Comparing food web structures and dynamics across a suite of global marine ecosystem models Sailley, Sevrine F. Vogt, Meike Doney, Scott C. Aita, M. N. Bopp, Laurent Buitenhuis, Erik T. Hashioka, Taketo Lima, Ivan D. Le Quere, Corinne Yamanaka, Yasuhiro 2015-04-21T20:23:56Z 2015-04-21T20:23:56Z 2013-05-16
dc.description © The Author(s), 2013. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Ecological Modelling 261-262 (2013): 43–57, doi:10.1016/j.ecolmodel.2013.04.006. en_US
dc.description.abstract Dynamic Green Ocean Models (DGOMs) include different sets of Plankton Functional Types (PFTs) and equations, thus different interactions and food webs. Using four DGOMs (CCSM-BEC, PISCES, NEMURO and PlankTOM5) we explore how predator–prey interactions influence food web dynamics. Using each model's equations and biomass output, interaction strengths (direct and specific) were calculated and the role of zooplankton in modeled food webs examined. In CCSM-BEC the single size-class adaptive zooplankton preys on different phytoplankton groups according to prey availability and food preferences, resulting in a strong top-down control. In PISCES the micro- and meso-zooplankton groups compete for food resources, grazing phytoplankton depending on their availability in a mixture of bottom-up and top-down control. In NEMURO macrozooplankton controls the biomass of other zooplankton PFTs and defines the structure of the food web with a strong top-down control within the zooplankton. In PlankTOM5, competition and predation between micro- and meso-zooplankton along with strong preferences for nanophytoplankton and diatoms, respectively, leads to their mutual exclusion with a mixture of bottom-up and top-down control of the plankton community composition. In each model, the grazing pressure of the zooplankton PFTs and the way it is exerted on their preys may result in the food web dynamics and structure of the model to diverge from the one that was intended when designing the model. Our approach shows that the food web dynamics, in particular the strength of the predator–prey interactions, are driven by the choice of parameters and more specifically the food preferences. Consequently, our findings stress the importance of equation and parameter choice as they define interactions between PFTs and overall food web dynamics (competition, bottom-up or top-down effects). Also, the differences in the simulated food-webs between different models highlight the gap of knowledge for zooplankton rates and predator–prey interactions. In particular, concerted effort is needed to identify the key growth and loss parameters and interactions and quantify them with targeted laboratory experiments in order to bring our understanding of zooplankton at a similar level to phytoplankton. en_US
dc.description.sponsorship This work was supported with funding from Palmer LTER (NSF OPP-0823101) and C-MORE (NSF EF-0424599). en_US
dc.format.mimetype application/pdf
dc.identifier.citation Ecological Modelling 261-262 (2013): 43–57 en_US
dc.identifier.doi 10.1016/j.ecolmodel.2013.04.006
dc.language.iso en_US en_US
dc.publisher Elsevier en_US
dc.rights Attribution 3.0 Unported *
dc.subject Dynamic Green Ocean Model en_US
dc.subject Plankton Functional Types en_US
dc.subject Zooplankton en_US
dc.subject Food web dynamic en_US
dc.subject Predator–prey interactions en_US
dc.title Comparing food web structures and dynamics across a suite of global marine ecosystem models en_US
dc.type Article en_US
dspace.entity.type Publication
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