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Seasonal variations of epilithic diatoms on different hard substrates, in the northern Adriatic Sea
Totti, C.; Cucchiari, E.; De Stefano, M.; Pennesi, C.; Romagnoli, T.; Bavestrello, G. (2007). Seasonal variations of epilithic diatoms on different hard substrates, in the northern Adriatic Sea. J. Mar. Biol. Ass. U.K. 87(3): 649-658. dx.doi.org/10.1017/S0025315407054665
In: Journal of the Marine Biological Association of the United Kingdom. Cambridge University Press/Marine Biological Association of the United Kingdom: Plymouth. ISSN 0025-3154, more
Peer reviewed article

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Keyword
    Marine

Authors  Top 
  • Totti, C.
  • Cucchiari, E.
  • De Stefano, M.
  • Pennesi, C.
  • Romagnoli, T.
  • Bavestrello, G.

Abstract
    The colonization of epilithic diatoms on artificial hard substrates (marble, quartzite and slate) was investigated on a seasonal basis in a subtidal site of the northern Adriatic Sea to determine if substrate-dependent differences in colonization occurs and to define the seasonal variations of microepilithic communities in terms of abundance, biomass and community structure. Artificial substrates (smoothed small discs mounted on a Plexiglas sheet) were placed at a depth of 8 m in April 2003, July 2003, January 2004 and February 2004. The discs were collected after 6-7 weeks for counting and taxonomic identification of the diatoms. The community structure of epilithic diatoms showed a dominance of motile species over the entire study period, followed by erect, adnate and tube-dwelling diatoms. Diatom density showed a marked seasonal variability, ranging from 365±407 (winter 2004) to 557156±82602 cells cm-2 (spring 2004). Biomass ranged from 0.02±0.01 to 17.53±3.20 µg C cm-2. Abundance and biomass values did not present any significant differences for the three substrates examined.

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