Topographically complex regions on land and in the oceans feature hotspots of biodiversity
that reflect geological influences on ecological and evolutionary processes. Over geologic …

Emerging large-scale datasets coupled with statistical advances have provided new insights
into the processes that generate the latitudinal diversity gradient (LDG). But many of these …

Understanding the spatial and temporal evolution of biota in the tropical Andes is a major
challenge, given the region's topographic complexity and high beta diversity. We used a …

During the present study, the evolutionary relationship within a clade of mountain clade of
freshwater crabs (Potamonautes) was examined using mtDNA sequence data for species …

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

A key question about macroevolutionary speciation rates is whether they are controlled by
microevolutionary processes operating at the population level. For example, does spatial …

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 …

Amazonia is a 'source'of biodiversity for other Neotropical ecosystems, but which conditions
trigger in situ speciation and emigration is contentious. Three hypotheses for how …

Divergence with gene flow is well documented and reveals the influence of ecological
adaptation on speciation. Yet, it remains intuitive that gene exchange inhibits speciation in …

South American dry forests have a complex and poorly understood biogeographic history.
Based on the fragmented distribution of many Neotropical dry forest species, it has been …