Microbial and faunal decomposers regulate the flux of carbon and nitrogen belowground, thus controlling the storage/release of carbon and nitrogen in soil systems. Warming is anticipated to alter decomposer biomass, and accelerate organismal metabolism and soil carbon release. We parameterized six soil food webs using empirical data for 18 trophic nodes at two boreal peatland sites under three climate scenarios (control, +2 °C, +4 °C), and model carbon and nitrogen flux, loss and retention using an energetic ecostoichiometric food web model. Differences in microbial biomass between sites dictated flux under warming. The community biomass of the fungal-dominated site was more impacted by warming, but fluxes were more responsive to warming at the bacterial-dominated site. Decreased metabolic efficiency of the soil food web at both sites in response to warming led to greater per capita carbon losses, indicating the long-term carbon storage potential of both systems is diminished.

中文翻译：

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土壤食物网的重组降低了北方泥炭地的碳储存潜力

微生物和动物分解者调节地下碳和氮的通量，从而控制土壤系统中碳和氮的储存/释放。变暖预计会改变分解者生物量，并加速有机体新陈代谢和土壤碳释放。我们使用三种气候情景（对照，+2°C，+4°C）下两个北方泥炭地地点的 18 个营养节点的经验数据对六个土壤食物网进行了参数化，并使用能量生态计量模型对碳和氮通量、损失和保留进行了建模。食物网模型。不同地点之间微生物生物量的差异决定了变暖情况下的通量。以真菌为主的地区的群落生物量受变暖的影响更大，但在以细菌为主的地区，通量对变暖的反应更敏感。由于气候变暖，这两个地点的土壤食物网代谢效率降低，导致人均碳损失更大，表明这两个系统的长期碳储存潜力都在减弱。