Flooding disturbances increase resource availability and productivity but reduce stability in diverse plant communities
Flooding disturbances increase resource availability and productivity but reduce stability in diverse plant communities
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DOI：
10.1038/ncomms7092
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发表时间：
2015-01
影响因子：
16.6
通讯作者：
A. Wright;A. Ebeling;H. de Kroon;C. Roscher;A. Weigelt;N. Buchmann;Tina Buchmann;C. Fischer;
中科院分区：
文献类型：
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作者：
A. Wright;A. Ebeling;H. de Kroon;C. Roscher;A. Weigelt;N. Buchmann;Tina Buchmann;C. Fischer;
自然界越来越多地被变化所定义。在未来100年内，不断上升的大气二氧化碳浓度将继续增加极端天气事件的频率和强度。与此同时，人类活动正在减少全球生物多样性，目前的物种灭绝率是人类统治地球生态系统之前的1000倍。这些趋势的共同出现可能特别值得关注，因为更大的生物多样性可以帮助生态系统在大扰动期间抵抗变化。我们使用200年一次洪水事件的数据表明，当扰动与资源可用性增加相关时，可能会出现相反的情况。洪水与生产力的增加和稳定性的降低有关，特别是在多样性最高的群落中。我们的研究结果在资源可用性增加的大量干扰中破坏了生物多样性稳定性假设的效用。我们提出了一个可以广泛应用于自然干扰的概念框架。
The natural world is increasingly defined by change. Within the next 100 years, rising atmospheric CO2concentrations will continue to increase the frequency and magnitude of extreme weather events. Simultaneously, human activities are reducing global biodiversity, with current extinction rates at ~1,000 × what they were before human domination of Earth’s ecosystems. The co–occurrence of these trends may be of particular concern, as greater biological diversity could help ecosystems resist change during large perturbations. We use data from a 200–year flood event to show that when a disturbance is associated with an increase in resource availability, the opposite may occur. Flooding was associated with increases in productivity and decreases in stability, particularly in the highest diversity communities. Our results undermine the utility of the biodiversity–stability hypothesis during a large number of disturbances where resource availability increases. We propose a conceptual framework that can be widely applied during natural disturbances.