Sampling design
We surveyed Anolis lizard communities in plots across the
Dominican Republic (Hispaniola) and Jamaica between June and August of
2016-2018. We surveyed plots in 20 landscapes (13 on Hispaniola, 7 on
Jamaica), distributed over broad temperature and precipitation
gradients. Study landscapes were distributed from sea level to 2,380m on
the Dominican Republic (highest point is 3,098m) and to 1,923m on
Jamaica (highest point is 2,256m), and encompass an elevation range
representing >99.5% of the total land area of each island.
Climate conditions were broadly similar in our sample (Fig. S1).
Each landscape contained 2-4 30m-diameter plots in forest habitat—the
native climax vegetation (NDR= 35,
NJamaica = 20). An observer surveyed each plot six
times. Each time, we marked any observed lizards with non-toxic paint
following Heckel and Roughgarden (1979). Paint marks allowed us to
identify re-sighted individuals, permitting estimation of total
abundance for each species.