CHEMICAL COMPOSITION OF AQUATIC MACROPHYTES FROM LAKE COMO
Lake Como is a deep (410 m max depth) subalpine lake, some 50 km long from north to south, with a shoreline 175 km long. Most of the shore is a vertical cliff face rising from deep waters, but a few beaches do exist as deltas of tributaries; the littoral shelf is everywhere very narrow, nevertheless a number of aquatic macrophytes can be detected. In the framework of a wider research on L. Como hydrobiogeochemistry, 151 samples of these macrophytes have been collected to study spatial distribution and the relationships between chemical composition and hydrogeochemical characteristics. Most of the macrophytes belong to the genus Potamogeton (P. perfoliatus, P. lucens, P. crispus, P. gramineus, P. pusillus), but Myriophyllum spicatum and Vallisneria spiralis are well represented too. In a much lower number of stations Elodea densa, E. canadensis, Ranunculus tricophyllus, R. circinatus, Najas marina and Ceratophyllum demersum were found. All specimens were analyzed for chemical concentrations in their growing tips, by using various analytical techniques: Inductively Coupled Plasma (P, Zn, Ni, Ca, Mn, Fe, Cr, Mg, Al, V, Cu, Ti), Hydrid Atomic Absorption Spectroscopy (Hg), Zeeman Graphite Furnace AAS (Cd, Pb, As). Relevant data are reported and discussed in the paper.
Bibliographic Reference: INTERNATIONAL CONFERENCE "HEAVY METALS IN THE ENVIRONMENT", ATHENS (GREECE), SEPT. 10-13, 1985 WRITE TO CEC LUXEMBOURG, DG XIII/A2, POB 1907 MENTIONING PAPER E 32068 ORA
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Record Number: 1989125002100 / Last updated on: 1987-01-01
Available languages: en