IDENTIFICATION OF PUTATIVE GEOGRAPHICALLY ISOLATED WETLANDS OF THE CONTERMINOUS UNITED STATES
IDENTIFICATION OF PUTATIVE GEOGRAPHICALLY ISOLATED WETLANDS OF THE CONTERMINOUS UNITED STATES
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DOI：
10.1111/1752-1688.12421
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发表时间：
2016-06-01
影响因子：
2.4
通讯作者：
D'Amico, Ellen
中科院分区：
文献类型：
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作者：
Lane, Charles R.;D'Amico, Ellen
地理隔离湿地（GIW）是完全被高地包围的湿地。虽然这种现象在美国很常见，但迄今为止还没有全国范围内的、在空间上明确的 GIW 范围估计，这使得了解 GIW 的无数生物地球化学、水文和栖息地功能变得复杂，并阻碍了地方、州和国家尺度的保护和管理工作。我们使用 10 米地理空间缓冲区作为国家湿地清单沼泽和湖泊湿地系统与国家地图和可用溪流、河流和湖泊数据的水文或生态连通性的代理。我们在美国本土确定了超过 830 万个假定的 GIW，涵盖近 650 万公顷的湿地资源（平均面积 0.79 +/- 4.81 公顷，中位面积 0.19 公顷）。因此，推定的 GIW 约占美国本土淡水湿地的 16%。大多数推定的 GIW 的水情都受到暂时或季节性洪水的影响，这表明它们容易受到开沟或水文抽取、沉积或降水模式改变的影响。这种现成的地理空间明确制图产品的其他分析应用（例如，水文模型、两栖动物集合种群或景观生态分析）将提高我们对 GIW 的丰度和范围、影响、连通性以及对美国本土其他水生系统的相对重要性的理解。
Geographically isolated wetlands (GIWs) are wetlands completely surrounded by uplands. While common throughout the United States (U.S.), there have heretofore been no nationally available, spatially explicit estimates of GIW extent, complicating efforts to understand the myriad biogeochemical, hydrological, and habitat functions of GIWs and hampering conservation and management efforts at local, state, and national scales. We used a 10-m geospatial buffer as a proxy for hydrological or ecological connectivity of National Wetlands Inventory palustrine and lacustrine wetland systems to nationally mapped and available stream, river, and lake data. We identified over 8.3 million putative GIWs across the conterminous U.S., encompassing nearly 6.5 million hectares of wetland resources (average size 0.79 +/- 4.81 ha, median size 0.19 ha). Putative GIWs thus represent approximately 16% of the freshwater wetlands of the conterminous U.S. The water regime for the majority of the putative GIWs was temporarily or seasonally flooded, suggesting a vulnerability to ditching or hydrologic abstraction, sedimentation, or alterations in precipitation patterns. Additional analytical applications of this readily available geospatially explicit mapping product (e.g., hydrological modeling, amphibian metapopulation, or landscape ecological analyses) will improve our understanding of the abundance and extent, effect, connectivity, and relative importance of GIWs to other aquatic systems of the conterminous U.S.