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首页> 外文期刊>Open Journal of Forestry >Understory Recovery in Coast Redwood Communities: A Case Study Comparing a Naturally Recovering and an Actively Managed Forest
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Understory Recovery in Coast Redwood Communities: A Case Study Comparing a Naturally Recovering and an Actively Managed Forest

机译：海岸红木社区的林下植被恢复：比较自然恢复林和积极管理森林的案例研究

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Restoration of late seral features in second growth Sequoia sempervirens (coast redwood) forests is increasingly important, as so little of the original old-growth remains. Natural recovery is an effective method restoring many late seral features, and does not require the additional disturbance of active management. In order to better understand management impacts on redwood understory abundance and composition, data were collected in naturally recovering stands and in stands that were actively managed with the explicit intent of promoting old-growth characteristics. Ten 10 m diameter plots with three 2 m diameter nested sub-plots were randomly sampled in two sites within each management type. Results indicate that tree canopy cover, native species cover and richness, richness of coast redwood associated species, and the cover of Trillium ovatum (western wake robin) were significantly higher in naturally recovering versus actively managed stands. In addition, several coast redwood associated understory species were exclusively recorded in the naturally recovering stands including: Asuram caudatum (wild ginger), Prosartes hookeri (hooker’s fairybells), Maianthemum racemosum (false solomon seal), Scoliopus bigelovii (fetid adder’s tongue), Viola sempervirens (redwood violet); while only one such species was recorded exclusively in the actively managed stands: Trientalis latifolia (pacific star flower). Natural recovery appeared to support understory recovery more effectively than active forest management in this case.
机译：在第二生长的红杉（沿海红木）森林中恢复后期的血清特征变得越来越重要，因为原来的旧生长物很少。自然恢复是恢复许多晚期血清学特征的有效方法，不需要主动管理的额外干扰。为了更好地了解管理对红木林下丰度和组成的影响，在自然恢复林分中以及在旨在促进陈旧性的明确意图下积极管理的林分中收集数据。在每种管理类型的两个位置中，随机抽取10个10 m直径的地块和三个2 m直径的嵌套子图。结果表明，在自然恢复的林分中，树冠的覆盖度，本地物种的覆盖度和丰富度，海岸红木相关物种的丰富度以及延龄草的覆盖度在自然恢复状态下显着高于主动管理的林分。此外，在自然恢复的林分中还专门记录了几种与海岸红木相关的林下物种，包括： Asuram caudatum（野生姜）， Prosartes hookeri（虎神仙子）， Maianthemum racemosum（假所罗门海豹）， Scoliopus bigelovii（臭脚舌），中提琴（紫红色紫罗兰）;而在主动管理的林分中仅记录了一种这样的物种： Trientalis latifolia（太平洋之星花）。在这种情况下，自然恢复似乎比主动森林管理更有效地支持林下恢复。

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