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Prosopis juliflora management and grassland restoration in Baringo County, Kenya: Opportunities for soil carbon sequestration and local livelihoods
Journal of Applied Ecology ( IF 5.0 ) Pub Date : 2021-03-28 , DOI: 10.1111/1365-2664.13854 René Eschen 1 , Ketema Bekele 2 , Purity Rima Mbaabu 3, 4, 5 , Charles Joseph Kilawe 6 , Sandra Eckert 7
中文翻译：
肯尼亚巴林戈县的胡杨管理和草地恢复：土壤碳固存和当地生计的机会
更新日期：2021-06-02
Journal of Applied Ecology ( IF 5.0 ) Pub Date : 2021-03-28 , DOI: 10.1111/1365-2664.13854 René Eschen 1 , Ketema Bekele 2 , Purity Rima Mbaabu 3, 4, 5 , Charles Joseph Kilawe 6 , Sandra Eckert 7
Affiliation
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- Climate change, land degradation and invasive alien species (IAS) threaten grassland ecosystems worldwide. IAS clearing and grassland restoration would help to reduce the negative effects of IAS, restore the original vegetation cover and sustain livelihoods while contributing to climate change mitigation, but uncertain financial benefits to local stakeholders hamper such efforts. This study assessed where and when net financial benefit could be realized from Prosopis juliflora management and subsequent grassland restoration by combining ecological, social and financial information.
- Impacts of Prosopis invasion and grassland degradation on soil organic carbon (SOC) in nine sublocations in Baringo County, Kenya, were evaluated. Then the financial impacts of Prosopis removal and grassland restoration in the area were calculated and spatially explicit management scenarios for each sublocation modelled, combining geographical information derived from satellite images taken in different years of the invasion with SOC data and socio-economic data collected in the sublocations.
- The expanding Prosopis distribution and density since 1995 have increased cumulated SOC storage on former bare land or degraded grasslands. On former pristine or restored grasslands, however, Prosopis invasion has reduced total SOC storage.
- Prosopis removal and grassland restoration are predicted to yield financial benefits through charcoal made from removed trees, increased cattle numbers and carbon credits. However, a trade-off between increased SOC and net financial benefit was found. The predicted net SOC increase would contribute around one-tenth, at most, to the net financial benefit.
- The available budget, based on Baringo households’ average willingness to pay, would enable removal, on average, of one-fifth of Prosopis per sublocation in a single year. A larger area can be cleared if Prosopis is sparse than if it is dense. The analyses show that in some sublocations, households’ annual investments could result in restoration of all former grassland areas.
- Synthesis and applications. This study shows how integrating and linking detailed ecological, social and financial geodata to develop accurate and realistic invasive alien species management scenarios can illustrate costs and benefits of management interventions in a spatial context. Such scenarios should be used more extensively to support land management decisions.
中文翻译：
肯尼亚巴林戈县的胡杨管理和草地恢复：土壤碳固存和当地生计的机会
- 气候变化、土地退化和外来入侵物种 (IAS) 威胁着全世界的草原生态系统。IAS 清理和草地恢复将有助于减少 IAS 的负面影响，恢复原始植被覆盖和维持生计，同时有助于减缓气候变化，但当地利益相关者的不确定财务利益阻碍了这些努力。本研究结合生态、社会和财务信息，评估了在何时何地可以从胡杨管理和随后的草地恢复中实现净财务收益。
- 在肯尼亚巴林戈县的 9 个子地点评估了Prosopis入侵和草地退化对土壤有机碳 (SOC) 的影响。然后计算该地区Prosopis清除和草地恢复的财务影响，并对每个子位置的空间明确管理方案进行建模，将来自不同入侵年份的卫星图像的地理信息与在该地区收集的 SOC 数据和社会经济数据相结合。子位置。
- 自 1995 年以来不断扩大的Prosopis分布和密度增加了以前裸地或退化草地上的累积 SOC 储存量。然而，在以前原始或恢复的草原上，Prosopis入侵减少了总 SOC 储存量。
- 预计Prosopis移除和草地恢复将通过由移除的树木制成的木炭、增加的牛数量和碳信用来产生经济利益。然而，发现增加的 SOC 和净财务收益之间存在权衡。预计的净 SOC 增加最多对净财务收益的贡献约为十分之一。
- 根据 Baringo 家庭的平均支付意愿，可用预算将能够在一年内平均移除每个子位置五分之一的Prosopis。如果Prosopis稀疏而不是密集，则可以清除更大的区域。分析表明，在一些子区域，家庭每年的投资可能导致所有原草地恢复。
- 合成与应用。本研究展示了如何整合和链接详细的生态、社会和金融地理数据以开发准确和现实的外来入侵物种管理方案，可以说明空间环境中管理干预的成本和收益。应更广泛地使用此类情景来支持土地管理决策。
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