The effects of increased CO[sub 2] on the competitive ability of Lupinus arboreus, a dominant nitrogen-fixing shrub
- State Univ. of New York, Stony Brooks (United States)
Plant responses to increased atmospheric CO[sub 2] have been shown to be both species-specific and dependent on other environmental factors, potentially changing competitive interactions and altering community structure. The competitive response of a dominant nitrogen-fixing shrub to an introduced annual (Bromus diandrus) and a native perennial grass (Bromus carinatus) was measured under ambient and high CO[sub 2] and two nitrogen levels. These species coexist in a generally nitrogen-limited coastal grassland reserve besieged with alien species. The relative competitive ability of the lupin increased with CO[sub 2] for all treatments, with the largest difference occurring at low nitrogen in competition with the introduced annual. This study provides a global change perspective for those interested in conserving native Californian grassland species, as well as the first data on the competitive response of nitrogen-fixers to high CO[sub 2].
- OSTI ID:
- 6143008
- 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
RANGELANDS
POPULATION DYNAMICS
GRAMINEAE
NITROGEN FIXATION
SHRUBS
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
ECOSYSTEMS
LILIOPSIDA
MAGNOLIOPHYTA
OXIDES
OXYGEN COMPOUNDS
PLANTS
TERRESTRIAL ECOSYSTEMS
560300* - Chemicals Metabolism & Toxicology
560400 - Other Environmental Pollutant Effects