| Physiological responses of the seagrass Posidonia oceanica as indicators of fish farm impact. | |
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MedLine Citation:
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PMID: 18334257 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The development of aquaculture along the Mediterranean coastline degrades the marine environment, in particular Posidonia oceanica meadows, which, in extreme cases, show high mortality. Here we studied the effects of organic matter and nutrient input from the effluents of three fish farms, located along the Mediterranean coast, on P. oceanica physiology. For this purpose, we measured physiological variables such as total nitrogen (N) content, free amino acid (FAA) concentration and composition, N stable isotope ratio (delta 15N), total phosphorus (P) content and total non-structural carbohydrate (TNC) content in plant tissues and epiphytes affected by organic discharges (highly impacted stations: HI, and less impacted stations: LI) and compared these results with those obtained in references sites (control stations: C). For all the descriptors analyzed in P. oceanica epiphytes, the values recorded in the vicinity of cages were, in general, much higher than those in C. Leaves did not respond consistently in any case. Total N content and delta 15N in epiphytes together with the total P content in rhizomes and epiphytes were the physiological descriptors that showed the most consistent responses to fish farm effluents. On the basis of these observations, we conclude that fish farm activities strongly affect the physiological parameters of nearby P. oceanica meadows. We propose that changes in these physiological parameters may be useful indicators of marine environmental degradation in studies that monitor the effects of fish farming. |
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Authors:
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Marta Pérez; Tania García; Olga Invers; Juan Manuel Ruiz |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2008-03-10 |
Journal Detail:
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Title: Marine pollution bulletin Volume: 56 ISSN: 0025-326X ISO Abbreviation: Mar. Pollut. Bull. Publication Date: 2008 May |
Date Detail:
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Created Date: 2008-05-14 Completed Date: 2008-09-23 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0260231 Medline TA: Mar Pollut Bull Country: England |
Other Details:
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Languages: eng Pagination: 869-79 Citation Subset: IM |
Affiliation:
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Departament d'Ecologia, Universitat de Barcelona Avda. Diagonal 645, 08028 Barcelona, Spain. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Alismatidae
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metabolism* Amino Acids / metabolism Animals Aquaculture* Environmental Monitoring* Fishes Greece Italy Nitrogen / metabolism Nitrogen Isotopes / metabolism Phosphorus / metabolism Plant Leaves / metabolism Plant Roots / metabolism Rhizome / metabolism Spain Waste Disposal, Fluid* |
| Chemical | |
Reg. No./Substance:
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0/Amino Acids; 0/Nitrogen Isotopes; 7723-14-0/Phosphorus; 7727-37-9/Nitrogen |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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