Community assembly: alternative stable states or alternative transient states?

Community assembly: alternative stable states or alternative transient states?
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DOI:
10.1111/j.1461-0248.2011.01663.x
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发表时间:
2011-10
期刊:
影响因子:
8.8
通讯作者:
Nakajima M
Nakajima M
中科院分区:
环境科学与生态学1区
文献类型:
--
作者:
Fukami T;Nakajima M

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长期以来,替代稳定状态的概念一直是研究社区集会中历史偶然性影响的主导框架。这一概念侧重于稳定状态,但许多真实的社区保持在一个短暂的状态的干扰,并在解释短暂的状态稳定状态的预测效用仍然不清楚。使用一个简单的模型,植物群落组装,我们表明,在这种条件下,历史的偶然性影响社区组装可以有很大的不同,稳定与瞬态。差异的产生是因为死亡率、环境异质性和植物-土壤反馈等因素对历史偶然性的贡献随着群落集会的进行而发生变化。我们还表明,瞬态可以持续很长一段时间相对于移民率和生成时间。这些结果认为,从替代稳定状态的概念转移到替代瞬态理解历史的偶然性,在社区集会的重点。
The concept of alternative stable states has long been a dominant framework for studying the influence of historical contingency in community assembly. This concept focuses on stable states, yet many real communities are kept in a transient state by disturbance, and the utility of predictions for stable states in explaining transient states remains unclear. Using a simple model of plant community assembly, we show that the conditions under which historical contingency affects community assembly can differ greatly for stable versus transient states. Differences arise because the contribution of such factors as mortality rate, environmental heterogeneity and plant-soil feedback to historical contingency changes as community assembly proceeds. We also show that transient states can last for a long time relative to immigration rate and generation time. These results argue for a conceptual shift of focus from alternative stable states to alternative transient states for understanding historical contingency in community assembly.
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