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STUDIES ON DISSOLVED CARBOHYDRATE IN CAPE COD WATERS. III. SEASONAL VARIATION IN OYSTER POND AND WEQUAQUET LAKE, MASSACHUSETTS 1
Author(s) -
Walsh Gerald E.
Publication year - 1966
Publication title -
limnology and oceanography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.7
H-Index - 197
eISSN - 1939-5590
pISSN - 0024-3590
DOI - 10.4319/lo.1966.11.2.0249
Subject(s) - morning , oyster , chlorophyll a , phytoplankton , environmental science , seasonality , bloom , oceanography , zoology , fishery , biology , ecology , nutrient , geology , botany
Annual variations in dissolved carbohydrate (DCHO) concentration were found in two lakes between January 1964 and April 1965. In Oyster Pond, a highly productive coastal pond, average monthly concentrations of DCHO in surface water of the north basin varied from about 1.3 to 2.9 mg/liter between February 1964 and April 1965. Lowest concentrations were found during phytoplankton blooms in February. The seasonal curve for DCHO in the morning was almost a mirror image of that for chlorophyll a. Concentrations of DCHO were greater in the afternoon than in the morning, but daily increases did not appear to be related to chlorophyll a concentrations. In the south basin, average monthly concentrations of DCHO increased during summer stagnation (April–September 1964) from 1.5 to 4.2 mg/liter. A high concentration was associated with a bloom of the green bacterium Chlorobium. Concentrations of DCHO in Wequaquet Lake, a less productive body of freshwater, also changed seasonally but were always lower than in Oyster Pond. No DCHO was detected between April and August in surface water in the morning, and the highest concentration (1.2 mg/liter) occurred in February 1965.