Carbon Dioxide Dynamics and Controls in a Deep-water Wetland on the Qinghai-Tibetan Plateau

Hirota, Minoru; Tang, Yanhong; Hu, Qiwu; Hirata, Shigeki; Kato, Tomomichi; Mo, Wenhong; Cao, Guangmin; Mariko, Shigeru

doi:10.1007/s10021-006-0029-x

Cited by 72 publications

(54 citation statements)

References 35 publications

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“…4d, e). Our results are consistent with those in previous findings (Heikkinen et al 2002;Hirota et al 2006), which showed that GPP, R eco , and NEE revealed significant linear correlations with the temporal variation in aboveground biomass. On the one hand, aboveground respiration contributed significantly to R eco and therefore the variation in the amount of aboveground biomass modulated the variability in R eco (Wohlfahrt et al 2008).…”

Section: Effects Of Aboveground Biomass On the Co 2 Fluxsupporting

confidence: 93%

“…For example, Zhou et al (2009) reported that the relationships between R eco and soil temperature were well fitted with an exponential function (r 2 ranged from 0.42 to 0.69) in a reed wetland in Northeast China. Hirota et al (2006) demonstrated R eco was exponentially correlated with soil temperature (5 cm), and soil temperature accounted for approximately 48-88 % of variation in R eco in a deepwater wetland on the Qinghai-Tibetan Plateau. The exponential relationship between respiration and soil temperature results from the combined response of microbial and plant respiration to temperature (Wickland et al 2001).…”

Section: Effects Of Soil Temperature and Moisture On Nighttime Neementioning

confidence: 97%

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Environmental Controls on Net Ecosystem CO2 Exchange Over a Reed (Phragmites australis) Wetland in the Yellow River Delta, China

Han

Yang

et al. 2012

Estuaries and Coasts

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Using the Eddy Covariance (EC) technique, we analyzed temporal variation in net ecosystem CO 2 exchange (NEE) and determined the effects of environmental factors on the balance between ecosystem photosynthesis and respiration in a reed (Phragmites australis) wetland in the Yellow River Delta, China. Our results indicated that diurnal and seasonal patterns of NEE and its components (ecosystem respiration (R eco ), gross primary production (GPP)) varied markedly among months for the growing season (May to October). The cumulative CO 2 emission was 1,657 g CO 2 m . The ratio of R eco to GPP in reed wetland was 0.68, which was close to other temperate wetlands. Soil temperature and soil moisture exerted the primary controls on R eco during the growing season. Daytime NEE values during the growing season were strongly correlated with photosynthetically active radiation. Aboveground biomass showed significant linear relationships with 24-h average NEE, daytime GPP, and R eco , respectively. Thus, we conclude that the coastal wetland acted as a carbon sink during the growing season despite the variations in environmental conditions, and long-term flux measurements over these ecosystems are undoubtedly necessary.

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Section: Effects Of Aboveground Biomass On the Co 2 Fluxsupporting

confidence: 93%

Section: Effects Of Soil Temperature and Moisture On Nighttime Neementioning

confidence: 97%

Environmental Controls on Net Ecosystem CO2 Exchange Over a Reed (Phragmites australis) Wetland in the Yellow River Delta, China

Han

Yang

et al. 2012

Estuaries and Coasts

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“…These findings follow the results presented by other authors, Q10 parameters was also described by other authors and for wetlands have been reported as values between 2.2 and 4.2. (Lafleur et al 2005) and from 2.0 to 8.9 (Hirota et al 2006), 2.9-9.4 (Acosta et al 2017). The values of this parameter in our case was ranging from 2.0 to 6.1.…”

Section: Q10 Values Describe the Dynamics Of R Ecomentioning

confidence: 44%

The Impact of Experimental Temperature and Water Level Manipulation on Carbon Dioxide Release in a Poor Fen in Northern Poland

et al. 2018

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Peatlands are ecosystems for which carbon budget relies strongly on the meteorological and hydrological conditions. Here, using a manipulative field experiment, we measured ecosystem respiration (R ECO ) over two years (2013)(2014) ). With the natural dry period event which occurred in 2014, the seasonal R ECO increased by approx. 0.2 μmol CO 2 m −2 s −1 as compared to the previous year. Projected global warming will therefore significantly enhance C loss from poor fens in this region of Europe.

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“…Antarctica (Ding et al, 2013), 102.5 to 166.8 mg CO 2 m À2 h À1 from the littoral zone of an alpine lake on the Tibetan plateau (Hirota et al, 2006), and 14e725 mg CO 2 m À2 h À1 from Japanese fringing zones of Lake Nakaumi (Hirota et al, 2007). However, by comparison, the littoral zone of boreal Lake Kev€ at€ on showed a substantial variation of CO 2 release ranging from 110 to 2340 mg CO 2 m À2 h…”

Section: Ecosystem Respiration and Its Componentsmentioning

confidence: 97%

“…In China, wetland carbon flux studies were concentrated in cold and temperate regions, such as alpine wetlands on the Tibetan Plateau (Hirota et al, 2006;Chen et al, 2009;Zhao et al, 2010), and marshlands in Sanjiang Plain (Ding et al, 2005;Song et al, 2011;Wang et al, 2013). However, the data were rarely available in warm regions (Xu and Tian, 2012;Yu et al, 2013).…”

mentioning

confidence: 99%

Ecosystem respiration and its components from a Carex meadow of Poyang Lake during the drawdown period

Yao

et al. 2015

Atmospheric Environment

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h i g h l i g h t sEcosystem respiration and its components were mainly controlled by temperature. Q 10 values varied widely with time and among ecosystem respiratory components. Summer flood duration could largely alter drawdown period carbon sink intensity. a r t i c l e i n f o a b s t r a c tLittle is known about the components of ecosystem respiration from a subtropical littoral wetland with dramatic annual inundation dynamics. In this study, we investigated ecosystem respiration and its components in a Poyang lake Carex meadow during the drawdown periods from May 2009 to June 2011. Both ecosystem respiration and its components showed clear temporal variation pattern, with temperature being the dominant control. Ecosystem respiration ranged from 98.01 to 1359.25 mg CO 2 m À2 h À1. Shoot and root respiration contributed approximately 36% and 26% to the ecosystem respiration, respectively, whereas microbial respiration accounted for 38% of the ecosystem respiration. The ratio of total soil respiration to ecosystem respiration varied from 0.45 to 0.90, depending on growing season stages. Their Q 10 values ranged from 1.72 to 2.51, with the maximum for shoot respiration and the minimum for microbial respiration. In addition, the Q 10 values varied with time and among ecosystem respiratory components and hence could not be treated as a constant. None of the respiration measurements was significantly related to soil moisture, suggesting that soil moisture was not a limiting environmental factor for respiratory activity during the drawdown periods in this meadow. The Carex meadow acted as strong carbon sink during the drawdown periods due to double growing seasons, but the previous summer flood duration could substantially alter carbon sink intensity in the following drawdown period. The total carbon sink of the littoral zone of Poyang Lake during drawdown periods was estimated to be 0.17e0.59 Tg C yr À1.

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Carbon Dioxide Dynamics and Controls in a Deep-water Wetland on the Qinghai-Tibetan Plateau

Cited by 72 publications

References 35 publications

Environmental Controls on Net Ecosystem CO2 Exchange Over a Reed (Phragmites australis) Wetland in the Yellow River Delta, China

Environmental Controls on Net Ecosystem CO2 Exchange Over a Reed (Phragmites australis) Wetland in the Yellow River Delta, China

The Impact of Experimental Temperature and Water Level Manipulation on Carbon Dioxide Release in a Poor Fen in Northern Poland

Ecosystem respiration and its components from a Carex meadow of Poyang Lake during the drawdown period

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