根田鼠栖息地选择的影响因素
Factors Influencing Habitat Selection of Root Voles (Microtus oeconomus)
查看参考文献40篇
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文摘
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2002年7～9月在中国科学院海北高寒草甸生态系统定位站地区对根田鼠的栖息地选择进行了研究.对根田鼠栖息地利用强度变量(一定面积内的跑道长度、跑道分叉数、洞口数)与12个栖息地特征变量进行多元线性逐步回归分析表明:显著影响跑道长度的变量为灌丛高度、竞争性啮齿类、电线杆、早熟禾、围栏、灌丛间距和双子叶植物生物量;显著影响跑道分叉数的变量为灌丛高度、竞争性啮齿类、电线杆、早熟禾和围栏;显著影响洞口数的变量为灌丛高度、土壤含水率和围栏.对影响利用强度变量的因素进行综合生态学分析表明,在小生境尺度上,研究期间影响根田鼠栖息地选择的因素主要为捕食风险和种间竞争,食物资源和土壤硬度也有一定程度的影响. |
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其他语种文摘
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We studied habitat selection of root voles (Microtus oecorwmus) at Haibei Alpine Meadow Ecosystem Research Station, the Chinese Academy of Sciences, July - September 2002. Stepwise regression indicated that shrub height, dicotyledon biomass, number of competing rodent species, Poa density, and distances from power line poles, pasture fences, and shrubs significantly influenced runway length. Significant factors influencing nanway branch number were shrub height, number of competing rodent species, Poa density, and distances from power line poles, and pasture fences. Factors significantly influencing burrow number were shrub height, soil moisture, and distance from pasture fences. The influences of most habitat variables on vole habitat selec-tion were directly or indirectly related to interspecific competition and predation risk. Risk of predation increased and habitat utili-zation decreased with decreased shrub height and Poa dominance, and with increased proximity of pasture fences and power lines. The presence of plateau pikas ( Ochatona cunoniae) resulted in increased habitat openness, thus increased risk of predalion and decreased habitat utilization by root voles. Overall, at a microhabitat scale, risk of predation and inter-specific competition were the main factors which influenced habitat selection by root voles during the study period. |
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来源
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兽类学报
,2005,25(1):45-51 【核心库】
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关键词
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根田鼠
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栖息地选择
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捕食风险
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种间竞争
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地址
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1.
中国科学院西北高原生物研究所, 青海, 西宁, 810008
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中国科学院动物研究所, 北京, 100080
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1000-1050 |
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学科
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动物学 |
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基金
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中国科学院西部之光人才培养计划
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文献收藏号
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CSCD:1881613
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