1. Elevated CO2 accelerates polycyclic aromatic hydrocarbon accumulation in a paddy soil grown with rice
- Author
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Ai, Fuxun, Eisenhauer, Nico, Xie, Yuwei, Zhu, Jianguo, Jousset, Alexandre, Du, Wenchao, Yin, Ying, Zhang, Xiaowei, Ji, Rong, Guo, Hongyan, Sub Ecology and Biodiversity, Ecology and Biodiversity, Sub Ecology and Biodiversity, and Ecology and Biodiversity
- Subjects
Atmospheric Science ,Food Safety ,Polycyclic aromatic hydrocarbon ,lcsh:Medicine ,Plant Science ,010501 environmental sciences ,01 natural sciences ,Soil ,Agricultural Soil Science ,Edaphology ,Soil Pollutants ,Polycyclic Aromatic Hydrocarbons ,lcsh:Science ,Soil Microbiology ,chemistry.chemical_classification ,Multidisciplinary ,Ecology ,Plant Anatomy ,Eukaryota ,Soil chemistry ,Agriculture ,04 agricultural and veterinary sciences ,Plants ,Biota ,Chemistry ,Biodegradation, Environmental ,Experimental Organism Systems ,Community Ecology ,Agricultural soil science ,Environmental chemistry ,Physical Sciences ,Seeds ,Soil microbiology ,Research Article ,Pollutants ,Climate Change ,Soil Science ,Crops ,Research and Analysis Methods ,complex mixtures ,Greenhouse Gases ,Plant and Algal Models ,Environmental Chemistry ,Humans ,Grasses ,Community Structure ,0105 earth and related environmental sciences ,Pollutant ,Microbial Viability ,Ecology and Environmental Sciences ,lcsh:R ,Chemical Compounds ,Organisms ,Biology and Life Sciences ,Oryza ,Carbon Dioxide ,chemistry ,Microbial population biology ,Atmospheric Chemistry ,Soil water ,Earth Sciences ,040103 agronomy & agriculture ,0401 agriculture, forestry, and fisheries ,Environmental science ,lcsh:Q ,Rice ,Crop Science ,Cereal Crops - Abstract
The concentration of atmospheric carbon dioxide (CO2) and polycyclic aromatic hydrocarbons (PAHs) contents in the environment have been rising due to human activities. Elevated CO2 (eCO2) levels have been shown to affect plant physiology and soil microbes, which may alter the degradation of organic pollutants. Here, we study the effect of eCO2 on PAH accumulation in a paddy soil grown with rice. We collected soil and plant samples after rice harvest from a free-air CO2 enrichment (FACE) system, which had already run for more than 15 years. Our results show that eCO2 increased PAH concentrations in the soil, and we link this effect to a shift in soil microbial community structure and function. Elevated CO2 changed the composition of soil microbial communities, especially by reducing the abundance of some microbial groups driving PAH degradation. Our study indicates that elevated CO2 levels may weaken the self-cleaning ability of soils related to organic pollutants. Such changes in the function of soil microbial communities may threaten the quality of crops, with unknown implications for food safety and human health in future climate scenarios.
- Published
- 2018