Ecology ofOstreopsiscf.ovataBlooms in the Northwestern Adriatic Sea
Authors:
- Stefano AccoroniStefano Accoroni
- Federica ColomboFCFederica Colombo
- Salvatore PichierriSPSalvatore Pichierri
- Tiziana RomagnoliTRTiziana Romagnoli
- Mauro MariniMMMauro Marini
- Cecilia BattocchiCBCecilia Battocchi
- Antonella PennaAPAntonella Penna
- Cecilia TottiCTCecilia Totti
- 1 May 2012
- journal article
- Published by Museum National d'Histoire Naturelle, Paris, France in Cryptogamie, Algologie
- Vol. 33 (2) , 191-198
Abstract
The ecology of Ostreopsis cf. ovata blooms was investigated to evaluate the role of environmental factors (temperature, hydrodynamism, nutrient concentrations, depth and substratum) on the bloom dynamics. This paper reports the present knowledge on O. cf. ovata blooms along the Conero Riviera (NW Adriatic Sea), on the basis of samplings carried out from 2006 to 2010. The annual maximum of benthic cell abundance was always observed in late-summer, reaching the order of magnitude of 106 cells g-1 fw (corresponding to 107 cells g-1 dw and 104 cells cm-2) on macrophyte samples. Comparing the mean abundances settled on seaweeds with those growing on hard substrata, significantly higher abundances were observed on the latter. Hydrodynamism plays a major role in Ostreopsis blooms, as significantly higher abundances were observed in sheltered sites compared with exposed ones. The abundances of O. cf. ovata showed a marked decrease with depth. Temperature and nutrients do not seem to play an important eff...Keywords
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