二级和退化热带雨林的碳汇
Viola H A Heinrich1,2, Christelle Vancutsem3,4, Ricardo Dalagnol5,6,7
1School of Geographical Sciences, University of Bristol, Bristol, UK. viola.heinrich@bristol.ac.uk.
Nature
|March 16, 2023
概括
恢复热带森林是重要的碳汇, 保护这些重新生长的森林为未来的碳捕获提供了巨大的潜力.
科学领域:
- 生态学
- 气候科学
- 森林管理
背景情况:
- 由于气候变化,森林砍伐,火灾和伐木,
- 恢复的热带二级森林和退化森林占地面积很大 (约1万平方公里). 但它们的碳积累能力是不确定的.
研究的目的:
- 量化亚马逊,婆罗洲和中非地区恢复的热带森林的地表碳沉积量.
- 分析退化和二级森林中碳积累的空间和时间模式.
- 确定影响森林再生和碳捕获的环境和人为因素.
主要方法:
- 使用卫星数据产品分析森林生长的异质模式.
- 随着时间的推移,恢复森林中的量化地面碳 (AGC) 积累.
- 评估环境因素 (温度,水资源短缺) 和干扰制度对再生率的影响.
主要成果:
- 在1984年至2018年期间,再生森林平均积累了107 Tg C年−1 (90-130 Tg C年−1).
- 这种累积在同一时期抵消了来自热带雨林的碳排放量约26% (21-34%).
- 波尔尼奥的再生率在恢复的前20年内明显高于中非和亚马逊地区 (45%-58%),受当地环境变量的影响.
结论:
- 恢复热带森林是一个重要的碳汇,在缓解气候变化方面发挥着至关重要的作用.
- 保护完整的古老森林仍然是首要任务,但保护和恢复退化森林也至关重要.
- 保护恢复退化和二级森林在研究的热带地区具有可行的未来碳汇潜力为53 Tg C年−1 (44-62 Tg C年−1).
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