A NATURAL BASELINE STUDY OF ENDEMIC LONG-LIVED LAKE MOLLUSKS FROM THE LATE PLEISTOCENE CASPIAN SEA (SELITRENNOYE, RUSSIA) Sabrina van de Velde*1, Tamara Yanina2, Thomas A. Neubauer1,3, Frank P. Wesselingh1
Naturalis Biodiversity Center, P.O. Box 9517, 2300 RA Leiden, The Netherlands 2 Moscow State University, Faculty of Geography, Leninskie Gory, 1, 119991 Moscow, Russia 3 Department of Animal Ecology and Systematics, Justus Liebig University, Heinrich-Buff-Ring 26–32 IFZ, 35392 Giessen, Germany 1
[E-mail corresponding author:
[email protected]]
SELITRENNOYE
How big is the decline?
Preservation
To be able to quantify a possible crisis we need a mollusk diversity BASELINE: • Pre-human impact • Similar environment (temperature, climate, water level, salinity --> interglacial time period) • Well-preserved representative fauna
• Dominating color: white • Abrasion: almost none ( more research on taxonomy • More research on species diversity: • Intense sampling of recent faunas • More data from extinct faunas of various locations & palaeoenvironments & time intervals
Bivalves (13 species)
Gastropods (24 species)
Theodoxus pallasi (295) Abeskunus brusinianus (489)
Andrusovia brusinai (41)
Turricaspia andrussowi (3)
Lithoglyphus cf. naticoides (1)
Ecrobia cf. grimmi (346)
Dreissena elata (588)
Adacna minima (4678) Adacna laeviuscula (30)
Hypanis plicata (37)
Turricaspia ? dimidiata (1)
Laevicaspia caspia (302) Laevicaspia conus (1135)
Clessiniola variabilis (4876)
Bithynia sp. (juv) (4)
Turricaspia pulla (186)
Monodacna caspia (867)
Esperiana esperi (1) Turricaspia meneghiniana (248)
Didacna cristata s.l. (14)
Dreissena caspia (1620) Anisus cf. spirobis (13) Didacna subcrassa (34) Didacna emendata (37)
Laevicaspia kolesnikoviana (514)
Turricaspia ? spica (1429)
Laevicaspia cincta (177)
From: Neubauer et al (2018)
Turricaspia pullula (1) Laevicaspia vinarskii sp.n. (9)
Turricaspia lyrata (564)
Ulskia ulskii (19)
Valvata piscinalis (8) Planorbis cf. planorbis (3)
Dreissena rostriformis (105)
About the author
Acknowledgements
MSc Sabrina van de Velde has a bachelor in archaeology and in biology. Her field of expertise is palaeobiology and species conservation. She also enjoys science & communication and has been active in reaching out on social media. For PRIDE she keeps the Twitter and Instagram pages up to date.
We thank Ronald Pouwer and Marjan Helwerda (Naturalis Biodiversity Center, Leiden) for assistance in sample sorting. The study was supported by the PRIDE programme: “Pontocaspian RIse and Demise”, an EU Horizon-2020 Innovative Training Network 2015-2019. PRIDE has received funding from the European Union’s Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie grant agreement No 642973.
Didacna subcatillus (1888)
Didacna spec A (27)
Didacna subpyramidata (10)
PRIDE-RCMNS Conference “Ecosystem isolation and connection: rise and demise of biota in the Pontocaspian-Caucasian region” Georgian National Museum Tbilisi (Georgia), 26-29 August 2018
