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Soil carbon stabilization in the jack pine boreal forest.

机译：千斤顶松树林中的土壤碳稳定。

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Two existing disturbances in the Canadian boreal forest include fire and harvest, although climate change is expected to soon have a major effect. Hence, the overall objectives of this study were to quantify and compare soil carbon stocks and composition in (1) two jack pine chronosequences of either fire or harvest origin, and (2) along a latitudinal transect. The distribution of carbon was quantified among soil pools, and composition of the forest floors and light fractions was further characterized by CPMAS 13C nuclear magnetic resonance (NMR). While total soil carbon stocks (0-1 m) did not differ between the fire and harvest chronosequences, these were less at the warmer southern site compared to the northern site. Soil carbon within all profiles was dominated by labile pools. The relative importance of this labile carbon increased with time since disturbance in both chronosequences, and reached a maximum at the northern-most site.
机译：尽管预计气候变化很快会产生重大影响，但加拿大北方森林现有的两种干扰包括火灾和采伐。因此，本研究的总体目标是量化和比较（1）着火或收获起源的两个千斤顶松树时序和（2）沿横向样带的土壤碳储量和组成。碳在土壤池中的分布进行了定量，并通过CPMAS 13C核磁共振（NMR）进一步表征了森林地面和轻组分的组成。尽管火势和收获时间序列的土壤总碳储量（0-1 m）没有差异，但与北部站点相比，温暖的南部站点的碳储量较少。在所有剖面内的土壤碳主要由不稳定的库组成。由于两个时间序列的扰动，这种不稳定碳的相对重要性随时间增加，并在最北端达到最大值。

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