The present study was conducted to investigate the differences in managed farming practices, including low-intensive farming, duck farming, and golden apple snail farming, in a rice ecosystem by comparing terrestrial arthropod communities. A total of 75 species from 70 genera belonging to 43 families in 11 orders were identified from 9,622 collected arthropods. Araneae, Hemiptera, and Coleoptera were the richest taxa. Collembola was the most abundant, followed by Diptera, Hemiptera, and Araneae. Bray- Curtis similarity among the farming practices was very high (76.7%). The biodiversity of each farming practice showed a similar seasonality pattern. The richest species group was the predators, followed by the herbivores. The species richness and diversity of ecologically functional groups among the farming practices were not statistically significant, except for the abundance of predators in golden apple snail farming. The biodiversity seasonality of ecological functional groups in each farming practice showed similar patterns. The biomass of Araneae, Hemiptera, Coleoptera, and Diptera was greater than the other taxa, in general. The biomass of each ecological functional group showed little difference and the biomass fluctuation patterns in each farming practice were almost the same. Collectively, the community structures and biodiversity of terrestrial arthropods among the farming practices in the present study were not different. The present study may contribute to sustain rich biodiversity in irrigated rice fields and to advanced studies of food webs or energy flow structures in rice fields for ecological and sustainable agriculture.

Abstract
Introduction
Materials and Methods
    1. Study sites
    2. Sampling and identification
    3. Rice growth stages
    4. Measurement of biomass
    5. Data analysis
Results
    1. Terrestrial arthropod communitystructure, biodiversity and seasonality
    2. Structure and seasonality of ecologicalfunctional groups
    3. Biomass fluctuation of rice plant andarthropods
Discussion
References

• Sue-Yeon Lee(Division of Microorganism Resources, National Institute of Biological Resources)
• Myung-Hyun Kim(Climate Change & Agroecology Division, Department of Agricultural Environment, National Institute of Agricultural Sciences, RDA)
• Jinu Eo(Climate Change & Agroecology Division, Department of Agricultural Environment, National Institute of Agricultural Sciences, RDA)
• Young Ju Song(Climate Change & Agroecology Division, Department of Agricultural Environment, National Institute of Agricultural Sciences, RDA)
• Seung-Tae Kim(Life and Environment Research Institute, Konkuk University) Corresponding author