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首页> 外文期刊>Canadian Journal of Forest Research >Long-term pine regeneration, shrub layer dynamics, and understory community composition responses to repeated prescribed fire in Pinus resinosa forests
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Long-term pine regeneration, shrub layer dynamics, and understory community composition responses to repeated prescribed fire in Pinus resinosa forests

机译：长期松树再生，灌木层动力学和林下社区成分反复在鸬鹚林中重复规定的火灾

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Prescribed fire is increasingly viewed as a valuable tool for reversing ecological consequences of fire suppression within fire-adapted forests. While the use of burning treatments in northern temperate conifer forests has received considerable attention, the long-term (&10 year) effects on understory composition and dynamics have not been quantified. We describe the persistence of prescribed fire effects on the woody and herbaceous understory in a mature red pine (Pinus resinosa Ait.) forest in northern Minnesota, USA, over a similar to 50-year period, as well as the relative roles of fire season and frequency in affecting vegetation responses. Burning treatments were applied from 1960 to 1970 on 0.4 ha experimental units and crossed fire season and frequency in a randomized block design. Burning altered shrub layer dynamics and composition in both the short and long terms and was influenced by both fire season and frequency, with frequent summer season burns having the largest impact, including greatest control of hazel (Corylus spp.). The application of fire facilitated regeneration of pine; however, recruitment into the overstory was limited. Additionally, community composition of the herbaceous understory diverged 40+ years following burning. This study highlights the importance of continued burning in affecting vegetation responses and the potential of fire as a long-lasting vegetation management tool in these forests.
机译：规定的火越来越多地被视为逆转火灾适应森林中的火灾镇压生态后果的宝贵工具。虽然在北方温带针叶树林中使用燃烧治疗森林，但长期（＆amp; 10年）对床骨构成和动力学的影响尚未被量化。我们描述了在美国北部的成熟红松（Pinus Resolosa Ait）森林中的树木大学和草本植物的规定的火灾影响的持续存在。影响植被反应的频率。在0.4公顷的实验单元上从1960年到1970年应用燃烧处理，并在随机块设计中交叉火季和频率。燃烧改变的灌木层动力学和组合在短期和长期以来，受火季和频率的影响，频繁夏季燃烧具有最大的影响，包括对榛子的最大控制（Corylus SPP。）。防火促进松树的应用;但是，招募过度限制。此外，草本植物的群落组成在燃烧后40多年偏离了40多年。本研究突出了持续燃烧在影响植被响应和火灾潜力作为这些森林的持久植被管理工具的重要性。

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