Natural history museums and the specimen collections they curate are vital scientific
infrastructure, a fact as true today as it was when biologists began collecting and preserving …

Elevational migration can be defined as roundtrip seasonal movement that involves upward
and downward shifts in elevation. These shifts incur physiological challenges that are …

Geographic turnover in community composition is created and maintained by eco-
evolutionary forces that limit the ranges of species. One such force may be antagonistic …

Closely related species with parapatric elevational ranges are ubiquitous in tropical
mountains worldwide. The gradient speciation hypothesis proposes that these series are the …

Do related populations that are separated by barriers predictably evolve differences from
one another over time, or is such divergence idiosyncratic and unpredictable? We test these …

Seasonal movements are a response to variability in resource availability and result from a
complex interaction between the behavioral and physiological traits of a species and its …

The extent to which species ranges reflect intrinsic physiological tolerances is a major
question in evolutionary ecology. To date, consensus has been hindered by the limited …

Tropical mountains are biodiversity hotspots. In particular, mountains in the Neotropics
exhibit remarkable beta diversity reflecting species turnover along elevational gradients …

The thermal biology of ectotherms largely determines their abundance and distributions. In
general, tropical species inhabiting warm and stable thermal environments tend to have low …

Janzen's influential “mountain passes are higher in the tropics” hypothesis predicts restricted
gene flow and genetic isolation among populations spanning elevational gradients in the …