Ecological and environmental consequences of ecological projects in the Beijing-Tianjin sand source region
Ecological and environmental consequences of ecological projects in the Beijing-Tianjin sand source region
复制标题
京津沙源区生态工程的生态环境后果
DOI：
10.1016/j.ecolind.2020.106111
复制
发表时间：
2020
影响因子：
6.9
通讯作者：
Guodong Ding
中科院分区：
文献类型：
--
作者：
Yuanyuan Zhao;Wenfeng Chi;Wenhui Kuang;Yanfeng Bao;Guodong Ding
评价京津风沙源治理工程对土壤风蚀和生态系统服务功能的影响，对于掌握京津风沙源治理工程的利弊得失，识别更合理的评价方法，评价区域的可持续发展具有重要意义。利用实地调查、遥感数据、气象数据和模型，定量分析了2000-2015年京津风沙源区土地利用/覆被变化（LUCCs）、土壤风蚀模数（SWEM）和生态系统服务功能的时空格局。生态项目对风蚀和生态系统服务的影响随后通过利用土地利用变化引起的变化进行了评估（例如，退耕还林（草）。结果表明，在当地气候交换和人类活动（如生态工程）的共同作用下，SWEM呈下降趋势，而生态系统服务（包括碳储存、水分保持和空气质量调节）呈增长趋势。剔除气候因素的影响，2000-2015年，生态工程引起的LUCC共减少SWEM 377万t，其中约70%是由荒漠向稀疏草地过渡引起的。从这一转变，生态系统服务，包括水分保持和地上净初级生产力表现出普遍增加。巴彦淖尔、鄂尔多斯桑迪和浑善达克桑迪的荒漠草地亚区是生态工程减少风蚀和增强生态系统服务功能的热点区域。我们建议协调努力，科学管理退化的土地和当地人口的分布，以及在预期的更热和更干燥的未来实施各种措施。
Evaluation of influences of the Beijing–Tianjin Sand Source Control Project on soil wind erosion and ecosystem services is imperative for mastering the benefits and drawbacks of the program, as well as for distinguishing more reasonable estimations to evaluate regional sustainable development. Within the Beijing–Tianjin Sand Source Region, we quantified the spatiotemporal patterns of land use/cover changes (LUCCs), soil wind erosion modulus (SWEM), and essential ecosystem services throughout 2000–2015 by utilizing field investigations, remotely sensed data, meteorological data, and modeling. The influences of ecological projects on wind erosion and ecosystem services has been subsequently assessed by using those modifications brought on via the LUCCs (e.g., conversion from cropland to grassland/woodland) during the ecological construction. The results indicated that the SWEM showed a decline and ecosystem services which included carbon storage, water retention, and air quality regulation exhibited growth driven by using both local climate exchanges and human activities such as ecological projects. Excluding the effects of climate factors, the LUCCs stemming from ecological projects caused a total SWEM decrease of 3.77 million tons during 2000–2015, of which approximately 70% was prompted by the way of the transition from desert to sparse grassland. And from this transition, ecosystem services including both water retention and aboveground net primary productivity manifest a general increase. The sub-regions of desert grassland in Bayannur, Ordos Sandy Land, and Otindag Sandy Land were hot spots for wind erosion declines and ecosystem service enhancements induced by the ecological projects. We recommend that endeavors be coordinated toward the scientific management of the degraded lands and distribution of the local populace, as well as the implementation of diverse measures in the expected hotter and drier future.