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CHEMISTRY RESPONSE OF TWO FORESTED WATERSHEDS TO ACID ATMOSPHERIC DEPOSITION 1
Author(s) -
Kress M. W.,
Baker R.,
Ursic S. J.
Publication year - 1990
Publication title -
jawra journal of the american water resources association
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.957
H-Index - 105
eISSN - 1752-1688
pISSN - 1093-474X
DOI - 10.1111/j.1752-1688.1990.tb01409.x
Subject(s) - throughfall , environmental science , deposition (geology) , nitrate , acid rain , leachate , plant litter , forest floor , precipitation , sulfate , canopy , forest ecology , ecosystem , hardwood , litter , hydrology (agriculture) , environmental chemistry , chemistry , ecology , soil water , soil science , geology , geography , structural basin , paleontology , geotechnical engineering , organic chemistry , biology , meteorology
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.