Fluxes of carbon dioxide, methane and nitrous oxide in two contrastive fringing zones of coastal lagoon, Lake Nakaumi, Japan

Hirota, Minoru; Senga, Yukiko; Seike, Yasushi; Nohara, Seiichi; Kunii, Hidenobu

doi:10.1016/j.chemosphere.2007.01.002

Cited by 136 publications

(101 citation statements)

References 25 publications

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“…The littoral zone of lakes has been regarded as hotspots of CH 4 fluxes through several studies (Juutinen et al, 2001;Kankaala et al, 2003;Wang et al, 2006;Hirota et al, 2007). In the present study we also found that CH 4 efflux from the littoral zone of Huahu Lake on the Qinghai-Tibetan Plateau was relatively high among those of boreal and temperate lakes (Juutinen et al, 2001, Kankaala et al, 2003, Wang et al, 2006; summarized in Table 4) and higher than those from alpine wetlands in the same region (Hirota et al, 2004;Chen et al, 2008).…”

Section: Discussionsupporting

confidence: 65%

High methane emissions from a littoral zone on the Qinghai-Tibetan Plateau

Chen

Yao

et al. 2009

Atmospheric Environment

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Section: Discussionsupporting

confidence: 65%

High methane emissions from a littoral zone on the Qinghai-Tibetan Plateau

Chen

Yao

et al. 2009

Atmospheric Environment

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“…Especially, significant differences in EC, total C, total N, NH 4 + -N and NO 3 − -N among the four positions. Such differences would be due to the site-specific conditions such as topography, aspect, slope, hydrology, species composition, biomass and coverage of vegetation which determine the magnitudes and variations of N 2 O at spatial scale (Allen et al, 2007;Hirota et al, 2007;Welti et al, 2012). Similarly, annual pattern in N 2 O net emission were found to vary strongly among four different ecosystems located within one site.…”

Section: Discussionmentioning

confidence: 99%

Seasonal dynamics in nitrous oxide emissions under different types of vegetation in saline-alkaline soils of the Yellow River Delta, China and implications for eco-restoring coastal wetland

Zhang

Song

Zhang

et al. 2013

Ecological Engineering

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a b s t r a c tSalt-affected soils are extensively present and constitute about 7% of total land surface. However, our knowledge about nitrous oxide (N 2 O) production through rapid nitrification and denitrification processes between the atmosphere and the saline soil is very limited. In order to evaluate the potential of N 2 O consumption in saline soils, this study was therefore designed to quantify the variability in N 2 O emissions monthly in the Yellow River Delta in China. Main issues include: different saline-alkaline soils and temporal aspects. Our aim was to quantify N 2 O emissions and identify the major drivers controlling its emissions for providing guidance in eco-restoring coastal wetland on large scale. By using in situ closed chambers the annual average emissions of N 2 O from the mudflat was determined and it was significantly higher than plant communities, especially herbage communities. In general, the emissions of N 2 O of different ecosystems showed a unique-peak annual pattern, with the peak in September. Saline-alkaline mudflat and different vegetations acted as N 2 O source in the Yellow River Delta and the N 2 O emission of different ecosystems followed the order: Saline-alkaline mudflat > T. chinensis >S. salsa > P. australis. Therefore restoration of saline land through revegetation was necessary to reduce the N 2 O emission of saline soils. The effects of air and soil temperature on N 2 O fluxes were significant in salt-affected soils except P. australis. Soil water content and electrical conductivity correlated positively or negatively with N 2 O emissions in mudflat and P. australis community. While relationships between N 2 O production and other soil properties (TC, TN, C:N ratio, NH 4 + -N and NO 3 − -N) were only significant in mudflat and T. chinensis community. Temporal variations of N 2 O emission were related to the interactions of abiotic factors (air and soil temperature, soil water content and electrical conductivity) and the variations of other soil properties, while spatial variations were mainly affected by the vegetation composition at spatial scale.

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“…In three of the studies, both light and dark measurements were made, allowing a day length-integrated rate to be calculated for a 24-h period. We used the day length-integrated rate reported by Van der Nat and Middelburg (2000) in our analysis, and calculated such a rate from data reported by Hirota et al (2007) and Wang et al (2009) (Table 1).…”

Section: Methodsmentioning

confidence: 99%

“…However, the sample size of the oligohaline class was also the smallest at five replicates. Removing one oligohaline site with very high emissions, measured over just three days in August (Hirota et al 2007), changed the result of the analysis such that the only significant difference overall was between polyhaline and non-polyhaline systems. The highest variability coincided with the highest emissions in the salinity range of 0-5 (Table 2).…”

Section: Methane Emissions Versus Salinitymentioning

confidence: 99%

Salinity Influence on Methane Emissions from Tidal Marshes

2011

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The relationship between methane emissions and salinity is not well understood in tidal marshes, leading to uncertainty about the net effect of marsh conservation and restoration on greenhouse gas balance. We used published and unpublished field data to investigate the relationships between tidal marsh methane emissions, salinity, and porewater concentrations of methane and sulfate, then used these relationships to consider the balance between methane emissions and soil carbon sequestration. Polyhaline tidal marshes (salinity >18) had significantly lower methane emissions (mean ± sd=1±2 gm −2 yr −1) than other marshes, and can be expected to decrease radiative forcing when created or restored. There was no significant difference in methane emissions from fresh (salinity=0-0.5) and mesohaline (5-18) marshes (42±76 and 16±11 gm −2 yr −1, respectively), while oligohaline (0.5-5) marshes had the highest and most variable methane emissions (150±221 gm −2 yr −1). Annual methane emissions were modeled using a linear fit of salinity against log-transformed methane flux ( logðCH 4 Þ ¼ À0:056 Â salinity þ 1:38; r 2 = 0 . 5 2 ; p < 0.0001). Managers interested in using marshes as greenhouse gas sinks can assume negligible methane emissions in polyhaline systems, but need to estimate or monitor methane emissions in lower-salinity marshes.

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Fluxes of carbon dioxide, methane and nitrous oxide in two contrastive fringing zones of coastal lagoon, Lake Nakaumi, Japan

Cited by 136 publications

References 25 publications

High methane emissions from a littoral zone on the Qinghai-Tibetan Plateau

High methane emissions from a littoral zone on the Qinghai-Tibetan Plateau

Seasonal dynamics in nitrous oxide emissions under different types of vegetation in saline-alkaline soils of the Yellow River Delta, China and implications for eco-restoring coastal wetland

Salinity Influence on Methane Emissions from Tidal Marshes

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