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First record and distribution of Uronema marinum (Chaetophorales, Chlorophyta) in the north-western lagoons of the Adriatic Sea, Mediterranean Sea (Italy)

October 1, 2013

Morphology and reproductive features led us to report the occurrence of the alien macroalgal species Uronema marinum in the Mediterranean Sea. It was in summer 2012 that U. marinum was identified  for the first time in the lagoon of Venice, in the lagoons and ponds of the Po Delta and  in Pialassa della Baiona  in Emilia-Romagna, even though it has been present since 2008, at least. That species, native of the Pacific Ocean and probably imported with  the Manila clam Tapes philippinarum is prevalently associated to thalli of the alien species Agardhiella subulata and the invasive Gracilaria vermiculophylla,  which have the same origin and have recently colonized the lagoons.  Uronema marinum is currently widespread in the whole lagoon surfaces,  but it is in stagnant and confined areas rich in nutrient, and where Gracilariaceae and Solieriaceae prevail on Ulvaceae due to the high turbidity of the water, that it is particularly abundant.

 

Sfriso A, Buosi A, Sfriso A A, in press, First record and distribution of Uronema marinum (Chaetophorales, Chlorophyta) in the north-western lagoons of the Adriatic Sea, Mediterranean Sea (Italy), Mediterranean Marine Science, 2013, doi:10.12681/mms.517. Article (subscription required).

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