On oscillations and flutterings-A reply to Hamm and Fordyce

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On oscillations and flutterings-A reply to Hamm and Fordyce. / Janz, Niklas; Braga, Mariana P.; Wahlberg, Niklas; Nylin, Sören.

In: Evolution, Vol. 70, No. 5, 01.05.2016, p. 1150-1155.

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Janz, Niklas ; Braga, Mariana P. ; Wahlberg, Niklas ; Nylin, Sören. / On oscillations and flutterings-A reply to Hamm and Fordyce. In: Evolution. 2016 ; Vol. 70, No. 5. pp. 1150-1155.

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TY - JOUR

T1 - On oscillations and flutterings-A reply to Hamm and Fordyce

AU - Janz, Niklas

AU - Braga, Mariana P.

AU - Wahlberg, Niklas

AU - Nylin, Sören

PY - 2016/5/1

Y1 - 2016/5/1

N2 - 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.

AB - 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.

KW - Coevolution

KW - Herbivory

KW - Phylogenetics

KW - Speciation

UR - http://www.scopus.com/inward/record.url?scp=84965047363&partnerID=8YFLogxK

U2 - 10.1111/evo.12927

DO - 10.1111/evo.12927

M3 - Article

VL - 70

SP - 1150

EP - 1155

JO - Evolution; international journal of organic evolution

T2 - Evolution; international journal of organic evolution

JF - Evolution; international journal of organic evolution

SN - 1558-5646

IS - 5

ER -