Context

Landscape connectivity plays a key role in determining the persistence of species inhabiting fragmented habitat patches. In dynamic landscapes, most studies measure connectivity at multiple time steps, but pay less attention to explicitly quantifying its temporal dynamics to gain insights into its role in biodiversity patterns, thereby enabling more effective operational outcomes.

Objectives

This article aimed at making an overview of the existing methods for the assessment of the temporal dynamics of connectivity. By analysing their differences and possible applications, we aimed to highlight knowledge gap and future research directions.

Methods

We conducted a systematic review of literature dealing with the assessment of the temporal dynamics of connectivity and obtained 32 studies.

Results

We presented two main approaches based on graph theory and compared them from conceptual and operational perspectives. The first widely used approach, accounting only for the spatial dispersal of organisms, quantifies temporal changes in spatial connectivity. Based on two or multiple time steps in the time series, this approach enables assessment of the sense and magnitude of the temporal changes in spatial connectivity. The second recently developed approach quantifies spatio-temporal connectivity, thus accounting for both spatial and temporal dispersal. So far, this holistic assessment of spatio-temporal connectivity only covers two time steps.

Conclusion

Existing methods for the assessment of the temporal dynamics of connectivity provide indicators to advance our understanding of biodiversity patterns, and to be able to implement measures to conserve and restore connectivity. We propose future directions to develop these methods.

中文翻译：

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如何评估不断变化的景观中景观连通性的时间动态：文献综述

语境

景观连通性在确定栖息在破碎栖息地斑块中的物种的持久性方面起着关键作用。在动态景观中，大多数研究在多个时间步长测量连通性，但很少关注明确量化其时间动态以深入了解其在生物多样性模式中的作用，从而实现更有效的运营结果。

目标

本文旨在概述用于评估连通性时间动态的现有方法。通过分析它们的差异和可能的应用，我们旨在突出知识差距和未来的研究方向。

方法

我们对涉及连接性时间动态评估的文献进行了系统回顾，并获得了 32 项研究。

结果

我们提出了两种基于图论的主要方法，并从概念和操作的角度对它们进行了比较。第一种广泛使用的方法，仅考虑生物体的空间分散，量化空间连通性的时间变化。基于时间序列中的两个或多个时间步长，这种方法可以评估空间连通性的时间变化的意义和幅度。最近开发的第二种方法量化了时空连通性，从而解释了空间和时间的分散。到目前为止，这种时空连通性的整体评估仅涵盖两个时间步长。

结论

现有的评估连通性时间动态的方法提供了指标，以促进我们对生物多样性模式的理解，并能够实施保护和恢复连通性的措施。我们提出了开发这些方法的未来方向。