Sea grape (Coccoloba uvifera) leaf damage was measured on 11 islands w
ith diurnal lizards (Anolis sagrei) and on 7 islands without diurnal l
izards from 1986 to 1993. Two types of damage were common: scars (necr
otic areas) and holes (entirely missing areas). A static measure in 19
86 showed that both scar and hole damage tended to be higher on island
s without lizards than on islands with lizards, but only the differenc
e in holes was significant. A dynamic measure that followed tagged lea
ves each year from 1986 to 1993 showed that overall damage was higher
on islands without lizards than on islands with lizards. Island area a
nd isolation were not related to leaf damage. Total leaf damage varied
substantially among years, and the temporal pattern of scars differed
significantly from that of holes. Mortality of tagged leaves varied s
ubstantially among years, but it was nearly identical on islands with
and without lizards. Overall, this study showed that sea grape on enti
rely natural islands was affected positively by lizards and to about t
he same magnitude as in previous experimental studies on a large islan
d.