Coupled biotopic variation in populations of sympatric rodent species in the Southern Urals

Coupled biotopic variation in populations of sympatric rodent species in the Southern Urals Using geometric morphometric methods, coupled biotopic variation in the shape of the mandible was revealed in cenopopulations of two sympatric rodent species, the pygmy wood mouse (Sylvaemus uralensis Pall., 1811) and bank vole (Myodes glareolus Schreb., 1780), in the Southern Urals. As a rule, heterospecific pairs from syntopic samples synchronously taken in cenopopulations of the two species inhabiting contrasting local biotopes displayed similar (parallel and unidirectional) morphological changes. In an unusually arid year, however, differently directed morphogenetic responses were revealed in young of the year from cenopopulations of the two species in broadleaf forest outliers surrounded by steppe vegetation on tops of the Guberlya low hills. Such a local disturbance of the coupled pattern of biotopic variation in S. uralensis and M. glareolus cenopopulations under ambient conditions sharply deviating from the optimum may be evidence for depletion of their coevolutionary adaptive potential, which is estimated from the range of ecological conditions at which parallelism in the variation of sympatric species is observed. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Russian Journal of Ecology Springer Journals

Coupled biotopic variation in populations of sympatric rodent species in the Southern Urals

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Publisher
Pleiades Publishing
Copyright
Copyright © 2015 by Pleiades Publishing, Ltd.
Subject
Life Sciences; Ecology; Environment, general
ISSN
1067-4136
eISSN
1608-3334
D.O.I.
10.1134/S1067413615040037
Publisher site
See Article on Publisher Site

Abstract

Using geometric morphometric methods, coupled biotopic variation in the shape of the mandible was revealed in cenopopulations of two sympatric rodent species, the pygmy wood mouse (Sylvaemus uralensis Pall., 1811) and bank vole (Myodes glareolus Schreb., 1780), in the Southern Urals. As a rule, heterospecific pairs from syntopic samples synchronously taken in cenopopulations of the two species inhabiting contrasting local biotopes displayed similar (parallel and unidirectional) morphological changes. In an unusually arid year, however, differently directed morphogenetic responses were revealed in young of the year from cenopopulations of the two species in broadleaf forest outliers surrounded by steppe vegetation on tops of the Guberlya low hills. Such a local disturbance of the coupled pattern of biotopic variation in S. uralensis and M. glareolus cenopopulations under ambient conditions sharply deviating from the optimum may be evidence for depletion of their coevolutionary adaptive potential, which is estimated from the range of ecological conditions at which parallelism in the variation of sympatric species is observed.

Journal

Russian Journal of EcologySpringer Journals

Published: Jul 17, 2015

References

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