Connecting silvan and lacustrine ecosystems: transport of carbon from forests to adjacent water bodies

Rasilo, Terhi

doi:10.14214/df.155

Cited by 2 publications

(2 citation statements)

References 152 publications

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“…Since we did not find soil-derived C in plant leaves, direct uptake of soil C sources (inorganic or organic) by roots may have occurred in both plant-mycorrhizal species assemblages. Inorganic C in soils can be taken up by plants either in gaseous form (CO 2 and CH 4 ) from soil air, for example, via dark fixation or in dissolved form in soil solution, , but the importance of this process has been unclear so far and is known to be highly variable between plant species . Also, organic forms of C from soil components may be taken up by roots …”

Section: Discussionmentioning

confidence: 99%

Uptake of Soil-Derived Carbon into Plants: Implications for Disposal of Nuclear Waste

Majlesi

Juutilainen

Kasurinen

et al. 2019

Environ. Sci. Technol.

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Radiocarbon ( 14 C) is potentially significant in terms of release from deep geological disposal of radioactive waste and incorporation into the biosphere. In this study we investigated the transfer of soil-derived C into two plant species by using a novel approach, where the uptake of soil-derived C into newly cultivated plants was studied on 8000-year leftover peat in order to distinguish between soil-derived and atmospheric C. Two-pool isotope mixing model was used to reveal the fraction of soil C in plants. Our results indicated that although the majority of plant C was obtained from atmosphere by photosynthesis, a significant portion (up to 3−5%) of C in plant roots was derived from old soil. We found that uptake of soil C into roots was more pronounced in ectomycorrhizal Scots pine than in endomycorrhizal reed canary grass, but nonetheless, both species showed soil-derived C uptake in their roots. Although plenty of soil-derived C was available in canopy air for reassimilation by photosynthesis, no trace of soil-derived C was detected in aboveground parts, possibly due to the open canopy. The results suggest that the potential for contamination with 14 C is higher for roots than for leaves.

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Section: Discussionmentioning

confidence: 99%

Uptake of Soil-Derived Carbon into Plants: Implications for Disposal of Nuclear Waste

Majlesi

Juutilainen

Kasurinen

et al. 2019

Environ. Sci. Technol.

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“…Surface waters, i.e. streams or overland flow, transport a significant amount of terrestrial C from the catchment areas to lakes, which can result in a 6-50% decrease of net ecosystem exchange in forested and peatland catchments, respectively (Dinsmore et al 2010;Huotari et al 2011;Jonsson et al 2007;Rasilo 2013). Further, organic C of terrestrial origin contributes to 30-80% of the C released from lakes to the atmosphere (Algesten et al 2003;Jonsson et al 2007).…”

Section: Introductionmentioning

confidence: 99%

Carbon dynamics in a Boreal land-stream-lake continuum during the spring freshet of two hydrologically contrasting years

et al. 2020

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We studied in 2013 and 2014 the spring carbon dynamics in a Boreal landscape consisting of a lake and 15 inflowing streams and an outlet. The first year had weather and a hydrological regime typical of past years with a distinct spring freshet connected with the thaw of the average snowpack. The latter year had higher air temperatures which did not permit snow accumulation, despite similar winter precipitation. As such, there was hardly any spring freshet in 2014, and stream discharge peaked in January, i.e., the conditions resembled those predicted in the future climate. Despite the hydrological differences between the years, there were only small interannual differences in the stream CO 2 and DOC concentrations. The relationship between the concentrations and discharge was stronger in the typical year. CO 2 concentrations in medium-sized streams correlated negatively with the discharge, indicating dilution effect of melting

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Connecting silvan and lacustrine ecosystems: transport of carbon from forests to adjacent water bodies

Cited by 2 publications

References 152 publications

Uptake of Soil-Derived Carbon into Plants: Implications for Disposal of Nuclear Waste

Uptake of Soil-Derived Carbon into Plants: Implications for Disposal of Nuclear Waste

Carbon dynamics in a Boreal land-stream-lake continuum during the spring freshet of two hydrologically contrasting years

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