WOLFRAM SYSTEMMODELER

LBM

Larch bud moth population dynamics model

Diagram

Wolfram Language

In[1]:=
Click for copyable input
SystemModel["SystemDynamics.PopulationDynamics.LarchBudMoth.LBM"]
Out[1]:=

Information

The larch bud moth model describes the population dynamics of the larch bud moth insect in the upper Engiadina valley of Switzerland.


References:

  1. Cellier, F.E. (1991), Continuous System Modeling, Springer-Verlag, New York, ISBN: 0-387-97502-0, 755p.
  2. Fischlin, A. and W. Baltensweiler (1979), "Systems Analysis of the Larch Bud Moth System. Part I: The Larch - Larch Bud Moth Relationship," Mitteilungen der Schweizerischen Entomologischen Gesellschaft, 52, pp.273-289.


Simulate the model across 29 time units (years) and plot the simulated and the measured data together against the calendar years.


Public Parameters (5)

wintermortality

Value: 0.5728

Type: Real

Description: Percentage of eggs dying during the winter

biomass

Value: 91.3

Type: Mass (kg)

Description: Dry needle biomass per tree

nbr_trees

Value: 511147

Type: Integer

Description: Number of trees

egg0

Value: 4765975

Type: Integer

Description: Initial number of eggs

rawfiber0

Value: 15.0

Type: Real

Description: Initial rawfiber

Outputs (2)

LogDensitySim

Type: Real

Description: Simulated logarithmic larvae density

LogDensityMeas

Type: Real

Description: Measured logarithmic larvae density

Components (33)

Source1

Type: Source

NewEggs

Type: Rate_1

Eggs

Type: DiscreteLevel

OldEggs

Type: Rate_1

Sink1

Type: Sink

Hatching

Type: Gain

Rawfiber

Type: DiscreteLevel

NewFiber

Type: Rate_1

Source2

Type: Source

OldFiber

Type: Rate_1

Sink2

Type: Sink

Incoincidence

Type: Linear

Coincidence

Type: Linear

Prod_2_1

Type: Prod_2

Weakening

Type: Linear

Physiology

Type: Linear

TreeFoliage

Type: Linear

Prod_2_2

Type: Prod_2

NbrTrees

Type: Const

Starvation1

Type: Starvation

FoodDemand

Type: Gain

FoodSupply

Type: Linear

Prod_3_1

Type: Prod_3

SexRatio

Type: Gain

Fecundity

Type: Linear

Prod_2_3

Type: Prod_2

Defoliation1

Type: Defoliation

Grecr1

Type: Grecr

Prod_2_4

Type: Prod_2

LarvaeDensity

Type: Gain

Logarithm1

Type: Logarithm

Measurement

Type: Tabular

Logarithm2

Type: Logarithm