The role of bivalves in the Balgzand: First steps on an integrated modelling approach

The role of bivalves in the Balgzand: First steps on an integrated modelling approach •An IBM (DEB) model for bivalves was coupled to an ecosystem model (MOHID).•The model was implemented in the Balgzand intertidal area in a fine resolution domain.•The Balgzand acts a sink of phytoplankton and a source of ammonia.•Spawning season is long but new cohorts are controlled by cannibalism and shrimps.•Starvation is the main mortality in biomass and cannibalism the main in numbers. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Ecological Modelling Elsevier

The role of bivalves in the Balgzand: First steps on an integrated modelling approach

The role of bivalves in the Balgzand: First steps on an integrated modelling approach

Article history: The present paper describes a process oriented modelling tool that integrates physical, biogeochemi- Received 8 November 2016 cal, ecological and physiological factors governing bivalve populated marine ecosystems. This modelling Received in revised form 29 April 2017 tool is the result of the coupling between an individual-based population model for bivalves (based on Accepted 30 April 2017 the Dynamic Energy Budgets theory, DEB) and a hydrodynamic/biogeochemical model (MOHID Water Available online 1 June 2017 Modelling System). The model was implemented in the Balgzand area (Wadden Sea, The Netherlands) in a fine resolution domain to study mussel population dynamics and to quantify the influence of mussel Keywords: communities on the pelagic system. Model results for a reference scenario (2009/2010) are in agreement Mussel bed with observations, and provide a consistent quantitative description of local hydrodynamics and biogeo- IBM chemical cycles. The Balgzand acts as a sink of phytoplankton due to bivalves’ filtration, and a source Ecosystem model of ammonia, exporting about 40% more than the input flux. These results suggest significant ammonia DEB theory regeneration. Results show that despite the long and almost continuous spawning season, only a few MOHID Balgzand cohorts are able to survive. Early stage mortality (top-down), in particular cannibalism and shrimp pre- dation, can control the persistence of new cohorts in the first month although starvation (bottom-up) represents the main cause of biomass loss in an overall. The tendency is that new mussel beds are formed in areas adjacent to already existing mussel beds and channel edges. Bivalves’ activity intensifies the seasonal patterns of food and nutrients in areas close to the mussel beds, though not changing their over- all spatial distribution. This study not only confirms but also quantifies mussels’ potential to influence ecosystem functioning due to...
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Publisher
Elsevier
Copyright
Copyright © 2017 Elsevier B.V.
ISSN
0304-3800
eISSN
1872-7026
D.O.I.
10.1016/j.ecolmodel.2017.04.018
Publisher site
See Article on Publisher Site

Abstract

•An IBM (DEB) model for bivalves was coupled to an ecosystem model (MOHID).•The model was implemented in the Balgzand intertidal area in a fine resolution domain.•The Balgzand acts a sink of phytoplankton and a source of ammonia.•Spawning season is long but new cohorts are controlled by cannibalism and shrimps.•Starvation is the main mortality in biomass and cannibalism the main in numbers.

Journal

Ecological ModellingElsevier

Published: Sep 10, 2017

References

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