TY - Journal of Resources and Ecology A1 - CAO Yuhong, CAO Yuandan, CHEN Zhiyu, YU Dailiang T1 - Ecosystem Service Value Evolution and Security Pattern Optimization in Huaihai Economic Zone Y1 - 2022-10-12 00:00:00.0 JF - Journal of Resources and Ecology JO - Journal of Resources and Ecology SP - 977 EP - 985 VL - 13 IS - 6 UR - {https://www.jorae.cn/EN/10.5814/j.issn.1674-764x.2022.06.003} N1 - 10.5814/j.issn.1674-764x.2022.06.003 ER -