北美CHIHUAHUAN荒漠啮齿动物群落各物种种群生物量动态的比较研究  

A COMPARATIVE STUDY OF BIOMASS DYNAMICS OF THE SPECIES POPULATIONS OF THE DESERT RODENT COMMUNITY IN THE CHIHUAHUAN DESERT OF NORTH AMERICA

作　　者：曾宗永[1] 杨跃敏[1] 宋志明 

机构地区：[1]四川大学生物系

出　　处：《Zoological Research》1994年第2期32-41,共10页动物学研究（英文）

摘　　要：本文给出了北美Ｃｈｉｈｕａｈｕａｎ荒漠分属４科１０属的１７种啮齿动物生物量的时间序列资料，利用时间序列分析方法、均匀性的Ｓｈａｎｎｎｏｎ指数和季节性指标对该１７个物种的生物量动态的比较研究说明：优势种在群落总生物量稳定中起着主要作用，其余非优势物种则在优势种种群密度较低时弥补低生物量，使１７个物种种群能共存于同一群落之中，使处于复杂多变的荒漠生境中的啮齿动物的生物量保持相对稳定。扩散在维持这种稳定中有明显的作用。Comparisons of biomass time series data on 17 species populations of the desert rodents inhabiting the experimental study site in the Chihuahuan Desert are presented. Time series analysis, Shannon index of evenness and seasonality index are used for assessing allocation patterns of the total community biomass among 17 species populations and the role of dispersal in the patterns.The results suggest that two dominant species,Dipodomys merriami and D. spectabilis,played significant role in stabling the community total biomass and other non-dominant species subsidized community biomass when biomass of the dominants was low. Dispersal, one of the conspicuous traits of life history of desert rodents, contributed to the patterns and played an important role in the coexistence of 17 species.

关 键 词：荒漠 生物量 啮齿目 群落 种群 

分 类 号：Q959.837[生物学—动物学]