Blaustein Andrew R
Department of Zoology, Oregon State University, 97331, Corvallis, Oregon, USA.
Oecologia. 1981 Feb;48(1):71-78. doi: 10.1007/BF00346990.
The population dynamics of three sympatric rodents, Microtus californicus, Mus musculus, and Reithrodontomys megatolis was studied at four sites in coastal southern California. The study was undertaken to determine the extent of local demographic diversity in rodent populations.The populations of all rodent species became extinct on one site, while on another site the populations fluctuated widely and on two other sites the populations remained relatively stable. The most common species, Reithrodontomys, exhibited differences in reproduction, age class structure, recruitment, and survivorship on the two sites which were monitored for relatively long terms. Immigration was the main source of new individuals entering the sites where the Reithrodontomys population was most persistent.On a local scale, some life history characteristics are affected in a density dependent fashion. When viewed on a global scale, the non-equilibrium nature of the rodent populations becomes clear.
在南加州沿海的四个地点研究了三种同域啮齿动物——加利福尼亚田鼠（Microtus californicus）、小家鼠（Mus musculus）和加州林鼠（Reithrodontomys megatolis）的种群动态。开展这项研究是为了确定啮齿动物种群中局部种群统计学多样性的程度。所有啮齿动物物种的种群在一个地点灭绝，而在另一个地点种群波动很大，在另外两个地点种群保持相对稳定。最常见的物种加州林鼠，在两个长期监测的地点，其繁殖、年龄结构、补充和存活情况存在差异。迁入是新个体进入加州林鼠种群最稳定地点的主要来源。在局部尺度上，一些生活史特征受到密度依赖方式的影响。从全球尺度来看，啮齿动物种群的非平衡性质变得清晰。
