livestock: Livestock resilience model

In caspr: Cellular Automata for Spatial Pressure in R

Description

A spatially-explicit model of resilience in arid rangelands.

Usage

ca(l, livestock, parms = p)

Arguments

b	environmental quality
m	intrinsic plant mortality, i.e. inverse of av. lifespan
r	max. regeneration rate of plants
K	carrying capacity of the landscape (i.e. global competition)
f	local facilitation
c	local competition
L	livestock density
a	attack rate of livestock
h	handling time of livestock
q	hill-exponent of livestock
p	associational resistance against livestock grazing
v	attractant-decoy effect of plants to livestock

Format

List of 6
 $ name  : chr "Livestock resilience model"
 $ ref   : logi NA
 $ states: chr [1:2] "1" "0"
 $ cols  : chr [1:2] "black" "white"
 $ parms :List of 13
  ..$ r    : num 1
  ..$ b    : num 0.2
  ..$ f    : num 0.9
  ..$ alpha: num 0
  ..$ K    : num 0.8
  ..$ c    : num 0.1
  ..$ m    : num 0.05
  ..$ v    : num 0
  ..$ p    : num 0.8
  ..$ L    : num 6
  ..$ q    : num 0
  ..$ h    : num 50
  ..$ a    : num 0.2
 $ update:function (x_old, parms, subs = 12)  
  ..- attr(*, "srcref")=Class 'srcref'  atomic [1:8] 51 21 93 1 21 1 51 93
  .. .. ..- attr(*, "srcfile")=Classes 'srcfilecopy', 'srcfile' <environment: 0x1e6046b0> 
 - attr(*, "class")= chr "ca_model"

Details

An unpublished, generalized model of positive and negative local feedbacks in arid rangelands, including mechanisms such as local facilitation, competition, associational resistance and attractant-decoy.

Author(s)

F.D. Schneider

See Also

Other models: forestgap; grazing; life; musselbed; predprey

caspr documentation built on May 2, 2019, 5:25 p.m.