1. Universal temperature sensitivity of denitrification nitrogen losses in forest soils
- Author
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Yu, Haoming, Duan, Yihang, Mulder, Jan, Dörsch, Peter, Zhu, Weixing, Xu-Ri, Huang, Kai, Zheng, Zhoutao, Kang, Ronghua, Wang, Chao, Quan, Zhi, Zhu, Feifei, Liu, Dongwei, Peng, Shushi, Han, Shijie, Zhang, Yangjian, and Fang, Yunting
- Abstract
Soil nitrous oxide (N2O) and dinitrogen (N2) emissions from denitrification are crucial to the nitrogen (N) cycle. However, the temperature sensitivities (Q10) of gaseous N losses in forest soils are poorly understood, with implications for prediction of N cycle responses to warming. Here, we quantify temperature sensitivities of denitrification-derived potential N2O and N2production. Using soils from 18 forest sites in China along a 4,000 km north–south transect we find that N2O and N2production rates increased with temperature, with large variations across soils. In contrast, the Q10values for N2O (2.1 ± 0.5) and N2(2.6 ± 0.6) were similar across soils. N2was more sensitive to temperature than N2O, suggesting that warming could promote complete denitrification. Moreover, the Q10for denitrification (2.3 ± 0.5) was comparable to Q10for aquatic sediments. This finding of universal temperature sensitivity of gaseous N losses from denitrification will facilitate modelling N losses in response to warming globally.
- Published
- 2023
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