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首页> 外文期刊>Forest Science >Annual Greenhouse-Gas Emissions from Forest Soil of a Peri-Urban Conifer Forest in Greece under Different Thinning Intensities and Their Climate-Change Mitigation Potential
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Annual Greenhouse-Gas Emissions from Forest Soil of a Peri-Urban Conifer Forest in Greece under Different Thinning Intensities and Their Climate-Change Mitigation Potential

机译：不同稀疏强度下希腊围城针叶林森林土壤的年温室气体排放及其气候变化缓解潜力

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摘要

Knowledge of the response of thinning implementation on forest soil-atmospheric greenhouse gas (GHG) (CO2, CH4, N2O) fluxes exchange system in Mediterranean region is limited because of the high heterogeneity of both soil properties and forest biomass. The novelty of this study is grounded predominantly in evaluating for the first time the response of annual GHG fluxes to thinning in a coniferous peri-urban forest soil in Greece, thus contributing significantly to the enrichment of the GHG fluxes database from the Mediterranean forest ecosystem. Results suggest that CH4 uptake increased with increasing thinning intensity. The reduction in CO2 emissions in both thinning treatments was possibly related to an indirect effect of soil heterotrophic and autotrophic respiration. Coniferous peri-urban forests in Greece can act temporally as sinks of atmospheric N2O in the coldest months and a weak source of N2O fluxes in summer. The GHG variation depended largely on soil environmental factors with soil temperature representing the dominant factor for CO(2 )and CH4, whereas soil moisture correlated, albeit weakly, with N2O variability. Reduction in global warming potential was observed in both thinning treatments, markedly in selective treatment, giving an initial indication that high-intensity thinning in coniferous peri-urban forests in Greece presents a high potential for global change mitigation.
机译：由于土壤性质和森林生物质的高异质性，地中海地区的森林土壤大气温室气体（GHG）（CO2，CH4，N2O）助势交换系统的呼应的知识是有限的。这项研究的新颖性主要是在评估每年的GHG通量在希腊的针叶围城森林土壤中稀释时的第一次评估，从而显着促进了来自地中海森林生态系统的GHG助势数据库的富集。结果表明，随着稀疏强度的增加，CH4摄取增加。稀释治疗中的二氧化碳排放量可能与土壤异养和自养呼吸的间接效应有关。希腊的针叶鸟城森林在夏季最冷的几个月和最寒冷的月份的大气N2O下沉，夏季的弱来源。 GHG变化很大程度上取决于土壤环境因素，土壤温度代表CO（2）和CH4的主要因素，而土壤湿度相关，尽管弱，具有N2O变异性。在稀疏治疗中观察到全球变暖潜力的降低，显着在选择性处理中，初步指示希腊针叶围城森林的高强度稀疏呈现出高潜力的全球变化缓解。

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