Preprint volume - SIBM

Pre-print Volume - Oral presentations
Topic 1: BIODIVERSITY AND CONSERVATION SCIENCE: CONTRIBUTING TO MANAGEMENT
Tab. 1 - Check-List of macrophytes (macroalgae and angiosperms) recorded in some stations of the
Venice Lagoon in June and October 2008 and indices of ecological status application.
Lista delle macrofite (macroalghe e angiosperme) raccolte in alcune stazioni della laguna
di Venezia in giugno ed in ottobre 2008 ed applicazione di indici di stato ecologico.
Macrophytes
EEI Assessment
June
St. 1 (S. Nicolò)
October
June +
October
June
41 st S.I.B.M. CONGRESS Rapallo (GE), 7-11 June 2010
76
St. 2 (Alberoni Ottagono)
October
Total taxa 89 91 105 66 65 88 56 49 75 30 25 40 14 9 17
%Chlorophyta 29 30 31 33 35 35 45 43 41 47 52 53 71 89 71
%Rhodophyta 60 59 58 59 60 58 52 57 56 50 48 45 29 11 29
%Phaeophyceae 8 8 9 5 2 5 4 0 3 3 0 3 0 0 0
R/C 2.0 2.0 1.8 1.8 1.7 1.6 1.2 1.3 1.4 1.1 0.9 0.9 0.4 0.1 0.4
(R/C) / EQR 0.92 0.90 0.84 0.80 0.77 0.74 0.52 0.60 0.61 0.48 0.42 0.39 0.18 0.06 0.19
R/C Assessment High Good Good Poor
-
E-MaQI score 0.90 0.96 0.96 0.84 0.77 0.82 0.55 0.56 0.58 0.39 0.31 0.37 0.21 0.00 0.12
E-MaQI score / EQR 0.87 0.93 0.93 0.81 0.75 0.80 0.54 0.54 0.56 0.39 0.31 0.37 0.21 0.00 0.12
E- MaQI Assessment High
Good
Moderate
% Taxa Coverage
Poor
-
Cymodocea nodosa 50 50 50 - - - - - - - - - - - -
Nanozostera noltii 2.0 1.0 1.5 20 25 22.5 - - - - - - - - -
Zostera marina + + + 60 70 65 - - - - - - - - -
Total seagrass coverage 52 51 51.5 80 95 87.5 - - - - - - - - -
Chaetomorpha linum
Ulvaceae
Cladophora spp.
Gracilariaceae
Polysiphonia-Neosiphonia
Agardhiella subulata
Others
Total macroalgal coverage
Number of high score taxa
% macroalgal high score taxa
R-MaQI score
R- MaQI Assessment
June +
October
June
- - - 3 5 4 - - - - - - - - -
15 12 13.5 10 18 14 53 45 49 8 5 7 1 + 0.5
6 3 4.5 4 9 7 2 1 2 2 + 3 + - +
18 10 14 7 12 10 13 24 19 6 3 5 + + +
3 2 2.5 8 8 8 1 1 1 + + + + - +
6 3 4.5 2 1 2 3 1 2 1 - + - - -
6 4 5 6 4 5 5 3 4 + + + + + +
54 34 44 40 57 49 77 75 76 17 8 14 1 0 0.5
21 24 29 12 11 16 4 3 5 0 0 0 0 0 0
24 26 28 18 17 18 7 6 7 0 0 0 0 0 0
0.9 0.9 1.0 0.8 0.8 0.8 0.6 0.6 0.6 0.3 0.3 0.3 0.2 0.1 0.15
High Good Moderate Poor Bad
Moderate Good Bad -
-
The results obtained by applying E-MaQI are similar to the R/C assessment, except at
St. 3 (Lido watershed) where the classification results to be “Moderate”. However, the
normalised scores obtained by the two indices are very close one to the other and to the
boundary classes. Also E-MaQI is not applicable at St. 5 (Airport) because of the low
number of taxa.
On the contrary R-MaQI can be applicable also if macrophytes are quite missing and
St. 5 (Marco Polo Airport), as expected, is assessed as “Bad”. For all the other stations
the environmental assessment is the same of that obtained by E-MaQI.
St. 3 (Lido watersched)
October
June +
October
June
St. 4 (San Giuliano)
October
June +
October
June
St. 5 (Marco Polo Airport)
October
June +
October