A student's atlas of flowering plants : some dicotyledons of by planned and prepared under the direction of Carroll E. Wood,

By planned and prepared under the direction of Carroll E. Wood, Jr., assisted by Elizabeth A. Shaw ; with the technical help of Karen S. Velmure and Kenneth R. Robertson.

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Seasonal use of fruits as an alternative food resource for temperate passerines is probably the major impelling influence in the evolution of long-distance migratory movements in the Nearctic and Palaearctic (Levey and Stiles, 1992). , 1993). Frugivorous animals, on the other hand, probably have a negligible effect in shaping the abundance patterns of fleshy fruits in time. Thus, for Western European birddispersed plants, Fuentes (1992) found parallel seasonal trends in bird abundance and the number and biomass of fruits, but not in the proportion of species with ripe fruit; frugivores might favour the seasonal displacement of fruit availability by positive demographic effects on particular plant species fruiting when birds are most abundant.

Lauraceae) has been interpreted as an adaptation to gape-limited avian frugivores (Mazer and Wheelwright, 1993; however see Herrera, 1992). As stated by Wheelwright (1985), fruit size alone does not explain the wide variability in the number of frugivore species feeding at different plant species that have fruits of the same size. , 1987; Herrera, 1987; Debussche, 1988). However, only fruit size among another 15 fruit traits examined by Jordano (1995a; see Appendix to this chapter) was associated with a Fruits and Frugivory major type of seed disperser when accounting for phylogenetic affinities in a comparative analysis of a large data set of angiosperms.

1. Total production (per unit area) of fleshy fruits in different plant communities (placed in order of decreasing magnitude of production). Symbols with asterisks indicate biomass figures as wet mass, all others are dry mass. Thick lines join values for several localities. References: Leigh (1975); Johnson and Landers (1978); Baird (1980); Stransky and Halls (1980); Charles-Dominique et al. (1981); Hladik (1981); Sorensen (1981); Guiti√°n (1984); Herrera (1984b,c); Jordano (1984, 1985, 1988, 1993).

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