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Large-Scale Enclosed Water-Column Ecosystems an Overview of Foodweb I, the Final CEPEX Experiment

Published online by Cambridge University Press:  11 May 2009

G. D. Grice ,
R. P. Harris ,
M. R. Reeved ,
J. F. Heinbokel  and
C. O. Davis
G. D. Grice
Affiliation:
* Woods Hole Oceanographic Institution, Woods Hole, Massachusetts 02543, U.S.A.
R. P. Harris
Affiliation:
The Laboratory, Marine Biological Association, Citadel Hill, Plymouth
M. R. Reeved
Affiliation:
University of Miami, Rosenstiel School of Marine and Atmospheric Science, 4600 Rickenbacker Causeway, Miami, Florida 33149, U.S.A.
J. F. Heinbokel
Affiliation:
The Johns Hopkins University, Chesapeake Bay Institute, Charles & 34th Sts, Baltimore, Maryland 21218, U.S.A.
C. O. Davis
Affiliation:
San Francisco State University, Tiburon Center for Environmental Studies, Box 855, Tiburon, California 94920, U.S.A.
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Extract

Enclosures of various sizes and configurations have been employed to maintain natural planktonic communities and to examine their responses to pollutants (e.g. Menzel & Steele, 1978; Steele, 1979). Studies on feeding, growth, and mortality of larval fishes, at times conducted in conjunction with pollution experiments, have also been successfully conducted in large enclosures (Koeller & Parsons, 1977). Implicit in these and other comparable studies has been the expectation (or hope) that a balance could be achieved between the advantages and difficulties inherent in more traditional field and laboratory studies. Field studies offer the realism of working with the natural assemblage with its many interacting components and links, but also suffer the disadvantage associated with a turbulent and advective system, which generally makes the repetitive sampling of the same populations impossible. Laboratory studies reverse the balance; control and definition of the components are gained at the expense of realism. The use of large containers represents a hybrid approach characterized by a partial control over a moderately realistic ecosystem. In the ideal case, the use of large containers allows sufficient control to permit experimental manipulation of (and the testing of hypotheses concerning) planktonic assemblages which are sufficiently realistic to permit extension of the experimental results to the ‘real world’.

Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 60 , Issue 2 , May 1980 , pp. 401 - 414
Copyright
Copyright © Marine Biological Association of the United Kingdom 1980

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