土壤微生物对植物多样性-生态系统功能关系的调控作用

宋威, 程才, 王嘉伟, 吴纪华

Soil microbes regulate the relationships between plant diversity and ecosystem functions

Song Wei, Cheng Cai, Wang Jiawei, Wu Jihua

图2 菌根真菌对植物多样性-生产力关系的驱动机制概念图。黑色和白色圆圈分别代表丛枝菌根真菌共生植物物种和外生菌根真菌共生植物物种, 不同的圆圈线条类型表示不同物种, 圆圈大小代表植物物种资源利用能力的相对强弱。对于丛枝菌根真菌共生植物而言, 高植物多样性条件下, 丛枝菌根真菌主要通过促进宿主间对资源的互补利用来加强植物多样性对生产力的促进作用(A); 对于外生菌根真菌共生植物而言, 尽管宿主间存在互补利用, 但其主要通过提高特定宿主的资源利用能力来加强植物多样性-生产力关系(B); 当宿主与两种菌根真菌共存时, 以上两种作用共存(C)。

Fig. 2 Conceptual figure illustrating the mechanisms by which mycorrhizal fungi drive plant diversity-productivity relationships. Black and white circles represent plant species associated with arbuscular mycorrhizal fungi (AMF) and ectomycorrhizal fungi (EMF), respectively, with varying line styles denoting different plant species, and the size of the circles indicating the relative strength of resource utilization capabilities of the plant species. For plants in association with arbuscular mycorrhizal fungi, under high plant diversity conditions, AM fungi primarily enhance the positive effect of plant diversity on productivity by promoting complementary resource use among hosts (A). For plants associated with ectomycorrhizal fungi, although complementary utilization among hosts is present, they primarily strengthen the relationship between plant diversity and productivity by enhancing the resource utilization capacity of specific hosts (B). When hosts coexist with both types of mycorrhizal fungi, both of these effects are concurrent (C).