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| The seasonal dynamics of benthic (micro) organisms and extracellular carbohydrates in an Intertidal mudflat and their effect on the concentration of suspended sediment De Deckere, E.M.G.T.; Kornman, B.A.; Staats, N.; Termaat, G.R.; De Winder, B.; Stal, L.J.; Heip, C.H.R. (2002). The seasonal dynamics of benthic (micro) organisms and extracellular carbohydrates in an Intertidal mudflat and their effect on the concentration of suspended sediment, in: Winterwerp, J.C. et al. (Ed.) Fine sediment dynamics in the marine environment. Proceedings in Marine Science, 5: pp. 429-440
In: Winterwerp, J.C.; Kranenburg, C. (Ed.) (2002). Fine sediment dynamics in the marine environment. Proceedings in Marine Science, 5. Elsevier: Amsterdam. ISBN 0-444-51136-9. XV, 713 pp., meer
In: Proceedings in Marine Science. Elsevier: New York. ISSN 1568-2692; e-ISSN 2352-2860, meer
Is gerelateerd aan: De Deckere, E.M.G.T.; Kornman, B.A.; Staats, N.; Termaat, G.R.; De Winder, B.; Stal, L.J.; Heip, C.H.R. (2002). The seasonal dynamics of benthic (micro) organisms and extracellular carbohydrates in an Intertidal mudflat and their effect on the concentration of suspended sediment, in: de Deckere, E.M.G.T. (2003). Faunal influence on sediment stability in intertidal mudflats. NIOO Thesis, 20: pp. 81-90, meer
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The seasonal pattern was studied most intensively during 1996. Monthly sampling was done on the Heringsplaat, The flat was covered with ice during March. This period was followed by a clear water phase during spring and an increase of the silt content at the edge of the Heringsplaat. During this period an increase was found of chlorophyll-a concentration and of the carbohydrate concentration. This carbohydrate secretion stabilized the sediment. This finally resulted in a stable diatom mat at the end of the spring and a two-centimeter thick layer of silt. During June a high increase of nematodes and Corophium volutator was found. Nematode density was about 5000 ind per 10 cm2 during June and July and Corophium density reached almost 100,000 per m2. The diatom population decreased rapidly during June. It is assumed that this is caused by high grazing pressure of the nematodes and of Corophium. The reduced diatom concentration and the increased bioturbation activity of Corophium resulted in reduced sediment stability. The silt content of the sediment surface at the edge of the Heringsplaat reduced and at the same time the turbidity in the water column increased. |
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