Spatiotemporal dynamics of prairie wetland networks: power-law scaling and implications for conservation planning.
Spatiotemporal dynamics of prairie wetland networks: power-law scaling and implications for conservation planning.
复制标题
草原湿地网络的时空动态：幂律尺度及其对保护规划的影响。
DOI：
10.1890/09-0865.1
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发表时间：
2010
期刊：
影响因子：
4.8
通讯作者：
C. Wright
中科院分区：
文献类型：
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作者：
C. Wright
虽然栖息地网络显示出在区域尺度上的保护规划的承诺，其时空动态还没有得到很好的研究，特别是在气候敏感的景观。在这里，我使用卫星遥感汇编湿地栖息地网络从草原坑洼地区（PPR）的北美。跨越从洪水到干旱的水文梯度和一系列代表性传播距离组装的网络集合表现出重要拓扑参数的幂律缩放。草原湿地网络是一种“中观世界”，其平均拓扑距离随着网络规模的增加比小世界网络更快，但比规则网格（或“大世界”）更慢。这种规模意味着通过湿地网络的快速扩散，而没有与“小世界”相关的一些风险（例如，疾病或干扰的快速传播）。湿地网络的回顾性分析建立了一个气候信封的景观连接在PPR，在那里我表明，气候变化可能会严重影响集合种群的生存能力，并限制长距离扩散和范围的变化。更一般地说，这项研究展示了一种有效的方法来保护规划的抽象层次解决全球生物多样性危机的关键驱动因素：栖息地破碎化和气候变化。
Although habitat networks show promise for conservation planning at regional scales, their spatiotemporal dynamics have not been well studied, especially in climate-sensitive landscapes. Here I use satellite remote sensing to compile wetland habitat networks from the Prairie Pothole Region (PPR) of North America. An ensemble of networks assembled across a hydrologic gradient from deluge to drought and a range of representative dispersal distances exhibits power-law scaling of important topological parameters. Prairie wetland networks are "meso-worlds" with mean topological distance increasing faster with network size than small-world networks, but slower than a regular lattice (or "large world"). This scaling implies rapid dispersal through wetland networks without some of the risks associated with "small worlds" (e.g., extremely rapid propagation of disease or disturbance). Retrospective analysis of wetland networks establishes a climatic envelope for landscape connectivity in the PPR, where I show that a changing climate might severely impact metapopulation viability and restrict long-distance dispersal and range shifts. More generally, this study demonstrates an efficient approach to conservation planning at a level of abstraction addressing key drivers of the global biodiversity crisis: habitat fragmentation and climatic change.