Grimm V, Wissel Christian
UFZ Centre for Environmental Research Leipzig-Halle, Department of Ecological Modelling, P.O. Box 2, D-04301 Leipzig, Germany, , , , , , DE.
Oecologia. 1997 Feb;109(3):323-334. doi: 10.1007/s004420050090.
We present an inventory and analysis of discussions of ecological stability, considering 163 definitions of 70 different stability concepts. Our aim is to derive a strategy that can help to dispel the existing "confusion of tongues" on the subject of "stability" and prevent its future recurrence. The strategy consists of three questions that should be kept in mind when communicating about stability properties. These three questions should overcome the three main sources of confusion in terminology. Firstly, which stability properties are being addressed in the stability statement? Our analysis shows that the general term "stability" is so ambiguous as to be useless.It can be replaced by the stability properties "staying essentially unchanged" (constancy), "returning to the reference state (or dynamic) after a temporary disturbance" (resilience), and "persistence through time of an ecological system" (persistence). Second, to what ecological situation does the statement refer? An ecological situation is defined by a set of features that, taken as a whole, determine the domain of validity of a stability statement. The six most important features form the "ecological checklist", which serves to classify ecological situations and thereby provides a system of coordinates for communication. The six points are: variable of interest, level of description, reference state, disturbance, spatial scale and temporal scale. Thirdly, is the statement anchored in the situation in question, or is there unacceptable generalisation by inferring "stability" of the whole system from a certain stability property in a certain ecological ecological situation? This question separates the scientifically valuable content of a statement from the desire for general statements which is often projected through stability statements.
我们展示了一份关于生态稳定性讨论的清单及分析,考量了70种不同稳定性概念的163种定义。我们的目标是得出一种策略,以帮助消除在“稳定性”主题上现有的“语言混乱”现象,并防止其未来再次出现。该策略包含在交流稳定性属性时应牢记的三个问题。这三个问题应能克服术语方面的三个主要混淆源头。首先,稳定性陈述中涉及哪些稳定性属性?我们的分析表明,“稳定性”这一通用术语过于模糊,毫无用处。它可被“基本保持不变”(恒定性)、“在暂时干扰后恢复到参考状态(或动态)”(恢复力)以及“生态系统随时间的持续存在”(持久性)这些稳定性属性所取代。其次,该陈述指的是何种生态情形?一种生态情形由一组特征所定义,这些特征作为一个整体决定了稳定性陈述的有效性范围。六个最重要的特征构成了“生态清单”,用于对生态情形进行分类,从而为交流提供一个坐标系统。这六点分别是:感兴趣的变量、描述层次、参考状态、干扰、空间尺度和时间尺度。第三,该陈述是基于所讨论的情形,还是通过从某一特定生态情形中的某种稳定性属性推断整个系统的“稳定性”而存在不可接受的泛化?这个问题将陈述中有科学价值的内容与通常通过稳定性陈述所投射的对一般性陈述的渴望区分开来。