Riparian forests link terrestrial and freshwater communities and therefore understanding the landscape context of fire regimes in these forests is critical to fully understanding the landscape ecology. However, few direct studies of fire regimes exist for riparian forests, especially in the landscape context of adjacent upland forests or studies of long-term climate drivers of riparian forest fires. We reconstructed a low-severity fire history from tree rings in 38 1-ha riparian plots and combined them with existing fire histories from 104 adjacent upland plots to yield 2633 fire scars sampled on 454 trees. Historically (1650–1900), low-severity fires burned more frequently in upland than in riparian plots, but this difference was not significant (P = 0.15). During more than half of the fire years at both sites, fires were extensive and burned synchronously in riparian and upland plots, and climate was significantly dry during these years. However, climate was not significantly dry when fires burned in only one plot type. Historically, entire riparian zones likely burned in these two study sites of the Blue Mountains during dry years. This study suggests that riparian and upland forests could be managed similarly, especially given the projected increases to fire frequency and intensity from impending climate change.

中文翻译：

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在美国俄勒冈州东部（公元 1650-1900 年）干旱年份，河岸和邻近的高地森林同步燃烧

河岸森林将陆地和淡水社区联系起来，因此了解这些森林中火灾状况的景观背景对于充分了解景观生态至关重要。然而，很少有关于河岸森林火灾状况的直接研究，特别是在邻近山地森林的景观背景或河岸森林火灾的长期气候驱动因素的研究中。我们从 38 个 1 公顷河岸地块的树轮重建了低严重度火灾历史，并将它们与来自 104 个相邻高地地块的现有火灾历史相结合，在 454 棵树上采样产生了 2633 个火痕。从历史上看（1650-1900），低烈度火灾在高地比在河岸地块更频繁地燃烧，但这种差异并不显着（P = 0.15）。在两个地点超过一半的火灾年中，河岸地块和高地地块的火灾范围广泛并同步燃烧，这些年来气候明显干燥。然而，当火灾仅在一种地块类型中燃烧时，气候并未显着干燥。从历史上看，在干旱年份，蓝山的这两个研究地点可能会烧毁整个河岸带。这项研究表明，河岸和高地森林可以进行类似的管理，特别是考虑到即将发生的气候变化会导致火灾频率和强度增加。