||Acid Rain and Soil Microbial Activity: Effects and Their Mechanisms.
Killham, K. ;
Firestone, M. K. ;
McColl, J. G. ;
||California Univ., Berkeley.;Corvallis Environmental Research Lab., OR.
Soil microbiology ;
Water pollution ;
Forest land ;
Acid precipitation ;
||Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy.
||In the investigation, our aim was to determine if acid rain affects soil microbial activity and to identify possible mechanisms of observed effects. A Sierran forest soil (pH 6.4) planted with Ponderosa pine seedlings was exposed to simulated rain (pH 2.0, 3.0, 4.0 and 5.6) with ionic composition reflecting that found in northern California, corresponding to 15 cm of precipitation over a 12-week period. After exposure, the soils were collected in two samples (top 1 cm and 4 to 5 cm), which were assayed separately for respiration and enzyme activies (urease, phosphatase, dehyrogenase, and arylsulfatase). Changes in microbial activity were most significant in surface soils. Only the pH 2.0 input caused inhibition of both respiration and enzyme activities. (Copyright (c) 1983, ASA, CSSA, SSSA.)
||Sponsored by Corvallis Environmental Research Lab., OR.
||Pub. in Jnl. of Environmental Quality, v12 n1 p133-137 Jan-Mar 83.
|NTIS Title Notes
||Reprint: Acid Rain and Soil Microbial Activity: Effects and Their Mechanisms.
|PUB Date Free Form
||2F; 6M; 8M; 68A; 68D; 48D; 48E; 57K
||Not available NTIS