Diversity and stability of arthropod assemblage in tea orchard

Abstract

Abstract: Two tea orchards,simplex tea orchard with weeds removed manually or by herbicides (STO) and complex tea orchard with the weed Hedyotis uncinella(CTO),each with an area of 0.4 hm²,were established in 1995 in Yingde Hongxing Tea Plantation,Guangdong Province.The primary eigenvalues,species richness index (R),assemblage diversity index (H'),evenness index (J) and species concentration index (C) of arthropod assemblage were employed and compared to assess the efficacy of STO and CTO on the diversity and stability of arthropod assemblage.Stability indexes S_s/S_i and S_n/S_p and variation coefficient of diversity index d_s/d_m were utilized as well.The results demonstrated that the R of arthropod assemblage in CTO ranged from 4 to 8,with the highest of 7.7403,while that in STO varied mainly between 4 to 6.The average R of arthropod assemblage in CTO was 5.4672?0.3483,higher than that in STO (4.8809?0.3175).The H' of arthropod in CTO (3,8535?0.1232) was higher,in contrast to the value in STO (3.4654?0.1856).The J in CTO was higher,while the species concentration index (C) was lower,in comparison to STO.The stability indexes S_s/S_i and S_n/S_p of CTO were greater than those of STO,while the d_s/d_m in CTO (0.1107) was lower than that in STO (0.1855).All these indicated that the diversity of arthropod assemblage was better preserved in CTO,and the arthropod assemblage in CTO was more stable.

Key words: Tea orchard, Arthropod assemblage, Diversity, Stability

CLC Number:

Q968.1

CHEN Yigen, XIONG Jinjun, HUANG Mingdu, GU Dejiu . Diversity and stability of arthropod assemblage in tea orchard[J]. Chinese Journal of Applied Ecology, 2004, (5): 875-878.

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