globalchange  > 气候减缓与适应
DOI: 10.1007/s10533-016-0262-0
Scopus记录号: 2-s2.0-84991833318
论文题名:
Nitrate and dissolved organic carbon mobilization in response to soil freezing variability
作者: Fuss C.B.; Driscoll C.T.; Groffman P.M.; Campbell J.L.; Christenson L.M.; Fahey T.J.; Fisk M.C.; Mitchell M.J.; Templer P.H.; Durán J.; Morse J.L.
刊名: Biogeochemistry
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2016
卷: 131, 期:2018-01-02
起始页码: 35
结束页码: 47
语种: 英语
英文关键词: Climate change ; Northern hardwood forest ; Snow ; Soil frost ; Soil water ; Winter
Scopus关键词: carbon cycle ; climate change ; dissolved organic carbon ; dissolved oxygen ; field method ; forest ecosystem ; growing season ; mobilization ; nitrate ; nitrogen cycle ; snow cover ; snowpack ; soil nitrogen ; United Nations Framework Convention on Climate Change ; winter ; wood
英文摘要: Reduced snowpack and associated increases in soil freezing severity resulting from winter climate change have the potential to disrupt carbon (C) and nitrogen (N) cycling in soils. We used a natural winter climate gradient based on elevation and aspect in a northern hardwood forest to examine the effects of variability in soil freezing depth, duration, and frequency on the mobilization of dissolved organic carbon (DOC) and nitrate (NO3 −) in soils over the course of 2 years. During a winter with a relatively thin snowpack, soils at lower elevation sites experienced greater freezing and especially variable freeze/thaw cycles, which in turn led to greater leaching of DOC from the organic horizon during the following growing season. In contrast to several previous field manipulation studies, we did not find changes in soil solution NO3 − concentrations related to soil freezing variables. Our results are consistent with a soil matrix disturbance from freezing and thawing which increases leachable C. These results build upon previous laboratory experiments and field manipulations that found differing responses of DOC and NO3 − following soil freezing, suggesting that mobilization of labile C may suppress NO3 − losses through microbial immobilization of N. This research highlights the importance of studying natural variation in winter climate and soil freezing and how they impact soil C and N retention, with implications for surface water runoff quality. © 2016, Springer International Publishing Switzerland.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/83340
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 Civil and Environmental Engineering, Syracuse University, Syracuse, NY, United States; Cary Institute of Ecosystem Studies, Millbrook, NY, United States; Department of Earth and Environmental Sciences, City University of New York Advanced Science Research Center and Brooklyn College, New York, NY, United States; Northern Research Station, U.S. Forest Service, Durham, NH, United States; Biology Department, Vassar College, Poughkeepsie, NY, United States; Department of Natural Resources, Cornell University, Ithaca, NY, United States; Department of Zoology, Miami University, Oxford, OH, United States; Department of Environmental Resources Engineering, SUNY–College of Environmental Science and Forestry, Syracuse, NY, United States; Department of Biology, Boston University, Boston, MA, United States; Center for Functional Ecology, Department of Life Sciences, University of Coimbra, Coimbra, Portugal; Environmental Science and Management, School of the Environment, Portland State University, Portland, OR, United States

Recommended Citation:
Fuss C.B.,Driscoll C.T.,Groffman P.M.,et al. Nitrate and dissolved organic carbon mobilization in response to soil freezing variability[J]. Biogeochemistry,2016-01-01,131(2018-01-02)
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