土地利用变化对生态系统碳汇功能影响的综合评价
1.国家环保总局气候变化影响研究中心,北京 100012
2.中国林业科学研究院森林环境与保护研究所,北京 100091
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摘要
在分析了六盘山林区典型生态系统碳循环规律的基础上,结合碳汇/源的概念,综合评价了土地利用 变化对生态系统碳汇功能的影响。分析得出陆地生态系统碳汇/源功能体现在碳库的贮量、稳定性和碳库的输入 与输出强度方面;天然次生林和人工林生态系统的碳贮量汇功能较强,农田和草地较弱;土壤有机碳过程源/汇 方面,天然次生林生态系统是强汇,人工林生态系统是弱汇,草地和农田生态系统是源。提出增加生态系统碳 汇功能的措施包括增加生态系统碳输入、减少输出和增强碳库的稳定性。
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