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2010年7月,对拉鲁湿地5个采样区的土壤动物进行调查,共捕获土壤线虫10183条,隶属于2纲6目8科14属,其中真矛属(Eudorylaimus)、似绕线属(Anaplectus)、地单宫属(Geomonhystera)为优势类群。表层(0~5 cm)土壤线虫个体数量占总数的90.03%,表聚性明显。营养类群有食细菌线虫和捕食-杂食线虫两类。线虫群落生态指数对采样区生境有不同的响应,土壤线虫群落多样性指数H’、均匀度指数E在不同采样区的分布依次为:5#>4#>3#>1#>2#,而优势度指数C的分布为:2#>3#>1#>4#>5#,表明2#采样区的线虫群落多样性和稳定性小于其他采样区,土壤线虫群落趋于单一化。土壤理化特征与线虫数量、营养类群、生态指数间存在明显相关关系。5个采样区间土壤线虫群落的相似程度为极不相似到中等不相似(S值0.154~0.667)。表明线虫群落的变化能很好地反映生境的多样性,土壤线虫可作为湿地生态系统中一个重要的生物指示因子。
In July 2010, 10183 soil nematodes were captured from 5 sampling areas in Lalu wetland, belonging to 14 orders, 2 orders, 6 orders, 8 orders, of which Eudorylaimus, Anaplectus), Geomonhystera is the dominant group. The number of soil nematode individuals in the surface layer (0 ~ 5 cm) accounted for 90.03% of the total number, and the apparent polygamy was obvious. Nutritional groups have bacterial-feeding nematodes and predators - omnivores nematodes. The ecological index of nematode community had different responses to the habitat of sampling area. The diversity index H ’and evenness index E of soil nematode community in different sampling areas were 5 #> 4 #> 3 #> 1 #> 2 # The distribution of dominance index C was: 2 #> 3 #> 1 #> 4 #> 5 #, indicating that the diversity and stability of nematode community in sampling area # 2 were less than those in other sampling areas, and the soil nematode community tended to be single. Soil physical and chemical characteristics and the number of nematodes, nutrition groups, ecological index there is a clear correlation between. The similarity of soil nematode communities in five sampling areas was very dissimilar to moderately similar (S value 0.154 ~ 0.667). It showed that the change of nematode community can well reflect the habitat diversity. Soil nematode can be an important bioindicator of wetland ecosystem.