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全球南方的人类足迹加速了生态敏感地区的生物质碳损失
Mengqing Geng1, Xuecao Li1,2, Haowei Mu3
1College of Land Science and Technology, China Agricultural University, Beijing, China.
Global change biology
|August 11, 2023
概括
人类活动正在增加全球人类足迹 (HFP),导致地面生物质碳 (AGBC) 损失显著,特别是在热带地区. 保护陆地生态系统需要仔细规划,以减轻气候变化影响.
科学领域:
- 生态生态学 生态生态学
- 环境科学 环境科学
- 气候变化研究 气候变化研究
背景情况:
- 人类活动对陆地生物圈施加了相当大的压力,导致生态系统退化和碳损失.
- 人类活动对陆地生物质碳的综合影响仍未得到充分理解.
- 全球人类足迹 (HFP) 已经明显增加,改变了息地,推动了生态系统的变化.
研究的目的:
- 研究2000年至2018年间全球人类足迹 (HFP) 变化与人类引起的地表生物质碳 (AGBC) 损失之间的关系.
- 量化归因于HFP扩张的AGBC损失的程度.
- 评估AGBC脆弱性的区域差异,特别是在全球北方和全球南方之间.
主要方法:
- 对2000年至2018年全球人类足迹 (HFP) 数据的分析.
- 在同一时期,量化人类引起的地面生物质碳 (AGBC) 损失.
- 在全球不同生物圈和地区对HFP和AGBC变化的比较分析.
主要成果:
- 观察到HFP在全球范围内持续增加,将荒野转化为高度修改的景观.
- 加快的AGBC损失与HFP扩张直接相关,从2000年到2018年总计为19.99 ± 0.196 PgC.
- 热带和亚热带地区经历了最重要的息地变化和AGBC损失.
- 全球南方的地面生物质碳 (AGBC) 比全球北方更容易受到人类活动的影响.
- 即使在严格保护的区域内也检测到不断增加的AGBC损失,这突显了人类活动的普遍影响.
结论:
- 人类活动,反映在扩大HFP,是全球实质性地表生物质碳 (AGBC) 损失的主要驱动因素.
- 在全球北方和全球南方之间,AGBC的脆弱性显著不同,后者面临更大的风险.
- 有效的保护策略和科学指导的规划对于减轻未来的碳损失和保护陆地生态系统至关重要.
- 应对气候变化和城市化需要采取综合方法来保护生物多样性和生态系统服务,可能通过保护地球一半等举措.
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