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On oscillations and flutterings-A reply to Hamm and Fordyce

Janz, Niklas; Braga, Mariana P.; Wahlberg, Niklas LU and Nylin, Sören (2016) In Evolution 70(5). p.1150-1155
Abstract

The diversification of plant-feeding insects is seen as a spectacular example of evolutionary radiation. Hence, developing hypotheses to explain this diversification, and methods to test them, is an important undertaking. Some years ago, we presented the oscillation hypothesis as a general process that could drive diversification of this and similar interactions, through repeated expansions and contractions of host ranges. Hamm and Fordyce recently presented a study with the outspoken intention of testing this hypothesis where they concluded that the oscillation hypothesis was not supported. We point out several problems with their study, owing both to a misrepresentation of our hypothesis and to the methods. We provide a clarifying... (More)

The diversification of plant-feeding insects is seen as a spectacular example of evolutionary radiation. Hence, developing hypotheses to explain this diversification, and methods to test them, is an important undertaking. Some years ago, we presented the oscillation hypothesis as a general process that could drive diversification of this and similar interactions, through repeated expansions and contractions of host ranges. Hamm and Fordyce recently presented a study with the outspoken intention of testing this hypothesis where they concluded that the oscillation hypothesis was not supported. We point out several problems with their study, owing both to a misrepresentation of our hypothesis and to the methods. We provide a clarifying description of the oscillation hypothesis, and detail some predictions that follow from it. A reanalysis of the data demonstrated a troubling sensitivity of the "SSE" class of models to small changes in model specification, and we caution against using them for tests of trait-based diversification. Future tests of the hypothesis also need to better acknowledge the processes behind the host range oscillations. We suspect that doing so will resolve some of the apparent conflicts between our hypothesis and the view presented by Hamm and Fordyce.

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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Coevolution, Herbivory, Phylogenetics, Speciation
in
Evolution
volume
70
issue
5
pages
6 pages
publisher
Wiley-Blackwell
external identifiers
  • Scopus:84965047363
ISSN
0014-3820
DOI
10.1111/evo.12927
language
English
LU publication?
yes
id
bc314010-fb17-4b64-ae49-9099986145ed
date added to LUP
2016-09-08 12:12:54
date last changed
2016-09-29 08:53:30
@misc{bc314010-fb17-4b64-ae49-9099986145ed,
  abstract     = {<p>The diversification of plant-feeding insects is seen as a spectacular example of evolutionary radiation. Hence, developing hypotheses to explain this diversification, and methods to test them, is an important undertaking. Some years ago, we presented the oscillation hypothesis as a general process that could drive diversification of this and similar interactions, through repeated expansions and contractions of host ranges. Hamm and Fordyce recently presented a study with the outspoken intention of testing this hypothesis where they concluded that the oscillation hypothesis was not supported. We point out several problems with their study, owing both to a misrepresentation of our hypothesis and to the methods. We provide a clarifying description of the oscillation hypothesis, and detail some predictions that follow from it. A reanalysis of the data demonstrated a troubling sensitivity of the "SSE" class of models to small changes in model specification, and we caution against using them for tests of trait-based diversification. Future tests of the hypothesis also need to better acknowledge the processes behind the host range oscillations. We suspect that doing so will resolve some of the apparent conflicts between our hypothesis and the view presented by Hamm and Fordyce.</p>},
  author       = {Janz, Niklas and Braga, Mariana P. and Wahlberg, Niklas and Nylin, Sören},
  issn         = {0014-3820},
  keyword      = {Coevolution,Herbivory,Phylogenetics,Speciation},
  language     = {eng},
  month        = {05},
  number       = {5},
  pages        = {1150--1155},
  publisher    = {ARRAY(0x9a840a8)},
  series       = {Evolution},
  title        = {On oscillations and flutterings-A reply to Hamm and Fordyce},
  url          = {http://dx.doi.org/10.1111/evo.12927},
  volume       = {70},
  year         = {2016},
}