气候变化领域集成服务门户(CCPortal): Permafrost existence is closely associated with soil organic matter preservation: Evidence from relationships among environmental factors and soil carbon in a permafrost boundary area

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DOI	10.1016/j.catena.2020.104894
	Permafrost existence is closely associated with soil organic matter preservation: Evidence from relationships among environmental factors and soil carbon in a permafrost boundary area
	Liu G.; Wu T.; Hu G.; Wu X.; Li W.
发表日期	2021
ISSN	3418162
卷号	196
英文摘要	Permafrost regions store a large amount of soil organic carbon (SOC). Although permafrost degradation with climate warming can stimulate soil organic matter (SOM) decomposition, it remains unknown that whether the permafrost existence benefits SOM preservation. Here, a boundary area of permafrost and non-permafrost zone was selected to test the hypothesis that SOM underlain by permafrost has been better preserved than the area without permafrost under similar climatic conditions. The interactions among topography, vegetation cover, permafrost, soil variables and SOC distribution were examined. The results showed the sites beneath wet meadow land covers, which are usually underlain by permafrost, have higher SOC stocks than those of alpine meadows without permafrost. Based on mixed effects models, both soil water content and bulk density explained higher SOC content variances in the sites without permafrost than the sites underlain by permafrost. The north-facing non-permafrost sites have significantly higher SOC contents than those in south-facing non-permafrost sites. Vegetation cover, aspect, and permafrost have mixing effects on SOC contents both in permafrost and non-permafrost sites. Soil particle size and the rock fragment content are good predictors for prediction of SOC contents, while the best predictor was depending on the presence of permafrost. These results suggested that under similar climatic conditions, permafrost existence favors the preservation of SOM, this should be taken into consideration in the future carbon emission from permafrost regions since permafrost degradation can lag behind climate warming in many areas. © 2020 Elsevier B.V.
英文关键词	Permafrost; Physico-chemical variables; Qinghai-Tibetan Plateau; Seasonally frozen ground area; Soil organic carbon
语种	英语
scopus关键词	Catena
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/158364
作者单位	School of Environmental and Municipal Engineering; Lan Jiaotong University; 88 West Anning Road; Lanzhou; 730070; China; Cryosphere Research Station on the Qinghai-Tibetan Plateau; State Key Laboratory of Cryospheric Science; Northwest Institute of Eco-Environment and Resources; Chinese Academy of Sciences; 320 West Donggang Road; Lanzhou; 730000; China; School of Civil Engineering; Lanzhou University of Technology; 287 Langongping Road; Lanzhou; 730050; China; Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou); Guangzhou; 511458; China; University of Chinese Academy Sciences; No.19A Yuquan Road; Shijingshan District; Beijing; 100049; China
推荐引用方式 GB/T 7714	Liu G.,Wu T.,Hu G.,et al. Permafrost existence is closely associated with soil organic matter preservation: Evidence from relationships among environmental factors and soil carbon in a permafrost boundary area[J]. 中国科学院西北生态环境资源研究院,2021,196.
APA	Liu G.,Wu T.,Hu G.,Wu X.,&Li W..(2021).Permafrost existence is closely associated with soil organic matter preservation: Evidence from relationships among environmental factors and soil carbon in a permafrost boundary area.,196.
MLA	Liu G.,et al."Permafrost existence is closely associated with soil organic matter preservation: Evidence from relationships among environmental factors and soil carbon in a permafrost boundary area".196(2021).