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How Time since Forest Fire Affects Stand Structure, Soil Physical-Chemical Properties and Soil CO 2 Efflux in Hemiboreal Scots Pine Forest Fire Chronosequence?

机译：森林火灾影响半实体苏格兰松林火灾时序的林分结构，土壤物理化学性质和土壤CO 2流出的时间如何？

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摘要

We compared the changes in aboveground biomass and initial recovery of C pools and CO 2 efflux following fire disturbances in Scots pine ( Pinus sylvesteris L.) stands with different time since stand-replacing fire. The study areas are located in hemiboreal vegetation zone, in north-western Estonia, in Vihterpalu. Six areas where the last fire occurred in the year 1837, 1940, 1951, 1982, 1997, and 2008 were chosen for the study. Our results show that forest fire has a substantial effect on the C content in the top soil layer, but not in the mineral soil layers. Soil respiration showed a chronological response to the time since the forest fire and the values were lowest in the area where the fire was in the year 2008. The respiration values also followed seasonal pattern being highest in August and lowest in May and November. The CO 2 effluxes were lowest on the newly burned area through the entire growing season. There was also a positive correlation between soil temperature and soil respiration values in our study areas.
机译：我们比较了自替换林地起不同时间的苏格兰松（Pinus sylvesteris L.）林分发生火灾后，地上生物量的变化以及碳库和CO 2外排的初始恢复。研究区域位于爱沙尼亚西北部维特帕卢的半实地植被区。选择了在1837年，1940年，1951年，1982年，1997年和2008年发生最后一次火灾的六个区域。我们的结果表明，森林火灾对土壤表层的碳含量有很大影响，但对矿物土壤层的碳含量没有影响。土壤呼吸对自森林火灾以来的时间呈时间响应，其值在2008年发生森林火灾的地区最低。呼吸值也遵循季节性模式，在8月最高，5月和11月最低。在整个生长季节中，新燃烧区域的CO 2流出量最低。在我们的研究区域中，土壤温度与土壤呼吸值之间也呈正相关。

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