This simulation shows how plant, deer and wolf populations impact each other in a deciduous forest ecosystem.

This simulation shows how plant, deer and wolf populations impact each other in a deciduous forest ecosystem.

This simulation shows how plant, deer and wolf populations impact each other in a deciduous forest ecosystem.

This simulation shows how plant, deer and wolf populations impact each other in a deciduous forest ecosystem.

This simulation shows how plant, deer and wolf populations impact each other in a deciduous forest ecosystem.

This simulation shows how plant, deer and wolf populations impact each other in a deciduous forest ecosystem.

This simulation shows how plant, deer and wolf populations impact each other in a deciduous forest ecosystem.

This simulation shows how plant, deer and wolf populations impact each other in a deciduous forest ecosystem.

This simulation shows how plant, deer and wolf populations impact each other in a deciduous forest ecosystem.

This simulation shows how plant, deer and wolf populations impact each other in a deciduous forest ecosystem.

This simulation shows how plant, deer and wolf populations impact each other in a deciduous forest ecosystem.

This simulation shows how plant, deer and wolf populations impact each other in a deciduous forest ecosystem.

This simulation shows how plant, deer and wolf populations impact each other in a deciduous forest ecosystem.

Eastern oyster growth model calibrated for Long Island Sound
Developed and implemented by Joao G. Ferreira and Camille Saurel; growth data from Eva Galimany, Gary Wickfors, and Julie Rose; driver data from Julie Rose and Suzanne Bricker; Culture practice from the REServ team and Tessa Getchis.

This is a one box model for an idealized farm with one million oysters seeded (one hectare @ a stocking density of 100 oysters per square meter)

1. Run WinShell individual growth model for one year with Long Island Sound growth drivers;

2. Determine the scope for growth (in dry tissue weight per day) for oysters centered on the five weight classes)
 
3. Apply a classic population dynamics equation:

dn(s,t)/dt = -d[n(s,t)g(s,t)]/ds - u(s)n(s,t)

s: Weight (g)
t: Time
n: Number of individuals of weight s
g: Scope for growth (g day-1)
u: Mortality rate (day-1)

4. Set mortality at 30% per year, slider allows scenarios from 30% to 80% per year

5. Determine harvestable biomass, i.e. weight class 5, 40-50 g (roughly three inches length)

This simulation shows how plant, deer and wolf populations impact each other in a deciduous forest ecosystem.

This simulation shows how plant, deer and wolf populations impact each other in a deciduous forest ecosystem.

This simulation shows how plant, deer and wolf populations impact each other in a deciduous forest ecosystem.

This simulation shows how plant, deer and wolf populations impact each other in a deciduous forest ecosystem.

This simulation shows how plant, deer and wolf populations impact each other in a deciduous forest ecosystem.

This simulation shows how plant, deer and wolf populations impact each other in a deciduous forest ecosystem.

This simulation shows how plant, deer and wolf populations impact each other in a deciduous forest ecosystem.

Bienvenue sur le simulateur du modèle à flux constants.

Ce modèle est basé sur notre cas d'étude simplifié : un groupe de guépards dans un parc national géré, où les entrées et sorties sont contrôlés par les gestionnaires (translocation entre parcs).

Fonctionnement :

• Le [Variable d'état] qui représente l'effectif de guépards (le nombre d'individus).

• Les [Flux] (B, I, D, E) sont le nombre fixe d'individus qui entrent ou sortent à chaque pas de temps.

• Variables forçantes : Les décisions des gestionnaires sont les "variables forçantes" qui rendent ces flux constants.

Votre mission : Utilisez les curseurs pour régler les conditions et lancez la simulation en cliquant sur le bouton "SIMULATE" en haut à droite, pour observer comment l'effectif évolue sur le graphique !

This simulation shows how plant, deer and wolf populations impact each other in a deciduous forest ecosystem.