Bioindication of Bottom Sediments of the Gulf of Finland by the Composition of Meiobenthos in Combination with Biotesting and Chemical Analysis

The question of the possibility of using meiobenthos to monitor the state of bottom sediments in the Baltic Sea, where bottom macrofauna are unstable due to hypoxia, is of interest. The parameters of meiobenthos and the physicochemical characteristics of bottom sediments and bottom water were studie...

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Bibliographic Details
Published in:Oceanology (Washington. 1965) 2023-06, Vol.63 (3), p.352-362
Main Authors: Berezina, N. A., Petukhov, V. A.
Format: Article
Language:English
Subjects:
Aquatic crustaceans
Biotesting
Bottom sediments
Bottom water
Chemical analysis
Earth and Environmental Science
Earth Sciences
Hydrocarbons
Hypoxia
Macrofauna
Marine Biology
Meiobenthos
Meiofauna
Metal concentrations
Metals
Oceanography
Organic matter
Phosphates
Polycyclic aromatic hydrocarbons
Principal components analysis
Sediment
Sediments
Survival
Toxicity
Zoobenthos
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Summary:The question of the possibility of using meiobenthos to monitor the state of bottom sediments in the Baltic Sea, where bottom macrofauna are unstable due to hypoxia, is of interest. The parameters of meiobenthos and the physicochemical characteristics of bottom sediments and bottom water were studied, and the toxicity of bottom sediments was determined by the survival of the amphipod Gmelinoides fasciatus in 10-day tests for 11 stations in the brackish part of the Gulf of Finland (depths of 10–52 m). Principal component analysis revealed two factors explaining 67% of the variability of the variables and groups of stations similar in terms of conditions. Factor 1 combined nine related variables (depth, metal concentrations, sand fraction in bottom sediments, ratio of nematodes and copepods (N/C index), and survival of amphipods), and Factor 2 combined four variables (organic matter and polyaromatic hydrocarbons in BS, phosphates in water and the number of meiobenthos). Thus, bioindication of the environment by meiobenthos is promising, but requires an integrated approach to be applied in monitoring.
ISSN:0001-4370
1531-8508
DOI:10.1134/S0001437023030025