关键词: 恙螨, 群落, 种多度, 小型哺乳动物, 云南

Abstract: Objective To understand the species distribution of ectoparasitic chigger communities on small mammals in Yunnan province. Methods Mammals (the host of chiggers) were captured with mouse cage traps and bait in 16 counties (or cities) of Yunnan province. All the chiggers on two auricles of the hosts were made into specimens with Hoyer's medium and all the specimens were identified under microscope. Preston's lognormal distribution model was used to fit the species abundance. Results 6888 small mammal hosts were captured and 192 chigger species were collected, which belong to 21 genera, 3 subfamily of Trombiculidae. Leptotrombidium scutellare and L.sinicum were dominant chigger species. The species abundance distribution of chigger mites is successfully fitted to Preston's lognormal distribution model with the goodness of fit of 0.7975. Conclusion The species abundance distribution of chiggers on small mammals conforms to the lognormal distribution. Most chiggers species are the common species with middle levels of individuals, rare species take second place, while few species are dominant quantitatively.