Effects of different land-use types on larger-size soil animal communities in the northern region of Qinghai Lake

Abstract

Abstract: To investigate the effects of different land-use styles on soil animal communities in the grasslands of the northern region of Qinghai Lake, the larger-size soil animals from 10 different sites were investigated. A total of 657 animals (belonging to 3 classes 9 orders 13 taxonomic groups) were collected, with larval Coleopteran (beetles), larval Diptera and adult Coleopteran as the dominant groups. Compared with former related studies in other regions in the northwest of China, the northern region of Qinghai Lake had rather low numbers (11 individuals per 50 cm×50 cm×20 cm quadrat) and diversity, perhaps due to the arid nature of the area. Compared with three other original grassland types, abandoned land in the Guoluozang County area, soil animals were very scarce, while in the reseeded land there were significantly larger numbers of soil animals, indicating that cultivations had destructive effects on the Achnatherum grassland, while manual activities might be helpful for the recovery process. In the Lanniwan area, there were no differences in animal numbers, biomass and biodiversity between 18-years and 6-years enclosed grassland, but the unfenced grazing channel had significantly lower numbers and animal biomass than the two enclosed grasslands, indicating the negative effects of degraded vegetation and soil conditions on soil animal communities. In the River Beach area, there were no differences of animal biomass, number and biodiversity between the grazing channel and the enclosed meadow steppe, perhaps due to the humid soil environment in the area.

CLC Number:

S154.5

LIN Gong-hua, ZHAO Fang, CHEN Gui-chen, CHEN Sheng-yun, SU Jian-ping, ZHANG Tong-zuo. Effects of different land-use types on larger-size soil animal communities in the northern region of Qinghai Lake[J]. Acta Prataculturae Sinica, 2012, 21(2): 180-186.

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