Research Article
Characterization of the trophic conditions of marine coastal waters with special reference to the NW Adriatic Sea: proposal for a trophic scale, turbidity and generalized water quality index
R. A. Vollenweider,
F. Giovanardi, G. Montanari,
A. Rinaldi,
Corresponding Author
R. A. Vollenweider
Laboratory ‘M. M. Daphne II’, Emilia Romagna Region, Centre for Marine Research, Cesenatico (Forli), Italy
National Water Research Institute, Canada Centre for Inland Waters, Burlington, Ontario, Canada
National Water Research Institute, 867 Lakeshore Road, Burlington, Ontario, Canada L7R 4A6.Search for more papers by this authorG. Montanari
Laboratory ‘M. M. Daphne II’, Emilia Romagna Region, Centre for Marine Research, Cesenatico (Forli), Italy
Search for more papers by this authorA. Rinaldi
Laboratory ‘M. M. Daphne II’, Emilia Romagna Region, Centre for Marine Research, Cesenatico (Forli), Italy
Search for more papers by this authorR. A. Vollenweider,
F. Giovanardi, G. Montanari,
A. Rinaldi,
Corresponding Author
R. A. Vollenweider
Laboratory ‘M. M. Daphne II’, Emilia Romagna Region, Centre for Marine Research, Cesenatico (Forli), Italy
National Water Research Institute, Canada Centre for Inland Waters, Burlington, Ontario, Canada
National Water Research Institute, 867 Lakeshore Road, Burlington, Ontario, Canada L7R 4A6.Search for more papers by this authorG. Montanari
Laboratory ‘M. M. Daphne II’, Emilia Romagna Region, Centre for Marine Research, Cesenatico (Forli), Italy
Search for more papers by this authorA. Rinaldi
Laboratory ‘M. M. Daphne II’, Emilia Romagna Region, Centre for Marine Research, Cesenatico (Forli), Italy
Search for more papers by this authorFirst published: 04 December 1998
Citations: 409
Abstract
In pursuing earlier attempts to characterize the trophic state of inland waters, a new trophic index (TRIX) based on chlorophyll, oxygen saturation, mineral and total nitrogen and phosphorus, and applicable to coastal marine waters, is proposed. Numerically, the index is scaled from 0 to 10, covering a wide range of trophic conditions from oligotrophy to eutrophy. Secchi disk transparency combined with chlorophyll, instead, defines a turbidity index (TRBIX) that serves as complementary water quality index. The two indices are combined in a general water quality index (GWQI). Statistical properties and application of these indices to specific situations are discussed on examples pertaining to the NW Adriatic Sea. It is believed that these indices will simplify and make comparison between different spatial and temporal trophic situations of marine coastal waters more consistent. © 1998 John Wiley & Sons, Ltd.
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