Differential species response to elevated CO[sub 2] in a native Florida scrub oak-palmetto community

Conference · Wed Jun 01 04:00:00 EDT 1994 · Bulletin of the Ecological Society of America; (United States)

OSTI ID:7272318

Vieglais, D A; Dugas, W M; Thompson, G; Hinkle, R; Drake, B G

Native Florida scrub oak-palmetto community, with two dominant oak species (Quercus myrtifolia and Q. Geminata) was exposed to twice ambient concentration of atmospheric CO[sub 2] (c[sub a]) for 12 months using open topped chambers at Kennedy Space Center. After complete aboveground harvest at initiation of the experiment, community biomass recovered 50% under ambient and 130% under elevated c[sub a]. Biomass increase in high c[sub a] was due predominantly to Q. myrtifolia rather than Q. geminata. Water use efficiency of the community was increased by approximately 34% under higher c[sub a]. Sap flow of Q. geminata indicated an immediate though not fully reversible effect of c[sub a] on whole plant transpiration; comparable data were not possible for Q. myrtifolia. Leaf respiration for both species was reduced 20% in higher c[sub a], with no apparent acclimation to CO[sub 2] level. Current investigations are focusing on mechanisms of differential species response.

• OSTI ID: 7272318
• Report Number(s): CONF-940894--
• Conference Information: Journal Name: Bulletin of the Ecological Society of America; (United States) Journal Volume: 75:2
• Country of Publication: United States
• Language: English

Related Subjects

560300* -- Chemicals Metabolism & Toxicology
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
BIOLOGICAL EFFECTS
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON OXIDES
CHALCOGENIDES
DEVELOPED COUNTRIES
ECOLOGICAL CONCENTRATION
FLORIDA
FORESTS
GROWTH
NORTH AMERICA
OXIDES
OXYGEN COMPOUNDS
PLANT GROWTH
POPULATION DYNAMICS
USA