Vital rate
M1
M2
s0
P × Y
-
s1
P × Y
-
s2
P + Y
Y
2
P + Y
1) Y, 2) P
Notes: For each lower-level vital rate, the best model is indicated (M1), as well as models with some support (
AIC
2) (M2). The explanatory variables are population (P) and year (Y). Interaction between population and year is denoted as P × Y.