- Palaeartic gastropod gains a foothold in the dominion of endemics: range expansion and morphological change of Lymnaea (Radix) auricularia in Lake Baikal
- Volume | Issue number
- 513 | 1-3
- Pages (from-to)
- Number of pages
- Document type
- Faculty of Science (FNWI)
- Institute for Biodiversity and Ecosystem Dynamics (IBED)
In and around the endemic-dominated Lake Baikal, palaearctic species are generally restricted to shallow, sheltered bays and in- and out-flowing river floodplains. However, we observed populations of the palaearctic snail Lymnaea (Radix) auricularia on the steep, rocky littoral of Lake Baikal proper. We compared the morphology of 542 shells sampled from this new habitat with potential source populations from conventional habitats. A size-free Discriminant Analysis indicated a strong morphological differentiation of the newly established populations from their likely sources. The new populations had a more compact shell shape with a wide aperture, which may be advantageous in wave-exposed habitats where a firm attachment to the substrate is needed. Shells from the conventional habitats were more elongated, with a narrow aperture, which may be advantageous in habitats that have a dry period where retreating into the mud is required and water loss should be limited. These results may suggest that selection is acting on shell shape in Lake Baikal. The apparent recent arrival of this pandemic gastropod in a habitat previously dominated by endemics constitutes a potential ecological threat and an alert to possible ecological change.
- go to publisher's site
If you believe that digital publication of certain material infringes any of your rights or (privacy) interests, please let the Library know, stating your reasons. In case of a legitimate complaint, the Library will make the material inaccessible and/or remove it from the website. Please Ask the Library, or send a letter to: Library of the University of Amsterdam, Secretariat, Singel 425, 1012 WP Amsterdam, The Netherlands. You will be contacted as soon as possible.