Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Structure and organization of persistent aquatic laboratory communities exposed to the insecticide dieldrin /
Author Liss, William J.
Other Authors
Author Title of a Work
McClurken-Lilley, Becky L.
Lee, Douglas S.
Publisher U.S. Environmental Protection Agency, Office of Research and Development, Environmental Research Laboratory,
Year Published 1984
Report Number PB84-141183; EPA/600-3-84-013
OCLC Number 778510263
Subjects Insecticides--Toxicology--Environmental aspects--United States.
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
EJBD ARCHIVE EPA 600-3-84-013 Headquarters Library/Washington,DC 12/17/2012
EJBD  EPA 600-3-84-013 c.1 Headquarters Library/Washington,DC 12/18/2012
ELDD  EPA 600-3-84-013 3 copies CCTE/GLTED Library/Duluth,MN 03/12/2012
Collation ii, 86 pages : illustrations ; 28 cm
Cover title. "PB84-141183." "January 1984." "EPA/600-3-84-013." "Cooperative agreement CR80745702." Final report. Includes bibliographical references (pages 84-86). Photocopy.
Contents Notes
Sixteen aquatic communities composed of persistent populations of guppies (Poecilia reticulata), amphipods (Gammarus fasciatus), snails (family Planorbidae), planaria (Dugesia sp.), and various microinvertebrates were established under laboratory conditions. Eight of these communities received low energy input with low habitat availability while the remaining eight communities had high habitat availability and received high energy input. At each level of input, guppy populations in two systems were exploited at either 0, 10, 20, or 40 percent of the population biomass each month. Macroinvertebrates were also sampled monthly for population counts and biomass measurements. After each system reached near steady-state conditions, 1 [mu]g/l of dieldrin was introduced into one system of each treatment. These systems were allowed to reach new steady-state conditions. The response of the systems was dependent upon both the energy input/habitat and exploitation levels. The low energy input/habitat systems were more sensitive to dieldrin particularly at higher levels of exploitation. The influence of organization and environment on population persistence and system structure are explored theoretically with isocline models and the implications for aquatic ecology and environmental management strategies are discussed.