Wolka Kebede, Biazin Birhanu, Getachew Fikadu, Girma Firehiywot, Desta Gizaw
Wondo Genet College of Forestry and Natural Resource, Hawassa University, P.O.box 128, Shashemene, Ethiopia.
International Potato Center, P.O. Box TL 1785, Tamale, Ghana.
J Environ Manage. 2023 Jun 1;335:117499. doi: 10.1016/j.jenvman.2023.117499. Epub 2023 Feb 26.
Land degradation is one of the contemporary environmental challenges affecting regions inhabited by over one-third of the global population. In response to land degradation, restoration of degraded landscapes through area closure has been implemented through government and bilateral organizations for the last three decades in Ethiopia. Objectives of this study were to: i) explore the effects of landscape restoration on vegetation cover; ii) identify the perceived benefits to local communities; and 3) synthesize the lessons learnt on communities' willingness to sustain the restored landscapes. The study was conducted in project-supported restoration areas including the Dimitu and Kelisa watersheds representing the central rift valley dry lands and the Gola Gagura watershed representing the eastern dry land areas around Dire Dawa. The temporal changes in land use and land cover due to area closure integrated with physical and biological soil and water conservation measures were detected using GIS/Remote sensing techniques. Moreover, eighty-eight rural households were interviewed. The results of the study revealed that landscape restoration activities such as area closure integrated with physical soil and water conservation, and planting of trees and shrubs contributed to the significant changes in land covers of the watersheds in 3-5 years. Hence, barren lands were reduced by 35-100% while there were significant increases in forest lands (15%), woody grasslands (247-785%), and bushlands (78-140%). More than 90% of the respondents in the Dimitu and Gola Gagura watersheds verified that the landscape restoration activities improved vegetation cover and ecosystem services, reduced erosion, and increased incomes. A great majority of farm households (63-100%) expressed their willingness to contribute to different forms of landscape restoration interventions. Encroachment of livestock to closed area, shortage of finance, and the growing number of wild animals in closed area were the perceived challenges. Proper planning and implementation of integrated interventions, creating local watershed user associations, ensuring appropriate benefit-sharing and implementing innovative pathways to reconcile the tradeoffs could be considered to scale up interventions and address potential conflicts of interest.
土地退化是影响全球三分之一以上人口居住地区的当代环境挑战之一。为应对土地退化,过去三十年来,埃塞俄比亚政府和双边组织通过封闭区域实施了退化景观恢复项目。本研究的目的是:i)探讨景观恢复对植被覆盖的影响;ii)确定当地社区感知到的益处;以及iii)总结关于社区维持恢复景观意愿的经验教训。该研究在项目支持的恢复区域开展,包括代表中部裂谷干旱地区的迪米图和凯利萨流域,以及代表德雷达瓦周边东部干旱地区的戈拉加古拉流域。利用地理信息系统/遥感技术检测了因封闭区域并结合物理和生物水土保持措施而导致的土地利用和土地覆盖的时间变化。此外,还对88户农村家庭进行了访谈。研究结果表明,诸如封闭区域并结合物理水土保持措施以及种植树木和灌木等景观恢复活动,在3至5年内促使流域土地覆盖发生了显著变化。因此,荒地减少了35%至100%,而林地(增加了15%)、木质草原(增加了247%至785%)和灌木丛(增加了78%至140%)均有显著增加。迪米图和戈拉加古拉流域超过90%的受访者证实,景观恢复活动改善了植被覆盖和生态系统服务,减少了侵蚀,并增加了收入。绝大多数农户(63%至100%)表示愿意为不同形式的景观恢复干预措施做出贡献。牲畜进入封闭区域、资金短缺以及封闭区域内野生动物数量增加被视为面临的挑战。可以考虑进行综合干预措施的合理规划与实施、建立地方流域用户协会、确保适当的利益分享以及实施创新途径来协调权衡取舍,以扩大干预规模并解决潜在的利益冲突。