| 生物土壤与生态 |
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| Composition and Diversity of Surface-active Soil Fauna Communities in Arid Desert Ecosystems of the Heihe Basin |
| LIU Ji-liang, LI Feng-rui, LIU Qi-jun, NIU Rui-xue |
| Linze Inland River Basin Research Station, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China |
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Abstract Soil animal is one of the most important components of arid desert ecosystems and plays a key role in maintaining ecosystem structure and function. Up to now, relatively fewer studies have explored seasonal variation in soil animal community composition and diversity of arid desert ecosystems in the Heihe basin, Northwest China. We used an arid desert ecosystem of the Heihe basin as a study system, and investigated the composition and diversity of surface-active soil animal communities within a sampling area of 5 000 m2 using pitfall trapping method in both June and September 2008. Main findings of this study are as follows. (1)We identified a total of 37 groups of soil fauna from 3 407 individuals sampled in the study area, of which the dominant groups included Lygaeidae and Formicidae, and the secondary dominant groups included Tenebrionidae, Curculionidae, Gnaphosidae, Linyphiidae, Erythraeoidae, Entomobryoidae and acridoidae. (2)The observed soil animal community was divided into three different body size classes of macrofauna, mesofauna and microfauna, accounting for 94.1%, 5.6% and 0.3% of the total community individual number, respectively. Additionally, the observed soil animal community is consisted of five functional groups such as predators, fungivores, phytophage, detritivores and omnivores, accounting for 10.8%, 38.5%, 18.2%, 4.7% and 27.8% of the total community individual number, respectively. (3)There was a significant within-season variation in the composition, abundance and diversity of the soil animal community, and this seasonal variation was mainly reflected in between-season variability in community composition, abundance and diversity as well as in the number of individuals of different groups.
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Received: 02 September 2009
Published: 20 March 2010
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2010, Vol. 30 
