Publications

Journal Article
KI Warheit, J.D. Forman, J. B. Losos, and D. B. Miles. 1999. “Morphological diversification and adaptive radiation: a comparison of two diverse lizards clades.” Evolution, 53, Pp. 1226-1234. PDF
T. R. Jackman, A. Larson, K. de Queiroz, and J. B. Losos. 1999. “Phylogenetic relationships and the tempo of early diversification in Anolis lizards.” Systematic Biology, 48, Pp. 254-285. PDF
D. J. Irschick and J. B. Losos. 1999. “Do Lizards Avoid Habitats in Which Performance Is Submaximal? The Relationship between Sprinting Capabilities and Structural Habitat Use in Caribbean Anoles.” Am Nat, 154, Pp. 293-305.Abstract

Recent years have seen an increased emphasis on measuring ecologically relevant performance capabilities to understand associations between morphology and habitat use. Such studies presume that performance is invariant, but in eight Caribbean Anolis lizard species, we found that maximal sprinting ability depends on surface diameter. Moreover, these species differ in the degree to which sprint speed declines with decreasing surface diameter, defined as "sprint sensitivity" (high sprint sensitivity=substantial declines in speed between broad and narrow dowels). The habitat constraint hypothesis postulates that Anolis lizards will avoid structural habitats in which their maximal sprinting capabilities are impaired. The habitat breadth hypothesis postulates that species whose performance is less affected by substrate will use a greater variety of habitats than species whose performance varies to a greater extent on surfaces of different diameters. Field observations quantified the proportion of time that lizards spent on different perch diameters. Both hypotheses were confirmed: species with high values of sprint sensitivity avoided using perches on which their maximal sprinting abilities are impaired, whereas species with low sprint sensitivity used such "submaximal" surfaces more frequently. Species with low sprint sensitivity used a broader range of structural habitats than species with high sprint sensitivity.

PDF
J. B. Losos. 1999. “Uncertainty in the reconstruction of ancestral character states and limitations on the use of phylogenetic comparative methods.” Anim Behav, 58, Pp. 1319-1324. PDF
D. J. Irschick and J. B. Losos. 1998. “A comparative analysis of the ecological significance of maximal locomotor performance in Caribbean Anolis lizards.” Evolution, 52, Pp. 219-226. PDF
J. B. Losos and L.-R. Chu. 1998. “Examination of factors affecting dewlap size in Caribbean anoles.” Copeia, 1998, Pp. 430-438. PDF
M. Leal, J.A. Rodríguez-Robles, and J. B. Losos. 1998. “An experimental study of interspecific interactions between two Puerto Rican Anolis lizards.” Oecologia, 117, Pp. 273-278. PDF
K. de Queiroz, L.-R. Chu, and J. B. Losos. 1998. “A second Anolis lizard in Dominican amber and the systematics and ecological morphology of Dominican amber anoles.” American Museum of Natural History Novitates, 3249, Pp. 1-23. PDF
J. B. Losos, T. R. Jackman, A. Larson, K. Queiroz, and L. Rodriguez-Schettino. 1998. “Contingency and determinism in replicated adaptive radiations of island lizards.” Science, 279, Pp. 2115-8.Abstract

The vagaries of history lead to the prediction that repeated instances of evolutionary diversification will lead to disparate outcomes even if starting conditions are similar. We tested this proposition by examining the evolutionary radiation of Anolis lizards on the four islands of the Greater Antilles. Morphometric analyses indicate that the same set of habitat specialists, termed ecomorphs, occurs on all four islands. Although these similar assemblages could result from a single evolutionary origin of each ecomorph, followed by dispersal or vicariance, phylogenetic analysis indicates that the ecomorphs originated independently on each island. Thus, adaptive radiation in similar environments can overcome historical contingencies to produce strikingly similar evolutionary outcomes.

PDF
D. A. Spiller, J. B. Losos, and T. W. Schoener. 1998. “Impact of a catastrophic hurricane on island populations.” Science, 281, Pp. 695-7.Abstract

Lizard and spider populations were censused immediately before and after Hurricane Lili on islands differentially affected by the storm surge. The results support three general propositions. First, the larger organisms, lizards, are more resistant to the immediate impact of moderate disturbance, whereas the more prolific spiders recover faster. Second, extinction risk is related to population size when disturbance is moderate but not when it is catastrophic. Third, after catastrophic disturbance, the recovery rate among different types of organisms is related to dispersal ability. The absence of the poorer dispersers, lizards, from many suitable islands is probably the result of long-lasting effects of catastrophes.

PDF
JB Losos and K de Queiroz. 1997. “Darwin's lizards.” Natural History, 106, Pp. 34-39. PDF
J. B. Losos, KI Warheit, and T. W. Schoener. 1997. “Adaptive differentiation following experimental island colonization in Anolis lizards.” Nature, 387, Pp. 70-73. PDF
J. A. Stamps, J. B. Losos, and R.M. Andrews. 1997. “A comparative study of population density and sexual size dimorphism in lizards.” American Naturalist, 149, Pp. 64-90. PDF
D.L. Irschick, L.J. Vitt, P.A. Zani, and J. B. Losos. 1997. “A comparison of evolutionary radiations in mainland and West Indian Anolis lizards.” Ecology, 78, Pp. 2191-2203. PDF
D. Glossip and J. B. Losos. 1997. “Ecological correlates of number of subdigital lamellae in anoles.” Herpetologica, 53, Pp. 192-199. PDF
J. B. Losos and K. de Queiroz. 1997. “Evolutionary consequences of ecological release in Caribbean Anolis lizards.” Biological Journal of the Linnean Society, 61, Pp. 459-483. PDF
K. Autumn and J. B. Losos. 1997. “Notes on jumping ability and thermal biology of the enigmatic anole Chamaelinorops barbouri.” Journal of Herpetology, 31, Pp. 442-444. PDF
M. A. Butler and J. B. Losos. 1997. “Testing for unequal amounts of evolution in a continuous character on different branches of a phylogenetic tree using linear and squared-change parsimony: an example using Lesser Antillean Anolis lizards.” Evolution, 51, Pp. 1623-1635. PDF
D. J. Irschick, C.C. Austin, K. Petren, R.N. Fisher, J. B. Losos, and O. Ellers. 1996. “A comparative analysis of clinging ability among pad-bearing lizards.” Biological Journal of the Linnean Society, 59, Pp. 21-35. PDF
J. B. Losos. 1996. “Dynamics of range expansion by three introduced species of Anolis lizards on Bermuda.” Journal of Herpetology, 30, Pp. 204-210. PDF

Pages