Composition and Dynamics of the Black Sea Benthopelagic Plankton and Its Contribution to the Near-Shore Plankton Communities

Vereshchaka, Alexander L.; Anokhina, L. L.

doi:10.1371/journal.pone.0099595

Cited by 9 publications

(7 citation statements)

References 31 publications

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“…The pattern observed in other world regions suggests that temperature is one of the most important seasonal factors controlling the biological processes within plankton populations and communities [82,83]. In this study, however, temperature and chlorophyll-a were not important dispersal predictors so that the different larval strategies seem to be mainly regulated by the strong influence of the Amazon River outflow on the water salinity and the Amazon plume expansion and retraction throughout the year.…”

Section: Discussioncontrasting

confidence: 54%

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Larval dispersal of Brachyura in the largest estuarine / marine system in the world

Lima

Butturi-Gomes

et al. 2021

Preprint

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For the first time, this study monitored six sites in a wide transect with approximately 240 km radius on the Amazon Continental Shelf (ACS) every three months. The objective was to analyze the larval composition of Brachyura, its abundance in shallow/subsurface and oblique hauls, the extent of larval dispersion related to the estuary/plume, and to predict the probability of occurrence and abundance for the temperature, salinity, and chlorophyll- a profiles of the water column. A total of 17,759 identified larvae are distributed in 8 families and 25 taxa. The water salinity was the best predictor of larval distribution. The statistical models used indicated that Panopeidae and Portunidae larvae are more frequent and more likely to occur in shallow water layers, while Calappidae occur in deeper layers, and Grapsidae, Ocypodidae, Sesarmidae, Pinnotheridae and Leucosiidae occur similarly in both strata. The larval dispersion extent varies among families and throughout the year while the groups are distributed in different salinities along the platform. The probability of occurrence of Portunidae is higher in ocean water (> = 33.5); Grapsidae, Panopeidae, and Pinnotheridae is higher in intermediate and ocean salinity waters (25.5 to 33.5); Ocypodidae, Sesarmidae and Calappidae is higher in estuarine and intermediate salinity waters (5 to 25.5), whereas Leucosiidae, euryhaline, occur in all salinities (5 to 33.5). Furthermore, the Amazon River seasonal flow and plume movement throughout the year not only regulate the larval distribution and dispersion of estuarine species but are fundamental for the ACS species, providing the necessary nutrient input for larval development in the region plankton.

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Section: Discussioncontrasting

confidence: 54%

“…Two sets of samples were collected, horizontal and oblique haulsin each site at different coastal distances (23,53,83,158,198, and 233 km). Two zooplankton hauls were conducted: one horizontal subsurface at 0.5 m from the surface and another oblique ('V'-shaped, covering up to % of the local depth).…”

Section: Data Collectionmentioning

confidence: 99%

Larval dispersal of Brachyura in the largest estuarine / marine system in the world

Lima

Butturi-Gomes

et al. 2021

Preprint

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show abstract

“…The pattern observed in other world regions suggests that temperature is one of the most important seasonal factors controlling the biological processes within plankton populations and communities [ 82 , 83 ]. In this study, however, temperature and chlorophyll- a were not important dispersal predictors so the different larval strategies seem to be mainly regulated by the strong influence of the Amazon River outflow on the water salinity and the Amazon plume expansion and retraction throughout the year ( S4 Table ).…”

Section: Discussionmentioning

confidence: 99%

Larval dispersal of Brachyura in one of the largest estuarine/marine systems in the world

et al. 2022

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The Amazon Continental Shelf (ACS) is a complex habitat that receives a large annual freshwater discharge into the ocean, producing a superficial plume and carrying with it large amounts of nutrients to the continental shelf along thousands of kilometers while sustaining high biodiversity in the estuary–ocean continuum. For the first time, this study monitored six sites in a wide transect with approximately 240 km radius on the ACS every 2–4 months. The objectives were (1) to analyze the composition of larval Brachyuran crabs and (2) to predict the importance of environmental parameters (temperature, salinity and chlorophyll-a) in structuring their abundance. A total of 17,759 larvae identified were distributed in 8 families and 24 taxa. The water salinity was the best predictor of larval distribution. The statistical models used indicated that Panopeidae and Portunidae larvae are more frequent and more likely to occur in shallow water layers, while Calappidae occur in deeper layers, and Grapsidae, Ocypodidae, Sesarmidae, Pinnotheridae and Leucosiidae occur similarly in both strata. The larval dispersal extent varies among families and throughout the year while the groups are distributed in different salinities along the platform. The probability of occurrence of Portunidae is higher in ocean water (≥ 33.5); Grapsidae, Panopeidae, and Pinnotheridae is higher in intermediate and ocean salinity waters (25.5 to 33.5); Ocypodidae, Sesarmidae and Calappidae is higher in estuarine and intermediate salinity waters (5 to 25.5), whereas Leucosiidae, euryhaline, occur in all salinities (5 to 33.5). Furthermore, the Amazon River seasonal flow and plume movement throughout the year not only regulate the larval distribution and dispersion of estuarine species but are also fundamental for the ACS species, providing the necessary nutrient input for larval development in the region.

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“…1) from 4 June 1991 to 14 December 2017 with intervals of 10 days. This is an open bay characterised by typical environmental parameters for the northeast coast of the Black Sea (Lebedeva et al, 2003; Vinogradov et al, 2005; Vereshchaka & Anokhina, 2014, 2015, 2017a, 2017b). Under stormy conditions, which occurred mainly in the winter period, sampling was delayed 1–3 days.…”

Section: Methodsmentioning

confidence: 99%

“…1). We started with analysis of the benthopelagic and benthoneustonic fauna, have yielded regularities in diurnal dynamics of these plankton groups, and assessed environmental factors driving this dynamics (Vereshchaka & Anokhina, 2014, 2015, 2017a, 2017b). Here, we make the next step and analyse temporal variability of all plankton taxa with the focus on the holoplanktonic fauna.…”

Section: Introductionmentioning

confidence: 99%

Long-term studies reveal major environmental factors driving zooplankton dynamics and periodicities in the Black Sea coastal zooplankton

Vereshchaka

Anokhina

Lukasheva

et al. 2019

PeerJ

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Background The development and management of shelf-sea ecosystems require a holistic understanding of the factors that influence the zooplankton structure and ecosystem functions. The Black Sea is an example of such areas influenced by eutrophication, overfishing, climate variability, invasions of the ctenophores Mnemiopsis leidyi followed by Beroe ovata. Thus, there is a set of principal factors which may influence and explain periodicities in the Black Sea ecosystem. Methods We analysed a total of 918 samples taken from 1991 to 2017 with intervals of 10 days. Taxa were identified to species, their abundance and biomass were calculated. We tested 12 environmental factors, which may explain zooplankton distribution: temperature, productivity-linked factors (surface chlorophyll as a proxi), wind, turbidity, lowest winter temperature, and concentration of the ctenophore M. leidyi. We used canonical correspondence analyses to find the dominant environmental factors and further regression analyses to retrieve dependences of plankton biomass on the major factors. Periodicities were assessed with the use of the Continuous wavelet transform and tested with use of One-way ANOSIM and PERMANOVA. The distances between ecosystem states in different years were assessed using non-metric multidimensional scaling. Results Currently, temperature and productivity are the major environmental factors driving zooplankton dynamics. Not long ago, before 1999, abundance of M. leidyi was one of the major factors explaining the zooplankton variance. Spectral analysis of species abundances revealed a 4-year transitional period in 1999–2002 (not reported before) when ecosystem adapted to a new invader B. ovata. Statistically robust 2- and 3-year periodicities were retrieved for most plankton taxa and some benthic larvae. We found robust correlations between temperature and surface chlorophyll concentration on one side and plankton abundances and biomass on the other, and retrieved multivariate regressions, which may have a prognostic value.

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Composition and Dynamics of the Black Sea Benthopelagic Plankton and Its Contribution to the Near-Shore Plankton Communities

Cited by 9 publications

References 31 publications

Larval dispersal of Brachyura in the largest estuarine / marine system in the world

Larval dispersal of Brachyura in the largest estuarine / marine system in the world

Larval dispersal of Brachyura in one of the largest estuarine/marine systems in the world

Long-term studies reveal major environmental factors driving zooplankton dynamics and periodicities in the Black Sea coastal zooplankton

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