[Evaluation of Land Ecological Status and Diagnosis of Obstacle Factors in Jiangsu, China].

Q2 Environmental Science Huanjing Kexue/Environmental Science Pub Date : 2024-10-08 DOI:10.13227/j.hjkx.202311246
Qing-Ke Yang, Lei Wang, Li-Gang Lü, Ying Li, Ye-Ting Fan, Gao-Li Zhu, Ya-Zhu Wang
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Abstract

By constructing a land ecological evaluation index system at the village scale and using models such as spatial correlation analysis, hotspot analysis, and obstacle factor diagnosis, the basic characteristics, spatial differentiation, and obstacle factors of land ecological status in Jiangsu Province were studied. This study sought to clarify the foundation, structure, function, and benefit characteristics of land ecosystems and optimize land management and policy regulation. The results showed that: ① The spatial distribution of land ecological status in Jiangsu Province was high in the north and low in the south, with multiple high-value areas radiating outward and decreasing, with low value centers radiating outward and increasing. The distribution area of the highest and lower values was relatively small, whereas the area of the middle value area was the largest. The higher values were mainly distributed in the suburbs and edge areas of each county. ② The spatial autocorrelation of land ecological status in Jiangsu Province was significant, with hot spots mainly concentrated in northern Jiangsu and cold spots concentrated in southern Jiangsu, as well as some areas of Taizhou and Nantong. The spatial distribution of cold and hot spots showed a complementary pattern with the level of regional development. The comprehensive index value of land ecology in developed areas was lower, whereas the index value in underdeveloped areas was higher. ③ The natural background conditions of Class Ⅰ land ecological zone in Jiangsu Province were superior, with good ecological construction and benefits and a high level of ecological status. The obstacle factors mainly included the proportion of water bodies and the average annual degradation rate of forest land. The Class Ⅱ land ecological zone was mostly located in the Huainan region and mainly composed of plain landforms. The Class Ⅲ land ecological zone had the largest area, located in the riverside areas of southern Jiangsu. The obstacle factors mainly included the average annual degradation rate of arable land and the proportion of soil pollution area. By controlling land ecological risks, the early warning level of ecological crisis could be improved.

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[中国江苏土地生态状况评价与障碍因素诊断]。
通过构建村庄尺度的土地生态评价指标体系,运用空间关联分析、热点分析、障碍因子诊断等模型,研究了江苏省土地生态状况的基本特征、空间分异和障碍因子。该研究旨在厘清土地生态系统的基础、结构、功能和效益特征,优化土地管理和政策调控。结果表明:①江苏省土地生态地位空间分布北高南低,多个高值区向外辐射递减,低值中心向外辐射递增。高值区和低值区分布面积相对较小,而中值区面积最大。高值区主要分布在各县的郊区和边缘地区。江苏省土地生态状况的空间自相关性显著,热点主要集中在苏北,冷点主要集中在苏南,泰州和南通的部分地区也有分布。冷、热点区域的空间分布与区域发展水平呈互补格局。发达地区的土地生态综合指数值较低,而欠发达地区的指数值较高。江苏省陆地生态Ⅰ类区自然本底条件优越,生态建设和生态效益较好,生态地位较高。障碍因素主要包括水体比例和林地年均退化率。Ⅱ类陆地生态区主要分布在淮南地区,以平原地貌为主。Ⅲ类地生态区面积最大,位于苏南沿江地区。障碍因素主要包括耕地年均退化率和土壤污染面积比例。通过控制土地生态风险,可以提高生态危机的预警水平。
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来源期刊
Huanjing Kexue/Environmental Science
Huanjing Kexue/Environmental Science Environmental Science-Environmental Science (all)
CiteScore
4.40
自引率
0.00%
发文量
15329
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