Functional Redundancy Instead of Species Redundancy Determines Community Stability in a Typical Steppe of Inner Mongolia.
Functional Redundancy Instead of Species Redundancy Determines Community Stability in a Typical Steppe of Inner Mongolia.
复制标题
内蒙古典型草原群落稳定性由功能冗余而非物种冗余决定
DOI：
10.1371/journal.pone.0145605
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发表时间：
2015
期刊：
影响因子：
3.7
通讯作者：
Sun X
中科院分区：
文献类型：
--
作者：
Kang S;Ma W;Li FY;Zhang Q;Niu J;Ding Y;Han F;Sun X
背景冗余假说预测植物群落中物种的冗余增强了群落的稳定性。然而，近年来的大量研究质疑冗余与稳定性之间的正相关关系。方法按照微地形引起的资源可利用性梯度取样，探讨中国北部典型草原草地物种冗余、功能冗余与群落稳定性之间的关系。我们的目的是测试群落冗余是否增强了群落的稳定性，并量化了物种冗余和功能冗余在维持群落稳定方面的相对重要性。结果植物群落生产的空间稳定性随土壤资源供给的增加而增加，功能冗余度而不是物种多样性或物种冗余度与群落稳定性相关。我们的研究结果支持冗余假说，并对草地的可持续管理具有一定的指导意义。
Background The redundancy hypothesis predicts that the species redundancy in a plant community enhances community stability. However, numerous studies in recent years questioned the positive correlation between redundancy and stability. Methodology We explored the relationship between the species redundancy, functional redundancy and community stability in typical steppe grassland in Northern China by sampling grassland vegetation along a gradient of resource availability caused by micro-topography. We aimed to test whether community redundancy enhanced community stability, and to quantify the relative importance of species redundancy and functional redundancy in maintaining community stability. Results Our results showed that the spatial stability of plant community production increases with increased supply of soil resources, and the functional redundancy instead of species diversity or species redundancy is correlated with the community stability. Our results supported the redundancy hypothesis and have implications for sustainable grassland management.