Effects of intensive mariculture on sediment biochemistry (Articolo in rivista)

Type
Label
  • Effects of intensive mariculture on sediment biochemistry (Articolo in rivista) (literal)
Anno
  • 2007-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1890/06-2028.1 (literal)
Alternative label
  • Antonio Pusceddu ; Simonetta Fraschetti; Simone Mirto; Marianne Holmer; Roberto Danovaro (2007)
    Effects of intensive mariculture on sediment biochemistry
    in Ecological applications
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Antonio Pusceddu ; Simonetta Fraschetti; Simone Mirto; Marianne Holmer; Roberto Danovaro (literal)
Pagina inizio
  • 1366 (literal)
Pagina fine
  • 1378 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 17 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo
  • 5 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Department of Marine Science, Polytechnic University of Marche, Via Brecce Bianche, 60131 Ancona, Italy Department of Biological and Environmental Science and Technology, University of Lecce, Provinciale Lecce-Monteroni, 73100 Lecce, Italy Institute of Biology, University of Southern Denmark, Campusvej 55, DK-5230 Odense M, Denmark (literal)
Titolo
  • Effects of intensive mariculture on sediment biochemistry (literal)
Abstract
  • The exponential growth of off-shore mariculture that has occurred worldwide over the last 10 years has raised concern about the impact of the waste produced by this industry on the ecological integrity of the sea bottom. Investigations into this potential source of impact on the biochemistry of the sea floor have provided contrasting results, and no compelling explanations for these discrepancies have been provided to date. To quantify the impact of fish-farm activities on the biochemistry of sediments, we have investigated the quantity and biochemical composition of sediment organic matter in four different regions in the temperate-warm Mediterranean Sea: Akrotiri Bay (Cyprus), Sounion Bay (Greece), Pachino Bay (Italy) and Gulf of Alicante (Spain). In these four study regions, the concentrations of phytopigments, proteins, carbohydrates and lipids in the sediments were measured, comparing locations receiving wastes from fish farms to control locations in two different habitats: seagrass beds and soft non-vegetated bottoms. Downward fluxes were also measured in all of the regions, up to 200 m from the fish farms, to assess the potential spatial extent of the impact. In all four regions, with the exception of seagrass sediments in Spain, the biochemistry of the sediments showed significant differences between the control and fish-farm locations. However, the variables explaining the differences observed varied among the regions and between habitats, suggesting idiosyncratic effects of fish-farm waste on the biochemistry of sediments. These are possibly related to differences in the local physico-chemical variables that could explain a significant proportion of the differences seen between the control and fish-farm locations. Biodeposition derived from the fish farms decreased with increasing distance from the cages, but with different patterns in the four regions. Our results indicate that quantitative and qualitative changes in the organic loads of the sediments that arise from intensive aquaculture are dependent upon the ecological context and are not predictable only on the basis of fish-farm attributes and hydrodynamic regimes. Therefore, the siting of fish farms should only be allowed after a case-by-case assessment of the ecological context of the region, especially in terms of the organic matter load and its biochemical composition. (literal)
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