Effects of atmospheric CO[sub 2] and soil NO[sub 3][sup [minus]] on tree-insect interactions. I. Phytochemical responses

Conference · Tue Jun 01 04:00:00 EDT 1993 · Bulletin of the Ecological Society of America; (United States)

OSTI ID:6143559

Lindroth, R L; Kinney, K K ^[1]

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1. Univ. of Wisconsin, Madison (United States)

Physiological and growth responses of trees to elevated atmospheric CO[sub 2] are influenced by soil nutrient availability. Interactive effects of these factors on tree chemical composition, however, are largely unknown. We used a split-plot experimental design to assess the impact of CO[sub 2] (whole plots; 355 and 650 ppm) and soil NO[sub 3][sup [minus]] (subplots; 1.25 and 7.5 mm) on foliar chemistry of quaking aspen (Populus tremuloides) red oak (Quercbs rubra) and sugar maple (Acer saccharum). Foliar nitrogen concentrations declined in response to high CO[sub 2] but increased in response to high NO[sub 3][sup [minus]]. Starch and condensed tannin concentrations generally increased in response to high CO[sub 2] and/or low NO[sub 3][sup [minus]] availability. The magnitude of responses varied among tree species. Results were largely consistent with carbon-nutrient balance theory, and indicate that forest dynamics (e.g., herbivory) may change due to direct and interactive effects of CO[sub 2] and NO[sub 3][sup [minus]].

• OSTI ID: 6143559
• Report Number(s): CONF-930798--
• Conference Information: Journal Name: Bulletin of the Ecological Society of America; (United States) Journal Volume: 74:2
• 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.
ASPENS
BIOCHEMISTRY
BIOLOGICAL EFFECTS
CARBOHYDRATES
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON OXIDES
CHALCOGENIDES
CHEMISTRY
ELEMENTS
GROWTH
MAGNOLIOPHYTA
MAGNOLIOPSIDA
MAPLES
NITROGEN
NITROGEN COMPOUNDS
NITROGEN OXIDES
NONMETALS
OAKS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PLANT GROWTH
PLANTS
POLYSACCHARIDES
POPLARS
REAGENTS
SACCHARIDES
SOILS
STARCH
TREES