Integrated watershed study: An investigation of the biota in the Emerald Lake system and stream-channel experiments. Final report
As part of the Integrated Watershed Study in the vicinity of Emerald Lake, Sequoia National Park, investigators conducted baseline monitoring of benthic invertebrates in the inflow streams and the outflow stream. During summer 1986 they carried out a series of acidification experiments in artificial stream channels located in the drainage of the Marble Fork of the Kaweah River. Twelve channels (2.4 m x 20 cm x 20 cm) were stocked with natural substrates, algae and invertebrates. In the treatment channels the pH was reduced to 4.6 and 5.2, using a mixture of nitric and sulfuric acids. Measurements of benthic densities, drift rates and algal densities were made before, during and after each acid treatment of 8 hours duration. Diatom populations declined in the acidified channels, while other periphyton species actually increased with the treatment.
- Research Organization:
- California Univ., Santa Barbara, CA (USA)
- OSTI ID:
- 5230066
- Report Number(s):
- PB-89-225395/XAB
- Resource Relation:
- Other Information: See also PB--88-246293
- Country of Publication:
- United States
- Language:
- English
Similar Records
Chemical and biological characteristics of Emerald Lake and the streams in its watershed and the responses of the lake and streams to acidic deposition. Final report
Executive summary - Assessing the response of Emerald Lake, an alpine watershed in Sequoia National Park, California, to acidification during snowmelt using a simple hydrochemical model
Related Subjects
ACID RAIN
CALIFORNIA
WATERSHEDS
ACIDIFICATION
AIR POLLUTION
ALGAE
DENSITY
DEPOSITION
DIATOMS
DIPTERA
INVERTEBRATES
NITRIC ACID
PROGRESS REPORT
SUBSTRATES
SULFURIC ACID
WATER POLLUTION
ANIMALS
ARTHROPODS
ATMOSPHERIC PRECIPITATIONS
CHROMOPHYCOTA
DOCUMENT TYPES
FEDERAL REGION IX
HYDROGEN COMPOUNDS
INORGANIC ACIDS
INSECTS
NORTH AMERICA
PHYSICAL PROPERTIES
PLANTS
POLLUTION
RAIN
USA
540320* - Environment
Aquatic- Chemicals Monitoring & Transport- (1990-)
540120 - Environment
Atmospheric- Chemicals Monitoring & Transport- (1990-)