Andrew Carrie, Lilleskov Erik A
Forest Resources and Environmental Sciences, Michigan Technological University, 1400 Townsend Drive, Houghton, MI, 49931, USA,
Mycorrhiza. 2014 Nov;24(8):581-93. doi: 10.1007/s00572-014-0577-4. Epub 2014 Apr 13.
Despite the critical role of EMF in nutrient and carbon (C) dynamics, combined effects of global atmospheric pollutants on ectomycorrhizal fungi (EMF) are unclear. Here, we present research on EMF root-level community responses to elevated CO2 and O3. We discovered that belowground EMF community richness and similarity were both negatively affected by CO2 and O3, but the effects of CO2 and O3 on EMF communities were contingent on a site soil pH and cation availability gradient. These results contrast with our previous work showing a strong direct effect of CO2 and O3 on sporocarp community dynamics and production. We discuss the possible role of carbon demand and allocation by EMF taxa in the discrepancy of these results. EMF communities were structured by a legacy of spatially defined soil properties, changing atmospheric chemistry and temporal dynamics. It is therefore necessary to understand global change impacts across multiple environmental gradients and spatiotemporal scales.
尽管外生菌根真菌（EMF）在养分和碳（C）动态中起着关键作用，但全球大气污染物对外生菌根真菌的综合影响尚不清楚。在此，我们展示了关于外生菌根真菌根系群落对升高的二氧化碳和臭氧的响应的研究。我们发现，地下外生菌根真菌群落的丰富度和相似性均受到二氧化碳和臭氧的负面影响，但二氧化碳和臭氧对外生菌根真菌群落的影响取决于场地土壤pH值和阳离子有效性梯度。这些结果与我们之前的研究形成对比，之前的研究表明二氧化碳和臭氧对子实体群落动态和产量有强烈的直接影响。我们讨论了外生菌根真菌类群的碳需求和分配在这些结果差异中可能发挥的作用。外生菌根真菌群落由空间定义的土壤性质、不断变化的大气化学和时间动态的遗留因素构成。因此，有必要了解全球变化在多个环境梯度和时空尺度上的影响。
