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| Delgado, O; Grau, A; Pou, S; Riera, F; Massuti, C; Zabala, M; Ballesteros, E. |
| A three year monitoring programme (1988-1990) of embayment habitats dominated by the seagrasses Posidonia oceanica and Cymodocea nodosa was carried out in Fornells Bay (Menorca, Western Mediterranean), where gilthead seabream (Sparus auratus) was artificially reared. Responses ranging from shoot density decrease to total seagrass demise were observed. Posidonia oceanica was more drastically and quickly affected than Cymodocea nodosa. In 1990, a total of 2 ha of seagrass were significantly degraded. Increased light attenuation, sedimentation rates, and grazing pressure are proposed as the principal factors accounting for seagrass regression. |
| Tipo: Text |
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| Ano: 1997 |
URL: http://archimer.ifremer.fr/doc/00093/20415/18082.pdf |
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| Delgado, O; Ruiz, J; Perez, M; Romero, J; Ballesteros, E. |
| The effects of fish farming on a seagrass (Posidonia oceanica) meadow at Fornells Bay, Minorca (Balearic Islands) were studied. Changes in plant and meadow features (e.g. shoot morphology, shoot density, biomass, rhizome growth, nutrient and soluble sugars concentrations...) in three stations along a transect from a disturbed (organic pollution due to fish cultures) to an undisturbed site were assessed. The fish culture had ceased in 1991; however, seagrass decline, already reported in a previous study for the period 1988-1990, was still taking place at the time of sampling (July 1994). Differences between stations were very clear; the station closest to the fish cages showed reduced shoot density, shoot size, underground biomass, sucrose concentration and... |
| Tipo: Text |
Palavras-chave: Aquaculture; Phanérogame marine; Posidonia oceanica; Eutrophisation; Caractéristique du sédiment; Aquaculture; Seagrass; Posidonia oceanica; Eutrophication; Sediment characteristics. |
| Ano: 1999 |
URL: http://archimer.ifremer.fr/doc/00325/43632/43250.pdf |
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