منابع مشابه
Adaptive radiation in Lesser Antillean lizards: molecular phylogenetics and species recognition in the Lesser Antillean dwarf gecko complex, Sphaerodactylus fantasticus.
The time associated with speciation varies dramatically among lower vertebrates. The nature and timing of divergence is investigated in the fantastic dwarf gecko Sphaerodactylus fantasticus complex, a nominal species that occurs on the central Lesser Antillean island of Guadeloupe and adjacent islands and islets. This is compared to the divergence in the sympatric anole clade from the Anolis bi...
متن کاملHistory and the species-area relationship in Lesser Antillean birds.
We examined the species-area relationship for three historically distinct subsets of Lesser Antillean birds identified by molecular phylogenetic analysis of island and continental populations. The groups comprised recent colonists from continental or Greater Antillean source populations, old taxa having recently expanded distributions within the Lesser Antilles, and old endemic taxa lacking evi...
متن کاملNonequilibrium diversity dynamics of the Lesser Antillean avifauna.
MacArthur and Wilson's model of island diversity predicts an increase in the number of species until colonization and extinction are balanced at a long-term steady state. We appraise this model on an evolutionary time scale by molecular phylogenetic analysis of the colonization of the Lesser Antilles by small land birds. The pattern of accumulation of species with time, estimated by genetic div...
متن کاملPlenary06: Taxon cycles in the Lesser Antillean avifauna
Patterns of taxonomic differentiation and geographical distribution of West Indian birds suggest that taxa may pass through phases of increasing and decreasing geographical range. Such sequences are referred to as taxon cycles. Although decline may often lead to extinction, new phases of expansion, accompanied by increased or shifted habitat distribution are also possible. The taxon cycle is a ...
متن کاملNeophobia by the Lesser-Antillean Bullfinch, a Foraging Generalist, and the Bananaquit, a Nectar Specialist
—Generalist birds are thought to be less neophobic than specialists, but the dietary difference is often confounded by differences in experience and food availability. We conducted field tests with an artificial nectar source on a foraging generalist [LesserAntillean Bullfinch (Loxigilla noctis)] and a nectarivorous specialist [Bananaquit (Coereba flaveola)] in Barbados. Both species are equall...
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ژورنال
عنوان ژورنال: The Auk
سال: 1905
ISSN: 0004-8038,1938-4254
DOI: 10.2307/4070159