Effects of CO[sub 2] and climate change on forest trees: Soil biology and enzymology

Conference · Wed Jun 01 04:00:00 EDT 1994 · Bulletin of the Ecological Society of America; (United States)

OSTI ID:7272097

Moldenke, A R; Baumeister, N; Caldwell, B A; Griffith, R; Ingham, E R; Wernz, J ^[1]; Johnson, M G; Rygiewicz, P T; Tingey, D T ^[2]

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1. Oregon State Univ., Corvallis, OR (United States)
2. 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--
• Conference Information: Journal Name: Bulletin of the Ecological Society of America; (United States) Journal Volume: 75:2
• Country of Publication: United States
• Language: English

Related Subjects

560300* -- Chemicals Metabolism & Toxicology
560400 -- Other Environmental Pollutant Effects
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
ANIMALS
ARTHROPODS
ASCHELMINTHES
BACTERIA
BIOLOGICAL EFFECTS
BIOLOGY
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON OXIDES
CHALCOGENIDES
CLIMATIC CHANGE
FUNGI
GROWTH
HELMINTHS
INVERTEBRATES
MICROORGANISMS
NEMATODES
OXIDES
OXYGEN COMPOUNDS
PARASITES
PLANTS
PROTOZOA
SOILS
SPECIES DIVERSITY