Methane efflux from littoral vegetation stands of southern boreal lakes: An upscaled regional estimate

Bergström, Irina; Mäkelä, Suvi; Kankaala, Paula; Kortelainen, Pirkko

doi:10.1016/j.atmosenv.2006.08.014

Cited by 83 publications

(99 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The 12 study lakes are located in this landscape area, where the total number of lakes is 619. Their area is 245 km 2 (mean 6 standard deviation 0.40 6 3.03, median 0.008 km 2 ), which is 15% of the landscape area (Statistics of Finnish Environment Institute; Bergströ m et al 2007). The chemical properties of the 12 study lakes (Table 2) correspond well to those in the whole study region (Mä kelä et al 2004, Finnish Environment Institute, OIVA service on environmental and geographic information).…”

Section: Lakementioning

confidence: 99%

“…The studied lakes are located in this region of 1600 km 2 , of which 15% is covered by lakes. The upscaled estimate of the CH 4 efflux includes the vegetated littoral areas of the lakes (Bergströ m et al 2007). We hypothesized that (1) area-related water column stability and mixing (i.e., physical forcing during the icefree period) significantly influences the concentrations and fluxes of CO 2 and CH 4 ; (2) terrestrial organic carbon plays a significant role in CO 2 and CH 4 supersaturation of the lakes; and (3) at the landscape scale, the effluxes of CO 2 and CH 4 from small lakes (, 1 km 2 ) exceed those from large lakes.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Lake‐size dependent physical forcing drives carbon dioxide and methane effluxes from lakes in a boreal landscape

Kankaala

Huotari

Tulonen

et al. 2013

Limnology & Oceanography

Self Cite

View full text Add to dashboard Cite

We studied the concentrations and diffusive fluxes of carbon dioxide (CO 2 ) and methane (CH 4 ) in 12 lakes in a size range of 0.004-35 km 2 and mean total organic carbon (TOC) range of 6-25 mg L 21 , located in the southern boreal area of Finland. TOC, mainly originating from the catchment, was the best predictor of concentrations and areal CO 2 effluxes in the whole lake-area range, but among the lakes with an area , 1 km 2 having an anoxic hypolimnion during summer, the areal effluxes were also related to lake size and an index of turbulence. The concentration and areal effluxes of CH 4 from the lakes' pelagic zones were related more closely to lake-sizerelated water column stability and turbulent mixing than directly to TOC. The total regional flux estimate from 619 lakes in the region of 1600 km 2 showed that seven lakes with an area of 10-50 km 2 were responsible for 57-69% of the pelagic CO 2 effluxes and about half of the sum of pelagic and littoral CH 4 effluxes from the lakes. The proportion accounted for by the small lakes (area , 1 km 2 ) in the gas effluxes was 1.4-2.1 times higher, 18-26% for CO 2 and 21-26% for CH 4 , than their areal proportion (12.5%) in the landscape, although numerically these small lakes predominate in the whole lake population (96%).Most inland waters worldwide have been shown to be supersaturated with the greenhouse gases (GHG) carbon dioxide (CO 2 ) and methane (CH 4 ), and thus release these gases to the atmosphere (Cole et al. 1994;Bastviken et al. 2004). The GHG supersaturation indicates that freshwater ecosystems play an important role in the global carbon cycle by mineralizing and/or accumulating terrestrial organic carbon (Tranvik et al. 2009). By applying Pareto distribution analysis, Downing et al. (2006) estimated that . 99% of the world's lakes have an area , 1 km 2 and these small lakes form , 43% of the global lake area. Thus, in many recent analyses of lake-rich landscapes, the role of small lakes has received much attention, because the small headwater lakes are more typically characterized by higher concentrations of allochthonous organic carbon than the larger lowland lakes (Xenopoulos et al. 2003;Hanson et al. 2007;Einola et al. 2011). In the boreal region, high fluxes of total organic carbon (TOC), originating mainly from peatland and forested catchments (Kortelainen 1993;Humborg et al. 2010), are among the most important factors contributing to CO 2 supersaturation and oxygen consumption in the lake water columns and sediments (Salonen et al. 1983;Larsen et al. 2011). As a result of anaerobic decomposition of organic matter, high concentrations of CH 4 are typical in eutrophic lakes with an anoxic hypolimnion but also in sheltered forest lakes, which likewise develop marked and prolonged hypolimnetic anoxia. It has been suggested that spring and fall mixing periods are generally the periods of the greatest effluxes of GHG into the atmosphere. However, rainy periods may also be followed by efflux peaks , and thus precipitation influences the inte...

show abstract

Section: Lakementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Lake‐size dependent physical forcing drives carbon dioxide and methane effluxes from lakes in a boreal landscape

Kankaala

Huotari

Tulonen

et al. 2013

Limnology & Oceanography

Self Cite

View full text Add to dashboard Cite

show abstract

“…There are many references based on vegetation types to estimate methane flux in different ecosystems all over the world (Rinnan et al 2003;Nilsson et al 2001;Kettunen 2003;Hirota et al 2004;Crozier and DeLaune 1996;Bubier 1995;Bergstrom et al 2007). Some studies also attempted to estimate methane flux based on soil types (Sommer and Fiedler 2002).…”

Section: Vegetation Types and Methane Flux On The Ecosystem Scalementioning

confidence: 99%

Methane Fluxes from Alpine Wetlands of Zoige Plateau in Relation to Water Regime and Vegetation under Two Scales

Chen

Wang

et al. 2010

Water Air Soil Pollut

View full text Add to dashboard Cite

show abstract

“…Among them wetlands are considered the most important source. However, recent studies on CH 4 effluxes from littoral wetlands, mainly of boreal lakes (Juutinen et al, 2001;Kankaala et al, 2004;Duan et al, 2005;Wang et al, 2006;Bergstrom et al, 2007) suggest that the importance of the littoral zones of the lakes as one of the major natural sources of atmospheric CH 4 may have been underestimated. Therefore, we need more researches on the littoral zones of lakes to get more accurate estimate of CH 4 effluxes.…”

Section: Introductionmentioning

confidence: 99%

“…(Juutinen et al, 2003;Wang et al, 2006;Bergstrom et al, 2007). In vegetated littoral areas, plants also play a very important role in the three aspects of CH 4 fluxes, i.e., providing the conduit for methane transportation, supplying substrates for methanogens through root exudation and delivering O 2 to oxidize methane (Dacey and Klug, 1979;Schü tz et al, 1991).…”

Section: Introductionmentioning

confidence: 99%

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

Chen

Yao

et al. 2009

Atmospheric Environment

View full text Add to dashboard Cite

Methane efflux from littoral vegetation stands of southern boreal lakes: An upscaled regional estimate

Cited by 83 publications

References 31 publications

Lake‐size dependent physical forcing drives carbon dioxide and methane effluxes from lakes in a boreal landscape

Lake‐size dependent physical forcing drives carbon dioxide and methane effluxes from lakes in a boreal landscape

Methane Fluxes from Alpine Wetlands of Zoige Plateau in Relation to Water Regime and Vegetation under Two Scales

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

Contact Info

Product

Resources

About