标题: Exploring the spatio-temporal impacts of farmland reforestation on ecological connectivity using circuit theory: A case study in the agro-pastoral ecotone of North China
作者: Liu, XJ (Liu, Xiaojing); Liu, DF (Liu, Dianfeng); Zhao, HZ (Zhao, Hongzhuo); He, JH (He, Jianhua); Liu, YL (Liu, Yaolin)
来源出版物: JOURNAL OF GEOGRAPHICAL SCIENCES 卷: 30 期: 9 页: 1419-1435 DOI: 10.1007/s11442-020-1790-z 出版年: SEP 2020
摘要: Farmland reforestation can contribute substantially to ecological restoration. Previous studies have extensively examined the ecological effects of farmland reforestation, but few of them have investigated the spatiotemporal responses of broad-scale landscape connectivity to reforestation. By using a typical agro-pastoral ecotone in northern China as a case study, we addressed this issue based on an innovative integration of circuit theory approach and counterfactual analysis. The forest connectivity through multiple dispersal pathways was measured using the circuit theory approach, and its spatiotemporal changes after reforestation were evaluated by counterfactual analysis. The results showed that from 2000-2015, the reforested farmland occupied 2095 km(2), and 12.5% was on steeply sloped land. Farmland reforestation caused a greater increase in ecological connectivity by adding new ecological corridors and stepping stones in scattered forest areas rather than in areas with dense forest distributions. The newly added corridors and stepping stones were fragmented, short and narrow and thus deserve powerful protection. Future reforestation to improve landscape connectivity should highlight pinch point protection and obstacle removal as well as the tradeoff between farmland loss and farmer survival. Our findings are expected to inform the optimization of the Grain for Green policy from the perspective of broad-scale biodiversity conservation.
作者关键词: farmland reforestation; ecological connectivity; circuit theory; land use change; agro-pastoral ecotone; China
地址: [Liu, Xiaojing; Liu, Dianfeng; Zhao, Hongzhuo; He, Jianhua; Liu, Yaolin] Wuhan Univ, Sch Resource & Environm Sci, Wuhan 430079, Peoples R China.
[Liu, Dianfeng; He, Jianhua; Liu, Yaolin] Wuhan Univ, Minist Nat Resources, Key Lab Digital Cartog & Land Informat Engn, Wuhan 430079, Peoples R China.
[Liu, Yaolin] Wuhan Univ, Collaborat Innovat Ctr Geospatial Informat Sci, Wuhan 430079, Peoples R China.
通讯作者地址: Liu, DF (corresponding author)，Wuhan Univ, Sch Resource & Environm Sci, Wuhan 430079, Peoples R China.
Liu, DF (corresponding author)，Wuhan Univ, Minist Nat Resources, Key Lab Digital Cartog & Land Informat Engn, Wuhan 430079, Peoples R China.
电子邮件地址: Lxiaojing@whu.edu.cn; firstname.lastname@example.org.
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