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Initial Studies of the Insect Community of Leucaena leucocephala Plantation in Yuanmou Arid-hot Valley,Yunnan

LI Qiao1,GAO Tai-ping1,ZHOU Xing-yin1,CHEN Yan-lin1,GUO Wen-jun1 (1.Key Laboratory of Biodiversity Conservation in Southwest China of State Forestry Administration,Southwest Forestry College,Kunming 650224,Yunnan,China)  
The arthropod community of Leucaena leucocephala plantation in Yuanmou Arid-hot Valley was investigated in 2005.132 species were reported,including 12 orders and 54 families,among which the list of 68 known species was given.In the plantation,the species richness,Shannon-Wiener index,Simpson index and Pielou evenness index of the sub-community in the tree-shrub-grass layer were respectively 98,3.588,0.050,and 0.783,and those of the sub-community in the litter-layer were 49,3.255,0.053 and 0.836.Without the damage of chemical control,the natural enemies had active effects at the control on phytophagous pests.The ability to accept insect species and individuals in Leucaena leucocephala plantation is lower than that in Dodonaea angustifolia-Heteropogonetea contortus scrub and grass clump,which is widely distributed in the local.However,the insect diversity of the former is close to that of the latter.The study also shows that the plantation has protective effects on flying insects.Planting Leucaena leucocephala in certain areas helps to enhance local biodiversity but planting it in a multitude of areas does harm the biodiversity.
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