Pelagic zone is an evolutionary catalyst, but an ecological dead end, for North American minnows

Colonization of a novel geographic area is a classic source of ecological opportunity. Likewise, complex microhabitats are thought to promote biodiversity. We sought to reconcile these two predictions when they are naturally opposing outcomes. We assess the macroevolutionary consequences of an ancestral shift from benthic to pelagic microhabitat zones on rates of speciation and phenotypic evolution in North American minnows. Pelagic species have more similar phenotypes and slower rates of phenotypic evolution, but faster speciation rates, than benthic species. These are likely two independent, opposing responses to specialization along the benthic-pelagic axis, as rates of phenotypic evolution and speciation are not directly correlated. The pelagic zone is more structurally homogenous and offers less ecological opportunity, acting as an ecological dead end for minnows. In contrast, pelagic species may be more mobile and prone to dispersal and subsequent geographic isolation and, consequ..., , , # Data from: Pelagic zone is an evolutionary catalyst, but an ecological dead end, for North American minnows

(published in the journal Evolution)

Authors: Edward D. Burress and Pamela B. Hart

correspondence: Edward D. Burress; [[e-mail]](mailto:[e-mail])

The associated dryad repository contains two files:

(1) a .csv file that contains the supporting data used for the analyses in the manuscript

This file contains 16 columns. Column abbreviations are as follows: species names (x), mouth angle (MA), standard length (SVL), caudal peduncle length (CPL), caudal peduncle depth (CPD), caudal peduncle width (CPW),body depth (BD), body width (BW), head depth (HD), head width (HW), eye diameter (ED), lower jaw length (LJL), snout length (SnL), Museum accession numbers (see below; MAN) of specimens measured, and number of specimens measured (NUM).

All numerical values are species means.

Columns 2 (MA) is reported in degrees.

Columns 3-14 (linear distances) are reported in ...