Linking stoichiometric homoeostasis with ecosystem structure, functioning and stability.
Linking stoichiometric homoeostasis with ecosystem structure, functioning and stability.
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DOI：
10.1111/j.1461-0248.2010.01532.x
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发表时间：
2010-11
期刊：
影响因子：
8.8
通讯作者：
Qiang Yu;Q. Chen;J. Elser;N. He;Honghui Wu;Guangming Zhang;Jianguo Wu;Yongfei Bai;Xingguo Han-Xin
中科院分区：
文献类型：
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作者：
Qiang Yu;Q. Chen;J. Elser;N. He;Honghui Wu;Guangming Zhang;Jianguo Wu;Yongfei Bai;Xingguo Han-Xin
生态系统的结构、功能和稳定性是近20年来生态与环境科学研究的热点。然而，它们之间关系的机制还不清楚。基于对内蒙古草原的综合研究，在1200 km样带上，物种水平的化学计量稳态与优势度和稳定性在2 a和27 a时间尺度上均呈显著正相关。在群落水平上，化学计量稳态在大多数情况下也与生态系统功能和稳定性呈正相关。因此，同向平衡物种往往具有高而稳定的生物量;由更多同向平衡物种占主导地位的生态系统具有更高的生产力和更大的稳定性。通过调节生物体对关键环境驱动因素的反应，化学计量稳态似乎是草地生态系统结构、功能和稳定性的主要机制。
Ecosystem structure, functioning and stability have been a focus of ecological and environmental sciences during the past two decades. The mechanisms underlying their relationship, however, are not well understood. Based on comprehensive studies in Inner Mongolia grassland, here we show that species-level stoichiometric homoeostasis was consistently positively correlated with dominance and stability on both 2-year and 27-year temporal scales and across a 1200-km spatial transect. At the community level, stoichiometric homoeostasis was also positively correlated with ecosystem function and stability in most cases. Thus, homoeostatic species tend to have high and stable biomass; and ecosystems dominated by more homoeostatic species have higher productivity and greater stability. By modulating organism responses to key environmental drivers, stoichiometric homoeostasis appears to be a major mechanism responsible for the structure, functioning and stability of grassland ecosystems.