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Prioritizing Agricultural Patches for Reforestation to Improve Connectivity of Habitat Conservation Areas: A Guide to Grain-to-Green Project

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  • Zhouqiao Ren

    (Institute of Digital Agriculture, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China)

  • Wanxin Zhan

    (School of Resource and Environmental Sciences, Wuhan University, Wuhan 430079, China)

  • Qiaobing Yue

    (School of Resource and Environmental Sciences, Wuhan University, Wuhan 430079, China)

  • Jianhua He

    (School of Resource and Environmental Sciences, Wuhan University, Wuhan 430079, China)

Abstract

Landscape connectivity can largely affect the level of biodiversity and it is a key concern in conservation planning. Considering that protected areas (PAs) may become functionally isolated “islands” under rapid land-use change, there is an urgent need to expand and connect protected areas to prevent further biodiversity loss and improve PAs effectiveness. The Grain-to-Green Project (GTGP) is the largest reforestation program worldwide with the aim of controlling water and soil loss; however, the opportunities for connectivity gains through GTGP have been widely ignored. Here we provided a three-stage hierarchical framework incorporating soil erosion analysis, cropland suitability analysis and network analysis to prioritize agricultural patches for reforestation under the scheme of GTGP. The potential reforestation patches were identified in the first two stages. Then, four different GTGP strategies were designed, and a set of network metrics were used to determine the best strategy and prioritize patches that significantly enhance PAs connectivity. A typical GTGP region, Wanzhou district (Southwest China), was taken as the study area. We found that: (1) the agricultural patches with high reforestation suitability cover an area of c . 40 km 2 (1% of the study area); and (2) the efficiency of GTGP strategies varies by species, species with intermediate and high mobility benefit more from a strategy that continuously adds reforestation patches close to PAs, while for species with low dispersal ability, the amount of patches added should also be taken into account to decide the appropriate strategy. We conclude that our framework can provide guidance to restore PAs connectivity with limited land resources in the context of GTGP.

Suggested Citation

  • Zhouqiao Ren & Wanxin Zhan & Qiaobing Yue & Jianhua He, 2020. "Prioritizing Agricultural Patches for Reforestation to Improve Connectivity of Habitat Conservation Areas: A Guide to Grain-to-Green Project," Sustainability, MDPI, vol. 12(21), pages 1-17, November.
    • Handle: RePEc:gam:jsusta:v:12:y:2020:i:21:p:9128-:d:439234
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    References listed on IDEAS

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    1. Wang, Xiuhong & Shen, Jianxiu & Zhang, Wei, 2014. "Emergy evaluation of agricultural sustainability of Northwest China before and after the grain-for-green policy," Energy Policy, Elsevier, vol. 67(C), pages 508-516.
    2. C. R. Margules & R. L. Pressey, 2000. "Systematic conservation planning," Nature, Nature, vol. 405(6783), pages 243-253, May.
    3. Zhou, Decheng & Zhao, Shuqing & Liu, Shuguang & Zhang, Liangxia, 2014. "Modeling the effects of the Sloping Land Conversion Program on terrestrial ecosystem carbon dynamics in the Loess Plateau: A case study with Ansai County, Shaanxi province, China," Ecological Modelling, Elsevier, vol. 288(C), pages 47-54.
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