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ISSN 2070-7401 (Print), ISSN 2411-0280 (Online)
Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa
CURRENT PROBLEMS IN REMOTE SENSING OF THE EARTH FROM SPACE

  

Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa, 2023, Vol. 20, No. 4, pp. 250-262

Seasonal variability of biomass and specific growth rate of phytoplankton for 2016–2020 in the deep-water zone of the Black Sea

I.V. Kovalyova 1 , V.V. Suslin 2 
1 A.O. Kovalevsky Institute of Biology of the Southern Seas RAS, Sevastopol, Russia
2 Marine Hydrophysical Institute RAS, Sevastopol, Russia
Accepted: 16.08.2023
DOI: 10.21046/2070-7401-2023-20-4-250-262
The seasonal average values of biomass and the specific growth rate of phytoplankton for three vast deep-water areas (from 500 m) of the Black Sea for 2016–2020 are presented for the first time. Estimates of phytoplankton indicators were carried out using model calculations and data from Aqua/Terra MODIS satellite observations. According to the calculation results, for years with cold winters (with a decrease in winter temperatures below 8 °C), a winter and spring or spring increase in phytoplankton indicators was noted. A noticeable autumn increase in the studied characteristics of phytoplankton was noted in the year after a warm winter. The results obtained are consistent with the estimates of earlier studies of the annual succession of microalgae under the influence of water temperature regime. During the five-year period, the maximum values of biomass were usually observed in winter, and the minimum values in summer. The maximum values of the specific growth rate were observed in different seasons in the years considered. The obtained differences in the seasonal and interannual variability of biomass and the specific growth rate of phytoplankton may indicate that the annual succession in the deep sea is not the same in different years. In 2016–2020, no statistically significant increasing or decreasing trends in the specific growth rate and biomass of phytoplankton were revealed.
Keywords: Black Sea, phytoplankton biomass, specific growth rate of phytoplankton, satellite observations, model calculations
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