SNPsm {dave} R Documentation

## The spatial and temporal model of succession in the Swiss National Park

### Description

A dynamic model of succession on alp Stabelchod in the Swiss Nationl Park using differential equations and numerial integration. 6 species guilds are considered. Space is conceived as a grid of 30 times 40 cells. Typical simulation time is around 500yr.

### Usage

SNPsm(trange,tsl,diff,r6,...)
SNPsm2(trange=100,tsl=5.0,diff=0.001,r6=NULL)

## Default S3 method:
SNPsm(trange, tsl, diff, r6, ...)
## S3 method for class 'SNPsm'
plot(x, ...,out.seq=1,col=FALSE)


### Arguments

 trange Time range of simulation in yr tsl Time range of simulation in yr out.seq Time interval (yr) at which maps of the state are printed diff A diffusion coefficient driving random spatial propagation r6 Growth rates of 6 guilds involved, increase in cover percentage per yr ... Parameter out.seq, the plotting interval x An object of class "SNPsm" col A logical variable to suppress color printing

### Value

An object of class "SNPsm" with at least the following items:

 n.time.steps  Number of time steps used for numerical integration imax  Vertical grid count jmax  Horizontal grid count time.step.length  The time step length in yr veg.types  The names of the vegetation types, i.e., the species vegdef  A nspecies x nspecies matrix defining composition of vegetation types growth.rates  The growth rates given upon input sim.data Simulated scores of all species (guilds) during simulation time tmap The 30 x 40 grid map of types used as initial condition igmap The same as tmap frame A 30 x 40 grid showing initial forest edges, used for printing

Otto Wildi

### References

Wildi, O. 2002. Modeling succession from pasture to forest in time and space. Community Ecology 3: 181–189.

Wildi, O. 2017. Data Analysis in Vegetation Ecology. 3rd ed. CABI, Oxfordshire, Boston.

### Examples

r6=NULL           # imposes default growth rates
o.stSNP<- SNPsm(trange=100,tsl=10.0,diff=0.001,r6)
plot(o.stSNP,out.seq=50)


[Package dave version 2.0 Index]