Plant species traits are the predominant control on litter decomposition rates within biomes worldwide
Plant species traits are the predominant control on litter decomposition rates within biomes worldwide
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DOI：
10.1111/j.1461-0248.2008.01219.x
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发表时间：
2008-10-01
期刊：
影响因子：
8.8
通讯作者：
Westoby, Mark
中科院分区：
文献类型：
--
作者：
Cornwell, William K.;Cornelissen, Johannes H. C.;Westoby, Mark
世界范围内的分解率取决于气候和植物功能特性的遗产，如凋落物质量。为了量化物种之间的功能分化影响其凋落物分解速率的程度，我们汇集了来自六大洲66个分解实验的818种物种的叶性状和凋落物质量损失数据。我们证明：（i）物种驱动的差异的幅度比以前认为的要大得多，也比气候驱动的变化要大;（ii）物种凋落物的可分解性与该物种在全球不同生态系统中的生态策略一致相关，代表了整个植物碳策略和生态地球化学循环之间的新联系。植物策略和可分解性之间的这种联系对于理解植被-土壤反馈和改善全球碳循环的预测至关重要。
Worldwide decomposition rates depend both on climate and the legacy of plant functional traits as litter quality. To quantify the degree to which functional differentiation among species affects their litter decomposition rates, we brought together leaf trait and litter mass loss data for 818 species from 66 decomposition experiments on six continents. We show that: (i) the magnitude of species-driven differences is much larger than previously thought and greater than climate-driven variation; (ii) the decomposability of a species' litter is consistently correlated with that species' ecological strategy within different ecosystems globally, representing a new connection between whole plant carbon strategy and biogeochemical cycling. This connection between plant strategies and decomposability is crucial for both understanding vegetation-soil feedbacks, and for improving forecasts of the global carbon cycle.