FLOWERING AND FRUITING PATTERNS IN THE TEMPERATE RAIN-FOREST OF CHILOE, CHILE - ECOLOGIES AND CLIMATIC CONSTRAINTS

1 The timing of appearance and the seasonal abundance of flower buds a nd flowers, and of green and ripe fruit of 61 species of native woody plants in the temperate rain forest of Chiloe Island (42 degrees 24 ' S), Chile, were recorded over the course of 2 years. 2 We evaluated th e effectiveness of climatic and ecological variables to predict phenol ogical trends in this forest. 3 Unimodal yearly patterns were found bo th for flowering and fruiting events in the community. In some species bimodal tendencies were detected at the population and/or individual level. 4 Some species produced flowers and/or fruits all year long, bu t flowering was concentrated in spring and summer. Fruiting was less s easonal and more variable in the 2 years than flowering. 5 Length of f lowering and fruiting, and the peak of flowering were best correlated with ecological variables such as pollination and dispersal modes, and with family membership. Phenological differences between life forms w ere due to associated differences in family membership and pollination and dispersal modes. No effects could be ascribed to successional sta tus or habitat preference of species. 6 Mean monthly temperatures were strongly and positively correlated with the number of species in flow er or in fruit, and flowering was negatively correlated with average a ir humidity and total monthly precipitation. 7 The length of the fruit ripening period showed no correlation with mean fruit size. 8 Reprodu ctive phenology in Chiloe was largely constrained by seasonal climatic variables, but ecological variables also need to be considered to acc ount for the observed patterns of flowering and fruiting in this tempe rate forest.