title: [The ecology of the sibling species Microtus arvalis Pallas, 1779 and Microtus rossiaemeridionalis Ognev, 1924 (Rodentia, Cricetidae) in the Tsimlianskie sands].
abstract: Ecological features and circadian activity of the common vole sibling species were studied upon joint and separate occurrences. Both species had a similar abundance but different biotopical distribution. Microtus arvalis--chromosome form "obscurus" populated the studied territory more uniformly the studied territory. M. rossiaemeridionalis tended to occur in humid coenoses. In case of joint occurrences, the sibling species occupied different regions of biotopes and the rhythms of their activity change, as a rule, in antiphase. Separation of the spatial and temporal niches of these species is considered as possible avoidance of competition between the closely related species.
authors.affiliation: Severtsov Institute for Problems of Ecology and Evolution, Russian Academy of Sciences, Moscow, Russia.
authors.forename: G N
authors.initials: GN
authors.lastname: Tikhonova
authors.forename: I A
authors.initials: IA
authors.lastname: Tikhonov
authors.forename: P L
authors.initials: PL
authors.lastname: Bogomolov
authors.forename: L V
authors.initials: LV
authors.lastname: Poliakova
mesh_terms: D000818:Animals; D003411:Arvicolinae / Q000502:physiology*; D001522:Behavior, Animal / Q000502:physiology; D002940:Circadian Rhythm / Q000502:physiology; D003163:Competitive Behavior / Q000502:physiology; D017753:Ecosystem; D011156:Population Density; D012426:Russia; D013045:Species Specificity
vernacular_title: K voprosu ob ékologii vidov-dvoĭnikov Microtus arvalis Pallas, 1779 i Microtus rossiaemeridionalis Ognev, 1924 (Rodentia, Cricetidae) v Tsimlianskikh peskakh.