Modeling the Effects of Elevated Tropospheric O sub(3) on Two Varieties of Pinus ponderosa

Variation in response of different genetic varieties of Pinus ponderosa to elevated tropospheric ozone were studied. TREGRO model simulations over a three year period for eastern and western varieties of this species exposed to five different O sub(3) levels showed that growth of the western variety...

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Veröffentlicht in:Canadian journal of forest research 1997-04, Vol.27 (4), p.527-527
Hauptverfasser: Constable, John VH, Taylor, George E
Format: Artikel
Sprache:eng
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Zusammenfassung:Variation in response of different genetic varieties of Pinus ponderosa to elevated tropospheric ozone were studied. TREGRO model simulations over a three year period for eastern and western varieties of this species exposed to five different O sub(3) levels showed that growth of the western variety was reduced more than that of the eastern variety. The greater resistance of the eastern variety to elevated O sub(3) probably is due to lower stomatal conductance and greater carbon allocation to below ground tissues. Regional assessments of the effects of O sub(3) on tree species should take genetic variations into account.
ISSN:0045-5067