文章基本信息

标题：Grazing increases the temperature sensitivity of soil organic matter decomposition in a temperate grassland
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作者：Jorge Paz-Ferreiro ; Eduardo Medina-Roldán ; Nick J Ostle 等
期刊名称：Environmental Research Letters
印刷版ISSN：1748-9326
电子版ISSN：1748-9326
出版年度：2012
卷号：7
期号：1
页码：014027-014027
DOI：10.1088/1748-9326/7/1/014027
语种：English
出版社：IOP Publishing Ltd
摘要：We tested the effects of ungulate grazing and nutrient availability on the temperature sensitivity of soil respiration (CO₂) and methane (CH₄) emissions in semi-natural temperate grassland. To do this, soil taken from long term grazed and ungrazed grassland was incubated at four temperatures (4, 10, 15 and 20 °C) with two levels of nutrient (NP) addition. The results showed that the variation in soil CO₂ and CH₄ emissions was explained by temperature and grazing, with grazing increasing the temperature sensitivity of CO₂ and CH₄ production by between 15 and 20 °C. This response was constrained by nutrient availability for CO₂, but not CH₄. These findings suggest that grazing could potentially have important impacts on the temperature sensitivity of greenhouse gas emissions in nutrient limited grasslands.