摘要
在鼠种群高密度时期,洞群为均匀分布.位于洞群中心的土丘通常被小叶锦鸡儿灌丛覆盖。分析布氏田鼠空间分布格局的适宜样方单位面积为10m×10m。鼠种群、雄鼠以及雌鼠都是聚集分布。繁殖季节,幼鼠以个体群为基本分布单元呈聚集分布,亚成体鼠以个体群为基本分布单元呈随机分布,成体鼠以个体为基本分布单元呈随机分布。布氏田鼠的聚集分布是由其繁殖方式和社群关系所致,而不太可能是栖息环境所致。鼠种群聚集分布强度从春到秋无显著性改变。
The spatial pattern of burrow units of Brandt's voles is regular in high-density phases of the population. The mounds at the centers of burrow units, usually are excavated around shrubs of the species Caragana micropkylla. 10m×10m quadrats are fouud to be of a suitable size to analyze the spatial patterns of the voles. Both male and female Brandt's voles(Microtus brandti, Radde), are distributed in an aggregated pattern. During the breeding season, juveniles and subadults show the aggregated distribution type, but adults are randomly distributed. Juveniles basic components of the distribution are the aggregated individuals and aggregated, so are the subadults, but subadults components are randomly distributed, the adults'components are the single individual and randomly distributed. The aggregated distribution of Brandt's voles is the result of their reproduction type and social relationships, not their habitat. The intensity of aggregation shows no significant change from spring to fall.
出处
《北京师范大学学报（自然科学版）》
CAS
CSCD
1991年第1期75-81,共7页
Journal of Beijing Normal University(Natural Science)
基金
国家"七五"攻关课题
代号75-03-04-02
关键词
布氏田鼠
空间分布格局
聚集分布
spatial pattern
Brandt′s vole
aggresated distribution
random distribution
