气候变化领域集成服务门户(CCPortal): The linkage of 13C and 15N soil depth gradients with C:N and O:C stoichiometry reveals tree species effects on organic matter turnover in soil

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DOI	10.1007/s10533-020-00721-3
	The linkage of 13C and 15N soil depth gradients with C:N and O:C stoichiometry reveals tree species effects on organic matter turnover in soil
	Lorenz M.; Derrien D.; Zeller B.; Udelhoven T.; Werner W.; Thiele-Bruhn S.
发表日期	2020
ISSN	0168-2563
起始页码	203
结束页码	220
卷号	151 期号:2020-02-03
英文摘要	The knowledge of tree species dependent turnover of soil organic matter (SOM) is limited, yet required to understand the carbon sequestration function of forest soil. We combined investigations of 13C and 15N and its relationship to elemental stoichiometry along soil depth gradients in 35-year old monocultural stands of Douglas fir (Pseudotsuga menziesii), black pine (Pinus nigra), European beech (Fagus sylvatica) and red oak (Quercus rubra) growing on a uniform post-mining soil. We investigated the natural abundance of 13C and 15N and the carbon:nitrogen (C:N) and oxygen:carbon (O:C) stoichiometry of litterfall and fine roots as well as SOM in the forest floor and mineral soil. Tree species had a significant effect on SOM δ13C and δ15N reflecting significantly different signatures of litterfall and root inputs. Throughout the soil profile, δ13C and δ15N were significantly related to the C:N and O:C ratio which indicates that isotope enrichment with soil depth is linked to the turnover of organic matter (OM). Significantly higher turnover of OM in soils under deciduous tree species depended to 46% on the quality of litterfall and root inputs (N content, C:N, O:C ratio), and the initial isotopic signatures of litterfall. Hence, SOM composition and turnover also depends on additional—presumably microbial driven—factors. The enrichment of 15N with soil depth was generally linked to 13C. In soils under pine, however, with limited N and C availability, the enrichment of 15N was decoupled from 13C. This suggests that transformation pathways depend on litter quality of tree species. © 2020, The Author(s).
英文关键词	Common garden experiment; Litter; Microbial turnover; Recultivated forest soil; Roots; Stable isotopes
语种	英语
来源期刊	Biogeochemistry
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/153084
作者单位	Soil Science Department, FB VI, University of Trier, Behringstrasse 21, Trier, 54296, Germany; INRAe Grand Est Nancy, UR 1138 Biogéochimie des Écosystèmes Forestiers, Nancy, 54000, France; Environmental Remote Sensing & Geoinformatics Department, FB VI, University of Trier, Behringstrasse 21, Trier, 54296, Germany; Geobotany Department, FB VI, University of Trier, Behringstrasse 21, Trier, 54296, Germany
推荐引用方式 GB/T 7714	Lorenz M.,Derrien D.,Zeller B.,et al. The linkage of 13C and 15N soil depth gradients with C:N and O:C stoichiometry reveals tree species effects on organic matter turnover in soil[J],2020,151(2020-02-03).
APA	Lorenz M.,Derrien D.,Zeller B.,Udelhoven T.,Werner W.,&Thiele-Bruhn S..(2020).The linkage of 13C and 15N soil depth gradients with C:N and O:C stoichiometry reveals tree species effects on organic matter turnover in soil.Biogeochemistry,151(2020-02-03).
MLA	Lorenz M.,et al."The linkage of 13C and 15N soil depth gradients with C:N and O:C stoichiometry reveals tree species effects on organic matter turnover in soil".Biogeochemistry 151.2020-02-03(2020).