低功能的冗余性揭示了亚热带常青宽叶森林对环境变化的高度脆弱性
Caishuang Huang1, Yue Xu2, Runguo Zang2
1School of Ecology and Environment, Southwest Forestry University, Kunming 650224, China.
The Science of the total environment
|May 22, 2024
概括
亚热带森林具有较低的功能冗余性,稀有物种对生态系统功能至关重要. 高的物种多样性增强了对环境变化和物种丧失的抵御力.
科学领域:
- 生态生态学 生态生态学
- 环境科学 环境科学
- 保护生物学 保护生物学
背景情况:
- 人为环境变化威胁着森林的生物多样性和适应能力.
- 了解生态系统功能对多样性丧失的敏感性对于保护和弹性至关重要.
- 亚热带常青宽叶森林面临这些挑战,影响生态系统服务.
研究的目的:
- 在亚热带森林中量化功能冗余 (FR) 和功能脆弱性 (FV).
- 检查物种丧失对沿着环境梯度的功能多样性的影响.
- 确定影响生态系统功能和弹性的主要因素.
主要方法:
- 使用十个功能特征 (功能实体;FE) 的独特组合.
- 在五个亚热带地区的250个森林地块中量化FR和FV指标.
- 分析了物种丧失对功能多样性的影响,考虑到气候和土壤梯度.
主要成果:
- 亚热带森林表现出较低的功能冗余 (FR < 2),许多FE由单一物种组成.
- 稀有物种是脆弱的FE的关键贡献者.
- 种类丰富度与FE和FR正相关,而与FV负相关.
- 气候因素,特别是平均日间范围,显著影响了生态系统功能.
- 变化的温度条件导致了更高的FR和更低的FV.
结论:
- 稀有物种对生态系统功能做出了重大贡献.
- 高度多样化的亚热带森林为应激状态下的物种丧失提供了更大的保险.
- 保护战略应考虑功能特征和稀有物种在生态系统弹性方面的作用.
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