The political decision caused the drastic ecosystem shift of the Sivash Bay (the Sea of Azov)

Shadrin, Nickolai; Anufriieva, Elena; Kipriyanova, L. M.; Колесникова, Е. А.; Latushkin, Alexandr A.; Romanov, Roman E.; Сергеева, Н. Г.

doi:10.1016/j.quaint.2017.12.009

Cited by 27 publications

(60 citation statements)

References 17 publications

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“…Bay Sivash is the largest lagoon in Europe; the narrow sand Arabat Spit of 112–116 km long separates it from the Sea of Azov, and only two narrow straits connect the lagoon with the sea on the north (Figure ). The bay area covers about 2,560 km 2 , and maximum depth does not exceed 2 m in the shallow semi‐closed hypersaline lagoon (Shadrin et al, ; Vorobyev, ). The North Crimean Canal was constructed in 1963–1975 to supply freshwater for arid areas of the Crimea, which is the largest peninsula in the Black Sea.…”

Section: Methodsmentioning

confidence: 99%

“…Salinity gradually decreased; the average salinity of the bay in 1955 was 141 g/L, in 1972 it was 47 g/L, in 1975–1980 it was 30–35 g/L, and in 1997–2013 it was 17–21 g/L (Dyakov, Belogudov, & Timoshenko, ; Shadrin et al, ). In 2015, salinity fluctuated between 28 and 75 g/L decreasing from south to north (Shadrin et al, ). Filamentous green algae Cladophora siwaschensis (C.J.…”

Section: Methodsmentioning

confidence: 99%

“…Before construction of the North Crimean Canal (1963–1975), Bay Sivash (The Sea of Azov) was a shallow semi‐closed hypersaline lagoon (average salinity of 140 g/L, in the southern part up to >200 g/L) with high biological productivity and containing one of the largest populations of Artemia sp. in the world (Shadrin et al, ; Vorobyev, ; Voronov, ). The North Crimean Canal activity changed everything in the lagoon and surrounding area (Shadrin et al, ).…”

Section: Introductionmentioning

confidence: 99%

“…in the world (Shadrin et al, ; Vorobyev, ; Voronov, ). The North Crimean Canal activity changed everything in the lagoon and surrounding area (Shadrin et al, ). Freshwater from the Dnieper River began to flow into the canal and was used for irrigation; drainage water from irrigated cropland began to discharge into the lagoon.…”

Section: Introductionmentioning

confidence: 99%

“…The result of this was that the average salinity in the bay dropped to between 17.0 and 22.6 g/L from 1989 to 1997. Changes in biotic composition occurred, and a new different brackish water ecosystem formed (Shadrin et al, ). Many fish had come into the bay from the Sea of Azov (Voronov, ).…”

Section: Introductionmentioning

confidence: 99%

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The long‐term changes in plankton composition: Is Bay Sivash transforming back into one of the world's largest habitats ofArtemiasp. (Crustacea, Anostraca)?

Anufriieva

Shadrin

2019

Aquac Res

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Bay Sivash was a hypersaline lagoon but after construction of the North Crimean canal, it shifted to a brackish water state. In 2014, the canal was closed; a salinity increase started. In 2018 and 2019, plankton sampling was conducted in the bay at salinity from 30 to 100 g/L. A decrease in taxonomic diversity and total abundance was observed. Before November of 2018, Harpacticoida and chironomid larvae were the most common and abundant groups. Different stages of Artemia were consumed by invertebrate predators and fish at that time. In November 2018, Artemia stages contributed more than 90% to total zooplankton abundance at all sites excepting with salinity lower than 55 g/L. In June–July 2019, adult Artemia were at all sites with salinity higher than 82 g/L when there was no suppression by predators. A self‐sustaining Artemia population in the bay may recover in 2 or 3 years, when the average salinity would reach 80–90 g/L; total abundance of the active Artemia stages may reach 3000–5000 ind. M−3 between April and August. The lagoon may become one of the world main habitats of Artemia having a significant impact to provide world's supply by its cysts.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

The long‐term changes in plankton composition: Is Bay Sivash transforming back into one of the world's largest habitats ofArtemiasp. (Crustacea, Anostraca)?

Anufriieva

Shadrin

2019

Aquac Res

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Suppression of Artemia spp. (Crustacea, Anostraca) populations by predators in the Crimean hypersaline lakes: A review of the evidence

Shadrin

Yakovenko

Anufriieva

2019

Internat Rev Hydrobiol

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Artemia spp. play a key role in hypersaline ecosystems. Artemia can live in a salinity range from 10 to 300-340 g/L, but in water bodies where salinity is between 10 and 100 g/L, it may be absent. Is the absence of Artemia in some Crimean lakes determined by the presence of predators or by salinity? To answer this question field long-term and experimental data collected in the Crimean lakes were used. With the least probability, the populations of Artemia existed in the lakes with a salinity of up to 50 g/L or above 300 g/L. Self-reproducing Artemia populations (all age stages) were most likely (≥80% of occurrence) noted in the salinity range of 150-200 g/L. Longterm monitoring in two lakes showed that in different years, a significant negative correlation of Artemia abundance with the numbers of amphipod Gammarus aequicauda and ostracod Eucypris mareotica was found in both lakes. This correlation can be explained by ostracod and amphipod predation on Artemia. In years without predator populations, the number of Artemia was higher by several times.Experiments showed that these amphipods and ostracods consume brine shrimps of different developmental stages. There are at least 12 crustacean species, 5 insect species, and 2 fish species, all listed in this paper, which inhabit Crimean hypersaline waters and can eat Artemia. Their predation on Artemia often is a main cause of its absence in the salinity range from 10 to 150 g/L.

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Mercury in the world’s largest hypersaline lagoon Bay Sivash, the Sea of Azov

Shadrin

Stetsiuk

Latushkin

et al. 2021

Environ Sci Pollut Res

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The political decision caused the drastic ecosystem shift of the Sivash Bay (the Sea of Azov)

Cited by 27 publications

References 17 publications

The long‐term changes in plankton composition: Is Bay Sivash transforming back into one of the world's largest habitats ofArtemiasp. (Crustacea, Anostraca)?

The long‐term changes in plankton composition: Is Bay Sivash transforming back into one of the world's largest habitats ofArtemiasp. (Crustacea, Anostraca)?

Suppression of Artemia spp. (Crustacea, Anostraca) populations by predators in the Crimean hypersaline lakes: A review of the evidence

Mercury in the world’s largest hypersaline lagoon Bay Sivash, the Sea of Azov

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