木材和小径:低强度的选择性伐木和大象的小径塑造了非洲热带森林的苗木动态
Megan K Sullivan1,2, Luke Browne1, Prince Armel Mouguiama Bissiemou3
1School of the Environment, Yale University, New Haven, Connecticut, USA.
概括
非常低强度的选择性伐木暂时改变了热带森林底层的动态,影响了苗木的生存和生长. 森林恢复轨迹在很大程度上保持不变,这表明管理热带森林的保护和连接潜力.
科学领域:
- 热带生态 热带生态
- 林业科学 林业科学
- 保护生物学 保护生物学
背景情况:
- 选择性伐木平衡了热带森林的保护和土地利用.
- 了解伐木对森林再生的影响对于未来森林组成至关重要.
- 极低强度的伐木 (<2棵树/ha-1) 是一种常见的做法,其生态后果受到争论.
研究的目的:
- 调查非常低强度的选择性伐木对底层条件和苗木动态的影响.
- 评估森林恢复阶段 (未采伐,积极采伐,采伐后4年,采伐后14年).
- 为了确定砍伐对柳叶树和树苗动态的影响.
主要方法:
- 评估了树冠的开放性,植被损害,以及整个伐木时间序列中的大象踪迹的流行程度.
- 与苗木生存,生长和招募相关的底层因素.
- 在不同伐木恢复阶段,比较了苗木动态 (生存,生长,招募) 和柳与树苗的反应.
主要成果:
- 砍伐的森林在砍伐后4年内增加了树冠的开放性和植被损害,14年后象步道的流行率更高.
- 较低的苗木存活率被观察到与更大的树冠开放,植被损害,和大象的踪迹.
- 虽然积极采伐的森林最初减少了苗木的生存和招募,但在采伐后的14年内,动态在很大程度上恢复了,带来了略微的树苗木生长优势.
结论:
- 非常低强度的选择性伐木会导致临时的地下森林转移,但不会改变长期的森林恢复轨迹.
- 经营的热带森林可以作为重要的生态走廊,支持生物多样性和野生动物保护.
- 这些发现支持低强度砍伐森林的潜力,有助于实现保护目标,例如其他有效的基于面积的保护措施 (OECM).
关键词:
非洲森林是非洲的森林.在OECM中,OECM是OECM,OECM是OECM大象的踪迹 象的踪迹李安纳斯 (Lianas) 是一个的植物.苗木的动态 苗木的动态选择性采伐采伐采伐采伐采伐采伐采伐采伐采伐采伐采伐采伐采伐采伐采伐采伐采伐采伐采伐采伐采伐采伐采伐采伐采伐采伐采伐采伐采伐采伐采伐采伐采伐采伐采伐采伐采伐采伐采伐采伐采伐采伐采伐采伐采伐采伐采伐采伐采伐采伐采伐采伐采伐采伐采伐采伐采伐采伐采伐采伐采伐采伐采伐采伐采伐采伐采伐采伐采伐采伐采伐采伐采伐采伐采伐采伐采伐采伐采伐采伐采伐采伐采伐采伐采伐采伐采伐采伐采伐采伐采伐采伐采伐采伐采伐采伐采伐采伐采伐采伐采伐采伐热带雨林的热带森林是什么
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