ATOLL RESEARCH BULLETIN NO. 251 BIOGEOGRAPHY of the PUERTO RICAN BANK by Harold Heatwole, Richard Levins and Michael D. Byer
ATOLL RESEARCH BULLETIN NO. 251 BIOGEOGRAPHY OF THE PUERTO RICAN BANK by Harold Heatwole, Richard Levins and Michael D. Byer Issued by THE SMITHSONIAN INSTITUTION Washington, D. C., U.S.A. July 1981 VIRGIN ISLANDS CULEBRA PUERTO RlCO Fig. 1. Map of the Puerto Rican Island Shelf. Rectangles A - E indicate boundaries of maps presented in more detail in Appendix I. 1. Cayo Santiago, 2. Cayo Batata, 3. Cayo de Afuera, 4. Cayo de Tierra, 5. Cardona Key, 6. Protestant Key, 7. Green Key (st. ~roix), 8. Caiia Azul ATOLL RESEARCH BULLETIN 251 ERRATUM The following caption should be inserted for figure 7: Fig. 7. Temperature in and near a small clump of vegetation on Cayo Ahogado. Dots: 5 cm deep in soil under clump. Circles: 1 cm deep in soil under clump. Triangles: Soil surface under clump. Squares: Surface of vegetation. X's: Air at center of clump. Broken line indicates intervals of more than one hour between measurements. BIOGEOGRAPHY OF THE PUERTO RICAN BANK by Harold Heatwolel, Richard Levins2 and Michael D. Byer3 INTRODUCTION There has been a recent surge of interest in the biogeography of archipelagoes owing to a reinterpretation of classical concepts of evolution of insular populations, factors controlling numbers of species on islands, and the dynamics of inter-island dispersal. The literature on these subjects is rapidly accumulating; general reviews are presented by Mayr (1963) , and Baker and Stebbins (1965) . Carlquist (1965, 1974), Preston (1962 a, b), ~ac~rthurand Wilson (1963, 1967) , MacArthur et al. (1973) , Hamilton and Rubinoff (1963, 1967), Hamilton et al. (1963) , Crowell (19641, Johnson (1975) , Whitehead and Jones (1969), Simberloff (1969, 19701, Simberloff and Wilson (1969), Wilson and Taylor (19671, Carson (1970), Heatwole and Levins (1973) , Abbott (1974) , Johnson and Raven (1973) and Lynch and Johnson (1974), have provided major impetuses through theoretical and/ or general papers on numbers of species on islands and the dynamics of insular biogeography and evolution.
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