Journal ArticleDOI
Invasive alien plants increase CH 4 emissions from a subtropical tidal estuarine wetland
TLDR
In this paper, the authors compared CH4 flux from the exotic invasive plant S. alterniflora with measurements from the aggressive native species Phragmites australis and the native species C. malaccensis following 3-years of monitoring.Abstract:
Methane (CH4) is an important greenhouse gas whose emission from the largest source, wetlands is controlled by a number of environmental variables amongst which temperature, water-table, the availability of substrates and the CH4 transport properties of plants are most prominent and well characterised. Coastal wetland ecosystems are vulnerable to invasion by alien plant species which can make a significant local contribution to altering their species composition. However the effect of these changes in species composition on CH4 flux is rarely examined and so is poorly understood. Spartina alterniflora, a perennial grass native to North America, has spread rapidly along the south-east coast of China since its introduction in 1979. From 2002, this rapid invasion has extended to the tidal marshes of the Min River estuary, an area that, prior to invasion was dominated by the native plant Cyperus malaccensis. Here, we compare CH4 flux from the exotic invasive plant S. alterniflora with measurements from the aggressive native species Phragmites australis and the native species C. malaccensis following 3-years of monitoring. CH4 emissions were measured over entire tidal cycles. Soil CH4 production potentials were estimated for stands of each of above plants both in situ and in laboratory incubations. Mean annual CH4 fluxes from S. alterniflora, P. australis and C. malaccensis dominated stands over the 3 years were 95.7 (±18.7), 38.9 (±3.26) and 10.9 (±5.26) g m−2 year−1, respectively. Our results demonstrate that recent invasion of the exotic species S. alterniflora and the increasing presence of the native plant P. australis has significantly increased CH4 emission from marshes that were previously dominated by the native species C. malaccensis. We also conclude that higher above ground biomass, higher CH4 production and more effective plant CH4 transport of S. alterniflora collectively contribute to its higher CH4 emission in the Min River estuary.read more
Citations
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Impacts of invasive alien marine species on ecosystem services and biodiversity: a pan-European review.
Stelios Katsanevakis,Inger Wallentinus,Argyro Zenetos,Erkki Leppäkoski,Melih Ertan Çinar,Bayram Öztürk,Michał Grabowski,Daniel Golani,Ana Cristina Cardoso +8 more
TL;DR: Kanevakis*, Inger Wallentinus, Argyro Zenetos, Erkki Leppakoski, Melih Ertan Cinar, Bayram Ozturk, Michal Grabowski, Daniel Golani and Ana Cristina Cardoso European Commission, Joint Research Centre (JRC), Institute for Environment and Sustainability (IES), Ispra, Italy Department of Biological and Environmental Sciences, University of Gothenburg, Sweden Institute of Marine Biological Resources and Inland Waters, Hellenic Centre for Marine Research, Ag.
Journal ArticleDOI
Exotic Spartina alterniflora invasion alters ecosystem-atmosphere exchange of CH4 and N2O and carbon sequestration in a coastal salt marsh in China
TL;DR: The results indicate that although S. alterniflora invasion stimulates CH4 emissions, it can efficiently mitigate increases in atmospheric CO2 and N2O along the coast of China.
Journal ArticleDOI
Seasonal changes of CO2, CH4 and N2O fluxes in different types of alpine grassland in the Qinghai-Tibetan Plateau of China
Yuanyuan Li,Shikui Dong,Shiliang Liu,Huakun Zhou,Qingzhu Gao,Guangmin Cao,Xuexia Wang,Xukun Su,Yong Zhang,Lin Tang,Haidi Zhao,Xiaoyu Wu +11 more
TL;DR: In this article, the influence of grassland degradation and grassland use type changes on gases fluxes was examined in three alpine ecosystems (alpine meadow, alpine steppe and alpine desert) with healthy and degraded grasslands on the Qinghai-Tibetan Plateau in May, August and October 2013.
Journal ArticleDOI
Effects of Spartina alterniflora invasion on the communities of methanogens and sulfate-reducing bacteria in estuarine marsh sediments
TL;DR: Community structures of methanogens and sulfate-reducing bacteria (SRB) as a function of Spartina alterniflora invasion in Phragmites australis-vegetated sediments of the Dongtan wetland in the Yangtze River estuary, China, were investigated using 454 pyrosequencing and quantitative real-time PCR.
Journal ArticleDOI
Conversion of coastal wetlands, riparian wetlands, and peatlands increases greenhouse gas emissions: A global meta-analysis.
Li-Shan Tan,Zhen-Ming Ge,Zhen-Ming Ge,Xuhui Zhou,Shi-Hua Li,Xiuzhen Li,Xiuzhen Li,Jianwu Tang,Jianwu Tang +8 more
TL;DR: A global meta-analysis with a database of 209 sites to examine the effects of LULCC types of constructed wetlands, croplands, aquaculture ponds, drained wetlands, and pastures on the variability in CO2, CH4 and N2 O emissions from the natural coastal wetlands, riparian wetlands and peatlands highlights the significant role of LulCC in increasing comprehensive GHG emissions from global natural wetlands.
References
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