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在冬季,季节性雪被覆盖地区伴随着雪被的发育和消融,土壤温度、含水量和土壤冻融状态剧烈波动强烈影响着土壤微生物的动态转变及营养需求的改变,从而对高山地区冬季土壤矿质元素转化、土壤养分供应、植物分布等具有十分重要的影响。大量研究表明,高山生态系统中土壤微生物群落存在明显的季节转换现象,夏季以细菌为主,冬季则以真菌为主。在冬季,土壤微生物的生长和活性都是被可利用碳所限制的。全球变暖背景下,积雪厚度和凋落物供应的改变,必将对土壤碳供应水平产生影响,导致微生物群落的动态变化,从而对土壤中营养物质的利用和循环产生显著效应,这也是该领域新的研究方向之一。
In winter, seasonal snow cover areas are accompanied by the development and ablation of snow cover. The drastic fluctuations of soil temperature, water content and soil freeze-thaw status strongly influence the dynamic changes of soil microorganisms and the changes of nutrient requirements, Mineral element transformation, soil nutrient supply, plant distribution has a very important impact. Numerous studies have shown that there is a clear seasonal change in the soil microbial community in mountain ecosystems, with bacteria being dominant in summer and fungi in winter. In winter, the growth and activity of soil microorganisms are all limited by available carbon. Changes in snow cover and litter supply in the context of global warming are bound to have an impact on soil carbon supply, leading to dynamic changes in microbial communities that have a significant effect on nutrient utilization and circulation in the soil, One of the new areas of research.