The role of ecological constraint in driving the evolution of avian song frequency across a latitudinal gradient.

@article{Weir2012TheRO,
  title={The role of ecological constraint in driving the evolution of avian song frequency across a latitudinal gradient.},
  author={Jason T. Weir and David J. Wheatcroft and T. Douglas Price},
  journal={Evolution; international journal of organic evolution},
  year={2012},
  volume={66 9},
  pages={2773-83}
}
Just as features of the physical and biotic environment constrain evolution of ecological and morphological traits, they may also affect evolution of communication systems. Here we analyze constraints on rates of vocal evolution, using a large dataset of New World avian sister taxa. We show that species breeding in tropical forests sing at generally lower frequencies and across narrower bandwidths than species breeding in open habitats, or at high latitudes. We attribute these restrictions on… CONTINUE READING