Effects of Climate Change on Chlorophyll a in the Barents Sea: A Long-Term Assessment

Dvoretsky, Vladimir G.; Vodopianova, Veronika V.; Bulavina, Aleksandra S.

doi:10.3390/biology12010119

Cited by 20 publications

(10 citation statements)

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“…The intensity of Atlantic flow into BS and FS is reported to be clearly associated with atmospheric variability over the North Atlantic [ 2 , 5 , 17 , 88 ]. Moreover, this trend is proposed to continue into the future [ 11 ]. The North Atlantic Oscillation (NAO) is a measure to estimate the atmospheric influence of the climatic conditions in the northern hemisphere [ 28 ].…”

Section: Discussionmentioning

confidence: 99%

“…The winter and annual NAO indices demonstrated clear fluctuations during the period of 2000–2021, and the long-term trend was close to zero. The period of anomalously positive events can be noticed in 2014–2020 [ 5 , 11 ]. Moreover, warming processes caused an increase in the total area of open water and led to a prolonged duration of the open water season [ 8 , 9 , 12 , 17 ].…”

Section: Discussionmentioning

confidence: 99%

“…Many previous works have reported extremely low phytoplankton abundance and biomass during the period of the polar night in the BS, FS, and Svalbard waters [ 11 , 61 , 62 , 63 , 100 , 104 ]. In the present study, we used Chl-a content as a proxy to estimate the total phytoplankton biomass.…”

Section: Discussionmentioning

confidence: 99%

“…The effects of temperature and salinity on microalgae have been studied in the spring and summer periods [ 29 , 46 , 51 ]. These factors are thought to indirectly affect the phytoplankton in the Arctic, causing the stabilization of the water column [ 7 , 8 , 9 , 11 , 13 ]. In the productive seasons, the light regime plays an important role.…”

Section: Discussionmentioning

confidence: 99%

“…Total net primary production (NPP) and chlorophyll a values may be considered to be integral indicators of marine ecosystems in the Arctic, and these were reported to have increased in the last few decades [ 7 , 8 , 9 ]. Moreover, this trend is proposed to continue in the future [ 10 , 11 ]. Such climatic fluctuations have led to the alteration of pelagic assemblages and food web structures in the Arctic [ 12 , 13 , 14 , 15 ].…”

Section: Introductionmentioning

confidence: 99%

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Marine Plankton during the Polar Night: Environmental Predictors of Spatial Variability

Dvoretsky

Venger

Vashchenko

et al. 2023

Biology

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We studied the spatial patterns of the planktonic ecosystems at two Arctic sites strongly affected by Atlantic Inflow (FS, the Fram Strait; and BS, the Barents Sea). A high degree of similarity in the bacterial abundance (mean: 3.1 × 105 cells mL−1 in FS vs. 3.5 × 105 cells mL−1 in BS) was found, while other plankton characteristics were different. Bacterial biomass reached a maximum in BS (3.2–7.9 mgC m−3), while viral abundances tended to be higher in FS (2.0–5.7 × 106 particles mL−1). Larger bacterial cells were found in BS, suggesting the presence of different bacterial populations at both locations. The virus-to-bacteria ratio was significantly higher in FS than in BS (13.5 vs. 4.7). Chlorophyll a concentration was extremely low (<0.25 mg m−3). The highest zooplankton abundance was in the surface layer (919 individuals m−3 in FS vs. 602 ind. m−3 in BS). Zooplankton biomass strongly varied (1–39 mgC m−3), with the maximum in BS. High proportions of boreal taxa in the total zooplankton abundance indicate the Atlantification of pelagic ecosystems in the Arctic. Plankton indicators are correlated with temperature, salinity, and sampling depth. Strong intercorrelations were found between major plankton groups, suggesting tight links in the studied plankton ecosystems.

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Section: Discussionmentioning

confidence: 99%