Influence of summer flood on the net ecosystem exchange of CO2 in a temperate sedge-grass marsh

Dusek, J.T.; Čı́žková, Hana; Czerný, Radek; Taufarová, Klára; Šmídová, M.; Janouš, Dalibor

doi:10.1016/j.agrformet.2009.04.007

Cited by 47 publications

(56 citation statements)

References 34 publications

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“…5b), has been reported in few wetland ecosystems (e.g. Dusek et al, 2009). Wet seasons in most temperate wetlands coincide with the growing season, thus periods of maximum CO 2 uptake (Roulet et al, 2007;Bonneville et al, 2008;.…”

Section: The Role Of Water In Ecosystem Co 2 Exchangementioning

confidence: 99%

“…In relation to temperate wetlands where year-round measurements of EC are more common, annual values of ecosystem CO 2 exchange in this short-hydroperiod marsh were quite low (Bonneville et al, 2008;Dusek et al, 2009). Of particular note was the low GEP (496 g C m -2 year -1 ) in the Everglades, a value that was constrained by the limitation of CO 2 uptake during the wet season (Table 1, Fig.…”

Section: Annual Ecosystem Co 2 Exchangementioning

confidence: 99%

“…Bonneville et al, 2008;Dusek et al, 2009). These studies reinforce that wetlands are highly productive and important in global carbon cycling, but provide limited insight into wetland CO 2 exchange dynamics at lower latitudes.…”

Section: Introductionmentioning

confidence: 99%

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Seasonal differences in the CO2 exchange of a short-hydroperiod Florida Everglades marsh

Schedlbauer

Oberbauer

Starr

et al. 2010

Agricultural and Forest Meteorology

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Although wetlands are among the world's most productive ecosystems, little is known of long-term CO 2 exchange in tropical and subtropical wetlands. The Everglades is a highly managed wetlands complex occupying >6000 km 2 in south Florida. This ecosystem is oligotrophic, but extremely high rates of productivity have been previously reported. To evaluate CO 2 exchange and its response to seasonality (dry vs. wet season) in the Everglades, an eddy covariance tower was established in a short-hydroperiod marl marsh. Rates of net ecosystem exchange and ecosystem respiration were small year-round and declined in the wet season relative to the dry season. Inundation reduced macrophyte CO 2 uptake, substantially limiting gross ecosystem production. While light and air temperature exerted the primary controls on net ecosystem exchange and ecosystem respiration in the dry season, inundation weakened these relationships. The ecosystem shifted from a CO 2 sink in the dry season to a CO 2 source in the wet season; however, the marsh was a small carbon sink on an annual basis. Net ecosystem production, ecosystem respiration, and gross ecosystem production were -49.9, 446.1 and 496.0 g C m -2 year -1 , respectively. Unexpectedly low CO 2 flux rates and annual production distinguish the Everglades from many other wetlands. Nonetheless, impending changes in water management are likely to alter the CO 2 balance of this wetland and may increase the source strength of these extensive short-hydroperiod wetlands.3

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Section: The Role Of Water In Ecosystem Co 2 Exchangementioning

confidence: 99%

Section: Annual Ecosystem Co 2 Exchangementioning

confidence: 99%

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Seasonal differences in the CO2 exchange of a short-hydroperiod Florida Everglades marsh

Schedlbauer

Oberbauer

Starr

et al. 2010

Agricultural and Forest Meteorology

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“…Among the plants dominating the wetland are short and tall sedge marshes (Caricion fuscae and Carex acuta), expanding stinging nettle (Urtica dioica) and reed canary grass Phalaris arundinacea. (Dušek et al [4]). …”

Section: Localitymentioning

confidence: 99%

Ecosystem services of natural floodplain segment – Lužnice River, Czech Republic

Pithart¹,

ováková²,

Žaloudík³

et al. 2010

WIT Transactions on Ecology and the Environment

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The river Lužnice floodplain in south Bohemia with a preserved floodplain ecosystem and hydrological regime has been investigated for selected ecosystem services (ES): flood mitigation, biodiversity refuge, carbon sequestration, and production of commodities. Two contrasting scenarios at 5 km long studying floodplain segment were compared: near-nature state as it is (Scenario A) and virtually transformed floodplain (Scenario B). For the flood mitigation service, we used an output from hydraulic analysis of modelled flood events (model FAST 2D) showing the effective retention volume 2.3 mil m 3 for A and 0.83 m 3 for B. For monetary evaluation, we used the method of replacement cost of this retention volume. For biodiversity refuge, the value of biotopes (real for A and arbitrary for B) and their contribution to the floodplain area were analysed according to the Hessen method. Carbon sequestration was measured by eddy-covariance method. All ES for both scenarios were converted to monetary value and scenarios A and B were compared. The contribution of particular ES to the total ecosystem value showed the importance of flood mitigation and biodiversity refugium compared to other services. Overall floodplain value was estimated as 17 213 EUR ha. .yr -1 for state as it is (A) and 6 254 EUR ha. .yr -1 for transformed floodplain (B), i.e. virtual floodplain transformation decreased its value to 36%.

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“…They often demonstrate the impact of anomalies, such as drought (Schwalm et al, 2012), flood (Dušek et al, 2009), and volcanic eruption (Gu et al, 2003). Other studies have analysed responses of CO 2 uptake to different types of radiation (Knohl and Baldocchi, 2008;Niyogi et al, 2004;Oliphant et al, 2011;Urban et al, 2007Urban et al, , 2012, vapour pressure deficit, and temperature (Dewar et al, 1999;Pingintha et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Forest Ecosystem as a Source of Co2 During Growing Season: Relation to Weather Conditions

Taufarová¹,

Havránková²,

Dvorská³

et al. 2014

International Agrophysics

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A b s t r a c t. Net ecosystem production reflects the potential of the ecosystem to sequestrate atmospheric CO 2 . Daily net ecosystem production of a mountain Norway spruce forest of the temperate zone (Czech Republic) was determined using the eddy covariance method. Growing season days when the ecosystem was a CO 2 source were examined with respect to current weather conditions. During the 2005, 2006, and 2007 growing seasons, there were 44, 65, and 39 days, respectively, when the forest was a net CO 2 source. The current weather conditions associated with CO 2 release during the growing seasons were: cool and overcast conditions at the beginning or end of the growing seasons characterized by a 3-year mean net ecosystem production of -7.2 kg C ha -1 day -1 ; overcast or/and rainy days (-23.1 kg C ha -1 day -1 ); partly cloudy and hot days (-11.8 kg C ha -1 day -1 ); and overcast and hot days (-13.5 kg C ha -1 day -1 ). CO 2 release was the highest during the overcast or/and rainy conditions (84%, average from all years), which had the greatest impact during the major production periods. As forests are important CO 2 sinks and more frequent weather extremes are expected due to climate change, it is important to predict future forest carbon balances to study the influence of heightened variability in climatic variables.K e y w o r d s: net ecosystem production, CO 2 source days, eddy covariance, weather conditions, Norway spruce INTRODUCTIONThe net carbon budget of ecosystems consists in a fine balance between processes of carbon acquisition (such as photosynthesis, tree and plant growth, and carbon accumulation in soils) and carbon release (such as respiration of living biomass, tree mortality, microbial decomposition of dead biomass, oxidation of soil carbon, degradation and disturbance) (Malhi et al., 1999). The carbon budget expresses the ability of ecosystems to sequestrate atmospheric CO 2 . If acquisition prevails, ecosystems are considered carbon sinks. The differences among various types of ecosystems in their CO 2 sequestration potentials are large (Litton et al., 2007;Marek et al., 2011), as the aforementioned processes operate on a variety of time scales and are influenced by a number of factors. These factors include climate and meteorological parameters (amount and quality of radiation, temperature, and humidity); physiological state of the ecosystem (its age, structure, species composition, and history); water, nutrient, and substrate availability; and such ecosystem disturbances as diseases, insects, and thinning (Dore et al., 2012;Xenakis et al., 2012).Some ecosystem responses to environmental variations are immediate and direct, such as that of photosynthesis responding to light, temperature, soil moisture, and saturation deficit (Baldocchi et al., 1997;Chen et al., 1999) and respiration to temperature, soil moisture (Chen et al., 1999), and organic substrate availability (Kuzyakov and Gavrichkova, 2010). Others are indirect, mediated through such associated biophysical factors as leaf phenolo...

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Influence of summer flood on the net ecosystem exchange of CO2 in a temperate sedge-grass marsh

Cited by 47 publications

References 34 publications

Seasonal differences in the CO2 exchange of a short-hydroperiod Florida Everglades marsh

Seasonal differences in the CO2 exchange of a short-hydroperiod Florida Everglades marsh

Ecosystem services of natural floodplain segment – Lužnice River, Czech Republic

Forest Ecosystem as a Source of Co2 During Growing Season: Relation to Weather Conditions

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