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Elevated tropospheric CO 2 and O 3 concentrations impair organic pollutant removal from grassland soil.
- Source :
-
Scientific reports [Sci Rep] 2018 Apr 03; Vol. 8 (1), pp. 5519. Date of Electronic Publication: 2018 Apr 03. - Publication Year :
- 2018
-
Abstract
- The concentrations of tropospheric CO <subscript>2</subscript> and O <subscript>3</subscript> have been rising due to human activities. These rising concentrations may have strong impacts on soil functions as changes in plant physiology may lead to altered plant-soil interactions. Here, the effects of eCO <subscript>2</subscript> and eO <subscript>3</subscript> on the removal of polycyclic aromatic hydrocarbon (PAH) pollutants in grassland soil were studied. Both elevated CO <subscript>2</subscript> and O <subscript>3</subscript> concentrations decreased PAH removal with lowest removal rates at elevated CO <subscript>2</subscript> and elevated O <subscript>3</subscript> concentrations. This effect was linked to a shift in soil microbial community structure by structural equation modeling. Elevated CO <subscript>2</subscript> and O <subscript>3</subscript> concentrations reduced the abundance of gram-positive bacteria, which were tightly linked to soil enzyme production and PAH degradation. Although plant diversity did not buffer CO <subscript>2</subscript> and O <subscript>3</subscript> effects, certain soil microbial communities and functions were affected by plant communities, indicating the potential for longer-term phytoremediation approaches. Results of this study show that elevated CO <subscript>2</subscript> and O <subscript>3</subscript> concentrations may compromise the ability of soils to degrade organic pollutants. On the other hand, the present study also indicates that the targeted assembly of plant communities may be a promising tool to shape soil microbial communities for the degradation of organic pollutants in a changing world.
Details
- Language :
- English
- ISSN :
- 2045-2322
- Volume :
- 8
- Issue :
- 1
- Database :
- MEDLINE
- Journal :
- Scientific reports
- Publication Type :
- Academic Journal
- Accession number :
- 29615649
- Full Text :
- https://doi.org/10.1038/s41598-018-23522-z