Patterns of alien plant distribution at multiple spatial scales in a large national park: implications for ecology, management and monitoring
Patterns of alien plant distribution at multiple spatial scales in a large national park: implications for ecology, management and monitoring
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DOI：
10.1111/j.1472-4642.2008.00544.x
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发表时间：
2009-05-01
影响因子：
4.6
通讯作者：
MacFadyen, Sandra
中科院分区：
文献类型：
--
作者：
Foxcroft, Llewellyn C.;Richardson, David M.;MacFadyen, Sandra
空间尺度对于理解和管理生物入侵至关重要。在管理外来植物入侵提供方向，非常重视收集空间上明确的数据。然而，往往没有充分考虑如何使用数据，经常导致数据不兼容，用于不同的用途。本文以南非克鲁格国家公园为研究对象，利用27,000份外来入侵植物的空间记录，探讨了空间尺度在解释、管理和监测外来植物入侵中的作用（> 20，（2）第二章我们在9个不同的分辨率尺度上评估了每个细胞的外来植物物种丰富度。虽然在分辨率的尺度上，在四分之一度网格和第四纪流域（南非河流流域分类系统的第四级类别）的尺度上工作时，获得了几乎相同的结果。同样，从0.1-0.5 km和1-5 km分辨率的工作中获得的见解是相似的。在0.1 x 0.1 km的单元格尺度下，只有0.4%的克鲁格国家公园被入侵，而在四分之一度单元格分辨率下，超过90%的公园被入侵。在评估外来植物入侵的分布和丰度、了解生态过程以及实施管理应用和监测策略时，选择适当的分辨率尺度至关重要。四分之一度网格和第四纪流域在区域或国家尺度上最有用。1至25公里（2）的网格单元通常可用于确定管理干预措施的优先次序和规划管理干预措施。细比例尺数据有助于为面积小的地区的管理提供信息;它们还提供了适当的细节，以评估入侵的模式和速度。
Spatial scale is critical for understanding and managing biological invasions. In providing direction to managing alien plant invasions, much emphasis is placed on collecting spatially explicit data. However, insufficient thought is often given to how the data are to be used, frequently resulting in the incompatibility of the data for different uses. This paper explores the role of spatial scale in interpreting, managing and monitoring alien plant invasions in a large protected area.Kruger National Park, South Africa.Using 27,000 spatially-explicit records of invasive alien plants for the Kruger National Park (> 20,000 km(2)) we assessed alien plant species richness per cell at nine different scales of resolution.When assessing the patterns of alien plants at the various scales of resolution, almost identical results are obtained when working at scales of quarter-degree grids and quaternary watersheds (the fourth level category in South Africa's river basin classification system). Likewise, insights gained from working at resolutions of 0.1-0.5 km and 1-5 km are similar. At a scale of 0.1 x 0.1 km cells, only 0.4% of the Kruger National Park is invaded, whereas > 90% of the park is invaded when mapped at the quarter-degree cell resolution.Selecting the appropriate scale of resolution is crucial when evaluating the distribution and abundance of alien plant invasions, understanding ecological processes, and operationalizing management applications and monitoring strategies. Quarter-degree grids and quaternary watersheds are most useful at a regional or national scale. Grid cells of 1 to 25 km(2) are generally useful for establishing priorities for and planning management interventions. Fine-scale data are useful for informing management in areas which are small in extent; they also provide the detail appropriate for assessing patterns and rates of invasion.