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生态学报  2005 

Relationships between the arthropods in the canopy and the underlayer of Phyllostachys heterocycla cv.pubescens forest
毛竹林冠层与林下层节肢动物类群的关系

Keywords: Phyllostachys heterocycla cv,pubescens,arthropod community,canopy,underlayer,species diversity
毛竹
,节肢动物群落,林下层,竹冠层,物种多样性

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Abstract:

The arthropod community in Phyllostachys heterocycla cv.pubescens forest was divided into two groups of canopy and underlayer according to the heterogeneity of their habitats.The relationships between the arthropods in the canopy and the underlayer were studied in 23 selected sampling places of P.heterocycla cv.pubescens forest in Sanming and Saxian of Fujian Province,P R China from 2001 to 2002.The results showed that there were 258 common species between the canopy and the underlayer in the community,including 38 species of neutrals,88 species of herbivores,53 species of spiders,38 species of predatory insects and mites and 41 species of parasitoids.They belonged mainly to the orders of Arancida,Hymenoptera,Dipetera and Coleoptera.There were 132 common species of natural enemies which accounted for 51.16% of the total common species.The measurement of community similarity showed a high similarity of species composition between the canopy and the underlayer.The common species moved between the two groups.Greater movements of species and individuals were observed from March to July and from October to November than any other time of the year.The species in the underlayer transferred more than that in the canopy.The neutral species transferred more than other functional groups.The canopy played an important roles as species resources and pool,in the reestablishment and collapse of the arthropod group in the underlayer led by the seasonal management actions.Through the analysis of the canonical correlation between the two groups,the richness and species diversity in the underlayer seemed to significantly affect each other regarding the richness,species diversity and evenness in the canopy.Thus,conservation of natural enemies and species diversity in the underlayer could benefit the conservation of natural enemies and species diversity in the canopy.

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