论文标题
树种对表土碳储量和浓度的影响是由树种类型，菌根结合和N固定能力介导的
Tree species effects on topsoil carbon stock and concentration are mediated by tree species type, mycorrhizal association, and N-fixing ability at the global scale
论文作者
论文摘要
选择合适的树种是一个重要的森林管理决策，可能会影响土壤中碳（C）的隔离。但是，有关树种对全球尺度上土壤C种群影响的信息尚不清楚。在这里，我们定量合成了850种观察结果，这些观察结果是在普通的花园或单一养殖种植园中进行的，以评估树种类型（Broadeaf vs. Conifer），菌根菌根协会（Ambuscular mycorrhizal（am）（AM）（AM）与外生疗法（ECTOMYCORMONCORHIZAL（ECM），以及N-FINT-N-FIND-N-FISSING VS. VS. VS. VS.表土（中位深度为10 cm）C浓度和库存，以及这种影响如何受环境因素（例如地理位置和气候）的影响。 We found that (1) tree species type, mycorrhizal association, and N-fixing ability were all important factors affecting soil C, with lower forest floor C stocks under broadleaved (44%), AM (39%), or N-fixing (28%) trees respectively, but higher mineral soil C concentration (11%, 22%, and 156%) and stock (9%, 10%, and 6%) under broadleaved, AM, and N-fixing trees 分别; （2）树种类型，菌根结合和N固定能力影响森林地板C种群和矿物质土壤C浓度以及直接或间接地或间接影响土壤特性，例如微生物生物量C和氮； （3）树种对矿物土壤C浓度和库存的影响是由纬度，垫子，地图和森林林的年龄介导的。这些结果揭示了树种及其特定特征如何影响森林地板C种群和矿物质土壤C浓度和全球范围。对我们研究中发现的树种效应的潜在机制的见解对于在森林管理中的选择或旨在隔离土壤中更多大气中的树种物种的选择非常有用，以减轻气候变化。
Selection of appropriate tree species is an important forest management decision that may affect sequestration of carbon (C) in soil. However, information about tree species effects on soil C stocks at the global scale remains unclear. Here, we quantitatively synthesized 850 observations from field studies that were conducted in a common garden or monoculture plantations to assess how tree species type (broadleaf vs. conifer), mycorrhizal association (arbuscular mycorrhizal (AM) vs. ectomycorrhizal (ECM)), and N-fixing ability (N-fixing vs. non-N-fixing), directly and indirectly, affect topsoil (with a median depth of 10 cm) C concentration and stock, and how such effects were influenced by environmental factors such as geographical location and climate. We found that (1) tree species type, mycorrhizal association, and N-fixing ability were all important factors affecting soil C, with lower forest floor C stocks under broadleaved (44%), AM (39%), or N-fixing (28%) trees respectively, but higher mineral soil C concentration (11%, 22%, and 156%) and stock (9%, 10%, and 6%) under broadleaved, AM, and N-fixing trees respectively; (2) tree species type, mycorrhizal association, and N-fixing ability affected forest floor C stock and mineral soil C concentration and stock directly or indirectly through impacting soil properties such as microbial biomass C and nitrogen; (3) tree species effects on mineral soil C concentration and stock were mediated by latitude, MAT, MAP, and forest stand age. These results reveal how tree species and their specific traits influence forest floor C stock and mineral soil C concentration and stock at a global scale. Insights into the underlying mechanisms of tree species effects found in our study would be useful to inform tree species selection in forest management or afforestation aiming to sequester more atmospheric C in soil for mitigation of climate change.
