20151127
Author : Ruess, R. W. Hendrick, R. L. Burton, A. J. Pregitzer, K. S. Sveinbjornsson, B. Allen, M. E. Maurer, G. E.
Journal : Ecological Monographs
Comment :
Year : 2003
Title : Coupling fine root dynamics with ecosystem carbon cycling in black spruce forests of interior AlaskaJournal : Ecological Monographs
Comment :
One of the most interesting findings from this study is the relatively high rate of fine root production in floodplain black spruce forests. Annual production of fine roots averaged 228 ± 75 g biomass m-2 yr-1, constituting ;56% of total stand production. Above ground production of trees (50 ± 14 g biomass m-2 yr-1, 13%) and shrubs (40 ± 2 g biomass m-2 yr-1, 11%) contributed similarly to total production, while mosses (73 ± 14 g biomass m-2 yr-1, 20%) accounted for the largest component of above ground production.
Soil temperature had a strong control over both soil respiration (Q10 = 2.21 ± 0.31) and root respiration (Q10 = 2.30 ± 0.37). During the growing season (15 May to 15 September), ; 56% of soil CO2 efflux (580 6 40 gC m-2) was derived from fine root respiration (329 6 54 gC m-2).
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