| Título: | Descriptors from Posidonia oceanica (L.) Delile meadows in coastal waters of Valencia, Spain, in the context of the EU Water Framework Directive |
| Autores: |
Fernández Torquemada, Yolanda Díaz Valdés, Marta Colilla, Francisco Luna i Pérez, Beatriz Sánchez Lizaso, José Luis Ramos Esplá, Alfonso Ángel |
| Fecha: |
2009-02-10 2009-02-10 2007-12 2008-09 |
| Publicador: | RUA Docencia |
| Fuente: |
 |
| Tipo: | info:eu-repo/semantics/article |
| Tema: |
Biological quality element Descriptors Posidonia oceanica Seagrass Water Framework Directive Biología Marina |
| Descripción: |
Evaluations are provided of 21 descriptors of Posidonia oceanica meadows along the coast of Valencia, Spain, with a view to using these in implementing the European Water Framework Directive (WFD). The descriptors selected are known to respond to a variety of anthropogenic disturbances. Data were collected at 17 locations during three consecutive years. A principal components analysis was used to classify the ecological status of each locality according to five classes as prescribed by the WFD. To identify the descriptors
that contributed most to similarity among localities within each class and to dissimilarity between adjacent classes, a similarity percentage analysis was performed. We also correlated the descriptors with an independent set of indicators for various types of
anthropogenic pressures on the water bodies associated with the different localities. The descriptors providing the most consistent information on status as well as demonstrating a significant relationship with estimated pressures were: shoot density, shoot foliar surface, dead-matte cover, meadow cover, herbivore pressure, rhizome baring/burial, foliar necrosis, percentage of plagiotropic rhizomes, and leaf-epiphyte biomass. The study was financed by the Conselleria de Medi Ambient, Aigua, Urbanisme i Habitatge of the Generalitat Valenciana. |
| Idioma: | Inglés |
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