Greenhouse gas emissions from a constructed wetland—Plants as important sources of carbon

Picek, Tomáš; Čı́žková, Hana; Dusek, J.T.

doi:10.1016/j.ecoleng.2007.06.008

Cited by 164 publications

(90 citation statements)

References 26 publications

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“…For methanogenesis to take place there must be a sufficient amount of labile organic substrate available (Mah et al, 1977), such as dead plant material from the previous growing season and root exudates from the standing vegetation (Mann and Wetzel, 1996;Zhai et al, 2013). Previous studies have reported increasing CH 4 emission rates with increasing content of soil organic matter in different types of wetlands (Le Mer and Roger, 2001;Picek et al, 2007;Serrano-Silva et al, 2014;Sha et al, 2011;Tanner et al, 1997). At Phrag2, where CH 4 emission rates were significantly higher than at the other sites, there was a many-fold higher content of organic carbon and nitrogen in the soil compared to the soils at the other sites, and the reeds at Phrag2 had a very dense root system in the upper soil layers.…”

Section: Ch 4 Emissionsmentioning

confidence: 99%

Factors influencing CO2 and CH4 emissions from coastal wetlands in the Liaohe Delta, Northeast China

Olsson

et al. 2015

Biogeosciences

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Abstract. Many factors are known to influence greenhouse gas emissions from coastal wetlands, but it is still unclear which factors are most important under field conditions when they are all acting simultaneously. The objective of this study was to assess the effects of water table, salinity, soil temperature and vegetation on CH 4 emissions and ecosystem respiration (R eco ) from five coastal wetlands in the Liaohe Delta, Northeast China: two Phragmites australis (common reed) wetlands, two Suaeda salsa (sea blite) marshes and a rice (Oryza sativa) paddy. Throughout the growing season, the Suaeda wetlands were net CH 4 sinks whereas the Phragmites wetlands and the rice paddy were net CH 4 sources emitting 1.2-6.1 g CH 4 m −2 yr −1 . The Phragmites wetlands emitted the most CH 4 per unit area and the most CH 4 relative to CO 2 . The main controlling factors for the CH 4 emissions were water table, temperature, soil organic carbon and salinity. The CH 4 emission was accelerated at high and constant (or managed) water tables and decreased at water tables below the soil surface. High temperatures enhanced CH 4 emissions, and emission rates were consistently low (< 1 mg CH 4 m −2 h −1 ) at soil temperatures < 18 • C. At salinity levels > 18 ppt, the CH 4 emission rates were always low (< 1 mg CH 4 m −2 h −1 ) probably because methanogens were out-competed by sulphate-reducing bacteria. Saline Phragmites wetlands can, however, emit significant amounts of CH 4 as CH 4 produced in deep soil layers are transported through the air-space tissue of the plants to the atmosphere. The CH 4 emission from coastal wetlands can be reduced by creating fluctuating water tables, including water tables below the soil surface, as well as by occasional flooding by high-salinity water. The effects of water management schemes on the biological communities in the wetlands must, however, be carefully studied prior to the management in order to avoid undesirable effects on the wetland communities.

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Section: Ch 4 Emissionsmentioning

confidence: 99%

Factors influencing CO2 and CH4 emissions from coastal wetlands in the Liaohe Delta, Northeast China

Olsson

et al. 2015

Biogeosciences

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“…Most directly, assimilation of nutrients by autotrophs is an important pathway of nutrient transformation in terrestrial, freshwater, and marine ecosystems (Johnson et al 2006;Roberts and Mulholland 2007;Templer et al 2008). However, even in systems where bulk organic matter (OM) is abundant, heterotrophic metabolism and nutrient transformations (both assimilatory and dissimilatory) are often tightly coupled to recent photosynthetic activity or other pathways of OM input (Hamilton and Frank 2001;Vance and Chapin 2001;Picek et al 2007). This relationship is thought to reflect the greater lability of fresh detritus and exudates vis-à -vis older OM pools that persist precisely because of their low nutrient content and structural complexity (Cebrian and Duarte 1995).…”

mentioning

confidence: 99%

Direct and indirect coupling of primary production and diel nitrate dynamics in a subtropical spring-fed river

Heffernan¹,

Cohen²

2010

Limnol. Oceangr.

111

173

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We used high-frequency in situ measurements of nitrate (NO { 3 ) and dissolved oxygen (DO) from the springfed Ichetucknee River, Florida, to derive multiple independent estimates of assimilatory nitrogen (N) demand, and to evaluate the short-term dependence of heterotrophic assimilation and dissimilation (e.g., denitrification) on gross primary productivity (GPP). Autotrophic N assimilation estimates derived from diel DO variability and GPP stoichiometry agreed closely with estimates based on integration of diel variation in NO { 3 concentration, although the correspondence of these metrics depended on the method used to estimate NO { 3 baselines. In addition, day-to-day changes in nocturnal NO { 3 concentration maxima were strongly negatively correlated with day-to-day changes in GPP. Diel temperature variation in the Ichetucknee River indicated that this pattern could not be explained by hydrologic dispersion, while relationships between N assimilation and O 2 production at hourly intervals indicated minimal physiological lags. The estimated magnitude of heterotrophic assimilation was small, indicating that the relationship between changes in GPP and changes in nocturnal NO { 3 maxima reflects sensitivity of denitrification to variation in exudation of labile organic matter by primary producers. We estimate that , 35% of denitrification may be fueled by the previous day's photosynthesis; this result is consistent with the broader hypothesis that the magnitude of autochthonous production in aquatic systems influences the fate of N via both direct and indirect mechanisms.

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“…It is known that this can substantially contribute to the nutrient removal capacity of the wetland (Brix 1994;Kadlec and Knight 1996;Verhoeven and Meuleman 1999). Another advantage is that in this period standing crop is at its optimum (high energy content), the reed is still vital and methane production is limited (Sorrell and Boon 1994;Sorrell et al 1997;Picek et al 2007). However, when nutrients are still located in the plant when harvested, high concentrations of nutrients in the biomass may have corrosive effects on the energy processing plant.…”

Section: Discussionmentioning

confidence: 99%

Surface water sanitation and biomass production in a large constructed wetland in the Netherlands

Meerburg

Vereijken

Visser

et al. 2010

Wetlands Ecol Manage

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In Western-Europe, agricultural practices have contributed to environmental problems such as eutrophication of surface and ground water, flooding, drought and desiccation of surrounding natural habitats. Solutions that reduce the impact of these problems are urgently needed. Common reed (Phragmites australis) is capable of sanitizing surface water and may function as green energy source because of its high productivity. Here, the results of an experiment in a constructed wetland in the Netherlands are presented where two different sanitation treatments were compared. Depending on the residence time and volume per unit area, reed is capable to reduce the total amount of nitrogen in the water with average efficiencies from 32 to 47% and the total amount of phosphorous with 27-45%. Although biomass production still varies largely between different parts of the constructed wetland, a rapid increase in biomass was observed since planting. Constructed wetlands with reed provide opportunities to improve water quality and reed produces enough biomass to serve as green energy source. Moreover, these wetlands also function as a flood water reservoir and are possibly advantageous for biodiversity. The optimal moment of reed harvesting depends on the goal of the owner. This moment should be chosen wisely, as it may have consequences for reed filter regeneration, biomass production, biodiversity, methane emission and water sanitation efficiency.

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Greenhouse gas emissions from a constructed wetland—Plants as important sources of carbon

Cited by 164 publications

References 26 publications

Factors influencing CO<sub>2</sub> and CH<sub>4</sub> emissions from coastal wetlands in the Liaohe Delta, Northeast China

Factors influencing CO<sub>2</sub> and CH<sub>4</sub> emissions from coastal wetlands in the Liaohe Delta, Northeast China

Direct and indirect coupling of primary production and diel nitrate dynamics in a subtropical spring-fed river

Surface water sanitation and biomass production in a large constructed wetland in the Netherlands

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Greenhouse gas emissions from a constructed wetland—Plants as important sources of carbon

Cited by 164 publications

References 26 publications

Factors influencing CO&lt;sub&gt;2&lt;/sub&gt; and CH&lt;sub&gt;4&lt;/sub&gt; emissions from coastal wetlands in the Liaohe Delta, Northeast China

Factors influencing CO&lt;sub&gt;2&lt;/sub&gt; and CH&lt;sub&gt;4&lt;/sub&gt; emissions from coastal wetlands in the Liaohe Delta, Northeast China

Direct and indirect coupling of primary production and diel nitrate dynamics in a subtropical spring-fed river

Surface water sanitation and biomass production in a large constructed wetland in the Netherlands

Contact Info

Product

Resources

About

Factors influencing CO<sub>2</sub> and CH<sub>4</sub> emissions from coastal wetlands in the Liaohe Delta, Northeast China

Factors influencing CO<sub>2</sub> and CH<sub>4</sub> emissions from coastal wetlands in the Liaohe Delta, Northeast China