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Preliminary data on the impact facilities on Posidonia oceanica Mediterranean of fish far & ng meadows in the
| Content Provider | Semantic Scholar |
|---|---|
| Author | Gkrard Pergent Méndez, P. Christine Pergentmartini Vanina Pasqualini |
| Copyright Year | 2003 |
| Abstract | While the extension of aquaculture along the coasts of the Mediterranean islands is today an economic priority, no data is available on the impact of these facilities on the littoral environment in general, and in particular on the Posidonia oceanica meadows that are responsible for the richness and diversity of these biotopes. The impact of fish farming facilities in the marine littoral environment is assessed at three Mediterranean sites in Corsica and Sardinia. Various parameters are considered: (i) the amount of light available, (ii) the nature of the sediment, and (iii) the vitality of the Posidonia oceunicu beds. The findings confirm the impact of the aquaculture facilities within the water column (increase in turbidity, enrichment of the sediment in organic matter and nutrients), and it would appear that the Posidoniu oceanicu beds also undergo significant alterations. The decline in density of the meadows in the area influenced by aquaculture farming and their total disappearance beneath the facilities is particularly disturbing, even if the areas affected are not very extensive, at least for the smaller farms (a few hundred square metres), and if certain beneficial effects may be recorded (increase in benthic primary production). Because of its ability to record environmental alterations caused by these facilities (light, nutrients, trace metals), the Posidoniu oceunicu meadow is a good bioindicator for use in monitoring studies. 0 Elsevier, Paris / Ifremer / Cnrs / Ird aquaculture I environment/ seagrass I Posidonia oceanica I Mediterranean R&urn4 Don&s pr&ninaires sur l’impact des installations aquacoles sur les herbiers B Posidonia oceanica en M6diterranik.. L’extension des installations aquacoles le long des c&es des iles mediterraneennes est une prior&e economique, mais il n’existe pas de donnkes sur l’impact de ces installations sur le milieu littoral, en particulier sur les herbiers B Posidoniu oceanica, a l’origine de la richesse et de la diversite de ces biotopes. L’impact des fermes aquacoles, en milieu marin littoral, est 6valuC dans trois sites mCditerranCens, en Corse et en Sardaigne. Les parametres pris en compte sont la quantite de lumibe, la nature du sediment et la vitalite de l’herbier b Posidoniu oceanica. Si les resultats obtenus confirment l’impact des installations aquacoles dans la colonne d’eau (augmentation de la turbidite, enrichissement du sediment en matibre organique et nutriments), il apparait que l’herbier 2 Posidoniu oceanica subit Cgalement des modifications significatives. La diminution de densite des herbiers, dans la zone d’influence des fermes aquacoles, voire leur disparition totale sous les cages, est particulitrement inquietante meme si les zones concern&es sont peu &endues (quelques centaines de m&es) et malgre certains effets btnt%ques (augmentation de la production primaire benthique). Les modifications du milieu engendrees par ses installations (lumibre, nutriments, mttaux-traces) sont enregistrees par l’herbier h Posidoniu oceunicu qui apparait comme un bio-indicateur interessant a suivre. 0 Elsevier, Paris / Ifremer / Cnrs / Ird aquaculture I environnement I phan&ogames marines I Posidonia oceanica I MkditerranCe Oceanologica (1999) 22, 1, 95-107 0 Elsevier, Paris I lfremer I Cnrs I Ird 95 |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://portailweb.universita.corsica/stockage_public/portail/baaaatr6/files/Pergent%20et%20al.,%201999%20(Abstract).pdf |
| Alternate Webpage(s) | https://archimer.ifremer.fr/doc/00325/43631/43251.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
