沿着降水梯度增加的森林结构复杂性是由温带巴塔哥尼亚森林中部分收获介导的
Daniel P Soto1,2, Dominik Seidel3, Ángela Hernández-Moreno4
1Departamento de Ciencias Naturales y Tecnología, Universidad de Aysén, Coyhaique, Chile. dsoto79@gmail.com.
Scientific reports
|June 13, 2024
概括
部分森林砍伐增加了在湿地上的结构复杂性和生产力,但不是干燥的. 这凸显了降雨在森林管理中对生物多样性和生长的重要性.
科学领域:
- 林业科学 林业科学
- 生态生态学 生态生态学
- 遥感是一种远程传感.
背景情况:
- 增加森林结构复杂性是全球林业的目标.
- 关于实现这一目标,特别是长期影响的经验数据有限.
- 量化结构复杂性及其驱动因素对于有效的森林管理至关重要.
研究的目的:
- 量化部分采伐对森林结构复杂性和净初级生产率的长期影响.
- 研究降水梯度对这些效应的影响.
- 为特定地点的森林管理策略提供见解.
主要方法:
- 在巴塔哥尼亚西部利用降水梯度,有20个配对收获和未收获的1公地块.
- 使用地面激光扫描来测量站立结构复杂度指数 (SSCI).
- 使用哨兵卫星图像来导出增强的植被指数 (EVI) 作为净初级生产率的代理.
- 应用了通用的线性混合效应模型来分析SSCI,EVI,降水和收获之间的关系.
主要成果:
- 部分收获显著增加了SSCI和EVI在mesic-to-humid网站,但不是在干燥网站.
- 在较潮湿的土地上,在收获的地块上,垂直树冠更高的包装可能有助于增加复杂性和生产力.
- 降水被确定为影响SSCI和整体森林结构的关键因素.
结论:
- 森林的结构复杂性和净初级生产率对部分采伐的反应是由特定地点的降水水平调节的.
- 考虑到降水情况的特定地点的管理策略对于提高森林结构复杂性至关重要.
- 这些发现支持使用部分采伐作为一种工具,以在适当的气候条件下增加森林结构复杂性和生产力.
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