在依赖洪水的多树龄森林中,恢复性疏伐加速了小树的生长,但可能会减缓大树的生长

IF 5 1区 环境科学与生态学 Q1 BIODIVERSITY CONSERVATION Journal of Applied Ecology Pub Date : 2024-05-11 DOI:10.1111/1365-2664.14668
Emma Gorrod, Laura White, Michael Bedward, Ben Hope, Nicholas Chu, Danielle McAllister
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引用次数: 0

摘要

大树的减少正在全球范围内发生,对生物多样性和碳封存产生了重要影响。恢复性疏伐是一种潜在的管理措施,可加速树木生长并促进森林中大树的发展,但试验数量有限,结果也不尽相同。由于长期的商业木材采伐和河流治理,澳大利亚的河流红桉林经历了大面积的木质增厚和大树减少,我们开展了一项大规模试验,以确定恢复性疏伐是否能加速大树的生长。在 44 个 9 公顷的地块上进行了疏伐,方法是从保留树木周围移除直径为 40 厘米的树木,间距不等。最初的树木密度从每公顷 ~260 棵到 ~1860 棵不等,8%-86% 的树木被疏伐掉。我们在疏伐前对 1980 棵树木进行了监测,并在疏伐后的 5 年中每年进行一次监测。我们测试了疏伐强度对不同大小树木直径生长的影响,并探讨了长期和短期水供应是否会影响结果。疏伐促进了小树<56厘米直径的生长,尤其是在潮湿年份的干旱地区。在较潮湿的地方,较高的疏伐强度降低了大树(直径不小于 79.5 厘米)的生长率。对于中型和大型树木来说,长期和短期的水供应比树木密度造成的竞争对树木生长的影响更大。综述与应用。在所有树木都很小的河流红胶幼林中,恢复性疏伐可能会加速树木的生长。但在多树龄森林中,恢复性疏伐可能无效或有害,因为在多树龄森林中,目标是促进已是中大型树木的生长速度。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

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Restoration thinning accelerates small tree growth but may slow large tree growth in a multi-age flood-dependent forest

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来源期刊
Journal of Applied Ecology
Journal of Applied Ecology 环境科学-生态学
CiteScore
9.80
自引率
3.50%
发文量
229
审稿时长
4.5 months
期刊介绍: Journal of Applied Ecology publishes novel, high-impact papers on the interface between ecological science and the management of biological resources.The editors encourage contributions that use applied ecological problems to test and develop basic theory, although there must be clear potential for impact on the management of the environment.
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