engleski

Heribaudiella fluviatilis (Areschoug) Svedelius – first freshwater brown macroalga recorded in Croatia

The monitoring of macrophytes in Croatian freshwaters, conducted during the period 2009- 2017, resulted with the large amount of new data of the occurrence, composition and abundance of water vegetation. It also provided a systematic insight into the poorly studied groups, among which freshwater macroalgae can be highlighted. In addition, for the first time, the freshwater brown macroalga Heribaudiella fluviatilis was recorded on four localities in the Dinaric ecoregion. The brown alga was firstly recorded in 2017, at the mouth of the Loskun stream into the Una River, provoking the subsequent review of the material from ZA herbarium collection. The revision revealed that the alga was already collected in the Cetina River in 2009, and in two locations in the Kupa River during 2017. The species was unrecognized until now because of its inconspicuous, brown crusty talus, and also because the research protocols of the freshwater monitoring project include only members of Characeae. This paper provides the detailed micro-diagnostic characteristics of H. fluviatilis and the description of the corresponding habitat, with the physico- chemical preferences and the associated water vegetation.

Phaeophyta, freshwater, first record, Croatia

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