Di Cioccio, Davide (2015) Ecology of the toxic dinoflagellate Ostreopsis cf. ovata along the coasts of the Campania region (Tyrrhenian Sea, Mediterranean Sea). [Tesi di dottorato]


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Item Type: Tesi di dottorato
Lingua: English
Title: Ecology of the toxic dinoflagellate Ostreopsis cf. ovata along the coasts of the Campania region (Tyrrhenian Sea, Mediterranean Sea)
Di Cioccio, Davidedavdicioccio@gmail.com
Date: 31 March 2015
Number of Pages: 124
Institution: Università degli Studi di Napoli Federico II
Department: Medicina Molecolare e Biotecnologie Mediche
Scuola di dottorato: Scienze veterinarie per la produzione e la sanità
Dottorato: Organismi modello nella ricerca biomedica e veterinaria
Ciclo di dottorato: 27
Coordinatore del Corso di dottorato:
de Girolamo, Paolodegirola@unina.it
Zingone, AdrianaUNSPECIFIED
Date: 31 March 2015
Number of Pages: 124
Uncontrolled Keywords: Ostreopsis; harmful algal blooms; ecology; dinoflagellates;
Settori scientifico-disciplinari del MIUR: Area 05 - Scienze biologiche > BIO/07 - Ecologia
Aree tematiche (7° programma Quadro): SALUTE e TUTELA DEL CONSUMATORE > Sicurezza alimentare, salute degli animali, benessere e salute degli animali e delle piante
AMBIENTE (INCLUSO CAMBIAMENTO CLIMATICO) > Proteggere i cittadini dai rischi ambientali
Date Deposited: 10 Apr 2015 05:48
Last Modified: 01 Oct 2015 17:20
URI: http://www.fedoa.unina.it/id/eprint/10371
DOI: 10.6092/UNINA/FEDOA/10371


Blooms of the toxic dinoflagellate Ostreopsis genus are a recurrent phenomenon in tropical and temperate regions worldwide. The most widely distributed species in the Mediterranean Sea, Ostreopsis cf. ovata, produces blooms with increasing intensity, frequency and distribution. These blooms have been associated with respiratory problems and skin irritations in humans, causing health problems along Italian coasts. In addition, palytoxin-like substances produced by this species can be accumulated by various organisms and make the seafood toxic, with further risks to human health. This thesis is based on the analysis of a multiannual dataset gathered at different coastal sites along the Campania region: 1) the area of Posillipo, in the Gulf of Naples, where the most intense blooms of O. cf. ovata for the Campania Region are regularly recorded; 2) the Ischia Island coasts, which are subjected to natural acidification due to the presence of volcanic vents; 3) the sandy littoral of the Gulf of Salerno littoral, where O. cf. ovata has not been found previously, and where structures for the defence from coastal erosion will be built. Results showed that: i) Ostreopsis cf. ovata blooms are a stable phenomenon, occurring at regular frequency over the years in summer months along Posillipo and Ischia Island coasts; ii) the blooms show a marked seasonality, with peaks in the summer months, thus representing a risk for people during the bathing season, either through direct contact and aerosol or following the consumption of contaminated seafood; iii) based on the results from the Ischia island, a lower pH does not affect Ostreopsis blooms, meaning no risk decrease in future scenarios of ocean acidification; iv) Ostreopsis does occur in the Gulf of Salerno, although at low concentrations, probably due to the absence of a suitable substrate; by providing a hard substrate for macroalgae hosting Ostreopsis blooms, artificial structures against coastal erosion might determine an increase of the species in an area where it has not represented a risk so far. The present study highlights the relevance of appropriate strategies for monitoring Ostreopsis blooms. Knowledge and data obtained can be used for a better assessment and interpretation of these phenomena, thus supporting informed management actions to protect the environment, seafood resources and human health.

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