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Heavy d15N in intertidal benthic algae and invertebrates in the Scheldt Estuary (The Netherlands): effect of river nitrogen inputs Riera, P.; Stal, L.J.; Nieuwenhuize, J. (2000). Heavy d15N in intertidal benthic algae and invertebrates in the Scheldt Estuary (The Netherlands): effect of river nitrogen inputs. Est., Coast. and Shelf Sci. 51(3): 365-372. http://dx.doi.org/10.1006/ecss.2000.0684 In: Estuarine, Coastal and Shelf Science. Academic Press: London; New York. ISSN 0272-7714; e-ISSN 1096-0015, meer

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Beschikbaar in	Auteurs
VLIZ: Open Marine Archive 280425 [ download pdf ]

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Trefwoorden

Algae Algae > Diatoms ANE, Netherlands, Westerschelde Aquatic communities > Benthos Aquatic communities > Benthos > Phytobenthos Aquatic communities > Benthos > Zoobenthos Aquatic organisms > Marine organisms > Aquatic animals > Marine invertebrates Benthic algae Chemical elements > Nonmetals > Atmospheric gases > Nitrogen Environmental factors > Anthropogenic factors Environments > Aquatic environment > Marine environment > Intertidal environment Eutrophication Fauna > Aquatic organisms > Aquatic animals > Shellfish > Marine organisms > Marine crustaceans Food webs Food webs > Food chains Inflow > River discharge Nutrients (mineral) Particulates > Suspended particulate matter Pollution > Water pollution > Brackishwater pollution Pollution effects Suspended organic matter Water bodies > Coastal waters > Coastal landforms > Coastal inlets > Estuaries Westerschelde [Marine Regions] Marien/Kust; Brak water; Zoet water

Author keywords

benthic invertebrates; primary producers; isotope ratios; nitrogen; Scheldt Estuary

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Auteurs		Top
Riera, P. Stal, L.J. Nieuwenhuize, J.

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Abstract

The study investigated d 15N in the intertidal benthic food webs from the middle Westerschelde Estuary and the middle Oosterschelde. Much heavier d 15N values were observed for the main benthic primary producers and invertebrates in the Westerschelde Estuary. In the Oosterschelde, mean d 15N values ranged from 1.4 to 7.3ppt for SOM and suspended POM, respectively, to 6.3 to 9.1ppt for Fucus vesiculosus and benthic diatoms, respectively. Mean d 15N values in benthic invertebrates ranged from 9.7ppt for Gammarus locusta to 15.4ppt for Tubificoides sp. In the Westerschelde Estuary, mean d 15N increased from 8.1 to 8.6ppt for suspended POM and SOM, respectively, to heavier d 15N from 15.9 to 28.5ppt for F. vesiculosus and benthic diatoms, respectively. Mean d 15N for intertidal invertebrates ranged from 18.1ppt for Lumbricillus sp. to 20.7ppt for Eulimnogammarus obtusatus. Higher enrichment in 15N in benthic primary producers and invertebrates from the Westerschelde Estuary are most likely due to the incorporation of 15N-enriched DIN carried by the Scheldt River by benthic algae and, then by benthic consumers. These results point to the fact that d 15N in benthic estuarine food webs may respond directly to anthropogenic nitrogen inputs delivered into estuaries by rivers which drain highly urbanized areas.

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