Nutrient concentrations in the interstitial water of Lake Grevelingen sediment: effects of sediment redistribution and benthic primary production processes
Kelderman, P. (1984). Nutrient concentrations in the interstitial water of Lake Grevelingen sediment: effects of sediment redistribution and benthic primary production processes. Neth. J. Sea Res. 18(3-4): 312-336. https://dx.doi.org/10.1016/0077-7579(84)90008-5
In: Netherlands Journal of Sea Research. Netherlands Institute for Sea Research (NIOZ): Groningen; Den Burg. ISSN 0077-7579; e-ISSN 1873-1406, meer
Is gerelateerd aan:Kelderman, P. (1985). Nutrient concentrations in the interstitial water of Lake Grevelingen sediment: effects of sediment redistribution and benthic primary production processes, in: Kelderman, P. Nutrient dynamics in the sediment of Lake Grevelingen (SW Netherlands). pp. 56-80, meer
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| Abstract |
Nutrient concentrations in the interstitial water were periodically investigated at 24 permanent stations in Lake Grevelingen, a recently enclosed estuary. At the deeper stations (> 7 m) in the lake, phosphate and silicate pore water concentrations generally reach maximum values in the 0–3 cm sediment zone (typically 50 and 400 μgat·11 respectively). These maxima are caused by the mineralization of reactive sediment material, that is continuously being redistributed towards the deeper areas in the lake. At the shallow stations (< 7 m) local phosphate and silicate pore water maxima are often found of the top 0–1 or even 0-cm layer. It is probable that mineralization of microphytobenthos cells plays a dominant role here. This implies that a light dependent nutrient depletion in the upper mm, or less, of the sediment must have occurred; an effect that could not be detected with the present interstitial water sampling technique, but has indirectly been shown to take place at a field station with high microphytobenthos primary production rates.High significant seasonal trends were found for the P, Si and NH4-N pore water concentrations in the top layer at the deeper stations. Seasonal variations at the shallow stations were virtually absent; light regime, and not temperature, may be the dominant factor here. |
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