土地是由土壤、岩石、水文、气候、植被等组成的自然综合体，承载着人类生产、生活的社会功能和生态服务功能。掌握准确的土地覆盖信息是揭示土地功能变化的重要前提。因此，研究土地覆盖时空变化规律，揭示土地覆盖变化的生态环境效益，可为土地利用开发与生态保护高质量协调发展提供科学参考。
我国地理环境复杂，加之影响地表覆盖数据生产精度的因素众多，因而大范围的地表覆盖数据生产难度很大。目前，各种地表覆盖数据产品存在分类体系不一致，数据一致性不高的等问题。针对以上问题，我院蔡利平研究组系统开展了地表覆盖变化及其与生态环境效应方面的研究，并取得了系列研究成果。
课题组对MCD12Q1、CCI-LC、Globeland30和CNLUCC等地表覆盖数据产品进行一致性分析，采用自适应方式集成不同数据的质量优势，合成了实用性更强的地表覆盖分类数据，进一步提取了各种地类的时空变化特征。在此基础上，提取了土地退化或土地开发引起的土地覆被变化信息，重点分析了生态脆弱性较强的青藏高原草地退化状况，为青藏高原生态保护提供了科学依据。
为了掌握土地利用变化与生态环境效益之间的关系，课题组通过地理探测器分析了我国土地覆盖变化引起的多种生态环境效应（温度、固碳和绿度）变化的时空差异性；采用多方法组合方式研究了典型地区的气候因素和社会因素对水分利用效率的贡献率，发现不同地区在不同尺度下水分利用效率对两种因素响应的差异显著，为更好地理解生态系统对自然和社会因素的响应提供了依据。
上述系列研究成果以蔡利平博士或者其课题组研究生为首位作者公开发表在《Land Use Policy》、《Land Degradation & Development》等SSCI和SCI一区、二区TOP等期刊上。相关论文列表如下：
[1] Cai Liping, Wang Hui, Liu Yanxu, Fan Donglin, Li Xiaoxiao. Is potential cultivated land expanding or shrinking in the dryland of China? Spatiotemporal evaluation based on remote sensing and SVM[J]. Land Use Policy, 2022. (SSCI一区TOP)
[2] Cai Liping, Wang Shanshan, Lizhi Jia, Yijia Wang, Hui Wang, Donglin Fan, Lin Zhao. Consistency Assessments of the Land Cover Products on the Tibetan Plateau[J]. IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2022.（SCI三区）
[3] Cai Liping, Fan Donglin, Wen Xiaojin, Wang Hui, Badarifu, Wang Shanshan. Spatiotemporal tendency of agricultural water use efficiency in the northernmost Yellow River: Indicator comparison and interactive driving factors[J]. Journal of Arid Environment. 2022.（SCI四区）
[4] Wang Hui, Liu Yanxu, Cai Liping, Fan Donglin, Wang Yijia, Yao Ying. Regional differentiation in the ecological effects of land cover change in China[J]. Land Degradation & Development, 2022. (SCI一区TOP)
[5] Fan Donglin, Liu Yanxu, Yao Ying, Cai Liping, Wang Shanshan. Changes in the relationship between vapour pressure deficit and water use efficiency with the drought recovery time: A case study of the Yellow River Basin[J]. Journal of Environmental Management, 2022. (SCI二区TOP)
[6] Wang Shanshan, Lizhi Jia, Liping Cai, Yijia Wang, Tianyu Zhan, Anqi Huang, and Donglin Fan. Assessment of Grassland Degradation on the Tibetan Plateau Based on Multi-Source Data[J]. Remote Sensing, 2022. (SCI二区TOP)
[7] Wang Hui, Cai Liping, Wen Xiaojin, Fan Donglin, Wang Yuejun. Land cover change and multiple remotely sensed datasets consistency in China[J]. Ecosystem Health and Sustainability, 2022. (SCI二区)
[8] Fan Donglin, Wen Xiaojin, Cai Liping, Wang Hui, Wang Shanshan, Badarifu, Gao Zhiyu. Contributions of climatic and social factors to two water use efficiency indicators in the Yellow River[J]. Hydrological Processes, 2022. (SCI二区)
[9] Wang Hui, Wen Xiaojin, Wang Yijia, Cai Liping, Peng Da, Liu Yanxu. China’s land cover fraction change during 2001–2015 based on remote sensed data fusion between MCD12 and CCI-LC[J]. Remote Sensing, 2021. (SCI二区TOP)
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