||Limnology of Stockbridge Bowl, Stockbridge, Massachusetts.
Ludla, Stuart D. ;
Hutchiso, Karen S. ;
Henderso, George E. ;
||Massachusetts Univ., Amherst. Water Resources Research Center.
||Completion-FY-73-4; OWRR-A-044-MASS; 10561,; A-044-MASS(1)
( Stockbridge Bowl ;
Lake Mahkeenac ;
Dissolved gases ;
Silicon dioxide ;
Littoral zone ;
Aquatic plants ;
Primary biological productivity ;
Water pollution ;
||Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy.
Stockbridge Bowl is a eutrophic hard-water lake. Mean annual gross primary productivity was ca. 4.9 g C per square meter per day. Microcoleus lyngbyaceus dominated the phytoplankton through much of the year and formed a productive metalimnetic plate during summer stratification. Silica never became limiting to diatom growth, despite a spring diatom pulse. Silica, calcium and magnesium all showed inverse clinograde distributions during periods of stratification and values in the hypolimnion began to rise before anoxia. Fall in Ca-Mg hardness and delayed rise in Si values in the summer epilimnion were caused by precipitation of marl and uptake of Si in the littoral zone. Surficial sediments were laminated and the laminae were approximately annual. Analysis of diatom communities in the sediment revealed rapid increase in productivity over the past quarter century associated with development of the watershed.