C:N:P stoichiometry as an indicator of Histosol drainage in lowland and mountain forest ecosystems

• 作者: Jaros?aw Lasota Ewa B?ońska
• 来源期刊: 森林生态系统（英文版）
• 年，卷（期）: 2021,（3）
• 页码范围: 513-522
• 页数: 10页
• 语种: 英文

摘要

Background:Peatlands form one of the largest carbon pools in the terrestrial ecosystems, representing approximately one-third of the world's soil carbon. The aim of this study was to evaluate C:N:P stoichiometry as an indicator of changes initialized by dehydration in Histosols of varied origins. Four types of Histosols from lowland and mountain areas were investigated:fibric Histosols, hemic Histosols, sapric Histosols and Histosols drainic. Results:We established the concentration and stoichiometry of carbon, nitrogen and phosphorous in the Histosols, and found marked differences in C:N:P stoichiometry between the different types–especially the dehydrated samples. The mean C:N:P ratio of dehydrated soil was narrower than the C:N:P ratio of soil under the influence of water, which demonstrates that dehydrating Histosols leads to a narrower C:N:P stoichiometry. This is directly related to the intensification of the organic matter mineralisation process and the resulting loss of organic carbon. We recorded a 50％lower carbon stock in the case of Histosols drainic compared to the other types of Histosols. Conclusions:The narrower C:N:P stoichiometry in Histosols drainic is the result of an decrease in the ratio of N and P to the C content. Thus, this study demonstrates that C:N:P stoichiometry is a useful indicator of the changes that occur in Histosols as a result of dehydration.