关键词: 根田鼠, 局部实验增温, 斑块效应, 放牧强度, 捕获频次, 栖息地利用

Abstract: To discuss the influence of patch effect of locally experimental warming (EW) on root voles'habitat choice , using topopen chambers (TOC) to simulate global warming , the root vole's captured frequencies in 4 treatments in different grazing-intensityplots were investigated by mark-recapture method. The four treatments included EW, cut grass similating grazing (CUT) , EW &CUT (EWC) , and control (CK). The results showed that : (1) There was no influence of different grazing intensities on root vole's captured frequencies ( P > 0.05) , but among 4 treatments in High Grazing Meadow (HGM) , the differences were significantduring both warm or cold seasons ( P < 0.05) . In Low Grazing Meadow (LGM) , it was not significant in warm season ( P >0.05) , however , it was evident during cold one ( P < 0.05) . (2) There were no significant influence of the ulterior effect ofwarming chambers foundation on habitat selection of root vole , cut grass treatment on habitat choice of root vole had also no effect.In warm season , Locally experimental warming (LEW) had no effect on root vole's habitat choice ( P > 0.05) ; In cold season ,there were significant difference of EW and CK ( P < 0.05) , but EWC and CUT had no difference. The results indicated thatLEW had no influence on root vole's habitat choice in warm season. In cold season , this effect was significant between EW andCK, but it was not significant between EWC and CUT.

Key words: Root vole (Microtus oeconomus), Locally experimental warming, Patch effect, Grazing intensity, Captured frequencies, Habitat utilization