Parallel adaptations to nectarivory in parrots, key innovations and the diversification of the Loriinae

Schweizer, Manuel; Güntert, Marcel; Seehausen, Ole; Leuenberger, Christoph; Hertwig, Stefan (2014). Parallel adaptations to nectarivory in parrots, key innovations and the diversification of the Loriinae. Ecology and evolution, 4(14), pp. 2867-2883. John Wiley & Sons, Inc. 10.1002/ece3.1131

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Specialization to nectarivory is associated with radiations within different bird groups, including parrots. One of them, the Australasian lories, were shown to be unexpectedly species rich. Their shift to nectarivory may have created an ecological opportunity promoting species proliferation. Several morphological specializations of the feeding tract to nectarivory have been described for parrots. However, they have never been assessed in a quantitative framework considering phylogenetic nonindependence. Using a phylogenetic comparative approach with broad taxon sampling and 15 continuous characters of the digestive tract, we demonstrate that nectarivorous parrots differ in several traits from the remaining parrots. These trait-changes indicate phenotype–environment correlations and parallel evolution, and may reflect adaptations to feed effectively on nectar. Moreover, the diet shift was associated with significant trait shifts at the base of the radiation of the lories, as shown by an alternative statistical approach. Their diet shift might be considered as an evolutionary key innovation which promoted significant non-adaptive lineage diversification through allopatric partitioning of the same new niche. The lack of increased rates of cladogenesis in other nectarivorous parrots indicates that evolutionary innovations need not be associated one-to-one with diversification events.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Department of Biology > Institute of Ecology and Evolution (IEE)
08 Faculty of Science > Department of Biology > Institute of Ecology and Evolution (IEE) > Aquatic Ecology

UniBE Contributor:

Güntert, Marcel; Seehausen, Ole and Hertwig, Stefan

Subjects:

500 Science > 570 Life sciences; biology

ISSN:

2045-7758

Publisher:

John Wiley & Sons, Inc.

Language:

English

Submitter:

Marcel Häsler

Date Deposited:

21 Jul 2015 08:10

Last Modified:

21 Jul 2015 08:10

Publisher DOI:

10.1002/ece3.1131

PubMed ID:

25165525

BORIS DOI:

10.7892/boris.70371

URI:

https://boris.unibe.ch/id/eprint/70371

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