Research article - Peer-reviewed, 2019
Climate-induced changes in carbon flows across the plant-consumer interface in a small subarctic lake
Belle, Simon; Nilsson, Jenny L.; Tonno, Ilmar; Freiberg, Rene; Vrede, Tobias; Goedkoop, WillemAbstract
Reconstructions of past food web dynamics are necessary for better understanding long-term impacts of climate change on subarctic lakes. We studied elemental and stable isotopic composition of sedimentary organic matter, photosynthetic pigments and carbon stable isotopic composition of Daphnia (Cladocera; Crustacea) resting eggs (delta C-13(Clado)) in a sediment record from a small subarctic lake. We examined how regional climate and landscape changes over the last 5800 years affected the relative importance of allochthonous and autochthonous carbon transfer to zooplankton. Overall, delta C-13(Clado) values were well in line with the range of theoretical values of aquatic primary producers, confirming that zooplankton consumers in subarctic lakes, even in the long-term perspective, are mainly fuelled by autochthonous primary production. Results also revealed greater incorporations of benthic algae into zooplankton biomass in periods that had a warmer and drier climate and clearer water, whereas a colder and wetter climate and lower water transparency induced higher contributions of planktonic algae to Daphnia biomass. This study thus emphasizes long-term influence of terrestrial-aquatic linkages and in-lake processes on the functioning of subarctic lake food webs.Published in
Scientific Reports2019, volume: 9, article number: 17087
Publisher: NATURE PUBLISHING GROUP
Authors' information
Swedish University of Agricultural Sciences, Department of Aquatic Sciences and Assessment
Swedish University of Agricultural Sciences, Department of Aquatic Sciences and Assessment
Tonno, Ilmar
Estonian University of Life Sciences
Freiberg, Rene
Estonian University of Life Sciences
Swedish University of Agricultural Sciences, Department of Aquatic Sciences and Assessment
Swedish University of Agricultural Sciences, Department of Aquatic Sciences and Assessment
Sustainable Development Goals
SDG13 Climate action
UKÄ Subject classification
Oceanography, Hydrology, Water Resources
Publication Identifiers
DOI: https://doi.org/10.1038/s41598-019-53541-3
URI (permanent link to this page)
https://res.slu.se/id/publ/102928