Chemometric Studies in the Lagoon of Venice, Italy. Annual Evolution of Sulphur Species and Relationship to Biogeochemical Cycles in Lagoon Water
Ivo Moret
Dipartimento di Scienze Ambientali, Università Ca' Foscari, Dorsoduro 2137, I-30123 Venezia, Italy
C.N.R., Istituto per la Dinamica dei Processi Ambientali, Dorsoduro 2137, I-30123 Venezia, Italy
Search for more papers by this authorAndrea Gambaro
Dipartimento di Scienze Ambientali, Università Ca' Foscari, Dorsoduro 2137, I-30123 Venezia, Italy
C.N.R., Istituto per la Dinamica dei Processi Ambientali, Dorsoduro 2137, I-30123 Venezia, Italy
Search for more papers by this authorRossano Piazza
Dipartimento di Scienze Ambientali, Università Ca' Foscari, Dorsoduro 2137, I-30123 Venezia, Italy
Search for more papers by this authorFabiana Corami
Dipartimento di Scienze Ambientali, Università Ca' Foscari, Dorsoduro 2137, I-30123 Venezia, Italy
C.N.R., Istituto per la Dinamica dei Processi Ambientali, Dorsoduro 2137, I-30123 Venezia, Italy
Search for more papers by this authorCesare Ravazzi
C.N.R., Istituto per la Dinamica dei Processi Ambientali, via Mangiagalli 34, I-20133 Milano, Italy
Search for more papers by this authorCarlo Andreoli
Dipartimento di Biologia, Università di Padova, Via Trieste 75, I-35121 Padova, Italy
Search for more papers by this authorCristina Truzzi
Dipartimento di Scienze del Mare, Università Politecnica delle Marche - Ancona, Via Brecce Bianche, I-60131 Ancona, Italy
Search for more papers by this authorLuca Lambertucci
Dipartimento di Scienze del Mare, Università Politecnica delle Marche - Ancona, Via Brecce Bianche, I-60131 Ancona, Italy
Search for more papers by this authorCorresponding Author
Giuseppe Scarponi
Dipartimento di Scienze del Mare, Università Politecnica delle Marche - Ancona, Via Brecce Bianche, I-60131 Ancona, Italy
>Dipartimento di Scienze del Mare, Università Politecnica delle Marche - Ancona, Via Brecce Bianche, I-60131 Ancona, Italy, fax: (+39)-071-2204650Search for more papers by this authorIvo Moret
Dipartimento di Scienze Ambientali, Università Ca' Foscari, Dorsoduro 2137, I-30123 Venezia, Italy
C.N.R., Istituto per la Dinamica dei Processi Ambientali, Dorsoduro 2137, I-30123 Venezia, Italy
Search for more papers by this authorAndrea Gambaro
Dipartimento di Scienze Ambientali, Università Ca' Foscari, Dorsoduro 2137, I-30123 Venezia, Italy
C.N.R., Istituto per la Dinamica dei Processi Ambientali, Dorsoduro 2137, I-30123 Venezia, Italy
Search for more papers by this authorRossano Piazza
Dipartimento di Scienze Ambientali, Università Ca' Foscari, Dorsoduro 2137, I-30123 Venezia, Italy
Search for more papers by this authorFabiana Corami
Dipartimento di Scienze Ambientali, Università Ca' Foscari, Dorsoduro 2137, I-30123 Venezia, Italy
C.N.R., Istituto per la Dinamica dei Processi Ambientali, Dorsoduro 2137, I-30123 Venezia, Italy
Search for more papers by this authorCesare Ravazzi
C.N.R., Istituto per la Dinamica dei Processi Ambientali, via Mangiagalli 34, I-20133 Milano, Italy
Search for more papers by this authorCarlo Andreoli
Dipartimento di Biologia, Università di Padova, Via Trieste 75, I-35121 Padova, Italy
Search for more papers by this authorCristina Truzzi
Dipartimento di Scienze del Mare, Università Politecnica delle Marche - Ancona, Via Brecce Bianche, I-60131 Ancona, Italy
Search for more papers by this authorLuca Lambertucci
Dipartimento di Scienze del Mare, Università Politecnica delle Marche - Ancona, Via Brecce Bianche, I-60131 Ancona, Italy
Search for more papers by this authorCorresponding Author
Giuseppe Scarponi
Dipartimento di Scienze del Mare, Università Politecnica delle Marche - Ancona, Via Brecce Bianche, I-60131 Ancona, Italy
>Dipartimento di Scienze del Mare, Università Politecnica delle Marche - Ancona, Via Brecce Bianche, I-60131 Ancona, Italy, fax: (+39)-071-2204650Search for more papers by this authorAbstract
During the period March 1997 — March 1998 dimethyl sulphide (DMS), dimethylsulphoniopropionate (DMSP) and carbon disulphide (CS2) were determined weekly in the water of the Lagoon of Venice, Italy (at three stations located in the Giudecca Canal, the San Secondo Canal and the Rio di San Nicolò). At the same time, the following hydrological and biological variables were also measured: tide height, temperature, transmittance, fluorescence, pH, salinity, chlorinity, sulphate, ammonia, nitrite, nitrate, phosphate, silicate, chlorophyll a, phaeopigments, phytoplankton (abundance and biomass). Principal component analysis (PCA), applied as a dimension reduction tool, made it possible to summarize multivariate information in a small number of components, which highlighted the relationships between the temporal evolutions of the sulphur compounds with hydrological and biological variables in the seasonal biogeochemical cycle of the lagoon. In particular the overall temporal cycle, which begins with the development of biological activity in late winter and spring, followed by the predominance of degradation processes during the late summer and the remineralization of nutrients in autumn, is clearly described in the plane of the first two principal components, together with the interrelationships between all the relevant variables.
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