Effects of CO[sub 2] and climate change on forest trees: Soil biology and enzymology
- Oregon State Univ., Corvallis, OR (United States)
- Environmental Protection Agency, Corvallis, OR (United States)
Samples of Teracosm soils were analyzed shortly after initial setup to determine whether initial conditions were equivalent and matched expected values for local soils. Total and active fungal biomass, active bacterial biomass and protozoan numbers were reduced, with greatest decreases occurring in the A horizon. No effect was observed on total bacterial biomass, nematode or anthropod densities, but changes in nematode and arthropod species composition occurred. Significant differences in total density and species composition occurred between the enclosed Teracosms and the open controls. Arthropod and nematode community structure in the three altitudinal field sites had significantly diverged. No significant differences in activities of key soil enzymes in C- and N-cycling (acid phosphatase, protease, B-glucosidase, phenol oxidase and peroxidase) were found between initial samples relative to treatment, but all levels were significantly difference relative to depth in soil profile. Activities were within ranges previously observed in forests of the Pacific Northwest.
- OSTI ID:
- 7272097
- Report Number(s):
- CONF-940894-; CODEN: BECLAG
- Journal Information:
- Bulletin of the Ecological Society of America; (United States), Vol. 75:2; Conference: Annual Ecological Society of America (ESA) meeting: science and public policy, Knoxville, TN (United States), 7-11 Aug 1994; ISSN 0012-9623
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
CARBON DIOXIDE
BIOLOGICAL EFFECTS
CLIMATIC CHANGE
SOILS
BIOLOGY
ARTHROPODS
BACTERIA
FUNGI
GROWTH
NEMATODES
PROTOZOA
SPECIES DIVERSITY
ANIMALS
ASCHELMINTHES
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
HELMINTHS
INVERTEBRATES
MICROORGANISMS
OXIDES
OXYGEN COMPOUNDS
PARASITES
PLANTS
560300* - Chemicals Metabolism & Toxicology
560400 - Other Environmental Pollutant Effects