Reforestation and restoration efforts have traditionally relied on “local” seed sources as planting stock. The term “local” has different meanings in different locales, since no single set of seedcollection zones has yet been widely adopted across the eastern United States. Given concerns about mitigating the effects of climate change, forest managers are increasingly seeking to move seed sources in a process called assisted migration, which would be facilitated if a common set of seed-collection zones were available. We developed a map of 245 seed-collection zones for 37 states by combining two ecologically important layers: plant hardiness zones and ecoregions. These new seed-collection zones should be used by seed collectors and nurseries to describe the origin of seed for plants and trees in the eastern United States. Common garden studies remain the gold standard for determining how far to move seed from any particular seed-collection zone. For species that have not been field-tested, seed movement that is limited either within a seedcollection zone or between adjacent seed-collection zones is a reasonable general guideline.

中文翻译：

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美国东部新的种子收集区：东部种子区论坛

重新造林和恢复工作传统上依赖“本地”种子资源作为种植资源。“本地”一词在不同地区有不同的含义，因为在美国东部还没有一套单一的种子收集区被广泛采用。鉴于对减轻气候变化影响的担忧，森林管理人员越来越多地寻求在称为辅助迁移的过程中转移种子来源，如果有一组通用的种子收集区可用，这将有助于实现这一目标。我们通过结合两个重要的生态层：植物抗寒区和生态区，绘制了 37 个州的 245 个种子收集区的地图。种子收集者和苗圃应使用这些新的种子收集区来描述美国东部植物和树木种子的来源。常见的花园研究仍然是确定将种子从任何特定种子收集区移出多远的黄金标准。对于未经田间试验的物种，限制种子收集区内或相邻种子收集区之间的种子移动是合理的一般准则。