globalchange  > 过去全球变化的重建
DOI: 10.1371/journal.pone.0089364
论文题名:
Soil Organic Carbon and Total Nitrogen Gains in an Old Growth Deciduous Forest in Germany
作者: Marion Schrumpf; Klaus Kaiser; Ernst-Detlef Schulze
刊名: PLOS ONE
ISSN: 1932-6203
出版年: 2014
发表日期: 2014-2-20
卷: 9, 期:2
语种: 英语
英文关键词: Forests ; Physical geography ; Paleopedology ; Ecosystems ; Forest ecology ; Temperate forests ; Carbon sink ; Germany
英文摘要: Temperate forests are assumed to be organic carbon (OC) sinks, either because of biomass increases upon elevated CO2 in the atmosphere and large nitrogen deposition, or due to their age structure. Respective changes in soil OC and total nitrogen (TN) storage have rarely been proven. We analysed OC, TN, and bulk densities of 100 soil cores sampled along a regular grid in an old-growth deciduous forest at the Hainich National Park, Germany, in 2004 and again in 2009. Concentrations of OC and TN increased significantly from 2004 to 2009, mostly in the upper 0–20 cm of the mineral soil. Changes in the fine earth masses per soil volume impeded the detection of OC changes based on fixed soil volumes. When calculated on average fine earth masses, OC stocks increased by 323±146 g m−2 and TN stocks by 39±10 g m−2 at 0–20 cm soil depth from 2004 to 2009, giving average annual accumulation rates of 65±29 g OC m−2 yr−1 and 7.8±2 g N m−2 yr−1. Accumulation rates were largest in the upper part of the B horizon. Regional increases in forest biomass, either due to recovery of forest biomass from previous forest management or to fertilization by elevated CO2 and N deposition, are likely causes for the gains in soil OC and TN. As TN increased stronger (1.3% yr−1 of existing stocks) than OC (0.9% yr−1), the OC-to-TN ratios declined significantly. Results of regression analyses between changes in OC and TN stocks suggest that at no change in OC, still 3.8 g TN m−2 yr−1 accumulated. Potential causes for the increase in TN in excess to OC are fixation of inorganic N by the clay-rich soil or changes in microbial communities. The increase in soil OC corresponded on average to 6–13% of the estimated increase in net biome productivity.
URL: http://journals.plos.org/plosone/article/file?id=10.1371/journal.pone.0089364&type=printable
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/20128
Appears in Collections:过去全球变化的重建
影响、适应和脆弱性
科学计划与规划
气候变化与战略
全球变化的国际研究计划
气候减缓与适应
气候变化事实与影响

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作者单位: Max Planck Institute for Biogeochemistry, Hans-Knöll-Straße 10, 07745 Jena, Germany;Soil Sciences, Martin Luther University Halle-Wittenberg, 06120 Halle (Saale), Germany;Max Planck Institute for Biogeochemistry, Hans-Knöll-Straße 10, 07745 Jena, Germany

Recommended Citation:
Marion Schrumpf,Klaus Kaiser,Ernst-Detlef Schulze. Soil Organic Carbon and Total Nitrogen Gains in an Old Growth Deciduous Forest in Germany[J]. PLOS ONE,2014-01-01,9(2)
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