DOI: 10.1007/s10533-014-9990-1
Scopus记录号: 2-s2.0-84904793254
论文题名: Combined climate factors alleviate changes in gross soil nitrogen dynamics in heathlands
作者: Björsne A.-K. ; Rütting T. ; Ambus P.
刊名: Biogeochemistry
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2014
卷: 120, 期: 2018-01-03 起始页码: 191
结束页码: 201
语种: 英语
英文关键词: Climate change
; Nitrogen cycle
; Summer drought
; Warming
英文摘要: The ongoing climate change affects biogeochemical cycling in terrestrial ecosystems, but the magnitude and direction of this impact is yet unclear. To shed further light on the climate change impact, we investigated alterations in the soil nitrogen (N) cycling in a Danish heathland after 5 years of exposure to three climate change factors, i.e. warming, elevated CO2 (eCO2) and summer drought, applied both in isolation and in combination. By conducting laboratory 15N tracing experiments we show that warming increased both gross N mineralization and nitrification rates. In contrast, gross nitrification was decreased by eCO2, an effect that was more pronounced when eCO2 was combined with warming and drought. Moreover, there was an interactive effect between the warming and CO2 treatment, especially for N mineralization: rates increased at warming alone but decreased at warming combined with eCO2. In the full treatment combination, simulating the predicted climate for the year 2075, gross N transformations were only moderately affected compared to control, suggesting a minor alteration of the N cycle due to climate change. Overall, our study confirms the importance of multifactorial field experiments for a better understanding of N cycling in a changing climate, which is a prerequisite for more reliable model predictions of ecosystems responses to climate change. © 2014 Springer International Publishing Switzerland. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/83623
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 Earth Sciences, University of Gothenburg, Box 460, 405 30 Gothenburg, Sweden; Department of Chemical and Biochemical Engineering, Technical University of Denmark, 2800 Kgs., Lyngby, Denmark
Recommended Citation:
Björsne A.-K.,Rütting T.,Ambus P.. Combined climate factors alleviate changes in gross soil nitrogen dynamics in heathlands[J]. Biogeochemistry,2014-01-01,120(2018-01-03)