Gongolaria barbata forest in the shallow lagoon on the southern Istrian Coast (northern Adriatic Sea).

These results match with the condition of I G. barbata i thalli during the extremely warm temperatures in the S'cuza lagoon, where temperatures can exceed 30 °C and reach up to 34 °C up to several days. In this study considerable differences were found between the main morphological features of the two forms of I G. barbata i thalli compared with I G. barbata i thalli at the same depth from the central part of the Istrian Coast ([28]). Graph: Figure 2: Thallus of Gongolaria barbata: (A) Attached thallus on a pebble; (B) detached thallus with the holdfast; (C) detached thallus without a holdfast. Keywords: attached form; detached form; Gongolaria barbata; lagoon; northern Adriatic EN attached form detached form Gongolaria barbata lagoon northern Adriatic 255 268 14 08/09/22 20220801 NES 220801 1 Introduction Fucalean species in the Mediterranean Sea are mainly represented by members of the genera I Cystoseira i , I Ericaria i and I Gongolaria i ([2]; [3]; [4]; [24]; [25]; [34]; [51]). [Extracted from the article]