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Effect of continuous nutrient enrichment on microalgae colonizing hard substrates Hillebrand, H.; Sommer, U. (2000). Effect of continuous nutrient enrichment on microalgae colonizing hard substrates, in: Liebezeit, G. et al. Life at Interfaces and Under Extreme Conditions: Proceedings of the 33rd European Marine Biology Symposium, Wilhelmshaven, Germany, 7-11 September 1998. Developments in Hydrobiology, 151: pp. 185-192. https://dx.doi.org/10.1007/978-94-011-4148-2_18 In: Liebezeit, G.; Dittmann, S.; Kröncke, I. (Ed.) (2000). Life at interfaces and under extreme conditions: Proceedings of the 33rd European Marine Biology Symposium, Wilhelmshaven, Germany, 7-11 September 1998. European Marine Biology Symposia, 33. Developments in Hydrobiology, 151. ISBN 978-0-7923-6468-9; e-ISBN 978-94-011-4148-2. VII, 210 pp. https://dx.doi.org/10.1007/978-94-011-4148-2 In: European Marine Biology Symposia. Is gerelateerd aan: Hillebrand, H.; Sommer, U. (2000). Effect of continuous nutrient enrichment on microalgae colonizing hard substrates. Hydrobiologia 426: 185-192. https://dx.doi.org/10.1023/A:1003943201178, meer

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Documenttype: Congresbijdrage

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Trefwoorden

Algae Nutrients (mineral) Substrata Marien/Kust

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Auteurs		Top
Hillebrand, H. Sommer, U.

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Abstract

In order to understand the effect of changing nutrient conditions on benthic microalgae on hard substrates, in situ experiments with artificial substrates were conducted in Kiel Fjord, Western Baltic Sea. As an extension of previous investigations, we used artificial substrates without silicate and thus were able to supply nutrient media with different Si:N ratios to porous substrates, from where they trickled out continuously. The biofilm developing on these substrates showed a significant increase in biovolume due to N + P enrichment, while Si alone had only minor effects. The stoichiometric composition of the biomass indicated nitrogen limitation during most of the year. The C:N ratios were lowered by the N + P addition. The algae were dominated by diatoms in most cases, but rhodophytes and chlorophytes also became important. The nutrient treatment affected the taxonomic composition mostly at the species level. The significance of the results with regard to coastal eutrophication is discussed.

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