气候变化领域集成服务门户(CCPortal): Soil nitrogen cycle unresponsive to decadal long climate change in a Tasmanian grassland

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DOI	10.1007/s10533-019-00627-9
	Soil nitrogen cycle unresponsive to decadal long climate change in a Tasmanian grassland
	Rütting T.; Hovenden M.J.
发表日期	2020
ISSN	1682563
卷号	147 期号:1
英文摘要	Increases in atmospheric carbon dioxide (CO2) and global air temperature affect all terrestrial ecosystems and often lead to enhanced ecosystem productivity, which in turn dampens the rise in atmospheric CO2 by removing CO2 from the atmosphere. As most terrestrial ecosystems are limited in their productivity by the availability of nitrogen (N), there is concern about the persistence of this terrestrial carbon sink, as these ecosystems might develop a progressive N limitation (PNL). An increase in the gross soil N turnover may alleviate PNL, as more mineral N is made available for plant uptake. So far, climate change experiments have mainly manipulated one climatic factor only, but there is evidence that single-factor experiments usually overestimate the effects of climate change on terrestrial ecosystems. In this study, we investigated how simultaneous, decadal-long increases in CO2 and temperature affect the soil gross N dynamics in a native Tasmanian grassland under C3 and C4 vegetation. Our laboratory 15N labeling experiment showed that average gross N mineralization ranged from 4.9 to 11.3 µg N g−1 day−1 across the treatment combinations, while gross nitrification was about ten-times lower. Considering all treatment combinations, no significant effect of climatic treatments or vegetation type (C3 versus C4 grasses) on soil N cycling was observed. © 2019, The Author(s).
英文关键词	Elevated CO2; Gross mineralization; Gross nitrification; Nutrient limitation; Warming
学科领域	air temperature; carbon cycle; carbon dioxide; climate change; decadal variation; global warming; grassland; mineralization; nitrification; nitrogen cycle; nutrient limitation; soil nitrogen; terrestrial ecosystem; Australia; Tasmania; Poaceae
语种	英语
scopus关键词	air temperature; carbon cycle; carbon dioxide; climate change; decadal variation; global warming; grassland; mineralization; nitrification; nitrogen cycle; nutrient limitation; soil nitrogen; terrestrial ecosystem; Australia; Tasmania; Poaceae
来源期刊	Biogeochemistry
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/120399
作者单位	Department of Earth Sciences, University of Gothenburg, Gothenburg, Sweden; Biological Sciences, School of Natural Sciences, University of Tasmania, Hobart, Australia
推荐引用方式 GB/T 7714	Rütting T.,Hovenden M.J.. Soil nitrogen cycle unresponsive to decadal long climate change in a Tasmanian grassland[J],2020,147(1).
APA	Rütting T.,&Hovenden M.J..(2020).Soil nitrogen cycle unresponsive to decadal long climate change in a Tasmanian grassland.Biogeochemistry,147(1).
MLA	Rütting T.,et al."Soil nitrogen cycle unresponsive to decadal long climate change in a Tasmanian grassland".Biogeochemistry 147.1(2020).