EcoNet model examples

This page contains sample EcoNet model examples created by other users. Please contact me if you'd like to load your model to this page. You can easily run these models by just copying and pasting them to EcoNet model window.

Intertidal Oyster Reef Ecosystem Model

This model is already at steady-state. You can perturb the initial conditions, or use the stochastic method to see the inherent variations in each compartment value.

# Intertidal Oyster Reef Ecosystem Model, by Dame and Patten.

# Model flows are in kcal m^-2 day^-1; storage data is 
# kcal m^-2. 

# This model is based on the Matlab model written by Fath 
# and Borrett (2004).

# Dame, R. F., and B. C. Patten. 1981. Analysis of energy 
# flows in an intertidal oyster reef. Marine Ecology Progress 
# Series 5:115-124.

# Patten, B. C. 1985. Energy cycling, length of food chains,
# and direct versus indirect effects in ecosystems. Can. 
# Bull. Fish. Aqu. Sci. 213:119-138.

* -> Filter_Feeders              c=41.4697

Filter_Feeders -> Dep_Detritus   c=0.0079
Filter_Feeders -> Predators      c=0.0003
Dep_Detritus -> Microbiota       c=0.0082
Dep_Detritus -> Meiofauna        c=0.0073
Dep_Detritus -> Dep_Feeders      c=0.0006
Microbiota -> Meiofauna          c=0.5
Microbiota -> Dep_Feeders        c=0.5
Meiofauna -> Dep_Detritus        c=0.1758
Meiofauna -> Dep_Feeders         c=0.0274
Dep_Feeders -> Dep_Detritus      c=0.1172
Dep_Feeders -> Predators         c=0.0106
Predators -> Dep_Detritus        c=0.0047

Filter_Feeders -> *   c=0.0126
Dep_Detritus -> *     c=0.0062
Microbiota -> *       c=2.3880
Meiofauna -> *        c=0.1484
Dep_Feeders -> *      c=0.0264
Predators -> *        c=0.0052

Filter_Feeders = 2000; Dep_Detritus = 1000;
Microbiota = 2.4121; Meiofauna = 24.121;
Dep_Feeders = 16.274;   Predators = 69.237

Georgia Salt Marsh Model

#Georgia salt marsh model, by C. Small. 

# Based on model by Teal, John M. (1962) 
# Energy flow in the salt marsh ecosystem of 
# Georgia.  Ecology 43:614-624.

* -> spartina  c=94.74
* -> algae     c=4.93
spartina -> insects  c=0.002
spartina -> detritus c=0.03
spartina -> bacteria c=0.0001
algae -> detritus c=0.02
algae -> nematodes c=0.02
insects -> detritus c=0.2
insects -> spiders  c=0.05
detritus -> bacteria c=0.01
detritus -> nematodes c=0.01
bacteria -> nematodes c=0.01
bacteria -> detritus c=0.5
spiders -> detritus c=0.1
nematodes -> detritus c=0.6
nematodes -> mudcrabs c=0.01
mudcrabs -> detritus  c=0.1
spartina -> * c=0.15
algae -> * c=0.1
insects -> * c=.1
detritus -> * c=0.02
bacteria -> * c=0.4
spiders -> * c=0.05
nematodes -> * c=0.2
mudcrabs -> * c=0.05

#initial values
spartina=450, algae=20, insects=1
detritus=250, bacteria= 800, spiders=0.18
nematodes=0.5, mudcrabs=0.1

Oxygen cycling in an algae-Daphnia microcosm

# Oxygen cycling in an algae-Daphnia microcosm
# by J. Shetsov and E. Susko.
# based on unpublished data from Frieda Taub

* -> CO2  c=154.5
* -> O2  c=157.316089

Algae -> Daphnia  c=46.78
Algae -> CO2  c=157.3
Algae -> O2  c=154.5
Algae -> H2O  c=78.65

Daphnia -> Detritus  c=0.159
Daphnia -> CO2  c=0.0151
Daphnia -> H2O  c=0.00755
Daphnia -> Nutrients  c=0.327

Detritus -> CO2  c=0.000989
Detritus -> Nutrients  c=0.000112

CO2 -> *  c=157.316089
CO2 -> Algae  c=154.5

O2 -> *  c=154.5
O2 -> Algae  c=157.3
O2 -> Daphnia  c=0.0151
O2 -> Detritus  c=0.000989

H2O -> Algae  c=154.5
H2O -> Detritus  c=0.000037

Nutrients -> Algae  c=154.5

Algae = .9576; Daphnia = 96.6; 
Detritus = 38826; CO2 = 1.2034; 
O2 = 1.0745; H2O = 0.55743 ; Nutrients = .232075

Aquatic-terrestrial transport of Nitrogen by coastal river otters

This is a stiff model with high compartment values, please increase Sensitivity parameter to 1. 
# This is a stiff model with high compartment values. 
# Please run with parameter Sensitivity = 1 (instead of 0.001

# Aquatic-Terrestrial Transport of Nitrogen by Lontra canadensis.  
# R. Callan and M. Novak

* -> Dissolved_N c=50000
* -> Otters c=1.13479

PrimaryProducers -> PrimaryConsumers c=0.521
PrimaryConsumers -> Dissolved_N      c=0.07
PrimaryConsumers -> Detritus         c=0.02
PrimaryConsumers -> SchoolingFish    c=0.15
PrimaryConsumers -> SecondaryConsumers c=0.10
Dissolved_N -> PrimaryProducers        c=0.2
Detritus -> PrimaryConsumers    c=0.2
SchoolingFish -> Dissolved_N    c=0.07
SchoolingFish -> Detritus       c=0.04
SchoolingFish -> UpperLevelPredators  c=0.1
SchoolingFish -> Otters         c=0.000023177
SecondaryConsumers  -> Dissolved_N    c=0.07
SecondaryConsumers  -> Detritus       c=0.04
SecondaryConsumers  -> UpperLevelPredators c=0.1
UpperLevelPredators -> Dissolved_N    c=0.3
UpperLevelPredators -> Detritus       c=0.04
Otters -> Detritus    c=0.02

Otters -> *      c=0.114
Dissolved_N -> * c=0.15

# initial stock values
Dissolved_N = 269212, PrimaryProducers = 99411.1
Detritus = 78077.6, PrimaryConsumers = 189855 
SchoolingFish = 126933, Otters = 26.1501
SecondaryConsumers = 93414.4 
UpperLevelPredators = 62228.3