Mycorrhizal response to elevated CO[sub 2] in serpentine grassland communities

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

OSTI ID:6044002

Whitbeck, J L ^[1]

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1. Stanford Univ., CA (United States)

I measured four aspects of mycorrhizal ecology (vesicular-arbuscular mycorrhizal [VAM] root length, percent root colonized, intraradical concentration of the mycorrhizal fungal membrane sterol ergosterol, and substrate spore density) in three experimental systems, each with treatments at ambient ( 350ppm) and twice ambient (700ppm) atmospheric CO[sub 2]. The systems differ in degree of manipulation, ranging from a single species grown in sand in controlled environment chambers, to intact grassland ecosystem plots enclosed in ventilated open-top chambers, and including single to six species serpentine substrate profile. While elevated CO[sub 2] increased all measures of mycorrhizal activity in the most controlled system, it appeared to have no effect on these properties in the intact serpentine grassland ecosystem. Ongoing examination of the intermediate microcosm systems may elucidate whether plant species or substrate properties (such as microbial communities) are responsible for these observed differences in mycorrhizal response.

• OSTI ID: 6044002
• 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.
BIOLOGICAL EFFECTS
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON OXIDES
CHALCOGENIDES
ECOSYSTEMS
ERGOSTEROL
GROWTH
HYDROXY COMPOUNDS
MINERALS
MYCORRHIZAS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PLANT GROWTH
PLANTS
RANGELANDS
ROOTS
SERPENTINE
SILICATE MINERALS
SOILS
SPORES
STEROIDS
STEROLS
TERRESTRIAL ECOSYSTEMS