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城乡梯度下福建省植被碳汇对植被覆盖变化的响应
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Abstract:
在城市化浪潮中如何增强城市植被的碳汇能力已经成为实现城市可持续发展和应对气候变化的关键问题。植树造林和增加绿地面积能有效提升碳汇。因此，深入研究植被碳汇对植被覆盖变化响应，对于增加植被碳汇是必要的。本文基于遥感数据，系统评估了2000~2020年间福建省植被对植被碳汇增加的时空分异特征，并采用非线性拟合模型量化植被覆盖与碳汇变化之间的复杂关系。结果表明研究期内植被的增汇效应不断提升。植被的增汇效应存在城乡差异性，城市的增汇效应低于农村地区。植被对碳汇的变化呈现非线性的关系，存在拐点效应。研究结果可为福建省乃至其他地区制定差异性的植被碳汇管理、城市规划和生态环境保护提供科学依据。未来需要开展更多关于城乡植被碳汇的研究，为植被管理策略提供更为精准的建议。
In the wave of urbanization, how to enhance the carbon sequestration capacity of urban vegetation has become a key issue in achieving sustainable urban development and coping with climate change. Afforestation and increasing the area of green space can effectively improve carbon sinks. Therefore, it is necessary to study the response of vegetation carbon sink to vegetation cover change in depth to increase vegetation carbon sequestration. Based on remote sensing data, this paper systematically evaluated the spatiotemporal differentiation characteristics of vegetation to vegetation carbon sink increase in Fujian Province from 2000 to 2020, and used a nonlinear fitting model to quantify the complex relationship between vegetation cover and carbon sink change. The results showed that the sink enhancement effect of vegetation continued to increase during the study period. There are differences between urban and rural areas in the effect of vegetation enhancement, and the effect of vegetation enhancement is lower than that in rural areas. There is a nonlinear relationship between vegetation and carbon sink changes, and there is an inflection point effect. The results of this study can provide a scientific basis for the formulation of differentiated vegetation carbon sink management, urban planning and ecological environmental protection in Fujian Province and even other regions. In the future, more research on urban and rural vegetation carbon sequestration is needed to provide more accurate suggestions for vegetation management strategies.
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