东太湖表层沉积物放线菌群落结构多样性及其空间异质性

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Abstract

We used denaturing gradient gel electrophoresis(DGGE) fingerprints to examine genetic diversity and spatial distribution of actinobacterial community composition(ACC) in surface sediments of East Taihu Lake.It was shown that there was a high degree of genetic diversity,and an average of 21.5±2 bands was identified from the DGGE profiles.However,the community diversity(i.e., Shannon-Wiener index) did not show an apparent pattern among all sampling sites.And the cluster analysis indicated that the spatial variations of ACC were related to the location of sampling sites.That is,the larger distance of the sampling sites,the more dissimilarity of the ACC.This may be caused by the similar physicochemical factors between pairwise sites.Canonical correspondence analysis(CCA) was carried out to examine the relationship between environmental variables and ACC,and sediment pH was identified as the key factor in regulating the variations of ACC.

Key words： Actinobateria DGGE phylogenetic diversity spatial heterogeneity CCA

Received: 25 February 2011

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	ZHANG Yong
	SHEN Ji
	WANG Jian-jun
	ZHANG Sheng-zhou

Cite this article:

ZHANG Yong,SHEN Ji,WANG Jian-jun, et al. Phylogenetic diversity and spatial heterogeneity of Actinobacteria communities in the surface sediments of the East Taihu Lake[J]. , 2011, 30(1): 8-13.

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http://www.ecolsci.com/EN/ OR http://www.ecolsci.com/EN/Y2011/V30/I1/8

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