Field Margin's Function for Biodiversity: A Case Study on Carabids Beetles in Dongbeiwang, Beijing

Abstract

Abstract: In 2000,the species and diversity of carabids beetle were investigated by pitfall trap in 14 land-use treatments of Dongbeiwang agroecosystem in Beijing.The treatments included woodlots,field margins,wheat/corn fields and vegetable fields with different cultivation measures.Analysis of variance (ANOVA) showed that the irragation,fertilization and straws have no effect on the diversity of carabid community;the number of species and individual number of carabid community in the woodlots,field margins were higher than these in the fields;the field margins had positive effect on the diversity and richness of carabid community in their adjacent field;moderation disturbance was beneficial for higher individual number of carabid community.It is concluded that field margin are necessary to maintain a diverse predatory carabid community in agroecosystem.

Key words: water treatment,  Cassia obtusifolia, Isatis indigotica, stable carbon isotope discrimination, water use efficiency.

CLC Number:

Liu Yunhui, Yu Zhenrong, Liang Hongbin. Field Margin's Function for Biodiversity: A Case Study on Carabids Beetles in Dongbeiwang, Beijing[J]. cje, 2002, (5): 69-73.

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