Quantitative macrophyte community data for the Gesäuse-Johnsbachtal site.

Undaria pinnatifida was observed for the first time in the Mar Piccolo in April 1998, settled on the docks near the small fishing boat harbour. A systematic campaign of measurements was carried out from December 2000 to November 2002 and from December 2006 to November 2007 to follow the development of this non-indigenous species population

Biomass data (g fw m-2) of macrophytes collected in four stations in the Mar Piccolo in the period October 2007-September 2008. Presence of species is indicated by 0,01 value In the period October 2007-September 2008, a sampling campaign was carried out in the Mar Piccolo of Taranto, to assess the biodiversity of macrophyte populations. Four coastal stations were monthly monitored, two in the First Inlet (A 40°29'30.50"N 17°14'08.29"E) (B 40°30'03.86"N 17°15'20.52"E) and two in the Second Inlet (C 40°29'38.99"N 17°19'22.87"E) (D 40°28'22.17"N 17°18'35.79"E). A total of 79 taxa were recorded: 18 Chlorophyta, 5 Ochrophyta, 54 Rhodophyta, 2 Tracheophyta. 4 species were non-indigenous (NIS). The Tracheophyta Ruppia cirrhosa was recorded for the first time in the basin.

Biomass data (g fw m-2) of macrophytes collected in 20 stations in the Mar Piccolo in the period February 1989-January 1990. Presence of species is indicated by 0,01 value In the period February 1989-January 1990, a sampling campaign was carried out in the Mar Piccolo of Taranto, to assess the biodiversity of unattached macrophyte populations. A stratified random sampling was performed in 20 stations variously distributed in the First and the Second Inlet. A total of 54 taxa were recorded: 15 Chlorophyta (included the rhizophytic Caulerpa prolifera), 5 Ochrophyta, 32 Rhodophyta, and unidentified colonial Bacillariophyta and Cyanobacteria. 3 species were non-indigenous (NIS). Considering the biogeographic element 2 species were Indo Pacific (IP), 18 species were Atlantic (A), 4 species were Mediterranean (M), 21 species were Cosmopolite (C), 4 species were Circum Tropical (CT) For the location of the stations see [Cecere E., Saracino O.D., Fanelli M., Petrocelli A. 1992 - Presence of a drifting algal bed in the Mar Piccolo basin, Taranto (Ionian Sea, Southern Italy). Journal of Applied Phycology 4: 323-327]