A Comparison of Abundance and Diversity of Epiphytic Microalgal Assemblages on the Leaves of the Seagrasses Posidonia oceanica (L.) and Cymodocea nodosa (Ucria) Asch in Eastern Tunisia

Table 2

SIMPER results.

Species	Group Posidonia	Group Cymodocea	Av. Diss	Diss/SD	Contrib%	Cum.%
	Av. Abund	Av. Abund
Oscillatoria sp.	500	6000	30.19	6.2	46.85	46.85
Navicula sp.	3933.33	3850	13.36	2.07	20.74	67.59
Fragilaria sp.	625	0	3.34	6.32	5.19	72.78
Pseudanabaena sp.	600	0	3.31	6.49	5.13	77.91
Amphiprora  constricta	450	0	2.48	5.74	3.85	81.76
Guinardia sp.	33.33	300	1.47	5.1	2.29	84.05
Anabaenasp.	300	41.67	1.42	5.79	2.21	86.26
Pinnularia sp.	250	0	1.41	2.81	2.18	88.44
Amphora sp.	100	300	1.09	4.25	1.69	90.13