The GR3D model, a tool to explore the Global Repositioning Dynamics of Diadromous fish Distribution
Authored by Guillaume Deffuant, Thibaud Rougier, Hilaire Drouineau, Nicolas Dumoulin, Thierry Faure, Eric Rochard, Patrick Lambert
Date Published: 2014
DOI: 10.1016/j.ecolmodel.2014.03.019
Sponsors:
French National Research Agency (ANR)
French National Agency for Water and Aquatic Environments (ONEMA)
Platforms:
Java
Model Documentation:
ODD
Flow charts
Mathematical description
Model Code URLs:
Model code not found
Abstract
Within the context of ongoing environmental changes, the life history of
diadromous fish represents a real potential for exploring and colonizing
new environments due to high potential dispersal abilities. The use of
dynamic approaches to assess how these species will respond to climate
change is a challenging issue and mechanistic models able to incorporate
biological and evolutionary processes are a promising tool. To this end
we developed an individual-based model, called GR3D (Global
Repositioning Dynamics for Diadromous fish Distribution), combining
climatic requirements and population dynamics with an explicit dispersal
process to evaluate potential evolution of their distribution area in
the context of climatic change. This paper describes thoroughly the
model structure and presents an exploratory test case where the
repositioning of a virtual allis shad (Alosa alosa L.) population
between two river catchments under a scenario of temperature increase
was assessed. The global sensitivity analysis showed that landscape
structure and parameters related to sea lifespan and to survival at sea
were crucial to determine the success of colonization. These results
were consistent with the ecology of this species. The integration of
climatic factors directly into the processes and the explicit dispersal
process make GR3D an original and relevant tool to assess the
repositioning dynamics and persistence of diadromous fish facing climate
change. (C) 2014 Elsevier B.V. All rights reserved.
Tags
Individual-based model
Atlantic salmon
Climate-change
Environmental-change
Life-history
Species distribution models
Shad alosa-alosa
Salmon salmo-salar
Allis-shad
Water
temperature