PHOSPHORUS AVAILABILITY IN A TRIBUTARY OF LAKE LUGANO (RIVER VEDEGGIO)
From April 1982 to March 1983 suspended sediments were collected from a tributary to the Agno basin of Lake Lugano. The samples were chemically analyzed for several forms of phosphorus and bio-assayed to evaluate the algal available phosphorus. The bioassays data showed that Selenastrum capricornutum utilizes about 40% of the total inorganic P. Organic phosphorus in the suspended material was utilized by algae after a mineralization process at the rate of 80%. The results indicate that significant amounts of particulate phosphorus can be utilized by phytoplankton in the euphotic zone. The available phosphorus in suspended sediments of this tributary is about 3 times greater than that of bottom deposits (60% of total P).
Bibliographic Reference: XXII CONGRESS OF THE INT'L ASSOC. OF LIMNOLOGY, LYON (FRANCE), AUG. 21-28, 1983. COMMUNICATIONS OF THE INTERNATIONAL ASSOCIATION FOR THEORETICAL AND APPLIED LIMNOLOGY, NO. 22 (1985), PP. 3351-3355. PUBLISHED BY E. SCHWEIZERBART'SCHE VERLAGSBUCHHANDLUNG, S
Record Number: 1989123112400 / Last updated on: 1987-01-01
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