Abstract
In spring 2016, the thermohaline characteristics of water masses and the distribution of chlorophyll-a concentration in the pelagic zone of the eastern part of the Barents Sea were studied. For the first time, in the conditions of an abnormally warm year and the absence of ice cover, a complex of hydrobiological works was carried out on a section crossing the Barents Sea from south to north along the western coast of the Novaya Zemlya archipelago. High concentrations of chlorophyll-a > 1 ˂ 6 mg/m3 at all stations of the transect indicate a stage of spring bloom in the successional cycle of microalgae. Significant differences in the content of chlorophyll-a in waters of various origins were revealed. The highest concentrations of chlorophyll-a corresponded to Arctic surface water (5.56 mg/m3). Slightly lower values were observed in the transformed Atlantic waters of the Novozemelskoe and Kolguevo–Pechorskoe currents (3.53 ± 0.97–3.71 ± 1.04 mg/m3), and the lowest was in the Barents waters (1.24 ± 0.84–1.45 ± 1.13 mg/m3).
Highlights
In recent decades, there has been an acute problem of the natural impact of climatic factors on the marine ecosystems of the Arctic
Our work aimed to study the distribution of chlorophyll-a concentration in the coastal area of the Novaya Zemlya archipelago, as an indicator of the productivity and the level of quantitative development of the phytoplankton community during the spring stage of the successional cycle
Zemlya archipelago and the absence of spring floods in the archipelago, high concentrations of chlorophyll-a (>1
Summary
This applies to changes in the climatic and hydrological parameters of the Barents Sea under the influence of global warming [1,2]. Climate change has and, according to a number of forecasts, will further have significant implications for Arctic marine ecosystems including all trophic levels: pelagic, benthic, and sympagic (sea-ice related). These changes will alter the distribution and properties of Arctic marine habitats, with associated implications for species composition, production, and ecosystem structure and function [7]. The range of quantitative values (biomass and abundance) of the pelagic algae community development is quite wide and
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