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Soil carbon stocks in Ethiopian forests and estimations of their future development under different forest use scenarios
Land Degradation & Development ( IF 4.7 ) Pub Date : 2020-05-08 , DOI: 10.1002/ldr.3647
Aleksi Lehtonen 1 , Boris Ťupek 1 , Tiina M. Nieminen 2 , András Balázs 1 , Agena Anjulo 3 , Mindaye Teshome 3 , Yibeltal Tiruneh 4 , Jukka Alm 5
Affiliation  

Contributions from all land‐uses are needed if Ethiopia is to fulfil its Paris Agreement targets. The magnitude of soil carbon stock and the role of Ethiopian forest soils in climate change mitigation has not yet been clarified. In this study, soil carbon inventory in forests was carried out as a part of the Ethiopia REDD+ Programme. The performance of soil carbon models Yasso07 and CENTURY was tested by comparing the model predictions with the empirical soil organic carbon (SOC) data provided by the field inventory. In addition to that, Global Soil Organic Carbon (GSOC) map estimates by the Food and Agriculture Organization for Ethiopia were included in the comparison. The soil inventory was carried out in 2017–2018 at a subset of permanent sampling units of the National Forest Inventory conducted in 2014–2017. A combination of soil inventory data, soil carbon models and satellite images enabled to quantify the impact of forest use intensity to future SOC sinks in Ethiopian forests in a novel way. The Yasso07 and CENTURY models provided similar SOC estimates to the measured data for all biomes, and the GSOC map overestimated in biomes with larger SOC stocks. Results showed that Moist Afromontane forest biome contains twice as much SOC per unit area compared to Combretum‐Terminalia forest biome and three‐times more SOC compared to Acacia‐Commiphora. Results underlined that sustainable forest management has a high potential for soil carbon development in Ethiopian forests in near future, impacting the ability of the Country to achieve its Paris Agreement targets.

中文翻译:

埃塞俄比亚森林中的土壤碳储量及其在不同森林利用情景下的未来发展估算

如果埃塞俄比亚要实现其《巴黎协定》的目标,则需要所有土地用途的捐助。土壤碳储量的大小以及埃塞俄比亚森林土壤在缓解气候变化中的作用尚未阐明。在这项研究中,森林土壤碳清单是埃塞俄比亚REDD +计划的一部分。通过将模型预测值与实地清单提供的经验性土壤有机碳(SOC)数据进行比较,测试了土壤碳模型Yasso07和CENTURY的性能。除此之外,埃塞俄比亚粮食和农业组织的全球土壤有机碳(GSOC)地图估算值也包括在比较中。土壤清查工作是在2017-2018年期间对2014-2017年进行的国家森林清查工作的一部分永久性抽样单位进行的。通过结合土壤清单数据,土壤碳模型和卫星图像,可以以新颖的方式量化森林使用强度对埃塞俄比亚森林未来SOC库的影响。Yasso07和CENTURY模型为所有生物群落的实测数据提供了相似的SOC估计值,而具有较大SOC种群的生物群落中的GSOC图被高估了。结果表明,潮湿的Afromontane森林生物群落每单位面积的SOC比Combretum-Terminalia森林生物群落的两倍,而SOC则比Acacia-Commiphora高三倍。结果表明,可持续森林管理在不久的将来具有发展埃塞俄比亚森林土壤碳的巨大潜力,影响该国实现其《巴黎协定》目标的能力。土壤碳模型和卫星图像能够以新颖的方式量化森林使用强度对埃塞俄比亚森林未来SOC汇的影响。Yasso07和CENTURY模型为所有生物群落的实测数据提供了相似的SOC估计值,而具有较大SOC种群的生物群落中的GSOC图被高估了。结果表明,潮湿的Afromontane森林生物群落每单位面积的SOC比Combretum-Terminalia森林生物群落的两倍,而SOC则比Acacia-Commiphora高三倍。结果强调,可持续森林管理在不久的将来具有发展埃塞俄比亚森林土壤碳的巨大潜力,影响该国实现其《巴黎协定》目标的能力。土壤碳模型和卫星图像能够以新颖的方式量化森林使用强度对埃塞俄比亚森林未来SOC汇的影响。Yasso07和CENTURY模型为所有生物群落的实测数据提供了相似的SOC估计值,而具有较大SOC种群的生物群落中的GSOC图被高估了。结果表明,潮湿的Afromontane森林生物群落每单位面积的SOC比Combretum-Terminalia森林生物群落的两倍,而SOC则比Acacia-Commiphora高三倍。结果强调,可持续森林管理在不久的将来具有发展埃塞俄比亚森林土壤碳的巨大潜力,影响该国实现其《巴黎协定》目标的能力。Yasso07和CENTURY模型为所有生物群落的实测数据提供了相似的SOC估计值,而具有较大SOC种群的生物群落中的GSOC图被高估了。结果表明,潮湿的Afromontane森林生物群落每单位面积的SOC比Combretum-Terminalia森林生物群落的两倍,而SOC则比Acacia-Commiphora高出三倍。结果表明,可持续森林管理在不久的将来具有发展埃塞俄比亚森林土壤碳的巨大潜力,影响该国实现其《巴黎协定》目标的能力。Yasso07和CENTURY模型为所有生物群落的实测数据提供了相似的SOC估计值,而具有较大SOC种群的生物群落中的GSOC图被高估了。结果表明,潮湿的Afromontane森林生物群落每单位面积的SOC比Combretum-Terminalia森林生物群落的两倍,而SOC则比Acacia-Commiphora高三倍。结果表明,可持续森林管理在不久的将来具有发展埃塞俄比亚森林土壤碳的巨大潜力,影响该国实现其《巴黎协定》目标的能力。
更新日期:2020-05-08
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