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2 Polish Journal of Ecology

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Opposite-sex sibling recognition in adult root vole, Microtus oeconomus Pallas : phenotype matching or association?

Sun P., Zhu W., Zhao X.

Polish Journal of Ecology

2008

Vol. 56, nr 4

701-708

Hypothesis of phenotype matching and association are the most likely mechanisms in kin recognition. These hypotheses were tested by observing behavioral responses of cross-fostered root voles to urine cues from familiar and unfamiliar kin and non-kin. In experiment I, approach latency by males was significantly longer in response to non-sibling reared together (NSRT) than to non-sibling reared apart (NSRA) females, whereas, investigatory and sniffing time were significantly less in response to NSRT than to NSRA. However females showed no event bias to odors from NSRT and NSRA males. In experiment II, the behavioral responses of males and females to urine odors from siblings reared apart (SRA) and NSRA were not related to the degree of genetic relationship. It was concluded that: Association mechanism is used by male root voles in opposite-sex sibling recognition; Female voles possibly adopt multiple recognition mechanisms in different social tests.

Effect of burrowing activity of root vole (Microtus oeconomus Pallas) on plant diversity in alpine meadow

Sun P., Zhao X., Zhu W., Xu S.

Polish Journal of Ecology

2005

Vol. 53, nr 4

597-602

Herbivory and burrowing activity of mammals may influence the species composition and diversity of plant communities. The effect of corridors and holes systems constructed by root vole (Microtus oeconomus Pallas) on the plant species diversity was studied in the habitat of high - mountain meadow (3250 m a.s.l in Qinghai-Tibet Plateau, China). By using grid method, these disturbances were studied on 16 plots (100 cm x 100 cm) distributed in 4 transects in studied area, in August 2000 and 2001.The disturbance intensity index, D, was calculated as the percent of the ground surface disturbed by voles in the study area. Plant species were identified and counted on the same plots. In total 46 plant species were identified - 39% of this number was considered as sensitive to the vole disturbances as their occurrence and/or abundance decreased along the disturbance intensity. Generally, a significantly negative correlation (r = - 0.911, P < 0.01) between vole aboveground disturbances and plant species diversity (H') was found. The results suggest that root vole ground disturbances, especially in the form of actively utilized holes and corridors have significantly negative influence on plant species diversity in high-mountain grassland habitat.