Exotic Spartina alterniflora invasion alters ecosystem–atmosphere exchange of CH4 and N2O and carbon sequestration in a coastal salt marsh in China

Coastal salt marshes are sensitive to global climate change and may play an important role in mitigating global warming. To evaluate the impacts of Spartina alterniflora invasion on global warming potential (GWP) in Chinese coastal areas, we measured CH₄and N₂O fluxes and soil organic carbon sequest...

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Bibliographic Details
Published in:Global change biology 2015-04, Vol.21 (4), p.1567-1580
Main Authors: Yuan, Junji, Ding, Weixin, Liu, Deyan, Kang, Hojeong, Freeman, Chris, Xiang, Jian, Lin, Yongxin
Format: Article
Language:English
Subjects:
Air Pollutants - analysis
atmospheric N2O consumption
Carbon - analysis
Carbon Sequestration
China
Climate change
coastal soils
ecological invasion
environmental impact
Estuaries
Global warming
Grasses
greenhouse gas emissions
GWP
Introduced Species
invasive species
methane
Methane - analysis
N-limit
nitrous oxide
Nitrous Oxide - analysis
Nonnative species
Poaceae - physiology
salt marshes
Seasons
Soil - chemistry
soil organic carbon
soil-atmosphere interactions
soil-plant-atmosphere interactions
Spartina alterniflora
Spartina alterniflora invasion
sulfate
Wetlands
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Summary:Coastal salt marshes are sensitive to global climate change and may play an important role in mitigating global warming. To evaluate the impacts of Spartina alterniflora invasion on global warming potential (GWP) in Chinese coastal areas, we measured CH₄and N₂O fluxes and soil organic carbon sequestration rates along a transect of coastal wetlands in Jiangsu province, China, including open water; bare tidal flat; and invasive S. alterniflora, native Suaeda salsa, and Phragmites australis marshes. Annual CH₄emissions were estimated as 2.81, 4.16, 4.88, 10.79, and 16.98 kg CH₄ ha⁻¹for open water, bare tidal flat, and P. australis, S. salsa, and S. alterniflora marshes, respectively, indicating that S. alterniflora invasion increased CH₄emissions by 57–505%. In contrast, negative N₂O fluxes were found to be significantly and negatively correlated (P 
ISSN:1354-1013
1365-2486
DOI:10.1111/gcb.12797