Long-term Changes in Sevastopol Bay (the Black Sea) with Particular Reference to the Ichthyoplankton and Zooplankton

Гордина, А. Д.; Pavlova, E. V.; Ovsyany, E. I.; Wilson, James G.; Кемп, Р. Б.; Romanov, Alexander S.

doi:10.1006/ecss.2000.0662

Cited by 35 publications

(23 citation statements)

References 6 publications

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“…Work on other groups (e.g. meroplankton, Gordina et al, 2001), suggested that the conditions in Sevastopol Bay and the Southern Bay had not measurably improved since the 1970s and that in fact the situation had continued to decline. However, they did note that the recent conditions outside Sevastopol Bay (which was further cut off from the open Black Sea by the construction of barriers across the entrance in the 1970s) were very much better than inside and that there was some evidence that the exterior was acting as a source of larvae for the benthic macrofauna populations within (Gordina et al, 2001).…”

Section: Discussionmentioning

confidence: 97%

“…Within Sevastopol Bay, the list is further restricted, firstly by depth and available habitat, and secondly by the supply and the survival of the meroplanktonic larvae (Gordina et al, 2001). The latter is linked to the hydrographics of the Bay and to the pollution status, both of which vary from station to station (Gordina et al, 2001).…”

Section: Introductionmentioning

confidence: 99%

“…High concentrations of organic matter in parts of Sevastopol Bay have facilitated the accumulation of hydrocarbons and also the induction of periodic anoxic events (Osadchaya et al, 2003). Monitoring of the plankton of Sevastopol Bay has suggested that these impacts have been established for several decades and that the quality status of the Bay waters is, if anything, still declining (Gordina et al, 2001).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Long-term changes in the status of Sevastopol Bay and the Crimean coast: anthropogenic and climatic influences

Wilson¹,

Osadchaya

Alyomov

2008

Hydrobiologia

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The Black Sea as a whole is subject to considerable anthropogenic and natural pressures, and these can be intensified in enclosed Bays such as those around the city of Sevastopol. The overall biological status of Sevastopol Bay has improved considerably in the last 30 years or so. The number of macrobenthic species in the Bay has increased from just over 20 in 1973 to around 70 in 2000, and there have been similar enrichments in abundance, in biomass and in diversity (H 0 ). The same pattern is shown in other locations such as the Southern Bay (the most highly polluted of the embayments) from which macrofauna were completely absent in 1976 and 1982. Over the same period oil hydrocarbons in sediments of the Southern Bay have actually increased from 8760 mg kg -1 in 1976 to 12,020 mg kg -1 in 2002, while the levels in the open sea sediments have decreased slightly over the same period (450 mg kg -1 and 280 mg kg -1 , respectively). Moreover, this pattern of biological improvement is also seen outside the Bay, suggesting a common factor in the changes. Since the effect of the local factors (i.e. pollution) can be readily seen in the gradient of biological response among sites, yet they have not significantly changed over the period of study, the overall improvement must involve some over-arching driver such as climatic influences. This point is discussed further in relation to the wider changes in the Black Sea system.

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Section: Discussionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Long-term changes in the status of Sevastopol Bay and the Crimean coast: anthropogenic and climatic influences

Wilson¹,

Osadchaya

Alyomov

2008

Hydrobiologia

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“…The larval phase is regarded as one of the most critical phases in fish lifecycles (Miller and Kendall, 2009), and particularly sensitive to environmental conditions (Ramos et al, 2006), including pollution (Longwell et al, 1992;Gordina et al, 2001;Westernhagen et al, 2001). This study explored this high sensitivity of fish larvae by testing their use in the assessment of estuarine ecosystem health.…”

Section: Discussionmentioning

confidence: 99%

“…The use of indicators of ecosystem integrity relies on their accuracy and sensitivity to anthropogenic pressures impacting on a particular water body. Early larval stages of fishes show a high vulnerability to environmental shifts (Ramos et al, 2006(Ramos et al, , 2009 and importance as pollution indicators (Longwell et al, 1992;Gordina et al, 2001;Westernhagen et al, 2001). As such, embryo-larval stages of fishes have been extensively used in toxicity tests, due to their higher sensitivity than adults to toxicants (McKim, 1977).…”

Section: Introductionmentioning

confidence: 99%

Do fish larvae have advantages over adults and other components for assessing estuarine ecological quality?

Ramos

Cabral

Elliott

2015

Ecological Indicators

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Effects of Beroe cf ovata on gelatinous and other zooplankton along the Bulgarian Black Sea Coast

Kamburska¹

Aquatic Invasions in the Black, Caspian, and Mediterranean Seas

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This paper focuses on the summer dynamics of two jelly-plankton species, Mnemiopsis leidyi and Aurelia aurita, and on the crustacean mesozooplankton after the invasion of the Black Sea by the ctenophore Beroe cf ovata. We found signifi cant fluctuations in temporal and spatial distribution of both components. During the period 1998-2001, the maximum abundance of B. cf ovata was 13 ind. m -3 . Mnemiopsis was in a range between 2-112 ind. m -3 , but did not occur at all in 1999. Aurelia was generally present in low numbers, between 1-5 ind. m -3 . In September 2000, and August 2001, Beroe was not found in the area, which prompted a relatively high Mnemiopsis abundance, but lower than in the period preceding the Beroe invasion (1994)(1995)(1996). The average number and biomass of mesozooplankton in the coastal region varied widely, from 1420 ind. m -3 to 19,990 ind. m -3 , and from 33 mg m -3 to 227 mg m -3 . Offshore, both variables fl uctuated between 1535-5680 ind. m -3 , and between 40 -132 mg m -3 . The lowest mesozooplankton data inshore were recorded in 1998 and 2000. Maximum mesozooplankton stock (44850 ind. m -3 ) was recorded in summer 1999. As regards mesozooplankton taxonomic composition, the highest species number off Cape Galata (23 species) was recorded in 1999, with the occurrence of copepod species such as Centropages kroyeri, Pontella mediterranea and Anomalocera patersoni. The lowest species number occurred in summer 1998. Despite a relatively low average zooplankton abundance and biomass in summer 2000 and 2001, the number of copepod species in the zooplankton was as high as in 1999. A PCA analysis indicated that temperature and both ctenophores contribute to the discrimination between years. With respect to Mnemiopsis density, the years 1998, 2000, 2001 are classified as "normal" and 1999 as "poor". In spite of great inter-annual variability, Mnemiopsis remains a key factor, with the highest load and contribution to mesozooplankton fluctuations, especially in summer. Our results characterize the postinvasion period, 1998-2001, as transitional, with zooplankton performance still adjusting to the ctenophore prey-predator couple. 137 H. Dumont et al. (eds.), 137-154.

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Long-term Changes in Sevastopol Bay (the Black Sea) with Particular Reference to the Ichthyoplankton and Zooplankton

Cited by 35 publications

References 6 publications

Long-term changes in the status of Sevastopol Bay and the Crimean coast: anthropogenic and climatic influences

Long-term changes in the status of Sevastopol Bay and the Crimean coast: anthropogenic and climatic influences

Do fish larvae have advantages over adults and other components for assessing estuarine ecological quality?

Effects of Beroe cf ovata on gelatinous and other zooplankton along the Bulgarian Black Sea Coast

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