On morphological and ecological evidence of adaptive differentiation among stony cliff littoral Baikal gastropods
| Autor: | N. V. Maximova, Tatyana Sitnikova |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
0106 biological sciences
Canyon geography Caenogastropoda geography.geographical_feature_category biology Ecotype Ecology 010604 marine biology & hydrobiology Maackia herderiana Morpho biology.organism_classification 010603 evolutionary biology 01 natural sciences Littoral zone Cliff Ecology Evolution Behavior and Systematics Baicaliidae |
| Zdroj: | Journal of Natural History. 50:263-280 |
| ISSN: | 1464-5262 0022-2933 |
| Popis: | Three morpho- or ecotypes (‘ribbed’, ‘middle’ or ‘ribless’ shell and ‘smooth’) of lithophilous Maackia herderiana (Lindholm, 1909) (Caenogastropoda: Baicaliidae) were investigated along the hydrodynamic zones of four locations on the southwestern littoral of Lake Baikal in southeast Siberia. We found a prevalence of the ribbed-shell morphotype inhabiting stones at a depth of 1.2–2.0 m, corresponding to the hydrodynamic zone of strong wave activity, and a predominance of the smooth-shell morphotype living on cliffy canyons at 21–31 m depth in the hydrodynamic zone where wave action is very weak or totally absent. Mixed groups of snails with ribbed, ribless and/or smooth shells were present on stony-boulder substrates at 3 to 15–19 m depth of the wave-cut and wave-weakening hydrodynamic zones. Ribbed-morphotype snails living in inshore and wave-cut hydrodynamic zones had a smaller shell size than did smooth-morphotype snails inhabiting zones where wave activity was weak or totally absent. The thickn... |
| Databáze: | OpenAIRE |
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