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The meiobenthic component of the Palude della Rosa, Lagoon of Venice

Warwick, R.M., Villano, N., Lasserre, P. and Marzollo, A. (2000) The meiobenthic component of the Palude della Rosa, Lagoon of Venice. In: The Venice Lagoon ecosystem: inputs and interactions between land and sea. United Nations Educational, Scientific and Cultural Organization, Paris, France, pp. 227-246.

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A survey of the meiofauna at 42 stations in the Palude della Rosa in 1991-1992 showed that there were two distinct associations of nematodes and total meiofauna (nematodes plus copepods), one associated with that part of the Palude where Ulva attains a high biomass, and another where Ulva biomass is low or absent. Species characteristic of the Ulva region include nematodes of the genus Diplolaimella and copepods of the genus Tisbe, both of which are known from elsewhere to be associated with decaying plant material and implicated in the decomposition process. In the Ulva region both diversity (as evidenced from k-dominance curves) and species composition (using non metric MDS) varied considerably from season to season, associated with the seasonal cycle of growth and decay of Ulva, but diversity and species composition were seasonally more stable in the non-Ulva region. For the copepods alone, differences between the Ulva and non-Ulva regions were not so evident and species composition in both regions changed seasonally in the same way, although diversity was only reduced markedly in the summer at the Ulva stations. We conclude that it is not only likely that the Ulva cycle controls seasonal changes in meiobenthic community composition, but in turn, the latter has some control over the Ulva cycle.

Item Type: Book Chapter
Publisher: United Nations Educational, Scientific and Cultural Organization
Copyright: © UNESCO 2000
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