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Impact of Changes in Freezing and Thawing on Foliar Litter Carbon Release in Alpine$/$Subalpine Forests Along an Altitudinal Gradient in the Eastern Tibetan Plateau : Volume 11, Issue 6 (18/06/2014)

By Wu, F.

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Book Id: WPLBN0004005068
Format Type: PDF Article :
File Size: Pages 26
Reproduction Date: 2015

Title: Impact of Changes in Freezing and Thawing on Foliar Litter Carbon Release in Alpine$/$Subalpine Forests Along an Altitudinal Gradient in the Eastern Tibetan Plateau : Volume 11, Issue 6 (18/06/2014)  
Author: Wu, F.
Volume: Vol. 11, Issue 6
Language: English
Subject: Science, Biogeosciences, Discussions
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Historic
Publication Date:
2014
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

Citation

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Tan, B., Wu, F., Yang, W., Peng, C., Zhu, J., & Zhang, J. (2014). Impact of Changes in Freezing and Thawing on Foliar Litter Carbon Release in Alpine$/$Subalpine Forests Along an Altitudinal Gradient in the Eastern Tibetan Plateau : Volume 11, Issue 6 (18/06/2014). Retrieved from http://www.ebooklibrary.org/


Description
Description: Key Laboratory of Ecological Forestry Engineering, Institute of Ecology and Forestry, Sichuan Agricultural University, Chengdu, 611130, China. Carbon (C) release from foliar litter is a primary component in C exchange between the atmosphere and terrestrial ecosystems, but little information is currently related to the effects of freezing and thawing dynamics on C release of foliar litter in cold regions. A two-year field litter decomposition experiment was conducted along an altitudinal gradient (∼2700 m to ∼3600 m) to mimic temperature increases in the eastern Tibetan Plateau. C release was investigated for fresh foliar litter of spruce, fir and birch. The onset of the frozen stage, deep frozen stage, and thawing stage were partitioned according to changes in freezing and thawing dynamics of each winter. High C release was observed in lower altitudes during winter stages, but higher altitudes exhibited high C release during growing season stages. The deep frozen stage showed higher rates of C release than other stages in the second year of decomposition. Negative degree-days showing freezing degree were correlated to C release rates for the deep frozen stages in both years, and this relationship continued for the duration of the experiment, indicating that changes in freezing can directly modify C release from foliar litter. The results suggested that climate warming could delay the onset of C release in fresh litter in this cold region.

Summary
Impact of changes in freezing and thawing on foliar litter carbon release in alpine$/$subalpine forests along an altitudinal gradient in the eastern Tibetan Plateau

Excerpt
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