KolariPumpanenRannikEtAl2004

Référence

Kolari, P., Pumpanen, J., Rannik, U., Ilvesniemi, H., Hari, P., Berninger, F. (2004) Carbon balance of different aged Scots pine forests in Southern Finland. Global Change Biology, 10(7):1106-1119.

Résumé

We estimated annual net ecosystem exchange (NEE) of a chronosequence of four Scots pine stands in southern Finland during years 2000-2002 using eddy covariance (EC). Net ecosystem productivity (NEP) was estimated using growth measurements and modelled mass losses of woody debris. The stands were 4, 12, 40 and 75 years old. The 4-year-old clearcut was a source of carbon throughout the year combining a low gross primary productivity (GPP) with a total ecosystem respiration (TER) similar to the forest stands. The annual NEE of the clearcut, measured by EC, was 386 g C m-2. Tree growth was negligible and the estimated NEP was -262 g C m-2 a-1. The annual GPPs at the other sites were close to each other (928-1072g C m-2 a-1), but TER differed markedly, being greatest at the 12-year-old site (905 g C m-2 a-1) and smallest in the 75-year-old stand (616 g C m-2 a-1). Measurements of Soil CO2 efflux showed that different rates of soil respiration largely explained the differences in TER. The NEE and NEP of the 12-year-old stand were close to zero. The forested stands were sinks of carbon. They had similar annual patterns of carbon exchange and half-hourly eddy fluxes were highly correlated, indicating similar responses to the environment. The NEE in the 40-year-old stand varied between -179 and -192 g C m-2 a-1, while NEP was between 214 and 242 g C m-2 a-1. The annual NEE of the 75-year-old stand was 323 g C m-2 and NEP was 252 g C m-2. This indicates that there was no reduction in carbon sink strength with stand age. © 2004 Blackwell Publishing Ltd.

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@ARTICLE { KolariPumpanenRannikEtAl2004,
    AUTHOR = { Kolari, P. and Pumpanen, J. and Rannik, U. and Ilvesniemi, H. and Hari, P. and Berninger, F. },
    TITLE = { Carbon balance of different aged Scots pine forests in Southern Finland },
    JOURNAL = { Global Change Biology },
    YEAR = { 2004 },
    VOLUME = { 10 },
    PAGES = { 1106-1119 },
    NUMBER = { 7 },
    NOTE = { 13541013 (ISSN) Cited By (since 1996): 23 Export Date: 24 April 2007 Source: Scopus doi: 10.1111/j.1365-2486.2004.00797.x Language of Original Document: English Correspondence Address: Kolari, P.; Departement des Sciences Biologiques; Univ. Que?bec Montre?al; Case postale 8888 Montre?al, Que. H3C 3P8, Canada; email: pasi.kolari@helsinki.fi References: Amiro, B.D., Paired-tower measurements of carbon and energy fluxes following disturbance in the boreal forest (2001) Global Change Biology, 7, pp. 253-268; Baldocchi, D.D., Assessing the eddy covariance technique for evaluating carbon dioxide exchange rates of ecosystems: Past, present and future (2003) Global Change Biology, 9, pp. 479-492; Berninger, F., Nikinmaa, E., Implications of varying pipe model relationships on Scots pine growth in different climates (1997) Functional Ecology, 11, pp. 146-156; Cajander, A.K., Forest types and their significance (1949) Acta Forestalia Fennica, 56, pp. 1-69; Domisch, T., Fine?r, L., Laiho, R., Decomposition of Scots pine litter and the fate of released carbon in pristine and drained pine mires (2000) Soil Biology and Biochemistry, 32, pp. 1571-1580; Eugster, W., McFadden, J.P., Chapin III, F.S., A comparative approach to regional variation in surface fluxes using mobile eddy correlation towers (1997) Boundary-Layer Meteorology, 85, pp. 293-307; (1990) Soil Map of the World: Revised Legend, , FAO-Unesco World Soil Resources Report No. 60, FAO, Rome; Federer, C.A., Organic matter and nitrogen content of the forest floor in even-aged northern hardwoods (1984) Canadian Journal of Forest Research, 14, pp. 763-767; Goulden, M.L., Munger, J.W., Fan, S.M., Measurements of carbon sequestration by long-term eddy covariance: methods and a critical evaluation of accuracy (1996) Global Change Biology, 2, pp. 159-168; Goulden, M.L., Wofsy, S.C., Harden, J.W., Sensitivity of boreal forest carbon balance to soil thaw (1998) Science, 279, pp. 214-217; Hakkila, P., Hakkuupoistuman latvusmassa (1991) Folia Forestalia, 773, pp. 1-28; Ilvesniemi, H., Forsius, M., Fine?r, L., Carbon and nitrogen storages and fluxes in Finnish forest ecosystems (2002) Understanding the Global System, The Finnish Perspective, pp. 69-82. , (eds Ka?yhko? 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    ABSTRACT = { We estimated annual net ecosystem exchange (NEE) of a chronosequence of four Scots pine stands in southern Finland during years 2000-2002 using eddy covariance (EC). Net ecosystem productivity (NEP) was estimated using growth measurements and modelled mass losses of woody debris. The stands were 4, 12, 40 and 75 years old. The 4-year-old clearcut was a source of carbon throughout the year combining a low gross primary productivity (GPP) with a total ecosystem respiration (TER) similar to the forest stands. The annual NEE of the clearcut, measured by EC, was 386 g C m-2. Tree growth was negligible and the estimated NEP was -262 g C m-2 a-1. The annual GPPs at the other sites were close to each other (928-1072g C m-2 a-1), but TER differed markedly, being greatest at the 12-year-old site (905 g C m-2 a-1) and smallest in the 75-year-old stand (616 g C m-2 a-1). Measurements of Soil CO2 efflux showed that different rates of soil respiration largely explained the differences in TER. The NEE and NEP of the 12-year-old stand were close to zero. The forested stands were sinks of carbon. They had similar annual patterns of carbon exchange and half-hourly eddy fluxes were highly correlated, indicating similar responses to the environment. The NEE in the 40-year-old stand varied between -179 and -192 g C m-2 a-1, while NEP was between 214 and 242 g C m-2 a-1. The annual NEE of the 75-year-old stand was 323 g C m-2 and NEP was 252 g C m-2. This indicates that there was no reduction in carbon sink strength with stand age. © 2004 Blackwell Publishing Ltd. },
    KEYWORDS = { Boreal forest Carbon balance Chronosequence Eddy covariance Net ecosystem exchange Net ecosystem productivity Scots pine Soil respiration },
    OWNER = { brugerolles },
    TIMESTAMP = { 2007.12.04 },
}

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