Dynamics of the Spatial Chlorophyll-A Distribution at the Polar Front in the Marginal Ice Zone of the Barents Sea during Spring

Makarevich, Pavel R; Vodopianova, Veronika V.; Bulavina, Aleksandra S.

doi:10.3390/w14010101

Cited by 13 publications

(10 citation statements)

References 36 publications

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“…The influence of the proximity of the ice edge on the state of phytoplankton communities, described in the literature and observed by us for several years in the Barents Sea [5,6,19], may be the result of various processes. An attempt was made to establish the relationship between the distribution of chlorophyll-a concentration and the possible dissociation of near-bottom gas hydrates and methane transport under the ice cover of the Barents Sea.…”

Section: Discussionmentioning

confidence: 94%

“…Melting sea ice increases gas exchange between the Arctic Ocean and the atmosphere, where previously sea ice served as a physical barrier to methane flow. It was noted that the indicators of phytoplankton abundance (abundance, biomass, chlorophyll-a concentration) are affected by both the Polar Front and the proximity of the ice edge, but the exact mechanism of influence of these factors is not yet clear [5,6,18]. If the influence of the ice edge is associated with the release of methane from ice, and not with anything else, then the influence of melt water should be observed not in all areas of the sea, but only near gas hydrate-bearing zones.…”

Section: Theoretical Aspects Of the Interaction Of Methane Ice Atmosp...mentioning

confidence: 99%

“…An increase in the temperature of the bottom waters of the Barents Sea can cause a violation of the It was noted that the marker of the release of gases on the water surface is the anomalous development of phytoplankton [4]. Phytoplankton studies in the northern part of the Barents Sea [5,6] have shown that the proximity of the ice edge affects the state of phytoplankton communities, but the specific mechanism of this phenomenon is not yet clear.…”

Section: Introductionmentioning

confidence: 99%

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Methane migration, sea ice melting and spatial distribution of chlorophyll-a in the Barents Sea

Bulavina

Vodopianova²,

Zakharenko³

et al. 2022

IOP Conf. Ser.: Earth Environ. Sci.

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The paper considers the theoretical and practical aspects of the relationship between the processes of sea ice melting and methane migration, and their influence on the distribution of chlorophyll-a concentration as an indicator of productivity and the level of quantitative development of the phytoplankton community at the spring stage of the succession cycle. In the spring of 2018 and 2019 the thermohaline characteristics of waters and the content of chlorophyll-a in the Barents Sea were studied. The area of work covered both areas with the most probable release of methane from near-bottom gas hydrates, as well as background areas, where the presence of methane hydrates is unlikely. In 2018, the phytoplankton community of the study area was in the spring flowering stage. In the area of the most probable influence of methane, the average concentrations of chlorophyll-a were approximately 2 times higher than in the background area. High concentrations of the pigment were associated with the thawed layer, which may indicate the release of methane from the ice. In 2019, low concentrations of chlorophyll-a in the edge zone excluded the stage of spring flowering of the phytoplankton community, which did not allow us to trace the possible effect of the release of methane hydrates on the concentration of chlorophyll-a.

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Section: Discussionmentioning

confidence: 94%

Section: Theoretical Aspects Of the Interaction Of Methane Ice Atmosp...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Methane migration, sea ice melting and spatial distribution of chlorophyll-a in the Barents Sea

Bulavina

Vodopianova²,

Zakharenko³

et al. 2022

IOP Conf. Ser.: Earth Environ. Sci.

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“…and Skeletonema) were the most preferable food for zoeal plankton while densities of Chaetoceros and copepod nauplii were too low to support the growth and survival of first-feeding larvae [94]. The total abundances of phyto-and zooplankton demonstrate pronounced spatio-temporal fluctuations during the spring period at high latitudes [12,[105][106][107][108][109][110][111][112]. Such fluctuations can affect the survival and growth rates in RKC larvae in the Bering Sea and other native regions.…”

Section: Role Of Rkc Larvae In Plankton Communities In the Barents Seamentioning

confidence: 99%

“…Other reported climatic changes include the freshening of surface waters and their warming associated with enhanced river discharge and ice melting [9,10]. These processes may be responsible for shifts in water stratification, light regime, acidification, nutrient availability, biogeochemical cycles, and carbon fluxes in the marine ecosystems of the Arctic Ocean and adjacent shelf regions [11,12] leading to borealization of flora and fauna [13][14][15]. Human activity may reinforce the effects of the environmental perturbations leading to altering of the Arctic marine ecosystems [16,17].…”

Section: Introductionmentioning

confidence: 99%

Ecology and Distribution of Red King Crab Larvae in the Barents Sea: A Review

Dvoretsky

2022

Water

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The red king crab (RKC) is a large invasive species inhabiting bottom communities in the Barents Sea. Larval stages of RKC play an important role in determining the spread and recruitment of the population in the coastal waters. We present a review of studies concerned with the ecology of RKC larvae in the Barents Sea focusing on their dynamics and role in the trophic food webs as well as on the role of environmental factors in driving RKC zoeae. Zoeal stages are larger, and their development time is shorter in the Barents Sea compared to the North Pacific. RKC larvae appear in late January–February and can be found in the coastal plankton until mid-July. Mass hatching of RKC larvae in the Barents Sea starts in late March-early April. The highest densities of RKC larvae are located in small semi-enclosed bays and inlets with weak water exchange or local eddies as well as in inner parts of fjords. Size structures of the zoeal populations are similar in the inshore waters to the west of Kola Bay but slightly differ from those in more eastern regions. RKC larvae perform daily vertical migrations and move to deeper depths during bright daylight hours and tend to rise during night hours. RKC larvae are plankton feeders that ingest both phyto- and zooplankton. A set of environmental variables including food conditions, water temperature, and advective influence are the most important factors driving the spatial distribution, phenology, survival rates, development, growth, and interannual fluctuations of RKC larvae. Recent climatic changes in the Arctic may have both negative and positive consequences for RKC larvae.

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Water mass influence on spatial and seasonal distributions of diatoms, dinoflagellates and coccolithophores in the western Barents Sea

Luan,

Mitchell,

Henley

et al. 2024

Polar Biol

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Arctic phytoplankton are highly sensitive to seawater physical and chemical conditions, especially in the context of rapid climate change and sea ice loss. We studied the spatial and seasonal distributions of diatoms, dinoflagellates and coccolithophores, and clarified their associations with light, temperature and nutrients in the western Barents Sea in late summer 2017, and winter, spring and early summer 2018. Diatoms, composed mainly of Chaetoceros, Fragilariopsis and Thalassiosira, bloomed in spring at the southern border of the marginal ice zone with mean abundance of 1.1 × 106 cells L−1 and biomass of 119.5 µg C L−1, and were observed to follow the retreat of sea ice in the Arctic water to the north at the shelf break near Nansen Basin, contributing to the progression of the summer situation. Dinoflagellates flourished in surface waters south of Svalbard in summer, with maxima of 2.2 × 105 cells L−1 and 78.2 µg C L−1. High abundances and calcite mass of coccolithophores were detected in the southern Barents Sea and southwest of Svalbard in summer, with maxima of 3.3 × 105 cells L−1 and 4.7 µg C L−1. Two distinct phytoplankton assemblages, closely linked with Atlantic water and Arctic water, were geographically separated by the Polar Front in two summers, with a percent similarity below 11.9%, suggesting great influence of the two water masses on large-scale distributions of phytoplankton. Redundancy analysis revealed that temperature was one of the most important factors in shaping the seasonal distributions of diatoms, while irradiance showed positive correlation with dominant dinoflagellates of each season. From the perspectives of phytoplankton composition and carbon biomass, our findings highlight the governing effect of physical seawater conditions on driving seasonal patterns of phytoplankton biogeography, as well as the pivotal role of nutrients in supporting the phytoplankton growing seasons in the western Barents Sea.

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Dynamics of the Spatial Chlorophyll-A Distribution at the Polar Front in the Marginal Ice Zone of the Barents Sea during Spring

Cited by 13 publications

References 36 publications

Methane migration, sea ice melting and spatial distribution of chlorophyll-a in the Barents Sea

Methane migration, sea ice melting and spatial distribution of chlorophyll-a in the Barents Sea

Ecology and Distribution of Red King Crab Larvae in the Barents Sea: A Review

Water mass influence on spatial and seasonal distributions of diatoms, dinoflagellates and coccolithophores in the western Barents Sea

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