:利用机会多毛类/片脚类动物比例底栖指数(BOPA)和机会环节类/片脚类动物比例底栖指数(BO2A)评估2020年夏季芬兰湾的生态状况。研究材料和方法:材料是在2020年7月PV Akademik ioffk第55次巡航期间收集的。为了评价芬兰湾的生态状况，采用CTD测深和大型底栖动物数据，计算了BOPA和BO2A指数。结果:本研究基于BOPA和BO2A指数得到的水体生态状态值表征了芬兰湾中部海域的水质特征。BOPA、BO2A指标与溶解氧浓度呈显著负相关。实际意义:获得了2020年芬兰湾生态状况的全貌。结果表明，在不稳定盐度分层条件下，海底溶解氧浓度通过不同分类类群的耐受性影响BOPA和BO2A指数的值。BOPA和BO2A指标可用于水质评价

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