Individual body size as a predictor of lipid storage in Baltic Sea zooplankton

Gorokhova, Elena

doi:10.1093/plankt/fbz010

Cited by 8 publications

(4 citation statements)

References 39 publications

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“…The result would be more carbon cycling in the pelagic, favoring the accumulation of small copepods. Smallerbodied zooplankton are lower in energy density and are often lipid-poor relative to larger zooplankton (Siddon et al 2013, Gorokhova 2019. The increase in smaller-sized zooplankton taxa may also accompany a decline in the lipid-rich Calanus spp., though it has been suggested that the increasing number of smaller zooplankton (with some lipid storage) may compensate for the loss of lipid-rich species of Calanus (Renaud et al 2018).…”

Section: )mentioning

confidence: 99%

The northern Bering Sea zooplankton community response to variability in sea ice: evidence from a series of warm and cold periods

Kimmel¹,

Eisner²,

Pinchuk³

2023

Mar. Ecol. Prog. Ser.

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Recent, unprecedented losses of sea ice have resulted in widespread changes in the northern Bering Sea ecosystem, and this study explores the zooplankton community response. Time-series observations were used to identify zooplankton community changes in the northern (>60°N) Bering Sea (NBS) over a 17 yr period (2002-2018). The overall objective was to determine if the changes in zooplankton populations previously described for the southeastern Bering Sea shelf (<60°N) were also observed in the NBS over alternating warm and cold periods. Particular attention was paid to more recent (2014-2018) years that showed significant losses of sea ice in the NBS (2017/2018) in comparison to a prior warm period (2003-2005) and an intervening cold period (2006-2013). A multivariate framework (redundancy analysis) was used to explore correlations with environmental conditions, and differences in mean abundance across the differing warm and cold periods were tested. The NBS zooplankton community had different responses across each warm and cold period, and the primary driver for the differences in response was sea ice. Redundancy analysis demonstrated that the zooplankton community during the second warm period experienced greater variability compared to the prior warm period. The zooplankton community had higher abundances of small copepods and meroplankton and reduced abundances of Calanus spp. and chaetognaths during the most recent warm period. This suggests that the NBS zooplankton will not be impacted by reduced sea ice when the ice coverage extends south of 60°N, but show community change once a minimum threshold in ice extent and timing of retreat is reached. Shifts in the zooplankton community may have had cascading effects on higher trophic levels that were evident during the latter warm period.

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confidence: 99%

The northern Bering Sea zooplankton community response to variability in sea ice: evidence from a series of warm and cold periods

Kimmel¹,

Eisner²,

Pinchuk³

2023

Mar. Ecol. Prog. Ser.

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“…The present study revealed that copepods distributed and fed on to the sardine in the offshore area were larger (heavier) than those in the coastal area. In general, larger copepods tend to accumulate more lipids because of larger body cavities (Gorokhova, 2019; Kattner & Hagen, 2009; Lee et al, 2006). Hence, the lipid content of zooplankton assemblages might vary in association with the copepod abundance and the individual copepod mass.…”

Section: Discussionmentioning

confidence: 99%

Cold offshore area provides a favorable feeding ground with lipid‐rich foods for juvenile Japanese sardine

Yasuda

Kitajima

Hayashi

et al. 2021

Fisheries Oceanography

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Japanese sardine (Sardinops melanostictus) in the Sea of Japan expanded their distribution from the coast to offshore with an increase in population biomass; however, little is known about the suitability of the offshore habitat for this species. Using lipid analysis, this study compared the body condition of juvenile sardine between an area off the Noto Peninsula (offshore) and the Tsushima Strait (coast), with respect to habitat conditions during the summer, from 2015 to 2017. Sardine in the offshore area had larger bodies and higher lipid contents than those in the coastal area. Regarding the sardine diet, lipid content of the offshore zooplankton was clearly higher than that of the coastal zooplankton. Hence, we found a positive effect of this dietary lipid content on sardine lipid content, suggesting that these lipid measurements could explain the trophic relationship between sardine and zooplankton. The higher lipid content in offshore zooplankton was mainly attributed to the abundance of large‐sized copepods and lower water temperatures. Such lipid measurements might involve habitat‐specific characteristics of zooplankton assemblage. In conclusion, compared to the coastal area, the offshore area is considered a more favorable habitat for the sardine in terms of lipid availability.

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“…Temperature has direct effects on metabolic rates of aquatic organisms and fatty acid modifications in their membrane lipids to maintain fluidity and function (Parrish, 2013). Moreover, warming is shifting the plankton communities towards smaller size and thus, reduced individual lipid content (Daufresne et al, 2009;Mäkinen et al, 2017b;Renaud et al, 2018;Gorokhova, 2019), and towards increased heterotrophy, which decreases the availability of DHA and EPA (Dahlgren et al, 2011). The Baltic Sea is a large pool of brackish water, where salinity determines the species distribution and community structure (Diekmann et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Fatty acid profiles reveal dietary variability of a large calanoid copepod Limnocalanus macrurus in the northern Baltic Sea

von Weissenberg,

Ruhanen,

Holopainen

et al. 2024

Front. Mar. Sci.

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Eutrophication, climate-induced warming, and salinity fluctuations are altering the fatty acid profiles and the availability of essential polyunsaturated fatty acids (PUFAs) in marine zooplankton communities. Limnocalanus macrurus Sars G.O., 1863 is a large calanoid copepod inhabiting the low-salinity areas in the Baltic Sea, where it is a major source of docosahexaenoic acid (DHA) and eicosapentaenoic acid (EPA) to commercially important fish. L. macrurus is sensitive to warming, eutrophication and hypoxia. As an opportunistic feeder, it is capable of dietary shifts, which affects its fatty acid profiles. Although much studied in boreal lakes, there are only a few studies on the fatty acid profiles of the Baltic Sea populations. This study aimed to compare the fatty acid profiles of L. macrurus in three basins of the Baltic Sea, in relation to the community fatty acids and environmental variables. We collected samples of L. macrurus and filtered plankton community for gas chromatographic fatty acid analyses in August 2021 on R/V Aranda. The nutritional quality of L. macrurus to consumers was lower in the Gulf of Finland (GoF) compared to the Gulf of Bothnia, indicated by the low levels of DHA and EPA, as well as the low n-3/n-6 ratio of PUFAs. The lower ratio of 18:1n-7 to 18:1n-9 implied higher degree of omnivory in GoF. In contrast, a diatom marker 16:1n-7 had high proportion in the Bothnian Bay. High temperatures in GoF may have restricted feeding in the upper water column, possibly forcing a shift towards cyanobacteria or seston-based diet, as interpreted from a high proportion of 18:2n-6 and 18:3n-3. We conclude that the ability of L. macrurus to utilize multiple food sources increases its resilience to environmental change, while the consequences on the nutritional quality may have further cascading effects on the food webs.

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Individual body size as a predictor of lipid storage in Baltic Sea zooplankton

Cited by 8 publications

References 39 publications

The northern Bering Sea zooplankton community response to variability in sea ice: evidence from a series of warm and cold periods

The northern Bering Sea zooplankton community response to variability in sea ice: evidence from a series of warm and cold periods

Cold offshore area provides a favorable feeding ground with lipid‐rich foods for juvenile Japanese sardine

Fatty acid profiles reveal dietary variability of a large calanoid copepod Limnocalanus macrurus in the northern Baltic Sea

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