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  Mollusc biodiversity in late Holocene nearshore environments of the Caspian Sea: A baseline for the current biodiversity crisis

van de Velde, S., Wesselingh, F. P., Yanina, T. A., Anistratenko, V. V., Neubauer, T. A., ter Poorten, J. J., et al. (2019). Mollusc biodiversity in late Holocene nearshore environments of the Caspian Sea: A baseline for the current biodiversity crisis. Palaeogeography, Palaeoclimatology, Palaeoecology, 535: 109364. doi:10.1016/j.palaeo.2019.109364.

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 Creators:
van de Velde, Sabrina1, Author
Wesselingh, Frank P.1, Author
Yanina, Tamara A.1, Author
Anistratenko, Vitaliy V.1, Author
Neubauer, Thomas A.1, Author
ter Poorten, Jan Johan1, Author
Vonhof, Hubert B.2, Author           
Kroonenberg, Salomon B.1, Author
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1external, ou_persistent22              
2Climate Geochemistry, Max Planck Institute for Chemistry, Max Planck Society, ou_2237635              

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 Abstract: The Caspian Sea is an evolutionary island whose rich and endemic fauna have evolved in partial isolation over the past two million years. Baseline studies of pre-20th Century communities are needed in order to assess the severity of the current Caspian biodiversity crisis, which mostly involves invasive species. An inventory of late Holocene shelly assemblages (c. 2000-2500 cal yr BP) from outcrops in and around Great Turali Lake (Dagestan, Russia) shows a diverse nearshore community consisting of 24 endemic Caspian species, two invasive species and two Caspian native species that lived in a shallow embayment with mesohaline salinities of circa 5-13 psu (parts per thousands). This pre-crisis Holocene Caspian mollusc community serves as a baseline against which modern mollusc diversity measurements can be evaluated. Examination of faunas from similar environments living today and in the past illustrates the dramatic changes in nearshore communities during the 20th Century. Our study identifies a habitat that may have served as a refuge, but that is currently under threat from invasive species. The severity of the Caspian biodiversity crisis is comparable with other well-known biodiversity crises in semi-isolated ecosystems such as the cichlid fish communities of Lake Victoria, Africa.

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 Dates: 2019
 Publication Status: Published online
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Title: Palaeogeography, Palaeoclimatology, Palaeoecology
Source Genre: Journal
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Publ. Info: Amsterdam : Elsevier
Pages: - Volume / Issue: 535 Sequence Number: 109364 Start / End Page: - Identifier: ISSN: 0031-0182
CoNE: https://pure.mpg.de/cone/journals/resource/954925431351