Woody tissue maintenance respiration of four conifers in contrasting climates

Maintenance respiration for boles of four temperate conifers (ponderosa pine, western hemlock, red pine, and slash pine) were estimated from CO2 efflux measurements in autumn, when construction respiration is low or negligible. Maintenance respiration of stems was linearly related to sapwood volume...

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Published inOecologia Vol. 101; no. 2; p. 133
Main Authors Ryan, M.G. (United State Department of Ariculture for Forest Service, Fort Collins, CO (USA). Rocky Mountain Experiment Station), Gower, S.T, Hubbard, R.M, Waring, R.H, Gholz, H.L, Cropper, W.P. Jr, Running, S.W
Format Journal Article
LanguageEnglish
Published Germany 01.02.1995
Subjects
CARBONE
CARBONO
FACTEUR CLIMATIQUE
FACTORES CLIMATICOS
NUTRICION DE LAS PLANTAS
NUTRITION DES PLANTES
PINUS PONDEROSA
TEMPERATURA
TEMPERATURE
Carbon budgets
Maintenance respiration
Woody-tissue respiration
Temperature response
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Summary:Maintenance respiration for boles of four temperate conifers (ponderosa pine, western hemlock, red pine, and slash pine) were estimated from CO2 efflux measurements in autumn, when construction respiration is low or negligible. Maintenance respiration of stems was linearly related to sapwood volume for all species; at 10 deg C, respiration per unit sapwood volume ranged from 4.8 to 8.3 micromol CO2 m** (3) per second. For all sites combined, respiration increased exponentially with temperature (Q(1O) = 1.7, r(2) = 0.78). It is estimated that maintenance respiration of aboveground woody tissues of these conifers consumes 52-162 g C m** (2) per year, or 5-13% of net daytime carbon assimilation annually. The fraction of annual net daytime carbon fixation used for stem maintenance respiration increased linearly with the average annual temperature of the site
Bibliography:F61
95K0360
ISSN:0029-8549
1432-1939
DOI:10.1007/BF00317276