Record Display for the EPA National Library Catalog

RECORD NUMBER: 20 OF 111

OLS Field Name OLS Field Data
Main Title Daily and Seasonal Drift of Organisms in a Warmwater Stream.
Author Larimor, R. Weldon ;
CORP Author Illinois Univ., Urbana. Water Resources Center.
Year Published 1972
Report Number WRC-RR-55 ;UILU-WRC-73-0055; DI-14-01-0001-887; OWRR-B-001-ILL; 14440,; B-001-ILL(1)
Stock Number PB-212 266
Additional Subjects ( Streams ; Animal migrations) ; ( Aquatic biology ; Ecology) ; ( Fishes ; Food supply) ; Water pollution ; Drift ; Daylight ; Wind(Meteorology) ; Rainfall ; Turbidity ; Water quality ; Aquatic animals ; Temperature ; Illinois ; Kaskaskia River
Holdings
Library Call Number Additional Info Location Last
Modified
Checkout
Status
NTIS  PB-212 266 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 06/23/1988
Collation 115p
Abstract
The drift of stream organisms in the Kaskaskia River was investigated over a 2-year period and associated with the time of day, season of the year, turbidity, temperature, water level, and several other environmental factors. The amount of composition of drift showed definite diel and annual patterns. The diel cycle was characterized by a drastic increase in abundance of drifting organisms with the evening reduction of light intensity and a decline in abundance with an increase in light in the very early morning. The annual pattern shows an increase during the spring and into the summer with a gradual decline in the late fall to very low numbers of drift organisms during the winter months. The occurrence of terrestrial organisms in the drift was influenced strongly by heavy rain and strong winds and showed an increase during the autumn when leaves were falling into the water. A mainstream impoundment changed the composition and abundance of drift and contributed great amounts of fish food to the river. (Author)