Alan G. Hudson

TL;DR: A perspective on the context and evolutionary significance of hybridization during speciation is offered, highlighting issues of current interest and debate and suggesting that the Dobzhansky–Muller model of hybrid incompatibilities requires a broader interpretation.

TL;DR: Evidence is provided that species diversity evolved in response to ecological opportunity, and that eutrophication, by diminishing this opportunity, has driven extinctions through speciation reversal and demographic decline, and it is argued that extinction by Speciation reversal may be more widespread than currently appreciated.

TL;DR: Evidence of sympatric speciation within and parallel evolution of equivalent phenotypes among these lake systems is found, however, there is also the genetic signature of human-mediated gene flow and diversity loss within many lakes, highlighting the fragility of recent radiations.

TL;DR: The first in‐depth investigation of whitefish diversity in a Swiss lake, with continuous spawning habitat sampling in both time and space, shows a clear cline like pattern in genetics and morphology of populations sampled along an ecological depth gradient in Lake Neuchâtel.

TL;DR: It is argued that an integrated view, which merges ecology, evolution and developmental biology (eco evo devo) on an equal footing, is needed to understand the multifaceted role of the environment in simultaneously determining the development of the phenotype and the nature of the selective environment, and how organisms in turn affect the environment through eco evo and eco devo feedbacks.