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

Figure 5

Diagram of canonical correspondence analysis (CCA) showing the effects of biometric parameters of the host plant on epiphytic microalgae species and their ordination according to the first and second axes. Species whose coverage and frequency are less than 10% were eliminated. Species that were grouped with Posidonia station (P) are 10: Prorocentrum concavum, 11: Prorocentrum minimum, 12: Prorocentrum lima, 15: Nitzschia fonticola, 16: Fragilaria sp., 17: Surirella sp., 19: Diploneis sp., 21: Pleurosigma sp., 23: Pinnularia sp., 26: Amphiprora constricta, 27: Anabaena sp., and 28: Pseudanabaena sp. Species that are grouped with Cymodocea (C) station are 2: Gymnodinium sp., 3: Amphidinium carterae, 4: Gonyaulax spinifera, 5: Cyst of dinoflagellates, 6: Protoperidinium sp., 8: Coolia monotis, 13: Rhizosolenia styliformis, 18: Guinardia sp., 24: Amphora sp., 25: Nitzschia sp., 29: Coscinodiscus sp., and 30: Oscillatoria sp.