The gastropod Dendropoma cristatum is a biogenic engineer of the central Mediterranean, forming reefs along the lower rocky intertidal fringe with a remarkable ecological role. To understand whether reef-associated bioﬁlm cultivable bacterial and bioﬁlm ageing may trigger the settlement of the juvenile snails, a combination of laboratory techniques and ﬁeld experiments was used. Reef-associated bioﬁlm cultivable bacteria were isolated, and a settlement-choice experiment was performed in situ on artiﬁcial bioﬁlms composed of i) a mixture of six bioﬁlm-forming selected isolates, ii) all the cultivable bacteria, and iii) 13-, 23-, 32-day old bioﬁlms formed under naturalconditions. Overall,settlement ratesigniﬁcantlydiﬀeredamong bioﬁlmtreatments(p < 0.0001). A signiﬁcant positive correlation between bioﬁlm ageing and juvenile D. cristatum settlement was assessed (r=0.69 (p < 0.001), whereas the bioﬁlm bacterial composition (relatively to the cultivable fraction) did not show any eﬀect on the vermetid's settlement rate.
|Numero di pagine||8|
|Rivista||Marine Environmental Research|
|Stato di pubblicazione||Published - 2018|
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