关键词: 比较种群生态学, 农田, 种群动态, 啮齿动物, 繁殖

Abstract: Mark-recapture experiment in the Western Sichuan Plain provided data on population density, biomass and reproduction of Rattus nitidus, Rattus norvegicus, Rattus niviventer and Rattus flavipectus.The differences in population density,biomass and frequency of appearance suggested that R.. nitidus is the dominant species, R.norvegicus and R.. niviventer are common species, and R.flavipectus is rare species in the rodent community. With the highest seasonality index andlowest coefficient of variation, R.nitidus shows the mostsignificantseasonal pattern, and the lowest fluctuation in population density and biomass. In contrast, R.flavipectu, shows the highest fluctuation andnosignificantseasonal pattern. The dominantspecies can reproduce inmost months, the reproduction of rare species confine in few months, common species have more reproductive potential than other species. The dynamics and reproduction of rodents in same communityshow some extent diversity among dominant, common and rare species, for coexistence to use the resources in same habitat.

Key words: Comparative population ecology, Cropland, Population dynamics, Reproductio, Rodents