Biogeosciences www.biogeosciences.net 1726-4170 1726-4189 4 6 2007 10.5194/bg-4-975-2007 http://www.biogeosciences.net/4/975/2007/ http://www.biogeosciences.net/4/975/2007/bg-4-975-2007.html http://www.biogeosciences.net/4/975/2007/bg-4-975-2007.pdf 975 984 2007-11-13 Effects of climate, fire and vegetation development on Holocene changes in total organic carbon concentration in three boreal forest lakes in northern Sweden P. Rosén peter.rosen@emg.umu.se D. Hammarlund Climate Impacts Research Centre, UmeÃ¥ University, 981 07 Abisko, Sweden GeoBiosphere Science Centre, Quaternary Sciences, Lund University, Sölvegatan. 12, 22362 Lund, Sweden Near infrared spectroscopy (NIRS), diatoms, pollen, charcoal, loss-on-ignition (LOI), and nutrient elements in lake sediments were used to assess important factors controlling Holocene changes in the total organic carbon (TOC) concentration, pCO₂, color and pH of lake water in three boreal forest lakes in northern Sweden. The results suggest that mire formation, fire frequency and humidity are the most important forcing factors on millennial timescales. Mires produce humic acids that become available to the lakes, whereas fires may reduce the pool of carbon in the catchments, and humidity controls the transportation of allochthonous carbon into the lakes. Vegetation development and temperature as sole factors are of minor importance for the TOC concentrations in these lakes on a millennial timescale. Two of the sites indicate that liming and possibly fish introduction and rotenone treatment in recent time has led to increased TOC, color and pH in the lake water, and changed the diatom community composition to an assemblage that has never been present before. Given the predicted climate change scenario that suggests a more humid climate, expanding mires and less frequent fires, our paleolimnological data suggest that TOC concentrations can be expected to increase in boreal forest lakes in the future. Since super-saturation and emission of CO₂ from lakes is correlated to the TOC concentration of lake water, higher TOC concentrations may lead to increased emission of CO₂ from lakes to the atmosphere. Aas, B. and Faarlund T.: The Holocenen history of the Nordic mountain birch belt, p 5-22. In F.E. Wielgolaski (ed.). Nordic mountain birch ecosystems, Man and the biosphere series vol. 27, The Parthenon Publishing Group, London, UK, 2001. Alexandersson, H., Karlström, C., and Larsson-McCann, S.: Temperaturen och nederbörden i Sverige 1961–1990, SMHI, the Swedish Meteorological and Hydrological Institute, 81, 1–88, 1991. Algesten, G., Sobek, S., Bergstrom, A. K., Ã…gren, A., Tranvik, L. J., and Jansson, M.: Role of lakes for organic carbon cycling in the boreal zone, Global Change Biol., 10, 141–147, 2004. Anderson, N. J., Blomquist, P., and Renberg, I.: An experimental and palaeoecological study of algal responses to lake acidifcation and liming in three central Swedish lakes, Eur. J. Phyc., 32, 35–48, 1997. Andersson, S., Nilsson, S. I., and Saetre, P.: Leaching of dissolved organic carbon (DOC) and dissolved organic nitrogen (DON) in mor humus as affected by temperature and pH, Soil Biol. & Biochem., 32, 1–10, 2000. Barnekow, L.: Holocene tree-line dynamics and inferred climatic changes in the Abisko area, northern Sweden, based on macrofossil and pollen records, The Holocene, 9, 253–265, 1999. Battarbee, R. W., Charles, D. F., Dixit, S. S., and Renberg, I.: Diatoms as indicators of surface waters, in: The diatoms: Applications for the environment and earth science, edited by: Stroemer, E. F. and Smol, J. P., Cambridge University Press, 85–127, 1999. Bigler, C., Grahn, E., Larocque, I., Jeziorski, A., and Hall, R.: Holocene environmental change at Lake Njulla (999 m a.s.l.), northern Sweden: a comparison with four nearby lakes along an altitudinal gradient, J. Paleolim., 29, 13–29, 2003. Birks, H. J. B.: Numerical tools in palaeolimnology – Progress, potentialities, and problems, D. G. Frey and E. S. Deevey Review #1, J. Paleolim., 20, 307–332, 1998. Boyle, J. F: Loss of apatite caused irreversible early Holocene lake acidification, The Holocene, 17(4), 543–547, 2007. Bokobza, L.: Near infrared spectroscopy, J. Near Infrared Spec., 6, 3–17, 1998. Bradshaw, R. H. W. and Zackrisson, O.: A two thousand year history of northern Swedish boreal forest stand, J. Veg. Sci., 1, 519–528, 1990. Cole, J. J., Caraco, N. F., Kling, G. W., and Kratz, T. K.: Carbon dioxide supersaturation in the surface waters of lakes, Science, 265, 1568–1570, 1994. Creed, I. F., Sanford, S. E., Beall, F. D., Molot, L. A., and Dillon, P. J.: Cryptic wetlands: integrating hidden wetlands in regression models of the export of dissolved organic carbon from forested landscapes, Hydrol. Proc., 17, 3629–3648. Das, B., Vinebrooke, R. D., Sanchez-Azofeifa, A., Rivard, B., and Wolfe, A. P.: Inferring sedimentary chlorophyll concentrations with reflectance spectroscopy: a novel approach to reconstructing historical changes in the trophic status of mountain lakes, Can. J. Fish Aquat. Sci., 62, 1067–1078, 2005. Dillon, P. J. and Molot, L. A.: Effects of landscape form on export of dissolved organic carbon, iron, and phosphorus from forested stream catchments, Water Resour. Res., 33, 2591–2600, 1997. Engstrom, D. R., Fritz, S. C., Almendinger, J. E., and Juggins, S.: Chemical and biological trends during lake evolution in recently deglaciated terrain, Nature, 408, 161–166, 2000. Freeman, C., Evans, C. D., and Monteith, D. T.: Export of organic carbon from peat soils, Nature, 412, p 785, 2001. Geladi, P., MacDougall, D., and Martens, H.: Linearization and Scatter-Correction for Near-Infrared Reflectance Spectra of Meat, Appl. Spectrosc., 39, 491–500, 1985. Gennings, C., Molot, L. A., and Dillon, P. J.: Enhanced photochemical loss of organic carbon in acidic waters, Biogeochemistry, 52, 339–354, 2001. Hammarlund, D., Barnekow, L., Birks, H. J. B., Buchardt, B., and Edwards, T. W. D.: Holocene changes in atmospheric circulation recorded in the oxygen-isotope stratigraphy of lacustrine carbonates from northern Sweden, The Holocene, 12, 339–351, 2002. Hindar, A., Kroglund, F., Lydersen, E., Skiple, A., and Høgberget, R.: Liming of wetlands in the acidified Lake Røynelandsvatn catchment in southern Norway: effects on stream water chemistry, Can. J. Fish. Aquat. Sci., 53, 985–993, 1996. Hope, D., Kratz, T. K., and Riera, J. L.: Relationship between PCO₂ and dissolved organic carbon in Northern Wisconsin Lakes, J. Environ. Qual., 25, 1442–1445, 1996. Huntley, B. and Birks, H. J. B.: An atlas of past and present pollen maps for Europe: 0–13 000 years ago, Cambridge University Press, Cambridge, 1983. Jonsson, A., Karlsson, J., and Jansson, M.: Sources of carbon dioxide supersaturation in clearwater and humic lakes in northern Sweden, Ecosystems, 6, 224–235, 2003. Karlsson, J., Jonsson, A., Meili, M., and Jansson, M.: Control of zooplankton dependence on allochthonous organic carbon in humic and clear-water lakes in northern Sweden, Limnol. Oceanogr., 48, 269–276, 2003. Keller, W. B., Heneberry, J., and Leduc, J.: Linkages between weather, dissolved organic carbon, and cold-water habitat in a Boreal Shield lake recovering from acidification, Can. J. Fish. Aquat. Sci., 62, 341–347, 2005. Kling, G. W., Kipphut, G. W., and Miller, M. C.: Arctic lakes and streams as gas conduits to the atmosphere: implications for tundra carbon budgets, Science, 251, 298–301, 1991. Korhola, A., Virkanen, J., Tikkanen, M., and Blom, T.: Fire-induced pH rise in a naturally acid hill-top lake, southern Finland: a paleoecological survey, J. Ecol., 84, 257–265, 1996. Korhola, A., Tikkanen, M., and Weckström, J.: Quantification of Holocene lake-level changes in Finnish Lapland using a cladocera – lake depth transfer model, J. Paleolimnol., 34, 175–190, 2005. Korsman, T., Nilsson, M. B., öhman, J., and Renberg, I.: Near-infrared reflectance spectroscopy of sediments: a potential method to infer the past pH of lakes, Environ. Sci. Technol., 26, 2122–2126, 1992. Korsman, T., Renberg, I., and Anderson, N. J.: A paleolimnological test of the influence of Norway spruce (\textitPicea abies) immigration on lake-water acidity, The Holocene, 4, 132–140, 1994. Korsman, T. and Birks, H. J. B.: Diatom-based water chemistry recontructed from northern Sweden: a comparisson of recontruction techniques, J. Paleolim., 15, 65–77, 1996. Korsman, T. and Segerström, U.: Forest fire and lake-water acidity in a northern Swedish boreal area: Holocene changes in lake-water quality at Makkassjön, J. Ecol., 86, 113–124, 1998. Korsman, T., Nilsson, M. B., Landgren, K., and Renberg, I.: Spatial variability in surface sediment composition characterised by near-infrared (NIR) reflectance spectroscopy, J. Paleolim., 21, 61–71, 1999. Kortelainen, P.: Content of total organic-carbon in Finnish lakes and its relationship to catchment characteristics, Can. J. Fish and Aquat. Sci., 50, 1477–1483, 1993. Laudon, H., Köhler, S., and Buffam, I.: Seasonal TOC export from seven boreal catchments in northern Sweden, Aquat. Sci., 66, 223–230, 2004. Leavitt, P. R., Schindler, D. E., Paul, A. J., Hardie, A. K., and Schindler, D. W.: Fossil pigment records of phytoplankton in troutstocked alpine lakes, Can. J. Fish Aquat. Sci., 51, 2411–23, 1994. Line, J. M. and Birks, H. J. B.: WACALIB version 2.1 – a computer program to reconstruct environmental variables from fossil assemblages by weighted averaging, J. Paleolim., 3, 170–173, 1990. Line, J. M., TerBraak, C. J. F., and Birks, H. J. B.: WACALIB version 3.3 – a computer program to reconstruct environmental variables from fossil assemblages by weighted averaging and to derive sample-specific errors of prediction, J. Paleolim., 10, 147–152, 1994. Martens, H. and Nǽs, T.: Multivariate calibration, John Wiley & Sons, New York, 1989. Meyers, P. A. and Ishiwatari, R.: Lacustrine organic geochemistry – an overview of indicators of organic-matter sources and diagenesis in lake-sediments, Org. Geochem., 20, 867–900, 1993. Meyers, P. A. and Lallier-Verges, E.: Lacustrine sedimentary organic matter records of Late Quaternary paleoclimates, J. Paleolimnol., 21, 345–372, 1999. Molot, L. A. and Dillon, P. J.: Colour – mass balances and colour – dissolved organic carbon relationships in lakes and streams in central Ontario, Can. J. Fish. Aquat. Sci., 54, 2789–2795, 1997. Molot, L. A., Keller, W., Leavitt, P. R., Robarts, R. D., Waiser, M. J., Art, M. T., Clair, T. A. Pienitz, R., Yan, D. K., McNicol, D. K., Prairie, Y. T., Dillon, P. J., Macrae, M., Bello, R., Nordin, R. N., Curtis, P. J., Smol, J. P., and Douglas, M. S. V.: Risk analysis of dissolved organic matter-mediated ultraviolet B exposure in Canadian inland waters, Can. J. Fish. Aquat. Sci., 61, 2511–2521, 2004. Nilsson, M. B., DÃ¥bakk, E., Korsman, T., and Renberg, I.: Quantifying relationships between near-infrared reflectance spectra of lake sediment and water chemistry, Environ. Sci. Technol., 30, 2586–2590, 1996. Norris, K. H., Barnes, R. F., Moore, J. E., and Shenk, J. S.: Predicting forage quality by near-infrared reflectance spectroscopy, J. Anim. Sci., 43, 889–897, 1976. Osborne, G. B. and Fearn, T.: Near Infrared Spectroscopy in Food Analysis, John Wiley & Sons, New York, 1998. Rasmussen, J. B., Godbout, L., and Schallenberg, M.: The humic content of lake water and its relationship to watershed and lake morphometry, Limnol. Oceanogr., 34, 1336–1343, 1989. Reimer, P. J. and 28 others: IntCal04 terrestrial radiocarbon age calibration, 0–26 Cal K yr BP, Radiocarbon, 46, 1029-1058, 2005. Renberg, I. and Wik, M.: Soot particle counting in recent lake sediments: an indirect dating method, Ecolog. Bull., 37, 53–57, 1985. Renberg, I.: The HON-Kajak sediment corer, J. Paleolim., 6, 167–170, 1991. Renberg, I., Korsman, T., and Birks, H. J. B.: Prehistoric increase in the pH of acid-sensitive Swedish lakes caused by land-use changes, Nature, 362, 824–826, 1993. Renberg, I., Bindler, R., and Brännvall, M. L.: Using the historical atmospheric lead-deposition record as a chronological marker in sediment deposits in Europe, The Holocene, 11, 511–516, 2001. Rosén, P., Hall, R., Korsman, T., and Renberg, I.: Diatom transfer-functions for quantifying past air temperature, pH and total organic carbon concentration from lakes in northern Sweden, J. Paleolim., 24, 109–123, 2000a. Rosén, P., DÃ¥bakk, E., Renberg, I., Nilsson M., and Hall, R. I.: Near-infrared spectrometry (NIRS): a new tool for inferring past climatic changes from lake sediments, The Holocene, 10, 161–166, 2000b. Rosén, P., Segerström, U., Renberg, I., and Eriksson, L.: Do diatom, chironomid and pollen records consistently infer Holocene July air temperature? A comparison using sediment cores from four alpine lakes in northern Sweden, Arct. Antarct. Alp. Res., 35, 279–290, 2003. Rosén, P.: Total organic carbon (TOC) of lake water during the Holocene inferred from lake sediments and near-infrared spectroscopy (NIRS) in eight lakes from northern Sweden, Biogeochemistry, 76, 503–516, 2005. Rosén, P. and Persson, P.: Fourier-transform infrared spectroscopy (FTIRS), a new method to infer past changes in tree-line position and TOC using lake sediment, J. Paleolim., 35, 913–923, 2006. Schindler, D. W., Curtis, P. J., Bayley, S. E., Parker, B. R., Beaty, K. G., and Stainton, M. P.: Climate-induced changes in the dissolved organic carbon budgets of boreal lakes, Biogeochemistry, 36, 9–28, 1997. Segerström, U.:The post-glacial history of vegetation and agriculture in the Luleälv river valley, Arch. Environ., 7, 1–79, 1990. Sobek, S., Algesten, G., Bergström, A. K., Jansson, M., and Tranvik, L. J.: The catchment and climate regulation of pCO₂ in boreal lakes, Global Change Biol., 9, 630–641, 2003. Tallantire, P. A.: The palaeohistory of the grey alder (\textitAlnus incana (L.) Moench.) and black alder (\textitAlnus glutinosa (L.) Gaertn.) in Fennoscandia, New Phytologist, 73, 529–546, 1974. Tallantire, P. A.: A further contribution to the problem of the spread of spruce (\textitPicea abies (L.) Karst.) in Fennoscandia, J. Biogeogr., 4, 219–227, 1977. Tranvik, L. J. and Jansson, M.: Climate change – terrestrial export of organic carbon, Nature, 415, 861–862, 2002. Virkanen, J.: The effects of natural environmental changes on sedimentation in Lake Kuttanen, a small closed lake in Finnish Lapland, The Holocene, 10, 377–386, 2000. Wik, M. and Renberg, I.: Environmental records of carbonaceous particles from fossil-fuel combustion: a summary, J. Paleolim., 15, 193–206, 1996.