评估土地利用变化和碳储存:中国吉林河流域的案例研究
Shuai Yang1, Liqin Li2, Renhuan Zhu3,4
1Publicity and United Front Work Department, Nanchong Vocational College of Culture and Tourism, Nanchong, 637400, China.
Scientific reports
|July 10, 2024
概括
土地利用变化,特别是农田转化为建筑用地,大大减少了吉林河流域的碳储存. 保护耕地对于加强生态系统的碳封存和实现双碳目标至关重要.
科学领域:
- 地球生态系统的碳动力学.
- 土地利用变化的影响影响土地利用变化.
- 区域生态评估区域生态评估
背景情况:
- 土地利用变化是陆地生态系统碳储存波动的主要驱动因素.
- 关于土地利用变化对复杂生态系统中碳储存的影响的研究仍然有限.
- 吉林河流域 (JRB) 是一个独特的案例,因为它面积广,地形多样化,高度差异很大.
研究的目的:
- 从2000年到2020年分析土地利用变化及其对吉林河流域 (JRB) 碳储存的影响.
- 模拟2035年不同情景下的未来土地使用模式 (通常情况,耕地保护,生态优先).
- 评估各种土地利用政策在减轻碳储存损失和为未来土地利用规划提供信息方面的有效性.
主要方法:
- 对2000年至2020年期间的土地利用变化分析.
- 在BAU,CP和EP场景下使用PLUS模型模拟2035年的土地利用模式.
- 使用InVEST模型进行碳储存评估.
主要成果:
- 耕地是占主导地位的土地使用类型,正在经历净减少,大多数新建建筑用地源自耕地.
- 自2005年以来,JRB的总碳储存量已经减少,显示出空间异质性 (北方更高,南方更低).
- 农田转化为建筑用地是减少碳储存的主要驱动因素;农田保护场景与BAU和EP场景相比,碳损失较低.
结论:
- PLUS和InVEST模型是分析复杂生态系统动态和支持土地利用政策制定的有效工具.
- 实施严格的耕地补充政策对于增加JRB的碳捕获能力至关重要.
- 增加耕地面积对于确保区域粮食和生态安全至关重要,有助于实现中国的"双碳"目标.
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