Climate warming, but not Spartina alterniflora invasion, enhances wetland soil HONO and NOx emissions

Dianming Wu; Lingling Deng; Yihua Sun; Ruhai Wang; Li Zhang; Rui Wang; Yaqi Song; Zhiwei Gao; Haroon Haider; Yue Wang; Lijun Hou; Min Liu

doi:10.1016/j.scitotenv.2022.153710

Climate warming, but not Spartina alterniflora invasion, enhances wetland soil HONO and NO_x emissions

Sci Total Environ. 2022 Jun 1:823:153710. doi: 10.1016/j.scitotenv.2022.153710. Epub 2022 Feb 8.

Authors

Dianming Wu¹, Lingling Deng², Yihua Sun³, Ruhai Wang⁴, Li Zhang⁵, Rui Wang², Yaqi Song⁶, Zhiwei Gao², Haroon Haider², Yue Wang², Lijun Hou⁷, Min Liu⁸

Affiliations

¹ Key Laboratory of Geographic Information Science (Ministry of Education), School of Geographic Sciences, East China Normal University, 200241 Shanghai, China; Institute of Eco-Chongming (IEC), 202162 Shanghai, China. Electronic address: dmwu@geo.ecnu.edu.cn.
² Key Laboratory of Geographic Information Science (Ministry of Education), School of Geographic Sciences, East China Normal University, 200241 Shanghai, China.
³ Shenzhen Key Laboratory of Marine Microbiome Engineering, Institute for Advanced Study, Shenzhen University, 518060 Shenzhen, China.
⁴ State Key Laboratory of Soil and Sustainable Agriculture, Institute of soil Sciences, Chinese Academy of Sciences, 210008 Nanjing, China.
⁵ School of Resources and Environment, Anhui Agricultural University, 230036 Hefei, China.
⁶ Key Laboratory of Geographic Information Science (Ministry of Education), School of Geographic Sciences, East China Normal University, 200241 Shanghai, China; College of Biology and the Environment, Co-Innovation Center for the Sustainable Forestry in Southern China, Nanjing Forestry University, 210037 Nanjing, China.
⁷ State Key Laboratory of Estuarine and Coastal Research, East China Normal University, 200241 Shanghai, China.
⁸ Key Laboratory of Geographic Information Science (Ministry of Education), School of Geographic Sciences, East China Normal University, 200241 Shanghai, China; Institute of Eco-Chongming (IEC), 202162 Shanghai, China.

PMID: 35149064
DOI: 10.1016/j.scitotenv.2022.153710

Abstract

Climate warming and invasive plant growth (plant invasion) may aggravate air pollution by affecting soil nitrogen (N) cycling and the emissions of reactive N gases, such as nitrous acid (HONO) and nitrogen oxides (NO_x). However, little is known about the response of soil NO_y (HONO + NO_x) emissions and microbial functional genes to the interaction of climate warming and plant invasion. Here, we found that experimental warming (approximately 1.5 °C), but not Spartina alterniflora invasion, increased NO_y emissions (0-140 ng N m^-2 s^-1) of treated wetland soils by 4-10 fold. Warming also decreased soil archaeal and fungal richness and diversity, shifted their community structure (e.g., decreased the archaeal classes Thermoplasmata and Iainarchaeia, and increased the archaeal genus Candidatus Nitrosoarchaeum, and the fungal classes Saccharomycetes and Tritirachiomycetes), and decreased the overall abundance of soil N cycling genes. Structural equation modeling revealed that warming-associated changes in edaphic factors and the microbial N cycling potential are responsible for the observed increase in soil NO_y emissions. Collectively, the results showed that climate warming accelerates soil N cycling by stimulating large soil HONO and NO_x emissions, and influences air quality by contributing to atmospheric reactive N and ozone cycling.

Keywords: Air pollution; Experimental warming; Nitrogen oxides; Soil nitrogen cycle; Spartina alterniflora.

MeSH terms

Nitrogen
Poaceae / physiology
Soil Microbiology
Soil* / chemistry
Wetlands*

Substances

Soil
Nitrogen