摘要
通过对梵净山自然保护区不同生态环境中土壤甲螨的群落组成、垂直结构、多样性和相似性的研究表明,低等甲螨类群及个体数所占比例较高。Tectocepheus、Oppiella、Xylobates、Perxylobates等属是该保护区的优势类群。其中,Tectocepheus属的优势地位比较独特。5个生境土壤甲螨群落的多样性随海拔的升高而降低,但其个体数量的变化与土壤特性特别是有机质含量密切相关。受坡向、坡度、人类活动等的影响,相同海拔样地的土壤甲螨群落表现出不同的异质性。各样地土壤甲螨群落多样性依次为:东坡海拔750m样地(A)>西坡海拔1500m样地(D)>东坡海拔1500m样地(B)>西坡海拔750m样地(C)>金顶海拔2200m样地(E)。E样地海拔最高,Malaconothrus在该样地数量巨增;样地C受人为破坏影响较大,Masthermannia数量明显增多;样地D生境较为优越,其个体数量为5样地之最。A、C样地甲螨群落相似性指数最高,为0.7073;C、E样地甲螨群落最不相似,相似性指数为0.5397。
The paper reported the results of study on the composition, vertical structure, diversity and similarity of soil Oribatid mites at the different habitat in Fanjing Mountain. The genus and amount of Macropylina are abundant. Tectocepheus,Oppiella,Xylobates,Perxylobates are dominant fauna. Tectocepheus is the particularly dominant genus of Fanjing Mountain. The diversity of soil Oribatid mites declines with the rising of altitude. The content of organic matter in soil influences the amount of soil Oribatid mites mainly. The structure of soil Oribatid mites is also impacted by the direction of slope, the gradient and the people's activities. The comparison of diversity of soil Oribatid mites at five plots is as follows: the plot's of altitude 750metre at eastern slope (A) > the plot's of altitude 1 500metre at western slope (D) > the plot's of altitude 1500metre at eastern slope (B)> the plot's of altitude 750metre at western slope (C)> the plot's of the Gold Peak (E). The individual quantities of Malaconothrus at the plot E and Masthermannia at the plot C are much more than other plots'. The individual quantities of the plot D are excessively more than other plots'. The soil Oribatid mite communities of the plot A and C are most similar, and those of the plot C and E are most unlike.
出处
《山地农业生物学报》
2003年第1期27-33,共7页
Journal of Mountain Agriculture and Biology
基金
贵州省科技厅科研基金资助项目[黔科合字(2000)3068]
贵州省教育厅基金资助项目
贵州大学科研基金资助项目
