Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 535689
Title Responses of summer phytoplankton biomass to changes in top-down forcing: Insights from comparative modelling
Author(s) Maar, Marie; Butenschön, Momme; Daewel, Ute; Eggert, Anja; Fan, Wei; Hjøllo, Solfrid S.; Hufnagl, Marc; Huret, Martin; Ji, Rubao; Lacroix, Geneviève; Peck, Myron A.; Radtke, Hagen; Sailley, Sévrine; Sinerchia, Matteo; Skogen, Morten D.; Travers-Trolet, Morgane; Troost, Tineke A.; De Wolfshaar, Karen Van
Source Ecological Modelling 376 (2018). - ISSN 0304-3800 - p. 54 - 67.
DOI https://doi.org/10.1016/j.ecolmodel.2018.03.003
Department(s) IMARES Onderzoeksformatie
Publication type Refereed Article in a scientific journal
Publication year 2018
Keyword(s) Plankton functional types - Trophic cascades - Zooplankton mortality - Phytoplankton - ensemble modelling
Abstract The present study describes the responses of summer phytoplankton biomass to changes in top-down forcing (expressed as zooplankton mortality) in three ecosystems (the North Sea, the Baltic Sea and the Nordic Seas) across different 3D ecosystem models. In each of the model set-ups, we applied the same changes in the magnitude of mortality (±20%) of the highest trophic zooplankton level (Z1). Model results showed overall dampened responses of phytoplankton relative to Z1 biomass. Phytoplankton responses varied depending on the food web structure and trophic coupling represented in the models. Hence, a priori model assumptions were found to influence cascades and pathways in model estimates and, thus, become highly relevant when examining ecosystem pressures such as fishing and climate change. Especially, the different roles and parameterizations of additional zooplankton groups grazed by Z1, and their importance for the outcome, emphasized the need for
better calibration data. Spatial variability was high within each model indicating that physics (hydrodynamics and temperature) and nutrient dynamics also play vital roles for ecosystem responses to top-down effects. In conclusion, the model comparison indicated that changes in top-down forcing in combination with the modelled food-web structure affect summer phytoplankton biomass and, thereby, indirectly influence water quality of the systems.
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