京津风沙源区NPP时空变化及其对治理工程实施的响应  

Spatio-temporal variation of Net Primary Productivity in the Beijing-Tianjin sandstorm source area and its response to the implementation of control projects

作　　者：赵恒谦[1,2] 刘轩绮 刘哿 付含聪 张宇娇 杜守航 蒋金豹 郭伟[1] 杨姿涵 ZHAO Hengqian;LIU Xuanqi;LIU Ge;FU Hancong;ZHANG Yujiao;DU Shouhang;JIANG Jinbao;GUO Wei;YANG Zihan(College of Geoscience and Surveying Engineering,China University of Mining and Technology(Beijing),Beijing 100083,China;Marine Ecological Restoration and Smart Ocean Engineering Research Center of Hebei Province,Qinhuangdao 066000,China)

机构地区：[1]中国矿业大学(北京)地球科学与测绘工程学院,北京100083 [2]河北省海洋岸线生态修复与智慧海洋监测工程研究中心,秦皇岛066000

出　　处：《生态学报》2024年第6期2406-2419,共14页Acta Ecologica Sinica

基　　金：国家自然科学基金(41930650);中央高校基本科研业务费专项资金(2022JCCXDC01);河北省海洋岸线生态修复与智慧海洋监测工程研究中心开放基金课题(HBMESO2305)。

摘　　要：利用遥感大数据对生态治理工程区域的净初级生产力和固碳能力进行长期动态监测可以实现对治理工程的实施效果的评价,同时为区域“碳中和”目标的实现及可持续发展提供有力支撑。利用Google Earth Engine(GEE)云计算平台,基于改进的CASA模型对京津风沙源治理工程区域的NPP进行计算。运用Sen斜率分析和MK趋势分析方法对2001—2020年间的NPP进行时空变化分析,并分析NPP对京津风沙源治理工程实施的响应。结果表明:1)在京津风沙源工程治理期间,京津风沙源区NPP总体呈波动上升趋势,平均增速为2.21 gC m^(-2)a^(-1),其中极显著增加区域占38.03%,说明京津风沙源治理工程对我国“碳中和”任务起到了积极作用,增加了区域的固碳能力;2)空间尺度上,京津风沙源区NPP和固碳量空间异质性较大,空间分布上主要呈现东部高,西部低的特点,其中,暖温带落叶阔叶林区域最高,温带荒漠区域最低;3)治理工程的实施所带来的NPP增长的速度在不同的区域并不一致,2001—2020年的NPP增速京津冀地区(4.74 gC m^(-2)a^(-1))>山西地区(4.52 gC m^(-2)a^(-1))>陕西地区(3.53 gC m^(-2)a^(-1))>内蒙古地区(1.55 gC m^(-2)a^(-1));4)生态工程实施所带来的生态环境的改善总体呈现先慢后快的特点,绝大部分区域后十年间的变化速率都显著大于前十年,而在生态环境较为恶劣、荒漠区域广布的内蒙古地区,生态环境的改善则具有一定的滞后性,2001—2010年NPP增速仅为0.04 gC m^(-2)a^(-1),直到2011年,NPP才开始有较为明显的增长,2011—2020年NPP增速为1.67 gC m^(-2)a^(-1)。风沙源治理工程需要长期坚持,才能取得更明显的成效。Long-term dynamic monitoring of the Net Primary Productivity(NPP)and carbon sequestration capacity of the ecological management project area using remote sensing data can evaluate the implementation effect of the management project and provide strong support for the realization of the carbon neutrality goal and sustainable development of the area.In this paper,we used Google Earth Engine(GEE)platform to calculate the NPP of the Beijing-Tianjin sandstorm-control project area based on the improved CASA model.The spatial and temporal changes of NPP during 2001—2020 were analyzed using Sen slope analysis and MK trend analysis,and the response of NPP to the implementation of the BeijingTianjin sandstorm-control project was analyzed.The results showed that:1)during the period of the Beijing-Tianjin sandstorm-control project,the NPP in the Beijing-Tianjin sandstorm source area presented an overall fluctuating upward trend with an average growth rate of 2.21 gC m^(-2)a^(-1),among which 38.03%was highly significant increase,indicating that the Beijing-Tianjin sandstorm-control project has played a positive role in China's carbon neutral task and increased the carbon sequestration capacity of the area;2)On the spatial scale,the NPP and carbon sequestration in the Beijing-Tianjin sandstorm source area were spatially heterogeneous,and the spatial distribution was mainly characterized by high in the east and low in the west,among which the warm temperate deciduous broad-leaved forest region was the highest,and the temperate desert region was the lowest;3)The rate of NPP growth brought by the implementation of the control project was not consistent in different regions,and the rate of NPP growth from 2001 to 2020 in Beijing-Tianjin-Hebei region(4.74 gC m^(-2)a^(-1))>Shanxi region(4.52 gC m^(-2)a^(-1))>Shaanxi region(3.53 gC m^(-2)a^(-1))>Inner Mongolia region(1.55 gC m^(-2)a^(-1));4)The improvement of the ecological environment brought about by the implementation of ecological projects was generally characterized by slow and

关 键 词：京津风沙源治理工程 Google Earth Engine云平台 CASA模型 植被净初级生产力 固碳能力 时空变化 

分 类 号：Q948[生物学—植物学]