Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Experimental acidification of a stream tributary to Hubbard Brook /
Author Hall, Ronald J. ; Likens, G. E.
Other Authors
Author Title of a Work
Likens, Gene E.,
CORP Author Cornell Univ., Ithaca, NY.;Environmental Research Lab.-Duluth, MN.
Publisher U.S. Environmental Protection Agency, Environmental Research Laboratory,
Year Published 1986
Report Number EPA/600-M-85-011
Stock Number PB85-222792
OCLC Number 16103377
Subjects Acidification--Environmental aspects--New Hampshire.
Additional Subjects Water pollution ; Acidification ; Streams ; Air water interactions ; Experimental design ; Air pollution ; Biomass ; Aluminum organic compounds ; Hydrolysis ; Oxidation ; Insecticides ; Fresh water ; Surface tension ; Complex compounds ; Air pollution ; Forests ; Hubbard Brook ; Acid rain ; Ecosystems ; Water pollution effects(Animals) ; Acid mine drainage
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
EHAM  EPA/600/M-85/011 Region 1 Library/Boston,MA 05/25/2016
EJBD ARCHIVE EPA 600-M-85-011 In Binder Headquarters Library/Washington,DC 02/15/2017
EJBD  EPA 600-M-85-011 In Binder Headquarters Library/Washington,DC 07/19/2017
ELBD  EPA 600-M-85-011 AWBERC Library/Cincinnati,OH 04/10/1998
ELDD  EPA/600/M-85/011 NHEERL/MED Library/Duluth,MN 04/17/2013
Collation 6 pages : 1 illustration, maps ; 28 cm
Long (5 mo.) and short-term (1 h to 2 days) effects of acidic pH have been measured in a poorly buffered mountain stream within the Hubbard Brook Experimental Forest, New Hampshire. Over a 5-month period aluminum, calcium, magnesium, and potassium were mobilized into the stream water during experimental acidification, and nitrogen was lost via invertebrates and organic matter. Periphyton biomass increased at low pH and fungal densities increased. Emergence of adult mayflies, stoneflies and true flies decreased, whereas immature invertebrates in the drift increased. Short-term pulses of acid also changed the stream ecosystem as indicated by significant net fluxes of organic carbon, nitrogen, and phosphorus in biologically bound forms. Aluminum chloride was added to the stream to simulate increased aluminum concentrations during snowmelt. A significant decrease in pH and dissolved organic carbon (DOC) occurred, as well as an increase in foam accumulation at the stream surface. Foam production is thought to be due to decreased surface tension of the water. A 20% reduction of surface tension of stream water was measured in the laboratory. The cause of the reduction is postulated to be the formation of organo-aluminum complexes in the stream. Increases in aluminum concentration were accompanied by changes in both terrestrial and aquatic drift behavior. Six citations are given for complete publications.
Caption title. At head of title: Environmental research brief. "May 1985." Includes bibliographical references (5-6). "EPA/600-M-85-011."