Chemistry response of two forested watersheds to acid atmospheric deposition

Journal Article · Mon Oct 01 04:00:00 EDT 1990 · Water Resources Bulletin; (United States)

DOI:https://doi.org/10.1111/j.1752-1688.1990.tb01409.x· OSTI ID:6101381

Kress, M W ^[1]; Baker, R ^[2]; Ursic, S J ^[3]

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1. Oklahoma State Univ., Stillwater (United States)
2. Forest Service, Nacogdoches, TX (United States)
3. Forest Service, Oxford, MS (United States)

The deposition and chemistry of precipitation were estimated for one year in two forest ecosystems in the South-Central United States. Precipitation, throughfall, litter leachate, and soil leachate were analyzed for a small catchment of pine-hardwoods in southeastern Oklahoma and for a catchment of loblolly pines (Pinus taeda L.) in northern Mississippi. In the pine-hardwood forest, 98 percent of the acid deposition was neutralized, 50 percent in the forest canopy, and 48 percent in the forest floor. In the pine forest, 75 percent of the acid deposition was neutralized, all in the forest floor. The pine-hardwood ecosystem accumulated sulfate, nitrate, and ammonia ions, and lost base cations. During seasons of deficient precipitation, dry deposition appeared to enrich the concentrations of hydrogen, nitrate, sulfate, and ammonia ions in throughfall samples at both locations.

• OSTI ID: 6101381
• Journal Information: Water Resources Bulletin; (United States), Journal Name: Water Resources Bulletin; (United States) Vol. 26:5; ISSN WARBA; ISSN 0043-1370
• Country of Publication: United States
• Language: English

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