内蒙古典型草原区狭颅田鼠集群数量与被捕食风险的关系

发布时间：2018-02-22 21:10

本文关键词： 狭颅田鼠艾虎捕食风险集群数量　出处：《生态学报》2016年24期 　论文类型：期刊论文

【摘要】：2005年9月15日—30日,在内蒙古锡林郭勒盟西乌珠穆沁旗的典型草原上研究了狭颅田鼠(Microtus gregalis)冬季集群与来自艾虎(Mustela eversmanni)的捕食风险。采用鼠洞口数量作为狭颅田鼠集群大小的指标,分析了艾虎对不同大小狭颅田鼠集群的捕食优先选择偏好。对实验样地内狭颅田鼠的洞群洞口数进行了调查统计(样地内总共涉及102个狭颅田鼠有效洞群),并计数此期间的艾虎粪便堆数以及攻击掘开狭颅田鼠洞群的情况。运用非参数的Mann-Whitney U检验法进行数据分析,结果表明:从艾虎遗留的粪便痕迹来看,没有被艾虎访问过的田鼠洞群与被艾虎访问过的洞群之间差异达到极显著水平;另外,从狭颅田鼠洞口被艾虎掘开的痕迹来分析,没有被艾虎挖掘的洞群与被艾虎挖掘的洞群之间的差异也达到极显著的水平;另外,随着田鼠洞群洞口数量的增加,出现艾虎粪便和掘洞的频次和概率就越高。表明艾虎对狭颅田鼠集群洞口数的选择差异性非常显著,明显倾向于选择在洞口数量多的狭颅田鼠洞群停留,同时也更倾向于掘开洞口数量较高的狭颅田鼠洞群作为捕食对象。
[Abstract]:September 15, 2005 - 30 days, in the typical steppe of Inner Mongolia Xilinguole Meng West Ujimqin banner on the narrow skull (Microtus gregalis) winter voles cluster and (Mustela eversmanni) from the polecat predation risk. Using the rat hole number as the cluster size narrow skull vole index, analysis of different sizes of polecat narrow headed vole cluster predation priority the number of the group preference. The hole on experimental plots within the narrow skull voles were investigated (plots involving a total of 102 narrow skull cave, and effective vole) count in the period of polecat faeces. Number and attack narrow skull cave dug vole situation. By using the Mann-Whitney U test method of non parameter for data analysis, the results showed that: from left traces of polecat feces, there is no difference between being polecat visited caverns and polecat voles visited caves with a significant; In addition, from the narrow skull hole was dug Ai Hu vole traces of analysis, Ai Hu was not mining cave excavation by Ai Hu and between group differences also reached significant level; in addition, with the increase of the number of tunnels in the vole, Ai Hu feces and burrowing frequency and the higher the probability that. Ai Hu on the narrow skull hole number selection of cluster voles had significant difference, obviously tend to choose in the number of narrow skull cave voles stay, also tend to be more open the higher number of narrow skull cave as vole prey.

【作者单位】：中国科学院生态环境研究中心城市与区域生态国家重点实验室;中国科学院大学;新疆维吾尔自治区治蝗灭鼠指挥部办公室;内蒙古锡林郭勒盟镶黄旗草原工作站;内蒙古锡林郭勒盟苏尼特左旗草原工作站;

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