Research output: Contribution to journal › Article › peer-review
Environmental and taxonomic controls of carbon and oxygen stable isotope composition in Sphagnum across broad climatic and geographic ranges. / Granath, Gustaf; Rydin, Håkan; Baltzer, Jennifer L.; Bengtsson, Fia; Boncek, Nicholas; Bragazza, Luca; Bu, Zhao Jun; Caporn, Simon J.M.; Dorrepaal, Ellen; Galanina, Olga; GaÅka, Mariusz; Ganeva, Anna; Gillikin, David P.; Goia, Irina; Goncharova, Nadezhda; Hájek, Michal; Haraguchi, Akira; Harris, Lorna I.; Humphreys, Elyn; Jiroušek, Martin; KajukaÅo, Katarzyna; Karofeld, Edgar; Koronatova, Natalia G.; Kosykh, Natalia P.; Lamentowicz, Mariusz; Lapshina, Elena; Limpens, Juul; Linkosalmi, Maiju; Ma, Jin Ze; Mauritz, Marguerite; Munir, Tariq M.; Natali, Susan M.; Natcheva, Rayna; Noskova, Maria; Payne, Richard J.; Pilkington, Kyle; Robinson, Sean; Robroek, Bjorn J.M.; Rochefort, Line; Singer, David; Stenøien, Hans K.; Tuittila, Eeva Stiina; Vellak, Kai; Verheyden, Anouk; Michael Waddington, James; Rice, Steven K.
In: Biogeosciences, Vol. 15, No. 16, 29.08.2018, p. 5189-5202.Research output: Contribution to journal › Article › peer-review
}
TY - JOUR
T1 - Environmental and taxonomic controls of carbon and oxygen stable isotope composition in Sphagnum across broad climatic and geographic ranges
AU - Granath, Gustaf
AU - Rydin, Håkan
AU - Baltzer, Jennifer L.
AU - Bengtsson, Fia
AU - Boncek, Nicholas
AU - Bragazza, Luca
AU - Bu, Zhao Jun
AU - Caporn, Simon J.M.
AU - Dorrepaal, Ellen
AU - Galanina, Olga
AU - GaÅka, Mariusz
AU - Ganeva, Anna
AU - Gillikin, David P.
AU - Goia, Irina
AU - Goncharova, Nadezhda
AU - Hájek, Michal
AU - Haraguchi, Akira
AU - Harris, Lorna I.
AU - Humphreys, Elyn
AU - Jiroušek, Martin
AU - KajukaÅo, Katarzyna
AU - Karofeld, Edgar
AU - Koronatova, Natalia G.
AU - Kosykh, Natalia P.
AU - Lamentowicz, Mariusz
AU - Lapshina, Elena
AU - Limpens, Juul
AU - Linkosalmi, Maiju
AU - Ma, Jin Ze
AU - Mauritz, Marguerite
AU - Munir, Tariq M.
AU - Natali, Susan M.
AU - Natcheva, Rayna
AU - Noskova, Maria
AU - Payne, Richard J.
AU - Pilkington, Kyle
AU - Robinson, Sean
AU - Robroek, Bjorn J.M.
AU - Rochefort, Line
AU - Singer, David
AU - Stenøien, Hans K.
AU - Tuittila, Eeva Stiina
AU - Vellak, Kai
AU - Verheyden, Anouk
AU - Michael Waddington, James
AU - Rice, Steven K.
PY - 2018/8/29
Y1 - 2018/8/29
N2 - Rain-fed peatlands are dominated by peat mosses (Sphagnum sp.), which for their growth depend on nutrients, water and CO 2 uptake from the atmosphere. As the isotopic composition of carbon (12,13C) and oxygen (16,18O) of these Sphagnum mosses are affected by environmental conditions, Sphagnum tissue accumulated in peat constitutes a potential long-term archive that can be used for climate reconstruction. However, there is inadequate understanding of how isotope values are influenced by environmental conditions, which restricts their current use as environmental and palaeoenvironmental indicators. Here we tested (i) to what extent C and O isotopic variation in living tissue of Sphagnum is species-specific and associated with local hydrological gradients, climatic gradients (evapotranspiration, temperature, precipitation) and elevation; (ii) whether the C isotopic signature can be a proxy for net primary productivity (NPP) of Sphagnum; and (iii) to what extent Sphagnum tissue δ 18O tracks the δ 18O isotope signature of precipitation. In total, we analysed 337 samples from 93 sites across North America and Eurasia using two important peat-forming Sphagnum species (S. magellanicum, S. fuscum) common to the Holarctic realm. There were differences in δ 13C values between species. For S. magellanicum δ 13C decreased with increasing height above the water table (HWT, R 2 =17%) and was positively correlated to productivity (R 2 = 7%). Together these two variables explained 46% of the between-site variation in δ 13C values. For S. fuscum, productivity was the only significant predictor of δ 13C but had low explanatory power (total R 2 = 6%). For δ 18O values, approximately 90% of the variation was found between sites. Globally modelled annual δ 18O values in precipitation explained 69% of the between-site variation in tissue δ 18O. S. magellanicum showed lower δ 18O enrichment than S. fuscum (-0.83 ‰ lower). Elevation and climatic variables were weak predictors of tissue δ 18O values after controlling for δ 18O values of the precipitation. To summarize, our study provides evidence for (a) good predictability of tissue δ 18O values from modelled annual δ 18O values in precipitation, and (b) the possibility of relating tissue δ 13C values to HWT and NPP, but this appears to be species-dependent. These results suggest that isotope composition can be used on a large scale for climatic reconstructions but that such models should be species-specific.
AB - Rain-fed peatlands are dominated by peat mosses (Sphagnum sp.), which for their growth depend on nutrients, water and CO 2 uptake from the atmosphere. As the isotopic composition of carbon (12,13C) and oxygen (16,18O) of these Sphagnum mosses are affected by environmental conditions, Sphagnum tissue accumulated in peat constitutes a potential long-term archive that can be used for climate reconstruction. However, there is inadequate understanding of how isotope values are influenced by environmental conditions, which restricts their current use as environmental and palaeoenvironmental indicators. Here we tested (i) to what extent C and O isotopic variation in living tissue of Sphagnum is species-specific and associated with local hydrological gradients, climatic gradients (evapotranspiration, temperature, precipitation) and elevation; (ii) whether the C isotopic signature can be a proxy for net primary productivity (NPP) of Sphagnum; and (iii) to what extent Sphagnum tissue δ 18O tracks the δ 18O isotope signature of precipitation. In total, we analysed 337 samples from 93 sites across North America and Eurasia using two important peat-forming Sphagnum species (S. magellanicum, S. fuscum) common to the Holarctic realm. There were differences in δ 13C values between species. For S. magellanicum δ 13C decreased with increasing height above the water table (HWT, R 2 =17%) and was positively correlated to productivity (R 2 = 7%). Together these two variables explained 46% of the between-site variation in δ 13C values. For S. fuscum, productivity was the only significant predictor of δ 13C but had low explanatory power (total R 2 = 6%). For δ 18O values, approximately 90% of the variation was found between sites. Globally modelled annual δ 18O values in precipitation explained 69% of the between-site variation in tissue δ 18O. S. magellanicum showed lower δ 18O enrichment than S. fuscum (-0.83 ‰ lower). Elevation and climatic variables were weak predictors of tissue δ 18O values after controlling for δ 18O values of the precipitation. To summarize, our study provides evidence for (a) good predictability of tissue δ 18O values from modelled annual δ 18O values in precipitation, and (b) the possibility of relating tissue δ 13C values to HWT and NPP, but this appears to be species-dependent. These results suggest that isotope composition can be used on a large scale for climatic reconstructions but that such models should be species-specific.
UR - http://www.scopus.com/inward/record.url?scp=85052703996&partnerID=8YFLogxK
U2 - 10.5194/bg-15-5189-2018
DO - 10.5194/bg-15-5189-2018
M3 - Article
AN - SCOPUS:85052703996
VL - 15
SP - 5189
EP - 5202
JO - Biogeosciences
JF - Biogeosciences
SN - 1726-4170
IS - 16
ER -
ID: 17653033