Zoeken
Zoeken kan via de modus 'eenvoudig zoeken' (één veld) of uitgebreid via 'geavanceerd zoeken' (meerdere velden). Zo kan je bv. zoeken op een combinatie van een auteursnaam (auteur), een jaartal (jaar) en een documenttype.
Boekenmand
Nuttige resultaten kan je aanvinken en toevoegen aan een mandje. De inhoud hiervan kan je exporteren of afdrukken (naar bv. PDF).
RSS
Op de hoogte blijven van nieuw toegevoegde publicaties binnen uw interessegebied? Dit kan door een RSS-feed (?) te maken van jouw zoekopdracht.
nieuwe zoekopdracht
Comparative assessment of large-scale marine eutrophication: North Sea area and Adriatic Sea as case studies
Druon, J.N.; Schrimpf, W.; Dobricic, S.; Stips, A. (2004). Comparative assessment of large-scale marine eutrophication: North Sea area and Adriatic Sea as case studies. Mar. Ecol. Prog. Ser. 272: 1-23. https://dx.doi.org/10.3354/meps272001
In: Marine Ecology Progress Series. Inter-Research: Oldendorf/Luhe. ISSN 0171-8630; e-ISSN 1616-1599, meer
|   |
| Author keywords |
Marine eutrophication · Physical sensitivity · Hydromorphology · Oxygen deficiency · Environmental tool · Optical remote-sensing · Numerical modelling · Adriatic Sea · North Sea area Sea area |
| Auteurs | | Top |
- Druon, J.N.
- Schrimpf, W.
- Dobricic, S.
- Stips, A.
|
|
|
| Abstract |
In the last 50 yr, marginal seas under freshwater influence have become affected by eutrophication. The large areas involved render its assessment difficult. In this paper, a spatial and comparative approach is presented assuming that hydromorphology together with organic matter production control the various consequences of nutrient overenrichment. We have developed 2 eutrophication indices of shallow marine ecosystems using hydrodynamic modelling and optical satellite remote-sensing. The indices are tested in systems characterised by contrasting physical regimes, i.e. the Adriatic and North Sea. The physically sensitive area index (PSA) integrates the supporting factors of eutrophication, i.e. the physical conditions driving primary production in the upper layer and oxygen availability near the bottom. The eutrophication risk index (EUTRISK) characterises the spatial distribution of potential hypoxia at a monthly timescale. It is based on an oxygen budget between the physical capacity to store and renew the oxygen near the seabed and the flux of organic matter reaching the sediment, estimated primarily from satellite-derived chlorophyll a data. The indices identify 3 main types of eutrophicated waters: (1) eutrophic and sensitive, (2) mesotrophic and sensitive and (3) eutrophic and resistant. In Category 1 oxygen depletion occurs recurrently because both the main pressure and supporting factors are unfavourable (e.g. coastal waters south of the Po river mouth). In Category 2, severe hypoxia or anoxia occur due to particularly adverse physical conditions, even when primary production is relatively low (e.g. the Kattegat and NE part of the northern Adriatic Sea). Category 3 comprises areas where severe hypoxia near the seabed is prevented by permanent tidally induced vertical mixing; however nutrient overenrichment is recognised as leading to alterations in the food-web structure and functioning (e.g. Bay of Seine). The EUTRISK index forms the basis of a comparative tool for the assessment and monitoring of marine eutrophication risk. The PSA index, which provides an understanding of physical vulnerability on a large scale, indicates the relative threshold of nutrient discharge, i.e. the assimilative capacity of marine ecosystems. This first assessment of the underlying processes controlling marine eutrophication is a prerequisite for efficient restoration strategies on a large scale. |
IMIS is ontwikkeld en wordt gehost door het VLIZ.
