scholarly journals Source and Sink Strength of Carbon Dioxide, Methane and Distribution of Sulfate in Salt-marsh Soils at the Wadden Sea Coast of Northern Germany

2010 ◽  
Vol 11 (2) ◽  
Author(s):  
MD Khan ◽  
H Rashid ◽  
HP Blume ◽  
T Adachi ◽  
U Pfisterer ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Salt Marsh ◽  
Wadden Sea ◽  
Sink Strength ◽  
Northern Germany ◽  
Source And Sink ◽  
Sea Coast

scholarly journals Fluxes of methane and distribution of sulfate as influenced by coastal salt-marsh soil ecosystem of Northern Germany

2017 ◽  
Vol 52 (3) ◽  
pp. 177-186
Author(s):  
HR Khan
Keyword(s):  
Salt Marsh ◽  
Wadden Sea ◽  
Redox Potentials ◽  
Northern Germany ◽  
Annual Average ◽  
Marsh Soil ◽  
Coastal Salt Marsh ◽  
Salt Marsh Soil ◽  
The Mean ◽  
Sea Coast

The study was conducted in Schleswig-Holstein at the Wadden sea coast of Northern Germany to evaluate the possible factors controlling methane (CH4) and sulfate (SO4) dynamics along a toposequence of daily to seasonally ?ooded coastal salt marsh soils. The soil at the top end  of the salt marsh (with a height of 1.8 m above sea level: a.s.l. and a dense vegetation cover) was salic silty to clayic Typic Sulfaquent, while  the soil at the bottom end (with some salt bushes and a 1.4 m a.s.l.) was sandy to silty Haplic Sulfaquent. The mean (depth: 0-100 cm) values  of pH were around 7, and of redox potentials in the Typic Sulfaquent were ranged from -162 to +104 mV during all the seasons. The annual average emissions of CH4 were almost 10 fold higher (0.3 g m-2 a-1) in Haplic Sulfaquent than that (0.03 g m-2 a-1) of the Typic Sulfaquent. In all the pro?les, the concentrations of CH4 were very low and varied signi?cantly (p?0.05) with the seasons and soil depths. The concentrations of CH4 showed no dependence to temperature. The SO4 contents were observed maximum in the Typic Sulfaquent followed by Haplic  Sulfaquent during all the seasons. There is no noticeable correlation was obtained between the SO4 and CH4 concentrations. Moreover, even CH4 was determined at depths where the SO4 concentration in the soil solution was around 1200 mg SO4 L-1.Bangladesh J. Sci. Ind. Res. 52(3), 177-186, 2017

The relation between vegetation zonation, elevation and inundation frequency in a Wadden Sea salt marsh

2002 ◽  
Vol 73 (3) ◽  
pp. 211-221 ◽  
Author(s):  
Anna-C Bockelmann ◽  
Jan P Bakker ◽  
Reimert Neuhaus ◽  
Jochim Lage
Keyword(s):  
Salt Marsh ◽  
Wadden Sea ◽  
Sea Salt ◽  
Vegetation Zonation ◽  
Inundation Frequency

scholarly journals Carbon Dioxide and Methane Emissions from a Temperate Salt Marsh Tidal Creek

2020 ◽  
Author(s):  
Branimir Trifunovic ◽  
Alma Vázquez-Lule ◽  
Margaret Capooci ◽  
Angelia Lyn Seyfferth ◽  
Carlos Moffat ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Salt Marsh ◽  
Tidal Creek ◽  
Methane Emissions

scholarly journals Small waterbodies reduce the carbon sink of a polygonal tundra landscape

2021 ◽  
Author(s):  
Lutz Beckebanze ◽  
Zoé Rehder ◽  
David Holl ◽  
Charlotta Mirbach ◽  
Christian Wille ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Carbon Budget ◽  
Carbon Sink ◽  
Open Water ◽  
Methane Emissions ◽  
The Arctic ◽  
Sink Strength ◽  
Small Waterbodies ◽  
Methane Fluxes ◽  
The Impact

Abstract. Arctic permafrost landscapes have functioned as a global carbon sink for millennia. These landscapes are very heterogeneous, and the omnipresent waterbodies are a carbon source within them. Yet, only a few studies focus on the impact of these waterbodies on the landscape carbon budget. We compare carbon dioxide and methane fluxes from small waterbodies to fluxes from the surrounding tundra using eddy covariance measurements from a tower located between a large pond and semi-terrestrial vegetated tundra. When taking the open-water areas of small waterbodies into account, the carbon dioxide sink strength of the landscape was reduced by 11 %. While open-water methane emissions were similar to the tundra emissions, some parts of the studied pond's shoreline exhibited much higher emissions, underlining the high spatial variability of methane emissions. We conclude that gas fluxes from small waterbodies can contribute significantly to the carbon budget of arctic tundra landscapes. Consequently, changes in arctic hydrology and the concomitant changes in the waterbody distribution may substantially impact the overall carbon budget of the Arctic.

scholarly journals Cushion bogs are stronger carbon dioxide net sinks than moss-dominated bogs as revealed by eddy covariance measurements on Tierra del Fuego, Argentina

2019 ◽  
Vol 16 (17) ◽  
pp. 3397-3423 ◽  
Author(s):  
David Holl ◽  
Verónica Pancotto ◽  
Adrian Heger ◽  
Sergio Jose Camargo ◽  
Lars Kutzbach
Keyword(s):  
Carbon Dioxide ◽  
Eddy Covariance ◽  
Ecosystem Respiration ◽  
Vascular Plant ◽  
Tierra Del Fuego ◽  
Peat Moss ◽  
High Temporal Resolution ◽  
Sink Strength ◽  
Bog Ecosystems ◽  
Annual Nee

Abstract. The near-pristine bog ecosystems of Tierra del Fuego in southernmost Patagonia have so far not been studied in terms of their current carbon dioxide (CO2) sink strength. CO2 flux data from Southern Hemisphere peatlands are scarce in general. In this study, we present CO2 net ecosystem exchange (NEE) fluxes from two Fuegian bog ecosystems with contrasting vegetation communities. One site is located in a glaciogenic valley and developed as a peat moss-dominated raised bog, and the other site is a vascular plant-dominated cushion bog located at the coast of the Beagle Channel. We measured NEE fluxes with two identical eddy covariance (EC) setups at both sites for more than 2 years. With the EC method, we were able to observe NEE fluxes on an ecosystem level and at high temporal resolution. Using a mechanistic modeling approach, we estimated daily NEE models to gap fill and partition the half-hourly net CO2 fluxes into components related to photosynthetic uptake (gross primary production, GPP) and to total ecosystem respiration (TER). We found a larger relative variability of annual NEE sums between both years at the moss-dominated site. A warm and dry first year led to comparably high TER sums. Photosynthesis was also promoted by warmer conditions but less strongly than TER with respect to absolute and relative GPP changes. The annual NEE carbon (C) uptake was more than 3 times smaller in the warm year. Close to the sea at the cushion bog site, the mean temperature difference between both observed years was less pronounced, and TER stayed on similar levels. A higher amount of available radiation in the second observed year led to an increase in GPP (5 %) and NEE (35 %) C uptake. The average annual NEE-C uptake of the cushion bog (-122±76 gm-2a-1, n=2) was more than 4 times larger than the average uptake of the moss-dominated bog (-27±28 gm-2a-1, n=2).

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