Ghiselin Jon
Department of Zoology, University of Wisconsin, Madison, Wisconsin.
, 418 Hawthorne Avenue, 17701, Williamsport, Pennsylvania, U.S.A.
Oecologia. 1970 Sep;4(3):248-261. doi: 10.1007/BF00377249.
The influence of soil texture on habitat selection by kangaroo mice was evaluted at three areas - Lincoln, Nye, and Pershing Counties, Nevada, where Microdipodops megacephalus and M. pallidus are sympatric.All rodents captured on surveyed grids were marked by toe-clipping and released where they were caught. Soils were sampled chiefly at the positions of traps which had captured kangaroo mice. A soil was classified as sand if 95% (by weight) or more of a sample passed a 2.00-mm sieve, and as gravel if less material passed the sieve. In the areas investigated, a Sarcobatus baileyi-Atriplex confertifolia community predominated.Capture-recapture data from the three study areas were both evaluted individually for each plot and pooled. Although the distribution of M. pallidus was shown to be random with regard to soil type, M. megacephalus was captured almost exclusively on gravel. Comparison of the species using pooled data showed a highly significant difference (p=0.001) in the types of soil on which they were captured. Theoretical implications of the study are discussed.
在内华达州的林肯县、奈县和珀欣县这三个地区，评估了土壤质地对更格卢鼠栖息地选择的影响，在这些地区，巨颅更格卢鼠和苍白更格卢鼠同域分布。在调查网格上捕获的所有啮齿动物都通过剪趾做标记，并在捕获地点放生。土壤主要在捕获更格卢鼠的陷阱位置进行采样。如果样本中95%（按重量计）或更多的物质能通过2.00毫米筛网，则该土壤被归类为沙子；如果通过筛网的物质较少，则归类为砾石。在所调查的地区，以贝利肉叶刺茎藜-密聚滨藜群落为主。来自三个研究区域的捕获-再捕获数据分别针对每个样地进行评估，然后合并。尽管苍白更格卢鼠的分布在土壤类型方面显示为随机分布，但巨颅更格卢鼠几乎只在砾石上被捕获。使用合并数据对这两个物种进行比较，结果表明它们被捕获的土壤类型存在极显著差异（p = 0.001）。文中讨论了该研究的理论意义。
