Life History Model

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Life History Model
Seedlings (100)
Flowering Ramets (35)
sf
sf 35/100 0.35
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Difference Equations

• Set up equations
• SDL emrg x SB
• FR sf x SDL
• SP spp x FR
• SB (Previous SB SDL SP x sr) x ss
• Used to determine overall population growth rate
  (?)
• ? Nt / Nt-1
• ? gt 1 indicates positive growth rate
• ? lt 1 indicates negative growth rate
• To project population into future Nt No?t

3
Transition Matrix Models

• Use transition values to predict future
  population size and demography (Caswell 2001)
• Age structured matrix (Leslie 1945)
• Stage structured matrix (Leftkovitch 1965)
• Matrix output includes
• Dominant eigenvalue (?)
• Left eigenvector (stage reproductive value
  distribution)
• Right eigenvector (stable stage distribution)

4
Transition Matrix Models
5
Transition Matrix Models