Methane emissions from a boreal meso-eutrophic lake: an assessment of seasonal and diel variation among emergent vegetation

Ojala, Anne; Käki, Tiina; Huttunen, Jari T.

doi:10.1080/03680770.1998.11901470

Cited by 4 publications

(4 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…On the basis of the point-measured CH 4 flux and the area occupied by each zone, the CH 4 emission from Wuliangsu Lake was roughly estimated to be 1207.44 t CH 4 from April to November and 84.86% of the emissions were from P. australis community. Compared with the results from reed community at other sites, the flux obtained by this study was higher than that from a boreal mesoeutrophic lake (Ojala et al, 2000), similar to that from a middle-latitude marsh in North America (Kim et al, 1998). Two different gas transport mechanisms, molecular diffusion and convective throughflow, are used in different kinds of emergent plants.…”

Section: The Role Of Vegetation In the Control Of Ch 4 Emissionsmentioning

confidence: 71%

“…Two different gas transport mechanisms, molecular diffusion and convective throughflow, are used in different kinds of emergent plants. In this study, CH 4 flux from Phragmites and Typha, which were suggested to be based mostly on convective gas transport (Ojala et al, 2000), was higher than the emissions from S. lacustris based on molecular diffusion (Van der Nat et al, 1998). In general, CH 4 emission rates based on transport mechanism were higher comparable to when CH 4 transport is based on molecular diffusion Sorrell and Boon, 1994;Whiting and Chanton, 1996).…”

Section: The Role Of Vegetation In the Control Of Ch 4 Emissionsmentioning

confidence: 92%

See 1 more Smart Citation

Seasonal and diurnal variations in methane emissions from Wuliangsu Lake in arid regions of China

Duan

Wang

et al. 2005

Atmospheric Environment

View full text Add to dashboard Cite

Section: The Role Of Vegetation In the Control Of Ch 4 Emissionsmentioning

confidence: 71%

Section: The Role Of Vegetation In the Control Of Ch 4 Emissionsmentioning

confidence: 92%

Seasonal and diurnal variations in methane emissions from Wuliangsu Lake in arid regions of China

Duan

Wang

et al. 2005

Atmospheric Environment

View full text Add to dashboard Cite

“…Methane that did not reach the water surface may be oxidized or might have been accumulated into sediments (Chanton et al ., 1989; van der Nat & Middelburg, 2000). The moderate (0.5 mmol m −2 h −1 ) efflux in October of the wet year, was slightly higher than those reported in other lake littoral stands in Finland (Hyvönen et al ., 1998; Ojala et al ., 2000). However, bubbling was not detected in this study in spite of the frequent measurements suggesting that there was not great accumulation of CH 4 .…”

Section: Discussionmentioning

confidence: 99%

Methane (CH₄) release from littoral wetlands of Boreal lakes during an extended flooding period

Juutinen

Alm

Larmola

et al. 2003

Global Change Biology

View full text Add to dashboard Cite

Lake littoral zones have a transitional nature and dynamic conditions, which are reflected in their CH4 emissions. Thus, detailed studies are needed to assess the littoral CH4 emissions in a regional scale. In this study, CH4 fluxes were followed during the ice‐free seasons in 1998 and 1999 by using the static chamber method in the littoral zone of two lakes in Finland. An exceptionally high water level in 1998 caused an unusually long inundation in otherwise ephemerally flooded zone. The flooding was normal in year 1999. The factors controlling CH4 emissions were examined and statistical response functions were constructed. Further, the effect of extended flooding on the littoral CH4 budged was estimated. The methane flux was primarily regulated by the water level in grass and sedge dominated eulittoral zone, but not in infralittoral reed and water lily stands. Methane emissions in the sedge dominated zone decreased significantly, when the flood was high enough to submerge the venting structures of the plants. Besides water level, sediment temperature determined CH4 emission. The cumulative CH4 emissions from the whole littoral wetlands in wet year were 1.1 times (L. Kevätön), or 0.61 and 0.79 times (L. Mekrijärvi) those in dry year. The crucial factor was the discrepancy between the exceptional and the average water level. The extension of inundated area does not necessarily increase CH4 emissions if the flood reaches infrequently inundated areas, which apparently have low CH4 production potential. This is the case especially, if the emissions in lower zones simultaneously decrease due to high water level. Our study analyses these complex responses between CH4 emissions and water level.

show abstract

“…Littoral areas contribute as much as 70% of the total CH 4 emissions from lakes (Juutinen et al, 2003a;Bastviken et al, 2008). Methane emissions from littoral wetlands are primarily regulated by water level, and these emissions have high seasonal variation (Ojala et al, 2000;Juutinen et al, 2003b;Liikanen et al, 2003). In addition to hydrology (Siljanen et al, 2011), temperature can affect (either directly or through the availability of CH 4 ) CH 4 oxidation activity and the composition of the methanotrophic community (Mohanty et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

Seasonal variation in the function and diversity of methanotrophs in the littoral wetland of a boreal eutrophic lake

Siljanen¹,

Saari

Bodrossy

et al. 2012

FEMS Microbiol Ecol

View full text Add to dashboard Cite

Littoral wetlands are responsible for most of the total methane (CH(4) ) emissions from lake ecosystems. We show that seasonally variable hydrological and temperature conditions in the littoral wetland of a eutrophic boreal lake affect the community composition and gene transcription of methanotrophs measured by a particulate methane monooxygenase (pmoA) gene-targeted microarray. Type Ib freshwater-cluster methanotrophs were favoured by the high water level, and CH(4) oxidation was positively correlated with their pmoA gene transcripts. In the dry subsite of the wetland, the more stagnant hydrological conditions in summer and autumn induced the dominance of type II methanotrophs over type I methanotrophs (community composition and pmoA gene transcripts). The relative abundance of type II methanotrophs increased in winter. The results provide new insight into the variation of methanotroph communities across seasons in littoral wetlands.

show abstract

Methane emissions from a boreal meso-eutrophic lake: an assessment of seasonal and diel variation among emergent vegetation

Cited by 4 publications

References 9 publications

Seasonal and diurnal variations in methane emissions from Wuliangsu Lake in arid regions of China

Seasonal and diurnal variations in methane emissions from Wuliangsu Lake in arid regions of China

Methane (CH₄) release from littoral wetlands of Boreal lakes during an extended flooding period

Seasonal variation in the function and diversity of methanotrophs in the littoral wetland of a boreal eutrophic lake

Contact Info

Product

Resources

About

Methane emissions from a boreal meso-eutrophic lake: an assessment of seasonal and diel variation among emergent vegetation

Cited by 4 publications

References 9 publications

Seasonal and diurnal variations in methane emissions from Wuliangsu Lake in arid regions of China

Seasonal and diurnal variations in methane emissions from Wuliangsu Lake in arid regions of China

Methane (CH4) release from littoral wetlands of Boreal lakes during an extended flooding period

Seasonal variation in the function and diversity of methanotrophs in the littoral wetland of a boreal eutrophic lake

Contact Info

Product

Resources

About

Methane (CH₄) release from littoral wetlands of Boreal lakes during an extended flooding period