Defining and quantifying the resilience of responses to disturbance: a conceptual and modelling approach from soil science.
Defining and quantifying the resilience of responses to disturbance: a conceptual and modelling approach from soil science.
复制标题
DOI：
10.1038/srep28426
复制
发表时间：
2016-06-22
影响因子：
4.6
通讯作者：
Whitmore AP
中科院分区：
文献类型：
--
作者：
Todman LC;Fraser FC;Corstanje R;Deeks LK;Harris JA;Pawlett M;Ritz K;Whitmore AP
关于环境系统的复原力，有几个概念性定义，即使在特定背景下明确界定了复原力，也难以量化。我们确定了系统功能对干扰的响应的四个特征，这些特征与“弹性”有关：（1）功能返回到参考水平的程度;（2）达到新的准稳定状态所需的时间;（3）速率。（即梯度），在该函数达到新的状态;（4）在达到新状态之前函数的累积幅度（即曲线下的面积）。我们开发的指标，以量化这些特性的基础上与机械弹簧和阻尼器系统的类比。使用的土壤功能（呼吸）的干扰响应的例子，我们证明了这些指标有效地区分动态响应的关键特征。虽然这些特征中的任何一个都可以定义弹性，但每一个都可能导致不同的见解和结论。因此，必须根据不同的情况确定弹性反应的突出特性。由于数据的时间分辨率会影响这些指标的准确确定，因此我们建议在预期响应的时间范围内至少进行12次测量。
There are several conceptual definitions of resilience pertaining to environmental systems and, even if resilience is clearly defined in a particular context, it is challenging to quantify. We identify four characteristics of the response of a system function to disturbance that relate to “resilience”: (1) degree of return of the function to a reference level; (2) time taken to reach a new quasi-stable state; (3) rate (i.e. gradient) at which the function reaches the new state; (4) cumulative magnitude of the function (i.e. area under the curve) before a new state is reached. We develop metrics to quantify these characteristics based on an analogy with a mechanical spring and damper system. Using the example of the response of a soil function (respiration) to disturbance, we demonstrate that these metrics effectively discriminate key features of the dynamic response. Although any one of these characteristics could define resilience, each may lead to different insights and conclusions. The salient properties of a resilient response must thus be identified for different contexts. Because the temporal resolution of data affects the accurate determination of these metrics, we recommend that at least twelve measurements are made over the temporal range for which the response is expected.