Mycorrhizal fungal identity and richness determine the diversity and productivity of a tallgrass prairie system
Mycorrhizal fungal identity and richness determine the diversity and productivity of a tallgrass prairie system
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DOI：
10.1111/j.1469-8137.2006.01854.x
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发表时间：
2006-01-01
期刊：
影响因子：
9.4
通讯作者：
Bever, James D.
中科院分区：
文献类型：
--
作者：
Vogelsang, Keith M.;Reynolds, Heather L.;Bever, James D.
我们研究了丛枝菌根真菌（AMF）的物种丰富度和组成对植物群落生产力和多样性的影响，以及AMF是否通过促进磷利用的生态位分化来介导植物物种共存。我们的实验在高草草原中宇宙系统的一系列磷条件下操纵了AMF的物种丰富度和特性。我们发现增加AMF丰富度促进了植物多样性和生产力，但这种AMF丰富度效应相对于单个AMF物种的效应较小。我们几乎没有发现AMF促进磷利用互补性的证据。相反，AMF丰富度效应似乎是由包含特定的促进多样性和生产力的AMF所导致的（一种抽样效应）。此外，促进多样性的真菌的特性随着磷环境而改变，AMF促进多样性和促进生产力的益处之间的关系也是如此。我们的结果表明，植物多样性和生产力对AMF特性的反应比对AMF多样性本身更敏感，并且AMF特性和磷环境可以以复杂的方式相互作用以改变群落层面的特性。
We investigated the effects of arbuscular mycorrhizal fungal (AMF) species richness and composition on plant community productivity and diversity, and whether AMF mediate plant species coexistence by promoting niche differentiation in phosphorus use.Our experiment manipulated AMF species richness and identity across a range of P conditions in tallgrass prairie mesocosms.We showed that increasing AMF richness promoted plant diversity and productivity, but that this AMF richness effect was small relative to the effects of individual AMF species. We found little support for AMF-facilitated complementarity in P use. Rather, the AMF richness effect appeared to be caused by the inclusion of particular diversity- and productivity-promoting AMF (a sampling effect). Furthermore, the identity of the diversity-promoting fungi changed with P environment, as did the relationship between the diversity-promoting and productivity-promoting benefits of AMF.Our results suggest that plant diversity and productivity are more responsive to AMF identity than to AMF diversity per se, and that AMF identity and P environment can interact in complex ways to alter community-level properties.