<i>Cyprideis torosa</i>: a model organism for the Ostracoda?

Lord, Alan

doi:10.1144/jmpaleo2016-100

Cited by 29 publications

(10 citation statements)

References 31 publications

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“…All species are common in the Sea of Azov, widespread C. torosa is the most common species in the Azov-Black Sea region, which is an inhabitant in it at least since the Miocene (Schornikov 1969;Dykan et al 2009;Gliozzi et al 2016). C. torosa, C. cepa and L. aestuarii are halotolerant species, the first can live up to salinity of 100 g/L, the secondup to 60 g/L and the thirdup to 45 g/L (Schornikov 1969;De Deckker & Lord 2017). L. bulgarica and L. devexa had not previously been observed in hypersaline waters.…”

Section: Resultsmentioning

confidence: 99%

Ostracods in the Plankton of the Sivash Bay (The Sea of Azov) During Its Transformation From Brackish to Hypersaline State

et al. 2017

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Bay Sivash (the Sea of Azov), the largest lagoon in Europe, demonstrates a sharp ecosystem change due to anthropogenic impact. A pronounced salinity increase occurs as a result of the decision to stop supplying Dnieper water into the North-Crimean Canal. Salinity has increased from 20–22 g/L to 55–75 g/L in the lagoon. This led to the changes of biotic composition. The authors used data on ostracod species composition and abundance in samples of 2014–2016 samples with comparison with data from samples collected in 2004, before the salinity increase. The identification of ostracod species in the Sivash Bay was first made; five species was found in 2004–2016: Cyprideis torosa (Jones, 1850), Loxoconcha bulgarica Caraion, 1960, Loxoconcha aestuarii Marinov, 1963, Cytherois cepa Klie, 1937, Leptocythere devexa Schornikov, 1966. In June and August 2004, the average ostracod abundance in plankton was 22 ind./m3 (CV = 1.506). In October 2014, the ostracod abundance in the plankton reached 210 ind./m3, and in August 2015 – average of 1273 ind./m3 (CV = 1.220). In some plankton samples, ostracods dominated in numbers and reached 3850 ind./m3. In the salinity range of 50–80 g/L, a significant positive correlation was observed between total ostracod abundance in plankton and salinity.

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Section: Resultsmentioning

confidence: 99%

Ostracods in the Plankton of the Sivash Bay (The Sea of Azov) During Its Transformation From Brackish to Hypersaline State

et al. 2017

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“…Moreover, they are easily preserved in the sedimentary archives of Pontocaspian basins, allowing the reconstruction of the palaeoenvironment they once dwelt in. A number of studies have used ostracod assemblages to redraw limnological conditions in a large spectrum of lake environments (De Deckker and Forester, 1988;Martens, 1994;Boomer et al, 1996;Horne et al, 2002;De Deckker and Lord, 2017;Alivernini et al, 2018;Rausch and Stoica, 2019). The Denizli Basin in SW Anatolia (Turkey) ( Fig.…”

Section: Introductionmentioning

confidence: 99%

A Late Miocene – Early Pliocene Paratethyan Type Ostracod Fauna From the Denizli Basin (Sw Anatolia) and Its Palaeogeographic Implications

Rausch¹,

Stoica²,

Lazarev³

2020

Actapalrom

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The upper Miocenelower Pliocene sedimentary succession of the Denizli Basin (SW Anatolia) displays a unique record of undisturbed stratigraphy and provides an excellent opportunity to study long-term palaeoecological changes. This paper documents the ostracod assemblages of two sections of the Neogene Kolankaya Formation, resulting in the following taxonomic, palaeobiogeographic and ecological interpretations. The ostracod assemblages from the two sections consist of a mixture of oligohaline to mesohaline tolerant taxa but expose fundamental differences in their composition. This is reflected by the fact that out of 32 determined species, both sections only have 3 in common. In the stratigraphic older succession, the diverse ostracod fauna resembles taxa known from the Paratethys. Faunal relations to the brackish lake habitats of the Euxinic and Pannonian basins are apparent and the palaeobiogeographic significance of the fauna is discussed. The ostracod association of the younger section indicates a low brackish water habitat with fluctuating salinities, most likely in the oligohaline range. The ostracod assemblage of the Kolankaya Formation only permits a broad age assignment to the late Mioceneearly Pliocene.

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“…However, other factors, not necessarily salinity-related, such as increased inorganic carbonate precipitation and mineralogy, water temperature, Mg concentration and/or alkalinity of the ambient water may also affect Sr / Ca and Mg / Ca ratios of ostracod valves (e.g. Engstrom and Nelson, 1991;De Deckker et al, 1999;Bahr et al, 2009;Zhang et al, 2009;Gouramanis and De Deckker, 2010). The oxygen isotope composition (δ 18 O) of ostracod valves is a function of the temperature and the isotopic composition of the lake water in which the biominerals were secreted, modified by a vital offset, a systematic, species-specific deviation from the δ 18 O value of a theoretical calcite precipitated under equilibrium conditions (von Grafenstein et al, 1999.…”

Section: Introductionmentioning

confidence: 99%

Ostracods as ecological and isotopic indicators of lake water salinity changes: the Lake Van example

et al. 2019

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Abstract. Ostracods are common lacustrine calcitic microfossils. Their faunal assemblage and morphological characteristics are important ecological proxies, and their valves are archives of geochemical information related to palaeoclimatic and palaeohydrological changes. In an attempt to assess ostracod ecology (taxonomic diversity and valve morphology) combined with valve geochemistry (δ18O and δ13C) as palaeosalinity indicators, we analysed sedimentary material from the International Continental Scientific Drilling Program (ICDP) Ahlat Ridge site from a terminal and alkaline lake, Lake Van (Turkey), covering the last 150 kyr. Despite a low species diversity, the ostracod faunal assemblage reacted sensitively to changes in the concentration of total dissolved salts in their aquatic environment. Limnocythere inopinata is present throughout the studied interval, while Limnocythere sp. A is restricted to the Last Glacial period and related to increased lake water salinity and alkalinity. The presence of species belonging to the genus Candona is limited to periods of lower salinity. Valves of Limnocytherinae species (incl. L. inopinata) display nodes (hollow protrusions) during intervals of increased salinity. Both the number of noded valves and the number of nodes per valve appear to increase with rising salinity, suggesting that node formation is related to hydrological changes (salinity and/or alkalinity). In contrast to Lake Van's bulk δ18O record, the δ18O values of ostracod valves do record relative changes of the lake volume, with lower values during high lake level periods. The δ13C values of different species reflect ostracod habitat preferences (i.e. infaunal vs. epifaunal) but are less sensitive to hydrological changes. However, combined with other proxies, decreasing Holocene δ13C values may indicate a freshening of the lake water compared to the low lake level during the Last Glacial period. The Lake Van example underscores the significance and value of coupling ostracod ecology and valve geochemistry in palaeoenvironmental studies of endorheic lake basins.

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Cyprideis torosa: a model organism for the Ostracoda?

Cited by 29 publications

References 31 publications

Ostracods in the Plankton of the Sivash Bay (The Sea of Azov) During Its Transformation From Brackish to Hypersaline State

Ostracods in the Plankton of the Sivash Bay (The Sea of Azov) During Its Transformation From Brackish to Hypersaline State

A Late Miocene – Early Pliocene Paratethyan Type Ostracod Fauna From the Denizli Basin (Sw Anatolia) and Its Palaeogeographic Implications

Ostracods as ecological and isotopic indicators of lake water salinity changes: the Lake Van example

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