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Kulmala, Liisa; Launiainen, Samuli; Pumpanen, Jukka; Lankreijer, Harry; Lindroth, Anders; Hari, Pertti; Vesala, Timo (2011)
Publisher: Tellus B
Journal: Tellus B
Languages: English
Types: Article
We measured H2O and CO2 fluxes at a boreal forest floor using eddy covariance (EC) and chamber methods. Maximum evapotranspiration measured with EC ranged from 1.5 to 2.0 mmol m-2 s-1 while chamber estimates depended substantially on the location and the vegetation inside the chamber. The daytime net CO2 exchange measured with EC (0–2 μmol m-2 s-1) was of the same order as measured with the chambers. The nocturnal net CO2 exchange measured with the chambers ranged from 4 to 7 μmol m-2 s-1 and with EC from ∼4 to ∼5 μmol m-2 s-1 when turbulent mixing below the canopy was sufficient and the measurements were reliable. We studied gross photosynthesis by measuring the light response curves of the most common forest floor species and found the saturated rates of photosynthesis (Pmax) to range from 0.008 (mosses) to 0.184 μmol g-1 s-1 (blueberry). The estimated gross photosynthesis at the study site based on average leaf masses and the light response curves of individual plant species was 2–3 μmol m-2 s-1. At the same time, we measured a whole community with another chamber and found maximum gross photosynthesis rates from 4 to 7 μmol m-2 s-1.DOI: 10.1111/j.1600-0889.2007.00327.x
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    • Aubinet, M., Grelle, A., Ibrom, A., Rannik, U¨., Monchrieff, J. and coauthors 2000. Estimates of the annual net carbon and water exchange of forests: the EUROFLUX Methodology. Adv. Ecol. Res. 30, 113- 178.
    • Baldocchi, D. D. 2003. Assessing the eddy covariance technique for evaluating carbon dioxide exchange rates of ecosystems: past, present and future. Global. Change. Biol. 9, 479-492.
    • Baldocchi, D. D. and Vogel, C. A. 1996. Energy and CO2 flux densities above and below a temperate broad-leaved forest and a boreal pine forest. Tree. Physiol. 16, 5-16.
    • Baldocchi, D. D., Law, B. E. and Anthoni, P. M. 2000. On measuring and modeling energy fluxes above the floor of a homogenous and heterogeneous conifer forest. Agric. For. Meteorol. 102, 187- 206.
    • Blanken, P. D., Black, T. A., Neumann, H. H., Den Hartog, G., Yang, P. C. and co-authors 1998. Turbulent flux measurements above and below the overstory of a boreal aspen forest. Boundary-Layer Meteorol. 89, 109-140.
    • Borken, W., Xu, Y.-J., Brumme, R. and Lamersdorf, N. 1999. A climate change scenario for carbon dioxide and dissolved organic carbon fluxes from a temperate forest soil: drought and rewetting effects. Soil Sci. Soc. Am. J. 63, 1848-1855.
    • Cajander, A. K. 1926. The theory of forest types. Acta For. Fen. 29, 1-108.
    • Constantin, J., Grelle, A., Ibrom, A. and Morgenstern, K. 1999. Flux partitioning between understorey and overstorey in a boreal spruce/pine forest determined by the eddy covariance method. Agric. For. Meteorol. 98-99, 629-643.
    • Gerdol, R., Iacumin, P., Marchesini, R., Bragazza, L. 2000. Water- and nutrient-use efficiency of a deciduous species Vaccinium myrtillus, and evergreen species, V. Vitis-ideae, in a subalpine dwarf shrub heath in the Southern Alps, Italy. Oikos 88, 19-32.
    • Goulden, M. L. and Crill, P. M. 1997. Automated measurements of CO2 exchange at the moss surface of a black spruce forest. Tree Physiol. 17, 537-542.
    • Goulden, M. L., Munger, J. W., Fan, S.-M., Daube, B. C. and Wofsy, S. C. 1996. Measurements of carbon sequestration by long-term eddy covariance: methods and a critical evaluation. Global Change Biol. 2, 159-168.
    • Hari, P. and Kulmala, M. 2005. Station for measuring EcosystemAtmosphere Relations (SMEARII). Bor. Env. Res. 10, 315-322.
    • Heijmans, M. M. P. D., Arp, W. J. and Chaplin III, F. S. 2004. Carbon dioxide and water vapour exchange from understory species in boreal forest. Agric. For. Meteorol. 123, 135-147.
    • Janssens, I. A., Kowalski, A. S. and Ceulemans, R. 2001. Forest floor CO2 fluxes estimated by eddy covariance and chamber-based model. Agric. For. Meteorol. 106, 61-69.
    • Kelliher F. M., Lloyd J., Arneth A., Lu¨hker B., Byers J. N. and co-authors. 1999. Carbon dioxide efflux density from the floor of a central Siberian pine forest. Agric. For. Meteorol. 94, 217-232.
    • Kolari, P., Pumpanen, J., Kulmala, L., Ilvesniemi, H., Nikinmaa, E. and co-authors. 2006. Forest floor vegetation plays an important role in photosynthetic production of boreal forests. For. Ecol. Manage. 221, 241-248.
    • Launiainen, S., Rinne, J., Pumpanen, J., Kulmala, L., Kolari, P. and coauthors. 2005. Eddy covariance measurements of CO2 and sensible and latent heat fluxes during a full year in a boreal pine forest trunkspace. Bor. Env. Res. 10, 569-588.
    • Launiainen, S., Pumpanen, J., Mo¨lder, M., Kulmala, L., Lankreijer, H. and co-authors. 2006. Vertical variations in fluxes and turbulence characteristics within a forest - a joint NECC-campaign in Hyytia¨la¨, Southern Finland. In: Proceeding of BACCI, NECC and FcoE activities 2005 book B, Report Series in Aerosol Sciences 81A (eds. M. Kulmala, A. Lindroth and T. M. Ruuskanen), Helsinki, Finland.
    • Misson, L., Baldocci, D. D., Black, T. A., Blanken, P. D., Brunet, Y. and co-authors. H. 2007. Partitioning forest carbon fluxes with overstory and understory eddy-covariance measurements: a synthesis based on FLUXNET data. Agric. For Meteorol. 144, 14-31.
    • More´n, A.-S. and Lindroth, A. 2000. CO2 exchange at the floor of a boreal forest. Agric. For. Meteorol. 101, 1-14.
    • Pumpanen, J., Ilvesniemi, H., Keronen, P., Nissinen, A., Pohja, T. and co-authors. 2001. An open chamber system for measuring soil surface CO2 efflux: analysis of error sources related to the chamber system. J. Geophys. Res. 106, 7985-7992.
    • Pumpanen, J., Ilvesniemi, H., Peramaki, M. and Hari, P. 2003. Seasonal patterns of soil CO2 efflux and soil air CO2 concentration in a Scots pine forest: comparison of two chamber techniques. Global Change Biol. 9, 371-382.
    • Skre, O. and Oechel, W. 1981. Moss functioning in different taiga ecosystems in interior Alaska. 1. Seasonal, Phenotypic, and drought effects on photosynthesis and response patterns. Oecologia 48, 50-59.
    • Subke, J. A. and Tenhunen, J. D. 2004. Direct measurements of CO2 flux below a spruce forest canopy. Agric. For. Meteorol. 126, 157-168.
    • Swanson, R.-V. and Flanagan, L.-B. 2001. Environmental regulation of carbon dioxide exchange at the forest floor in a boreal black spruce ecosystem. Agric. For. Meteorol. 108(3), 165-181.
    • Valentini, R., Matteucci, G., Dolman, A. J., Schulze, E.-D., Rebmann, C. and co-authors.2000. Respiration as the main determinant of carbon balance in European forests. Nature 404, 861-865.
    • Van Gestel, M., Ladd, J. N. and Amato, M. 1991. Carbon and nitrogen mineralization from two soils of contrasting texture and microaggregate stability: influence of sequential fumigation, drying and storage. Soil Biol. Biochem. 23, 313-322.
    • Whitehead, D. and Gover, S. T. 2000. Photosynthesis and light-use efficiency by plants in a Canadian boreal forest ecosystem. Tree Physiol. 21, 925-929.
    • Wide´n, B. 2002. Seasonal variation in forest-floor CO2 exchange in a Swedish coniferous forest. Agric. For. Meteorol. 111, 283-297.
    • Williams, T. G. and Flanagan, L. B. 1998. Measuring and modelling environmental influences on photosynthetic gas exchange in Sphagnum and Pleurozium. Plant Cell Env. 21, 555-564.
    • Wilson, K. B. and Meyers, T. P. 2001. The spatial variability of energy and carbon dioxide fluxes at the floor of a deciduous forest. BoundaryLayer Meteorol. 98(3), 443-473.
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