Responses of small mammals and vegetation to a reintroduction of Gunnison's prairie dogs
Responses of small mammals and vegetation to a reintroduction of Gunnison's prairie dogs
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DOI：
10.2307/1383181
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发表时间：
1999-11-01
影响因子：
1.7
通讯作者：
Gosz, JR
中科院分区：
文献类型：
--
作者：
Davidson, AD;Parmenter, RR;Gosz, JR
本研究探讨了重新引入甘尼森的草原土拨鼠（Cynomys gunnisoni）的塞维莱塔居民的小型哺乳动物和植物群落的初步影响。国家野生动物保护区（SNWR），新墨西哥州。1997年春，60只土拨鼠（36.8公斤活重）被引入沙漠草原的一个前土拨鼠聚居地。小型哺乳动物和植被采样的治疗（再引入网站）和对照网站（没有草原土拨鼠）之前和之后的草原土拨鼠被重新引入。我们测试的差异，小哺乳动物和植物群落的变化，在第一年的殖民地的存在，使用重复测量方差分析。虽然草原土拨鼠的生物量是约。草原土拨鼠的再引入对当地小型哺乳动物和植物群落没有显著影响，是当地啮齿动物群落的32倍（1.2 kg）。总生物量和丰富的啮齿动物，百分比覆盖和物种丰富度的植物没有改变在第一年重新引入土拨鼠。然而，两种啮齿动物物种表现出显着差异的草原土拨鼠殖民地和控制网站之间的丰度。在重新引入草原犬鼠之前和之后，处理部位的旗尾袋鼠鼠（Dipodomys cabababilis）数量显著增加。相比之下，白足鼠（Peromyscus leucopus）显着更丰富的控制网站后，重新引入草原犬鼠。草原土拨鼠栖息地的改变可能是导致D.和白柄假单胞菌（P.leucopus）。虽然土拨鼠的重新引入在短期内对当地小型哺乳动物和植物群落没有明显的影响，但在长期时间尺度上，它们的影响可能更为明显。
This study addressed the initial effects of a reintroduction of Gunnison's prairie dogs (Cynomys gunnisoni) on resident small mammal and plant communities on the Sevilleta. National Wildlife Refuge (SNWR), New Mexico. In spring 1997, 60 prairie dogs (36.8 kg live mass) were introduced onto a former prairie dog colony in a desert grassland site. Small mammals and vegetation were sampled on both a treatment (reintroduction site) and a control site (without prairie dogs) before and after the prairie dogs were reintroduced. We tested for differences in small mammal and plant community change during the 1st year of the colony's existence using repeated measures analysis of variance. Although prairie dog biomass was ca. 32 times greater than that of the resident rodent community (1.2 kg), reintroduction of prairie dogs had no significant effect on the resident small mammal and plant communities. Total biomass and abundance of rodents, and percent cover and species richness of plants did not change during the 1st year following reintroduction of prairie dogs. However, two rodent species showed significant differences in abundance between the prairie dog colony and the control site. The banner-tailed kangaroo rat (Dipodomys spectabilis) was significantly more abundant on the treatment site before and after reintroduction of prairie dogs. In contrast, the white-footed mouse (Peromyscus leucopus) was significantly more abundant on the control site following reintroduction of prairie dogs. Habitat modifications made by the former prairie dog colony may be responsible for the habitat preferences observed by D. spectabilis and P. leucopus. Although reintroduction of prairie dogs had no observable influence on the resident small mammal and plant communities in the short-term, their influences may be more evident on a long-term time scale.