[Phenotypic diversity in continuous and discrete populations exemplified by the bank vole under the conditions of the southern taiga].
Variation of 6 bilateral quantitative and 32 nonmetric skull traits of the bank vole (Clethrionomys glareolus Schreb.) was studied in two types of population. Continual one is represented by a large population continuously distributed in main part of the Central Forest Reserve. Discrete type (corresponding to classical one-dimensional "step model") is represented by population fragmented into a set of small subunits by landscape barriers. Territories covered, biotopic diversity and time of existence are similar in the both cases. General level of phenotypic diversity (both within and among individuals) appeared to be higher in the fragmented population. This is caused probably by increase of stochastic variation due to disturbance of the developmental stability in isolated subpopulations. This indicates that, besides concepts of population genetics, models of insular ecology should be used for understanding microevolutionary processes that take place under fragmentation of habitats. Different patterns should be anticipated for the species reacting specifically on various isolation characteristics.
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D000818:Animals; D003411:Arvicolinae / Q000235:genetics*; D005075:Biological Evolution; D004463:Ecology; D014644:Genetic Variation / Q000235:genetics*; D005828:Genetics, Population; D010641:Phenotype; D012426:Russia; D013269:Stochastic Processes
Fenotipicheskoe raznoobrazie kontinual'noĭ i diskretnoĭ populiatsiĭ na primere ryzheĭ polevki v usloviiakh iuzhnoĭ taĭgi.