Abstract
Monitoring study of the state of the planktonic and benthic components of the ecosystem of the Golden Horn bay, Peter the Great Bay of the Sea of Japan in the area of the coal terminal was carried out in the autumn of 2020. Phytoplankton in the studied area was characterized by a depleted species composition. In September 2020, phytoplankton bloom was noted at the monitoring points, due to the massive development of diatom microalgae of the Chaethoceros genus, which accounted for 90% of the total phytoplankton. In November, the amount of phytoplankton was an order of magnitude lower, and the role of dinophytic algae increased in the community. Changes in the species composition and quantitative parameters of phytoplankton correspond to the seasonal dynamics in the eastern part of the Amursky bay, which is subject of anthropogenic pollution. Based on the study carried out, it can be concluded that the activities of the coal terminal in the Golden Horn bay had no effect on the structure of communities and, in general, there was no over-normative effect on the state of aquatic biological resources.
Highlights
The quality of natural water and its biological usefulness are mainly determined by the state of biohydrocenoses
There is a need for a comprehensive study of the main parameters of the marine environment and ecosystems of seaports by monitoring the planktonic and benthic components
Changes in the composition of plankton and benthos, noted in the bay, are expressed in the reduction of some species, mainly due to the influence of pollution. These changes are reflected in a decrease in benthos biomass; reduction of the ranges of some species of echinoderms, molluscs, and polychaetes; the disappearance of certain species of animals; the emergence of new biocenoses with dominant species of polychaetes and phoronids [3, 2, 12]
Summary
The quality of natural water and its biological usefulness are mainly determined by the state of biohydrocenoses. The goal of the monitoring work was to assess the state of the planktonic and benthic components of the ecosystem of the Golden Horn bay, Peter the Great Bay of the Sea of Japan in the area of the coal terminal of the commercial seaport in the autumn of 2020. This goal required the following tasks to be solved: - Collection and processing of samples of phyto- and zooplankton, macrobenthos at monitoring points. This goal required the following tasks to be solved: - Collection and processing of samples of phyto- and zooplankton, macrobenthos at monitoring points. - Laboratory processing of samples of zooplankton and macrobenthos. - Assessment of the qualitative and quantitative indicators of phytoplankton, zooplankton, and macrobenthos at monitoring points
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