阿尔法和β多样性共同推动温带和热带森林的地表生物质
Jie Yao1,2, Jihong Huang1,2, Runguo Zang1,2
1Ecology and Nature Conservation Institute, Chinese Academy of Forestry Key Laboratory of Forest Ecology and Environment of National Forestry and Grassland Administration Beijing China.
Ecology and evolution
|September 4, 2023
概括
生物多样性改变了生态系统的功能,但规模很重要. 这项研究揭示了树木多样性和空间模式如何影响中国不同规模的森林生物质.
科学领域:
- 生态生态学 生态生态学
- 森林科学 森林科学 森林科学
- 生物多样性研究 生物多样性研究
背景情况:
- 生物多样性和生态系统功能 (BEF) 研究往往受到小空间尺度的限制.
- 生物多样性对跨越各种空间尺度的生态系统功能的影响仍然未被充分探索.
- 贝塔多样性 (物种组成的空间异质性) 在BEF关系中的作用在很大程度上缺失.
研究的目的:
- 研究温带和热带森林中树木多样性和地表生物量 (AGB) 之间的规模依赖关系.
- 评估物种空间异质性对AGB的影响.
- 了解驱动这些跨空间尺度的关系的潜在机制 (互补性和选择性).
主要方法:
- 利用了来自中国4个6公森林动态图片的植被和功能特征数据.
- 在多个空间粒度上分析了生物多样性-生态系统的功能关系.
- 研究了α多样性,β多样性和功能特征对AGB的影响.
主要成果:
- 在热带森林中,物种丰富性对AGB的影响随着规模的扩大而减少,而功能性主导性则增加.
- 在温带森林中,积极的多样性-AGB关系在各个尺度上持续存在,在较小的尺度上更强.
- 在两种森林类型中,β多样性与AGB正相关,尽管比α多样性影响较小.
结论:
- 生物多样性对生态系统运作的影响是规模依赖的.
- 贝塔多样性反映了物种空间周转,对生态系统的功能产生了积极的影响,应纳入BEF研究.
- 结果支持互补性和选择性假设,以规模依赖的优势地位,并对森林管理产生影响.
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