Landscape dynamics and diversification of the megadiverse South American freshwater fish fauna.

ABSTRACT: Landscape dynamics are widely thought to govern the tempo and mode of continental radiations, yet the effects of river network rearrangements on dispersal and lineage diversification remain poorly understood. We integrated an unprecedented occurrence dataset of 4,967 species with a newly compiled, time-calibrated phylogeny of South American freshwater fishes-the most species-rich continental vertebrate fauna on Earth-to track the evolutionary processes associated with hydrogeographic events over 100 Ma. Net lineage diversification was heterogeneous through time, across space, and among clades. Five abrupt shifts in net diversification rates occurred during the Paleogene and Miocene (between 30 and 7 Ma) in association with major landscape evolution events. Net diversification accelerated f

SUBMITTER: Cassemiro FAS 

PROVIDER: S-EPMC9926176 | biostudies-literature | 2023 Jan

REPOSITORIES: biostudies-literature