草地物种多样性对群落可入侵性影响的研究进展

综述草地群落入侵实验中物种多样性和群落可入侵性关系的研究进展。目前物种多样性与群落可入侵性主要出现了对立的关系模式,被普遍接受的解释机制为尺度依赖。但其它研究中出现了更为复杂的关系,提出物种特性、植物更新、种间关系变化和群落构建机制等其它因素可能是导致物种多样性与群落可入侵性出现复杂关系的原因。建议未来研究中应注意的几个问题,即物种多样性与群落可入侵性关系在不同营养级适用性,与群落构建机制变化间的联系和时间尺度对物种多样性与群落可入侵性关系的影响。

Research advances in the relationships between species diversity and invasibility in grassland communities

This paper reviewed the progress in the relationship between species diversity and invasibility in the grassland communities. At present,the mechanism of scale dependence was mainly used to explain the opposite results of the relationship between species diversity and invasibility. Basing on the analysis of other complex relationships,we speculated that species character,plant regeneration,interspecific interaction and the mechanism of community assembly may be the reason that led to the complex relationships. Several other issues should be integrated into the study to explain the complex relationship,i.e.,the application of species diversity-invasibility relationship in different trophics,the link of the change of community assembly and the species diversity-invasibility relationship,and the effect of time scale on the species diversity-invasibility relationship.