DOI: 10.1007/s10533-017-0406-x
Scopus记录号: 2-s2.0-85035747149
论文题名: Evidence for the role and fate of water-insoluble condensed tannins in the short-term reduction of carbon loss during litter decay
作者: Shay P.-E. ; Peter Constabel C. ; Trofymow J.A.
刊名: Biogeochemistry
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2018
卷: 137, 期: 2018-01-02 起始页码: 127
结束页码: 141
语种: 英语
英文关键词: Butanol-HCl
; Carbon sequestration
; Douglas-fir
; Poplar
; Proanthocyanidin
; Proximate chemistry
Scopus关键词: alcohol
; biochemistry
; carbon
; chemical analysis
; coastal zone
; concentration (composition)
; coniferous tree
; deciduous tree
; decomposition
; hydrochloric acid
; litter
; moisture
; nitrogen
; phenol
; reduction
; tannin
; temperature gradient
; British Columbia
; Canada
; Pseudotsuga
; Pseudotsuga menziesii
英文摘要: Warmer temperatures associated with climate change have the potential to accelerate litter decay and subsequently release large amounts of carbon stored in soils. Condensed tannins are widespread secondary metabolites, which accumulate to high concentrations in many woody plants and play key roles in forest soil nutrient cycles. Future elevated atmospheric CO2 concentrations are predicted to reduce nitrogen content and increase tannin concentrations in plant tissues, thus reducing litter quality for microbial communities and slowing decomposition rates. How the distinct condensed tannin fractions (water-soluble, acetone:MeOH-soluble and solvent-insoluble) impact soil processes, has not been investigated. We tested the impact of condensed tannin and nitrogen concentrations on decay rates of poplar and Douglas-fir litter at sites spanning temperature and moisture gradients in coastal rainshadow forests in British Columbia, Canada. The three condensed tannin fractions were quantified using recent improvements on the butanol-HCl assay. Decay was assessed based on carbon remaining, while changes in litter chemistry were primarily observed using two methods for proximate chemical analyses. After 0.6 and 1 year of decay, more carbon remained in poplar litter with high, compared to low, condensed tannin concentrations. By contrast, more carbon remained in Douglas fir litter than poplar litter during this period, despite lower condensed tannin concentrations. Rapid early decay was especially attributed to loss of soluble compounds, including water-soluble condensed tannins. Water-insoluble condensed tannin fractions, which were transformed to acid-unhydrolyzable residues over time, were associated with reduced carbon loss in high condensed tannin litter. © 2017, Springer International Publishing AG, part of Springer Nature. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/83191
Appears in Collections: 气候减缓与适应 气候变化事实与影响
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作者单位: Department of Biology, Centre for Forest Biology, University of Victoria, P.O. Box 3020 STN CSC, Victoria, BC, Canada; Canadian Forest Service, Pacific Forestry Centre, Natural Resources Canada, Victoria, BC, Canada
Recommended Citation:
Shay P.-E.,Peter Constabel C.,Trofymow J.A.. Evidence for the role and fate of water-insoluble condensed tannins in the short-term reduction of carbon loss during litter decay[J]. Biogeochemistry,2018-01-01,137(2018-01-02)