Preprint volume - SIBM

Pre-print Volume - Oral presentations
Topic 1: BIODIVERSITY AND CONSERVATION SCIENCE: CONTRIBUTING TO MANAGEMENT
substrata. Macroalgae have been recorded in June and October 2008 by SCUBA
divers. Concurrently, total macrophyte coverage was determined. The coverage of the
dominant taxa was obtained by sorting and weighting the dominant taxa of 3-6 samples
recorded by a rake according to ISPRA sampling methodologies (ISPRA, 2008) and
their successive integration which is under publication. The reference EQR values are
1.03 and 1.00 for euhaline and polyhaline stations, respectively (Sfriso et al., 2009).
Fig. 1 – Central part of the Venice Lagoon and sampling stations. Assessment by MaQI application.
Parte centrale della laguna di Venezia e stazioni di campionamento. Valutazione dello stato
ecologico mediante l'applicazione dell'indice MaQI.
Results – Total macrophytes ranged from 107 taxa (105 macroalgae and 2
angiosperms) at St. 1 (San Nicolò) to 17 taxa at St. 5 (Marco Polo Airport) (Tab. 1).
The numbers are the sum of the taxa recorded in June and October and, obviously they
are higher than each single sampling. Seagrasses were recorded only at St. 1 (San
Nicolò) and at St. 2 (Alberoni Ottagono). The R/C ratio, ranged from 1.8 at St. 1 to 0.4
at St. 5. By normalising the values with the highest values recorded in the reference
areas (2.21 and 2.00 for euhaline and polyhaline stations, respectively, Sfriso et al.,
2009) the station assessment is “High” for St. 1, “Good” for Sts. 2 (Alberoni Ottagono)
and 3 (Lido watershed), “Poor” for St. 4 (San Giuliano) whereas at station 5 (Marco
Polo Airport) the index is not applicable because of the number of species is lower than
20.
41 st S.I.B.M. CONGRESS Rapallo (GE), 7-11 June 2010
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