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Image : Annual Forecasts


Figure 2. The A. fundyense population dynamics model.  Fundamental to this approach is the concept that the ecosystem in which A. fundyense resides is not explicitly modeled.  This is justified on the basis that, with very few exceptions, A. fundyense constitutes a small fraction of the total phytoplankton species assemblage in the GOM.  As such, it does not materially affect either the ambient nutrient concentrations or predator abundances.  Therefore these “ecosystem effects” can be parameterized through their influence on the vital rates of A. fundyense’s population dynamics.  These vital rates are complex functions of environmental parameters, such as temperature, salinity, light and nutrients in the case of vegetative growth, and temperature, light and an endogenous clock in the case of germination.   All of this takes place in an complex, turbulent, three-dimensional fluid medium, some characteristics of which are evident in the sea surface temperature image on which this schematic is overlaid.

(Dennis McGillicuddy, WHOI)

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Last updated: March 24, 2016
 


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