The genus Potamogeton L. includes submerged or floating perennial hydrophytes. Globally, botanists discuss up to 120 species. In the Romanian Flora, volume XI (eds. SĂVULESCU & NYÁRÁDY, 1966) there are described 15 species. CIOCÂRLAN (2009) and SÂRBU et al. (2013) present 15 confirmed species and 2 unconfirmed for Romania. Over time, in Banat (with reference especially from Timiş and Caraş-Severin counties), we found reports about several species of Potamogeton. The studies belong mainly to (TÖKES, 1905), SORAN (1954, 1956), BOȘCAIU (1966), GRIGORE (1971), COSTE (1974), VICOL (1974), OPREA et al. (1974), ARVAT (1977), ARSENE et al. (in STĂNESCU, 2005), MATACĂ (2005), NEACŞU (2008). Some of these species, as Potamogeton compressus and Potamogeton obtusifolius are no longer reconfirmed in the field, due to the reduction or disappearance of some wet zones. The weight of the common species of Potamogeton (like Potamogeton crispus and Potamogeton natans) in the structure of the aquatic vegetation is significant and it indicates, from an ecological point of view, the eutrophication, an obvious phenomenon in the Lake Sânandrei (Timiş county), which we studied (NEACŞU, 2008). SÎRBU & OPREA (2011) do not mention any species of Potamogeton as invasive for our country. On the other hand, CIOCÂRLAN (2009) and SÂRBU et al. (2013) maintain in their list a rare species, Potamogeton coloratus (cited from Mehedinţi county). The distribution of this species was considered uncertain in the old flora of our country (1952-1976).

Potamogeton, wet zones, Romanian Banat

biology

Presentation: poster