The first records of Corbicula clams (Bivalvia, Corbiculidae) in Northern European Russia: main causes and possible consequences, genetic and shell morphological discrepancies

Lead Author Yulia, Bespalaya
Institution Contact Institute of Ecological Problems of the North, Ural Branch of Russian Academy of Sciences, Severnaya Dvina Emb. 23, 163000 Arkhangelsk, Russian Federation
Co-Authors Ivan Bolotov, Institute of Ecological Problems of the North, Ural Branch of Russian Academy of Sciences, Russian Federation Olga Aksenova, Institute of Ecological Problems of the North, Ural Branch of Russian Academy of Sciences, Russian Federation Alexander Kondakov Institute of Ecological Problems of the North, Ural Branch of Russian Academy of Sciences, Russian Federation
Theme Theme 1: Vulnerability of Arctic Environments
Session Name 1.7 Invasive species in Arctic ecosystems in the changing world: Is it a real threat?
Datetime Wed, Sep 14, 2016 10:50 AM - 11:05 AM
Presentation Type Oral
Abstract text Biological invasions are a serious threat to environmental protection and the con-servation of biological diversity (Oliveira et al., 2015).
It is known that the proportion of alien species is lower in Polar Regions than it is elsewhere (Alsos et al., 2015), however increased human activity and climate change are expected to increase the numbers and the impact of alien species in the Arctic (Alsos et al., 2015). According to some authors Corbicula clams can be found in northern regions in waters that are heated by thermal power plant (Karataev et al., 2007; Vinarsky et al., 2015). In accordance with this, in 2015 the Corbicula spp. was found for the first time in Arkhangelsk thermal power plant in Northern European Russia.
Total DNA was extracted from the foot tissues according to standard phenol/chloroform procedures (Sambrook et al., 1989). The mitochondrial genes (COI) and large ribosomal subunit rRNA gene (16S) sequences were obtained from 18 specimens. Among the dis-covered patterns of Corbicula clams, we can differentiate two morphs visually: morph-1 (light form, Rlc) and morph-2 (round form, R).They correspond to the forms described by Pfenninger et al. (2000) and Marescaux et al. (2010). The two haplotypes were detected in specimens of Corbicula clams. It was established that the individuals having the mor-photype R exhibited the COI haplotype 2 (found in form S) and the individuals having the morphotype Rls exhibited the COI haplotype 1 (found in form R). The same results were obtained for 16S haplotypes.
It is hypothesized that mitochondrial and morphology mismatches are resulting from an-drogenetic mitochondrial capture, which are often detected at some of the locations where different lineages occur in sympatry (Hedtke et al., 2008; Pigneur et al., 2011).
This study has been supported by the Russian Foundation for Basic Research (project numbers: 16-05-00854, 14-04-98801 and 15-04-05638).
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