Comparative analysis of food webs based on flow networks: Effects of nutrient supply on structure and function of coastal plankton communities

Información del proyecto

COMWEB

Identificador del acuerdo de subvención: MAS3960052

Proyecto cerrado

Fecha de inicio 1 Mayo 1996

Fecha de finalización 30 Abril 1999

Financiado con arreglo a

• Specific programme of research and technological development in the field of marine science and technology, 1994-1998

Coste total

Sin datos

Aportación de la UE

Sin datos

Coordinado por

NORWEGIAN UNIVERSITY OF SCIENCE AND TECHNOLOGY
Norway

CORDIS proporciona enlaces a los documentos públicos y las publicaciones de los proyectos de los programas marco HORIZONTE.

Los enlaces a los documentos y las publicaciones de los proyectos del Séptimo Programa Marco, así como los enlaces a algunos tipos de resultados específicos, como conjuntos de datos y «software», se obtienen dinámicamente de OpenAIRE .

Resultado final

Conceptual framework for a generalised response term of a integrated unified management model for nutrient emission to European coastal waters and the general structure of such an integrated model

Summary: COMWEB has through the comparative studies provided considerably further insight into the mechanisms behind coastal eutrophication. The analysis of pelagic flow networks provided a conceptual platform diagnostic criteria for state and quality assessment of coastal waters. Rate estimates related better to nutrient loading rates than concentration of biotic compartments, whereas biomass related better to total nutrient concentrations. Primary production, mesozooplankton grazing and growth, fraction of primary production consumed by grazers, bacterial production relative to primary production, cycling indices, and path lengths were all well related to nutrient loading rate. Autotrophic biomass, ratio of autotrophic to heterotrophic biomass, and fraction of pico-cyanobacteria of the total autotrophic biomass were all well related to total nutrients. These variables have the potential of becoming unified response functions in an integrated management model for nutrient emission to European coastal waters. The short-term effects of nutrient perturbations were proportional to the dose added, and an upper critical level of nutrient loading for the integrity of the food web was 1 µmol N litre-1 day-1. The value is only valid for the short-term effects. The seasonal response of the open NE Atlantic system was lower and non-linear.

Publicaciones

Other (1)

Marine science and technology (MAST III) 1994-98: Coastal ecosystems (Eloise)

Autores: CEC (CEC Bruxelles (BE))
Publicado en: EUR 17785 EN (1998) 15pp., ECU 7.00, 1998, Página(s) 15, ISBN 92-828-2312-1