在未来气候情景下,萨凡纳生态系统中不同植物功能类型中GPP的变化和反应
Weiduo Chen1, Xuehai Fei2, Jingyu Zhu1
1College of Resources and Environmental Engineering, Key Laboratory of Karst Georesources and Environment (Guizhou University), Ministry of Education, Guizhou University, Guiyang, 550025, Guizhou, China; Guizhou Karst Environmental Ecosystems Observation and Research Station, Ministry of Education, Guizhou University, Guiyang, 550025, Guizhou, China.
Journal of environmental management
|August 17, 2025
概括
未来的气候变化会影响大草原生态系统 (SE) 的碳循环. 这项研究模拟了江大草原生态系统 (YJSE) 中不同植物功能类型 (PFT) 的总初级生产率 (GPP),揭示了植被组成的变化.
科学领域:
- 生态生态学 生态生态学
- 气候科学 气候科学
- 生态系统建模 生态系统建模
背景情况:
- 草原生态系统 (SE) 的碳循环对气候变化很敏感.
- 植物功能类型 (PFT) 对原始生产率 (GPP) 的影响尚不清楚.
- 缺乏有效的方法来模拟PFT特定的GPP在SE中.
研究的目的:
- 调查未来气候情景对YJSE GPP及其PFT的影响.
- 开发和应用一种用于同时校准PFT参数的方法.
- 为萨凡纳生态系统对气候变化的反应提供见解.
主要方法:
- 利用了来自元江大草原生态系统 (YJSE) 的旋转共变 GPP 数据.
- 使用BIOME-BGCMuSo模型进行生态系统模拟.
- 同时校准了四个PFT的参数:落叶灌木,常青灌木,草和落叶宽叶森林.
主要成果:
- 预计YJSE GPP在SSP1-2.6下稳定,而在SSP2-4.5和SSP5-8.5.5下降雨量增加.
- 常绿的灌木表现出较低的气候敏感性比落叶类型;SSP2-4.5具有最显著的影响.
- 预计在SSP2-4.5和SSP5-8.5下,草的GPP贡献将增加,这表明潜在的森林退化.
结论:
- 该研究成功地分离并预测了YJSE中单个PFT的未来GPP趋势.
- 这些发现为各种气候场景下沙原光合作用反应提供了新的见解.
- 结果强调了植被组成的潜在变化,草增加,森林可能减少.
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