Early warning signals of ecological transitions: methods for spatial patterns.

Early warning signals of ecological transitions: methods for spatial patterns.
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DOI:
10.1371/journal.pone.0092097
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发表时间:
2014
期刊:
影响因子:
3.7
通讯作者:
Dakos V
Dakos V
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Kéfi S;Guttal V;Brock WA;Carpenter SR;Ellison AM;Livina VN;Seekell DA;Scheffer M;van Nes EH;Dakos V

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许多生态系统可以在不同的稳定状态之间表现出突然的转变。由于其重要的生态和经济后果,最近的研究集中在设计早期预警信号来预测这种突然的生态转变。特别是,理论研究表明,系统空间特征的变化可以为即将到来的过渡提供早期预警。然而,这些指标的实证验证滞后于它们的理论发展。在这里,我们总结了一系列目前可用的空间预警信号,提出了潜在的零模型来解释它们的趋势,并将它们应用于三个正在经历突变的系统的模拟空间数据集。除了提供将这些信号应用于空间数据集的逐步方法外,我们还提出了一个统计工具箱,可用于帮助检测大范围空间数据中的接近过渡。我们希望我们的方法和计算机代码将促进空间预警信号在真实空间数据上的应用和测试。
A number of ecosystems can exhibit abrupt shifts between alternative stable states. Because of their important ecological and economic consequences, recent research has focused on devising early warning signals for anticipating such abrupt ecological transitions. In particular, theoretical studies show that changes in spatial characteristics of the system could provide early warnings of approaching transitions. However, the empirical validation of these indicators lag behind their theoretical developments. Here, we summarize a range of currently available spatial early warning signals, suggest potential null models to interpret their trends, and apply them to three simulated spatial data sets of systems undergoing an abrupt transition. In addition to providing a step-by-step methodology for applying these signals to spatial data sets, we propose a statistical toolbox that may be used to help detect approaching transitions in a wide range of spatial data. We hope that our methodology together with the computer codes will stimulate the application and testing of spatial early warning signals on real spatial data.
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发表时间: 2011-12-01
期刊: ECOGRAPHY
影响因子: 5.9
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