Record Display for the EPA National Library Catalog


Main Title A Flow-through testing procedure with duckweed (Lemna minor L.) /
Author Walbridge, Charles T.
CORP Author Environmental Research Lab.-Duluth, Minn.
Publisher Environmental Research Laboratory--Duluth,
Year Published 1977
Report Number EPA; EPA 600/3-77-108
Stock Number PB-272 586
OCLC Number 28372599
Subjects Duckweeds ; Lemnaceae
Additional Subjects Aquatic weeds ; Water pollution ; Water quality ; Indicator species ; Bioassay ; Toxicity ; Nutrition ; Growth ; Plant physiology ; Mortality ; Ecology ; Aquatic plants ; Lemna minor ; Duckweed ; Bioindicators ; Laboratory experiments
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
EJBD  EPA 600-3-77-108 c.1 Headquarters Library/Washington,DC 01/29/2014
ELBD ARCHIVE EPA 600-3-77-108 Received from HQ AWBERC Library/Cincinnati,OH 10/04/2023
ELDD  EPA-600/3-77-108 CCTE/GLTED Library/Duluth,MN 10/25/2002
ESAD  EPA 600-3-77-108 Region 10 Library/Seattle,WA 03/23/2010
NTIS  PB-272 586 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation vi, 20 pages : illustrations ; 28 cm
Lemna minor is one of the smallest flowering plants. Because of its floating habit, ease of culture, and small size it is well adapted for laboratory investigations. Procedures for flow-through tests were developed. Testing procedures were developed with this apparatus. By using the techniques described here, the effects of nutrients or toxicants, singly or in combination, can be determined in several concentrations with several replicates of each. Responses which can be measured include changes in growth rate, changes in death rate, changes in timing of division of colonies, color changes, changes in variability, and modification of the flowering response. Emphasis here is on changes in growth rate determined either by daily frond counts or by final frond numbers.
"EPA-600/3-77-108." "September 1977." Includes bibliographical references (pages 17-19).