Temperature controls organic carbon sequestration in a subarctic lake
Rantala, M. V., Luoto, T., & Nevalainen, L. (2016). Temperature controls organic carbon sequestration in a subarctic lake. Scientific Reports, 6, 34780. https://doi.org/10.1038/srep34780
Julkaistu sarjassaScientific Reports
© the Authors, 2016. This is an open access article published by Nature and distributed under the terms of a Creative Commons Attribution 4.0 International License.
Widespread ecological reorganizations and increases in organic carbon (OC) in lakes across the Northern Hemisphere have raised concerns about the impact of the ongoing climate warming on aquatic ecosystems and carbon cycling. We employed diverse biogeochemical techniques on a highresolution sediment record from a subarctic lake in northern Finland (70°N) to examine the direction, magnitude and mechanism of change in aquatic carbon pools prior to and under the anthropogenic warming. Coupled variation in the elemental and isotopic composition of the sediment and a proxybased summer air temperature reconstruction tracked changes in aquatic production, depicting a decline during a cool climate interval between ~1700–1900 C.E. and a subsequent increase over the 20th century. OC accumulation rates displayed similar coeval variation with temperature, mirroring both changes in aquatic production and terrestrial carbon export. Increase in sediment organic content over the 20th century together with high inferred aquatic UV exposure imply that the 20th century increase in OC accumulation is primarily connected to elevated lake production rather than terrestrial inputs. The changes in the supply of autochthonous energy sources were further reflected higher up the benthic food web, as evidenced by biotic stable isotopic fingerprints. ...
JulkaisijaNature Publishing Group
MetadataNäytä kaikki kuvailutiedot
Näytetään aineistoja, joilla on samankaltainen nimeke tai asiasanat.
Kivilä, Henriikka; Luoto, Tomi P.; Rantala, Marttiina V.; Kiljunen, Mikko; Rautio, Milla; Nevalainen, Liisa (Wiley-Blackwell Publishing Ltd., 2019)Climate warming and consequent greening of subarctic landscapes increase the availability of organic carbon to the detrital food webs in aquatic ecosystems. This may cause important shifts in ecosystem functioning through ...
Allochthonous carbon is a major regulator to bacterial growth and community composition in subarctic freshwaters Roiha, Toni; Peura, Sari; Cusson, Mathieu; Rautio, Milla (Nature Publishing Group, 2016)In the subarctic region, climate warming and permafrost thaw are leading to emergence of ponds and to an increase in mobility of catchment carbon. As carbon of terrestrial origin is increasing in subarctic freshwaters ...
The influence of lipid content and taxonomic affiliation on methane and carbon dioxide production from phytoplankton biomass in lake sediment Hiltunen, Minna; Nykänen, Hannu; Syväranta, Jari (John Wiley & Sons, 2021)The greenhouse gases methane (CH4) and carbon dioxide (CO2) are end products of microbial anaerobic degradation of organic matter (OM) in lake sediments. Although previous research has shown that phytoplankton lipid content ...
Buck, Moritz; Garcia, Sarahi L.; Fernandez, Leyden; Martin, Gaëtan; Martinez-Rodriguez, Gustavo A.; Saarenheimo, Jatta; Zopfi, Jakob; Bertilsson, Stefan; Peura, Sari (Nature Publishing Group, 2021)Stratified lakes and ponds featuring steep oxygen gradients are significant net sources of greenhouse gases and hotspots in the carbon cycle. Despite their significant biogeochemical roles, the microbial communities, ...
Roiha, Toni (University of Jyväskylä, 2015)