A nucleation framework for transition between alternate states: short-circuiting barriers to ecosystem recovery.

A nucleation framework for transition between alternate states: short-circuiting barriers to ecosystem recovery.
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DOI:
10.1002/ecy.3099
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发表时间:
2020-09
期刊:
影响因子:
4.8
通讯作者:
Bever JD
Bever JD
中科院分区:
环境科学与生态学1区
文献类型:
--
作者:
Michaels TK;Eppinga MB;Bever JD

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交替稳定状态理论为生态系统的快速退化提供了解释,对生态系统的保护和恢复具有重要意义。然而,利用这一理论来启动从退化到理想生态系统状态的转变仍然是一个重大挑战。替代稳定状态框架的应用目前可能受到局部尺度驱动过程和景观尺度紧急系统转变之间不匹配的阻碍。我们展示了成核理论如何在局部尺度的正反馈机制和交替稳定生态系统状态之间的景观尺度转变之间提供了一座优雅的桥梁。几何原理可以用来导出一个临界补丁半径:一个空间显式的,不稳定平衡点的局部描述。这一见解可用于得出恢复成本最小化的最佳斑块大小,并提供一个框架来衡量期望的生态系统状态对干扰和环境变化的协同效应的弹性。
The theory of alternate stable states provides an explanation for rapid ecosystem degradation, yielding important implications for ecosystem conservation and restoration. However, utilizing this theory to initiate transitions from degraded to desired ecosystem states remains a significant challenge. Applications of the alternative stable states framework may currently be impeded by a mismatch between local‐scale driving processes and landscape‐scale emergent system transitions. We show how nucleation theory provides an elegant bridge between local‐scale positive feedback mechanisms and landscape‐scale transitions between alternate stable ecosystem states. Geometrical principles can be used to derive a critical patch radius: a spatially explicit, local description of an unstable equilibrium point. This insight can be used to derive an optimal patch size that minimizes the cost of restoration, and to provide a framework to measure the resilience of desired ecosystem states to the synergistic effects of disturbance and environmental change.
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