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Recent patterns in potential phytoplankton limitation along the Northwest European continental coast Loebl, M.; Colijn, F.; van Beusekom, J.E.E.; Baretta-Bekker, J.G.; Lancelot, C.; Philippart, C.J.M.; Rousseau, V.; Wiltshire, K.H. (2009). Recent patterns in potential phytoplankton limitation along the Northwest European continental coast. J. Sea Res. 61(1-2): 34-43. dx.doi.org/10.1016/j.seares.2008.10.002 In: Journal of Sea Research. Elsevier/Netherlands Institute for Sea Research: Amsterdam; Den Burg. ISSN 1385-1101; e-ISSN 1873-1414

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Beschikbaar in	Auteurs
VLIZ: Open Marine Archive 211761 [ download pdf ]

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Trefwoorden

Aquatic communities > Plankton > Phytoplankton Environmental effects > Light effects Environmental factors > Anthropogenic factors Eutrophication Growth rate Irradiance Limiting factors Nutrients (mineral) Time series ANE, België, Belgische kust [Marine Regions]; ANE, Northern Wadden Sea [Marine Regions] Marien/Kust

Author keywords

Time Series; Eutrophication; Phytoplankton; Nutrients; Growth Limitation

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Auteurs		Top
Loebl, M. Colijn, F. van Beusekom, J.E.E. Baretta-Bekker, J.G.	Lancelot, C. Philippart, C.J.M. Rousseau, V. Wiltshire, K.H.

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Abstract

The European coastal zone is characterized by high anthropogenic riverine nutrient loads, and turbid waters along the continental North Sea coastal stretch. Riverine nutrient inputs (N and P) have increased since the 1950's and have decreased again since the mid 1980's. Using the approach of Cloern (Cloern, J.E., 1999. Aquatic Ecology 33, 3–16), we analyzed potential limitation patterns of light and nutrients (DIN, PO4, Si) for seven long-term monitoring stations along the North Sea coast. As available, data from 1990 until 2005 were analyzed. Underwater irradiance was the dominant factor potentially limiting phytoplankton growth. Seasonal limitation patterns strongly differed between the investigated sites. Si limitation was the most common among the stations followed by PO4 limitation. Only one station with optimum light conditions (northern Wadden Sea) resulted a potential DIN limitation. An increase in nutrient limitation, or co-limitation of light and nutrients, was observed off the Dutch coast (DIN and PO4), and in the German Bight near Helgoland (DIN, PO4, Si) within the period from 1990 until 2005. However, we observed no clear effects of nutrient reduction measures in shallow areas of the Wadden Sea during the period studied. We conclude that long-term nutrient limitation patterns are consistent and site dependent, and strongly linked to the local hydrography and light conditions of the water column.

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