Abstract
Being both stable carbon sinks and greenhouse gas sources, boreal lake sediments represent significant players in carbon (C) cycling. The release of dissolved organic carbon (DOC) into anoxic water is a widespread phenomenon in boreal lakes with impact on sediment C budgets. The association of OC with iron (Fe) is assumed to play an important role for this anoxic OC release via the dissimilatory reduction of Fe, but also to influence the stabilization of OC in sediments. To investigate the role of Fe–OC association for OC dynamics in different boreal lake sediments, we compared the content of Fe-bound OC [Fe–OC, defined as citrate bicarbonate dithionite (CBD) extractable OC] and the extent of reductive dissolution of solid-phase Fe and OC at anoxia. We found high among-lake variability in Fe–OC content, and while the amount of Fe–OC was high in three of the lakes (980–1920 µmol g−1), the overall contribution of Fe–OC to the sediment OC pool in all study lakes was not higher than 11%. No linkages between the amount of the Fe–OC pool and lake or sediment characteristics (e.g., pH, DOC concentration, sediment OC content, C:N ratio) could be identified. The observed release of OC from anoxic sediment may be derived from dissolution of Fe–OC in the lake sediments with high Fe–OC, but in other lake sediments, OC release during anoxia exceeded the sediment Fe–OC pool, indicating low contribution of reductive Fe dissolution to OC release from these lake sediments. The range of the investigated boreal lakes reflects the high variability in the size of the sediment Fe–OC pool (0–1920 µmol g−1) and CBD-extractable Fe (123–4050 µmol g−1), which was not mirrored in the extent of reductive dissolution of Fe (18.9–84.6 µmol g−1) and OC (1080–1700 µmol g−1) during anoxia, suggesting that Fe-bound OC may play a minor role for sediment OC release in boreal lakes. However, studies of redox-related OC cycling in boreal lake sediments should consider that the amount of Fe–OC can be high in some lakes.
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References
Agstam O (2015) The influence of pH and dissolved organic carbon (DOC) concentration on anoxia induced diffusive flux of DOC and iron from sediments in four different Swedish lakes. Uppsala University
Andersson UB (2004) The Bastnäs-type REE-mineralisations in north-western Bergslagen, Sweden. SGU Rapp Medd 119(1):34
Bastviken D, Persson L, Odham G, Tranvik LJ (2004) Degradation of dissolved organic matter in oxic and anoxic lake water. Limnol Oceanogr 49:109–116
Bastviken D, Tranvik LJ, Downing JA, Crill PM, Enrich-Prast A (2011) Freshwater methane emissions offset the continental carbon sink. Science 331:50–50
Boudot J (1989) Biodegradation of synthetic organo-metallic complexes of iron and aluminium with selected metal to carbon ratios. Soil Biol Biochem 21:961–966
Boye K, Noël V, Tfaily MM, Bone SE, Williams KH, Bargar JR, Fendorf S (2017) Thermodynamically controlled preservation of organic carbon in floodplains. Nat Geosci. https://doi.org/10.1038/ngeo2940
Brothers S et al (2014) A feedback loop links brownification and anoxia in a temperate, shallow lake. Limnol Oceanogr 59:1388–1398
Buettner SW, Kramer MG, Chadwick OA, Thompson A (2014) Mobilization of colloidal carbon during iron reduction in basaltic soils. Geoderma 221:139–145
Chadwick SP, Babiarz CL, Hurley JP, Armstrong DE (2006) Influences of iron, manganese, and dissolved organic carbon on the hypolimnetic cycling of amended mercury. Sci Total Environ 368:177–188
Chin Y-P, Traina SJ, Swank CR, Backhus D (1998) Abundance and properties of dissolved organic matter in pore waters of a freshwater wetland. Limnol Oceanogr 43:1287–1296
Chmiel HE (2015) The role of sediments in the carbon cycle of boreal lakes. PhD, Uppsala University
Chmiel HE, Niggemann J, Kokic J, Ferland MÈ, Dittmar T, Sobek S (2015) Uncoupled organic matter burial and quality in boreal lake sediments over the Holocene. J Geophys Res Biogeosci 120:1751–1763
Cole JJ et al (2007) Plumbing the global carbon cycle: integrating inland waters into the terrestrial carbon budget. Ecosystems 10:171–184. https://doi.org/10.1007/s10021-006-9013-8
Dadi T, Friese K, Wendt‐Potthoff K, Koschorreck M (2015) Benthic dissolved organic carbon fluxes in a drinking water reservoir. Limnol Oceanogr. https://doi.org/10.1002/lno.10224
Ferland ME, Prairie YT, Teodoru C, Giorgio PA (2014) Linking organic carbon sedimentation, burial efficiency, and long-term accumulation in boreal lakes. J Geophys Res Biogeosci 119:836–847
Gonsior M, Schmitt-Kopplin P, Bastviken D (2013) Depth-dependent molecular composition and photo-reactivity of dissolved organic matter in a boreal lake under winter and summer conditions. Biogeosciences 10:6945–6956
Grybos M, Davranche M, Gruau G, Petitjean P, Pédrot M (2009) Increasing pH drives organic matter solubilization from wetland soils under reducing conditions. Geoderma 154:13–19
Jones D, Edwards A (1998) Influence of sorption on the biological utilization of two simple carbon substrates. Soil Biol Biochem 30:1895–1902
Keil RG, Montlucon DB, Prahl FG, Hedges JI (1994) Sorptive preservation of labile organic-matter in marine-sediments. Nature 370:549–552
Kleber M, Eusterhues K, Keiluweit M, Mikutta C, Mikutta R, Nico PS (2015) Mineral-organic associations: formation, properties, and relevance in soil environments. Adv Agron 130:1–140. https://doi.org/10.1016/bs.agron.2014.10.005
Köhler SJ, Kothawala D, Futter MN, Liungman O, Tranvik L (2013) In-lake processes offset increased terrestrial inputs of dissolved organic carbon and color to lakes. PLoS ONE. https://doi.org/10.1371/journal.pone.0070598
Kortelainen P, Pajunen H, Rantakari M, Saarnisto M (2004) A large carbon pool and small sink in boreal Holocene lake sediments. Glob Change Biol 10:1648–1653
Kortelainen P et al (2006) Sediment respiration and lake trophic state are important predictors of large CO2 evasion from small boreal lakes. Glob Change Biol 12:1554–1567
Kritzberg E, Ekström S (2012) Increasing iron concentrations in surface waters—a factor behind brownification? Biogeosciences 9:1465–1478
Lalonde K, Mucci A, Ouellet A, Gélinas Y (2012) Preservation of organic matter in sediments promoted by iron. Nature 483:198–200
Langenheder S, Lindström ES, Tranvik LJ (2005) Weak coupling between community composition and functioning of aquatic bacteria. Limnol Oceanogr 50(3):957–967
Lehman JT (1980) Release and cycling of nutrients between planktonic algae and herbivores. Limnol Oceanogr 25:620–632
Lindström ES (2000) Bacterioplankton community composition in five lakes differing in trophic status and humic content. Microb Ecol 40(2):104–113
Mehra O, Jackson M (1960) Iron oxide removal from soils and clays by a dithionite–citrate system buffered with sodium bicarbonate. In: Proceedings of the 7th national conference on clays, p 317–327
Peter S, Isidorova A, Sobek S (2016) Enhanced carbon loss from anoxic lake sediment through diffusion of dissolved organic carbon. J Geophys Res Biogeosci. https://doi.org/10.1002/2016jg003425
Peter S, Agstam O, Sobek S (2017) Widespread release of dissolved organic carbon from anoxic boreal lake sediments. Inland Waters. https://doi.org/10.1080/20442041.2017.1300226
Poulton SW, Canfield DE (2005) Development of a sequential extraction procedure for iron: implications for iron partitioning in continentally derived particulates. Chem Geol 214:209–221
Skoog AC, Arias-Esquivel VA (2009) The effect of induced anoxia and reoxygenation on benthic fluxes of organic carbon, phosphate, iron, and manganese. Sci Total Environ 407:6085–6092
Thamdrup B, Fossing H, Jørgensen BB (1994) Manganese, iron and sulfur cycling in a coastal marine sediment, Aarhus Bay, Denmark. Geochim Cosmochim Acta 58:5115–5129
Tipping E, Woof C (1983) Seasonal variations in the concentrations of humic substances in a soft-water lake. Limnol Oceanogr 28:168–172. https://doi.org/10.4319/lo.1983.28.1.0168
Tipping E, Rey-Castro C, Bryan SE, Hamilton-Taylor J (2002) Al(III) and Fe(III) binding by humic substances in freshwaters, and implications for trace metal speciation. Geochim Cosmochim Acta 66:3211–3224
Viollier E, Inglett P, Hunter K, Roychoudhury A, Van Cappellen P (2000) The ferrozine method revisited: Fe(II)/Fe(III) determination in natural waters. Appl Geochem 15:785–790
von Wachenfeldt E, Tranvik LJ (2008) Sedimentation in boreal lakes—the role of flocculation of allochthonous dissolved organic matter in the water column. Ecosystems 11:803–814
Wagai R, Mayer LM (2007) Sorptive stabilization of organic matter in soils by hydrous iron oxides. Geochim Cosmochim Acta 71:25–35
Weyhenmeyer GA, Prairie YT, Tranvik LJ (2014) Browning of boreal freshwaters coupled to carbon–iron interactions along the aquatic continuum. PLoS ONE 9:e88104
Acknowledgements
This work was supported by The Swedish Research Council Formas (to S.S.), the Swedish Research Council (VR; to S.S.), and by Uppsala University. The research leading to these results has received additional funding from the European Research Council under the European Union’s Seventh Framework Programme (FP7/2007–2013)/ERC Grant Agreement No. 336642 to S.S.
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Peter, S., Sobek, S. High variability in iron-bound organic carbon among five boreal lake sediments. Biogeochemistry 139, 19–29 (2018). https://doi.org/10.1007/s10533-018-0456-8
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DOI: https://doi.org/10.1007/s10533-018-0456-8