Effects of atmospheric CO[sub 2] and soil NO[sub 3][sup [minus]] on tree-insect interactions. I. Phytochemical responses
- 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-; CODEN: BECLAG
- Journal Information:
- Bulletin of the Ecological Society of America; (United States), Vol. 74:2; Conference: 78. annual Ecological Society of America (ESA) meeting, Madison, WI (United States), 31 Jul - 4 Aug 1993; ISSN 0012-9623
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
CARBON DIOXIDE
BIOLOGICAL EFFECTS
NITROGEN OXIDES
TREES
BIOCHEMISTRY
PLANT GROWTH
ASPENS
MAPLES
NITROGEN
OAKS
SOILS
STARCH
CARBOHYDRATES
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
CHEMISTRY
ELEMENTS
GROWTH
MAGNOLIOPHYTA
MAGNOLIOPSIDA
NITROGEN COMPOUNDS
NONMETALS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PLANTS
POLYSACCHARIDES
POPLARS
REAGENTS
SACCHARIDES
560300* - Chemicals Metabolism & Toxicology