Evolution and forest resource use GERMAN

Evolution and forest resource use GERMAN preview image

This model is seeking new collaborators — would you please help?

1 collaborator

Default-person Susan Hanisch (Author)

Tags

evolution 

Tagged by Susan Hanisch 5 months ago

sustainability 

Tagged by Susan Hanisch 5 months ago

Visible to everyone | Changeable by everyone
Model was written in NetLogo 6.1.1 • Viewed 72 times • Downloaded 2 times • Run 0 times
Download the 'Evolution and forest resource use GERMAN' modelDownload this modelEmbed this model

Do you have questions or comments about this model? Ask them here! (You'll first need to log in.)


Info tab cannot be displayed because of an encoding error

Comments and Questions

Please start the discussion about this model! (You'll first need to log in.)

Click to Run Model

breed [trees tree]
breed [farmers farmer]

farmers-own [
  harvest-type
  amount
  harvest
  wealth
]

trees-own [height]


;;;;;;;;;;;;;;;;;;;;;;
;;;Setup Procedures;;;
;;;;;;;;;;;;;;;;;;;;;;

to setup
  clear-all

  setup-pastures
  setup-trees
  setup-farmers

  reset-ticks
end 

to setup-pastures
  ask patches [set pcolor brown + 2]
end 

to setup-trees
  ask patches [
    sprout-trees 1 [
    set shape "tree"
    set color green - 2
    set height Max-Baumhoehe
    set size ( height / 100 )
  ]]
end 

to setup-farmers
  ask n-of Anzahl-Agenten patches
    [sprout-farmers  1 [
      set shape "person logger"

      set size 0.9 ] ]

  ask n-of Gemaessigte farmers [ set harvest-type "sustainable"]

  update-color
end 


;;;;;;;;;;;;;;;;;;;;;;;;
;;;Runtime Procedures;;;
;;;;;;;;;;;;;;;;;;;;;;;;

to go

  ask farmers with [harvest-type = "sustainable"] [set amount Anteil-gemaessigt]
  ask farmers with [harvest-type = "greedy"] [set amount Anteil-gierig]

  cut-trees

  livingcosts

  if Fortpflanzung?
  [reproduce]
  death

  ask trees [ regrow]

  tick
end 

to cut-trees

  harvest-commons

  ask farmers [set wealth wealth + harvest]
end 

to harvest-commons
  ask farmers [
     let harvest-tree max-one-of (trees in-radius 1) [height]
   ;; let neighborhood (patch-set neighbors with [not any? farmers-on self ])
  ;;  ifelse (any? neighborhood)
 ;;   [
     ;; let harvest-tree max-one-of (trees-on neighborhood) [height]
       move-to harvest-tree
        set harvest (  [height] of harvest-tree  * ( amount / 100))
        ask  harvest-tree [set height (height - (height * [amount ] of myself / 100))]
    ]
   ;; [set harvest 0]
  ;;]
end 

to livingcosts
  ask farmers [set wealth wealth - Lebenshaltungskosten]
end 

to reproduce

 ask farmers
  [ let neighborhood  (patch-set neighbors with [not any? farmers-on self ])
      if (any? neighborhood)  and random-float 1 < ( 0.0005 * wealth );;/ 100)
        [hatch 1 [

         set wealth ([wealth] of myself / 2)
         move-to one-of neighborhood
          ]
        set wealth (wealth / 2)
        ]
     ]
end 

to death
  ask farmers
  [if wealth <= 0 [die]]
end 

to update-color
   ask farmers [
    ifelse harvest-type = "sustainable"
      [set color green ]
      [set harvest-type "greedy"
       set color red]
  ]
end 

to regrow ;; tree
  ifelse height > 0
   [ set height  (height + ((Wachstumsrate * height) * (1 - (height / ( Max-Baumhoehe)  ))))
   ]
   [set height 0.1]
  set size height / 100
end 

;;;;;;;;;;;;;;
;;;;;;;;;;;;;

;;; Farmers1 variables

to-report average-wealth-greedys
  report sum [wealth] of farmers with [harvest-type = "greedy"] / count farmers with [harvest-type = "greedy"]
end 

to-report average-wealth-sustainables
  report sum [wealth] of farmers with [harvest-type = "sustainable"] / count farmers with [harvest-type = "sustainable"]
end 

There are 2 versions of this model.

Uploaded by When Description Download
Susan Hanisch 4 months ago German characters created an error Download this version
Susan Hanisch 5 months ago Initial upload Download this version

Attached files

File Type Description Last updated
Evolution and forest resource use GERMAN.png preview Preview for 'Evolution and forest resource use GERMAN' 5 months ago, by Susan Hanisch Download

This model does not have any ancestors.

This model does not have any descendants.