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群落建群种的基因型多样性是否具有与物种多样性类似的生态功能已经成为种群生态学非常关注的问题,研究结果能够为种群或群落的保护和恢复提供理论指导。基于已构建并施加不同强度干扰(无刈割、留茬10 cm和留茬5 cm)的不同基因型组合(1-、3-、6-基因型)的羊草种群,本研究采集其地下部土壤研究羊草基因型数目及干扰对地下动物群落和微生物群落的影响。结果表明:(1)羊草基因型数目和干扰强度的交互作用对土壤动物的种类、数量的影响显著(P<0.05)。(2)在留茬10 cm处理组中,土壤动物的数量与羊草种群基因型数目呈显著的正相关关系(P<0.05),符合“资源化假说”。(3)在无刈割处理组中,羊草的基因型数目对根际土壤中微生物群落的组成和结构具有显著的影响(P<0.05)。
Whether the genotypic diversity of community-based species has similar ecological functions to species diversity has become a very important issue in population ecology, and the results can provide theoretical guidance for the conservation and restoration of populations or communities. Based on the populations of Leymus chinensis, which had been constructed and applied with different genotype combinations (no clipping, stubble and stubble) of different genotypes (1-, 3- and 6-genotypes) Effects of genotypes and disturbances of Leymus chinensis populations on the dynamics of underground animal communities and microbial communities. The results showed that: (1) The interaction between the number and intensity of Leymus chinensis had a significant effect on the species and quantity of soil animals (P <0.05). (2) There was a significant positive correlation between the numbers of soil animals and the genotypes of Leymus chinensis (P <0.05) in the 10cm stubble treatment group, which accorded with the “resource hypothesis”. (3) The number of genotypes of Leymus chinensis had a significant effect on the composition and structure of microbial communities in the rhizosphere soil (P <0.05).