Spacetime Distribution of Plankton Communities (Phyto- and Zooplankton) in the Lower Reaches of the Northern Dvina

• Published in: Inland water biology 2022-12, Vol.15 (6), p.805-812
• Main Authors: Novoselov, A. P., Imant, E. N., Novikova, Y. V., Matveev, N. Y., Klimovsky, N. V., Artem’ev, S. N.
• Format: Article
• Language: English
• Subjects: Abundance; Biodiversity; Biomass; Biomedical and Life Sciences; Chlorophyll; Chlorophyll a; Coastal zone; Composition; Distribution; Freshwater & Marine Ecology; Genera; Geoecology/Natural Processes; Life Sciences; Phytoplankton; Plankton; Spacetime; Species checklists; Species richness; Zooplankton
• ISSN: 1995-0829; 1995-0837
• DOI: 10.1134/S1995082922060165

The 3-year-long (2019–2021) dynamics of the qualitative and quantitative composition of plankton communities in the lower reaches of the Northern Dvina River is analyzed. The results of the analysis of the species richness and the taxonomic composition of zooplankton, as well as of the spacetime distribution of the abundance and biomass of phyto- and zooplankton, are presented. The mean annual phytoplankton biomass and the chlorophyll a concentration varied from 0.42 g/m 3 and 1.04 mg/L in the preestuary coastal areas in 2021 to 2.16 g/m 3 and 5.41 mg/L, respectively, in the Kuznechikha channel in 2020. The species list of zooplankton for the study period included 79 species, the number of which in samples varied from 33 in 2020–2021 to 75 in 2019. In the temporal aspect, the highest quantitative parameters of zooplankton were revealed in 2021; in the spatial aspect, their highest values were recorded in the Kuznechikha and Maimaksa channels in all years of research. The main contribution to zooplankton abundance and biomass was made by species of the genera Bosmina and Eurytemora .