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The rodents were investigated with trap-day method in Mashan Desert of Inner Mongolia from August to September 1998 and 1999. Sixty-five sites were selected according to conditions of vegetation, landform, topography and soil. The area of the site was 10 ha in which 400 - 500 traps were arranged. There were 1019 samples captured with 31 469 effective trap-days in all sites.The results showed that Meriones meridianus was a typical dominant species and Euchoreutes naso was one of representative rodents in Mashan Desert. The Mashan Desert was a new distribution region of Salpingotus crassicauda in China. Therefore, geographical distribution of the three rodents was analyzed with Map-info Professional 6.5 software of GIS (Geographical Information System).The results showed that the distribution maps of the three rodents, which were obtained on the basis of GIS, not only told the information of prophetical distribution of the three rodents in Mashan Desert, but also reported information of the rodents‘ distribution affected by habitat change, which can not be obtained by traditional site-distribution ways. This result can be used as scientific foundation for perfecting research design and monitoring harmful rodents in future. 相似文献
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内蒙古阿拉善荒漠主要啮齿动物生态位测度比较 总被引:4,自引:1,他引:4
用3种不同的生态位宽度和生态位重叠测度方法,对内蒙古阿拉善荒漠11种主要啮齿动物的生态位进行了比较研究。结果表明,子午沙鼠的生态位宽度指数最高,3种方法计算结果分别为0.842、0.723、0.516。该种在7种生境中均有分布,且以人工草地和农田的数量最高,天然草地的数量最低,对7种资源等级的利用具有一定的选择性。五趾跳鼠的次之,分别为0.751、0.722、0.513。该种在7种生境中均有分布且数量差异不大,对7种资源等级的利用具有一定的普遍性。比较3种生态位宽度指数测度方法,以Shannon.WienerIndex对荒漠区啮齿动物较为适宜。生态位重叠指数最高的啮齿动物因计算方法的不同有1-9个种对,生态位重叠指数最低的有10~11个种对。分析比较3种生态位重叠指数测度方法,以Pianka Index更适合于荒漠区啮齿动物的生态位重叠测度。 相似文献
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阿拉善地区不同生境小型兽类群落多样性研究 总被引:9,自引:2,他引:7
本对内蒙古阿拉善地区不同生境中小型兽类群落的物种组成和多样性进行了初步研究。1998年8~9月和1999年8~9月,2002年10月,在8种不同生境类型中共布放54个样地,22606个有效铗日,捕获小型兽类标本866只,分属2目6科,共20种。多样性分析结果表明:8种不同生境的小型兽类群落Shannon-Wiener多样性指数在1.186~1.589之间;Pielou均匀性指数在0.6309~0.8618之间;Simpson生态优势度指数在0.2349~0.4157之间;Margalef丰富度指数在0.9318~2.020之间。根据不同生境的小型兽类群落相似性指数聚类结果,可以将8种生境的小型兽类群落大致划分为4种类型:耐旱型(群落Ⅴ和群落Ⅶ)、干旱型(群落Ⅰ、Ⅱ、Ⅲ)、农林交错型(群落Ⅵ和群落Ⅷ)和森林型(群落Ⅳ)。生境条件的差异对小型兽类群落物种组成和多样性有一定的限制作用,而人为干扰有明显影响。 相似文献
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