Greenhouse Gas Fluxes Vary Between Phragmites Australis and Native Vegetation Zones in Coastal Wetlands Along a Salinity Gradient

Wetlands ◽  
2015 ◽  
Vol 35 (6) ◽  
pp. 1021-1031 ◽  
Author(s):  
Rose M. Martin ◽  
Serena Moseman-Valtierra
Keyword(s):  
Greenhouse Gas ◽  
Phragmites Australis ◽  
Coastal Wetlands ◽  
Salinity Gradient ◽  
Native Vegetation ◽  
Vegetation Zones ◽  
Gas Fluxes ◽  
Greenhouse Gas Fluxes

scholarly journals Restoration impacts on rates of denitrification and greenhouse gas fluxes from tropical coastal wetlands

2021 ◽  
pp. 149577
Author(s):  
Sophie A. Comer-Warner ◽  
Anh T.Q. Nguyen ◽  
Minh N. Nguyen ◽  
Manlin Wang ◽  
Antony Turner ◽  
...  
Keyword(s):  
Greenhouse Gas ◽  
Coastal Wetlands ◽  
Gas Fluxes ◽  
Greenhouse Gas Fluxes

Patterns and environmental drivers of greenhouse gas fluxes in the coastal wetlands of China: A systematic review and synthesis

2020 ◽  
Vol 186 ◽  
pp. 109576
Author(s):  
Minjie Hu ◽  
Jordi Sardans ◽  
Xianyu Yang ◽  
Josep Peñuelas ◽  
Chuan Tong
Keyword(s):  
Systematic Review ◽  
Greenhouse Gas ◽  
Coastal Wetlands ◽  
Environmental Drivers ◽  
Gas Fluxes ◽  
Greenhouse Gas Fluxes

Greenhouse gas fluxes of Wadden Sea salt marshes strongly vary among different vegetation zones

2020 ◽  
Author(s):  
Miriam Fuss ◽  
Norman Rueggen ◽  
Peter Mueller ◽  
Stefanie Nolte ◽  
Lars Kutzbach
Keyword(s):  
Greenhouse Gases ◽  
Greenhouse Gas ◽  
Water Level ◽  
Salt Marshes ◽  
Ecosystem Respiration ◽  
Water Level Fluctuations ◽  
High Marsh ◽  
Vegetation Zones ◽  
Gas Fluxes ◽  
Greenhouse Gas Fluxes

<p>Salt marshes are highly valuable Blue Carbon ecosystems in the transition zone between marine and terrestrial environments. They play an important role in mitigating climate change due to high carbon sequestration rates through photosynthetic CO<sub>2</sub> uptake. However, it is poorly understood when and under which conditions they act as sinks or sources for other greenhouse gases like CH<sub>4</sub> and N<sub>2</sub>O.  A complex interplay of abiotic and biotic factors characterizes the biogeochemistry of these dynamic coastal wetland ecosystems. This interplay is in turn controlled by elevation in respect to mean high water level and the resulting inundation frequency.</p><p>We measured land‑atmosphere fluxes of CH<sub>4</sub>, N<sub>2</sub>O and CO<sub>2</sub> due to ecosystem respiration at Hamburger Hallig, North Frisia, Germany, combining a closed chamber approach with in situ‑measurements of a portable Fourier transform infrared absorption spectrometer (DX4015, Gasmet). Biweekly (Apr-Sept) and monthly (Oct-Mar) campaigns have started in December 2018 and cover the whole elevational gradient from the pioneer zone over the low marsh up to the high marsh.</p><p>While ecosystem respiration showed high variability over the seasonal course with fluxes up to +67 mmol*h<sup>-1</sup>*m<sup>-2</sup>, CH<sub>4</sub> and N<sub>2</sub>O fluxes indicated a strong dependence on elevation and thus vegetation zone. Emissions of CH<sub>4</sub> occurred only in the most frequently flooded pioneer zone (+0.17 to +0.35 µmol*h<sup>-1</sup>*m<sup>-2</sup>), whereas the less frequently flooded zones of the low and high marsh acted as CH<sub>4</sub> sinks (down to -1.1 µmol*h<sup>-1</sup>*m<sup>-2</sup>). Contrastingly, N<sub>2</sub>O solely showed positive fluxes (up to +1.0 µmol*h<sup>-1</sup>*m<sup>-2</sup>) in the high marsh and the more frequently flooded zones acted as sinks for N<sub>2</sub>O (down to ‑0.21 µmol*h<sup>-1</sup>*m<sup>-2</sup>). Air temperature and tidal sea water level fluctuations could already be identified as additional environmental drivers of varying greenhouse gas fluxes. Further analysis of abiotic and biotic driver variables will elucidate their impact in detail.</p><p>Our findings show that salt marshes are not only effective in assimilating CO<sub>2</sub>. They also show the ability to take up the strong greenhouse gases CH<sub>4</sub> and N<sub>2</sub>O in certain vegetation zones, emphasizing their important role in mitigating global warming.</p>

Greenhouse gas fluxes in a no-tillage chronosequence in Central Ohio

2022 ◽  
Vol 218 ◽  
pp. 105313
Author(s):  
Serdar Bilen ◽  
Pierre-Andre Jacinthe ◽  
Raj Shrestha ◽  
Sindhu Jagadamma ◽  
Toru Nakajima ◽  
...  
Keyword(s):  
Greenhouse Gas ◽  
No Tillage ◽  
Gas Fluxes ◽  
Greenhouse Gas Fluxes

Monitoring Greenhouse Gas Fluxes in Agro-ecosystems

2018 ◽  
pp. 25-50
Author(s):  
Sunayan Saha ◽  
Paramjit Singh Minhas ◽  
Ramlal Choudhary
Keyword(s):  
Greenhouse Gas ◽  
Gas Fluxes ◽  
Greenhouse Gas Fluxes
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