Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 423642
Title Radiations and key innovations in an early branching angiosperm lineage (Annonaceae; Magnoliales)
Author(s) Erkens, R.H.J.; Chatrou, L.W.; Couvreur, T.L.P.
Source Botanical Journal of the Linnean Society 169 (2012)1. - ISSN 0024-4074 - p. 117 - 134.
DOI http://dx.doi.org/10.1111/j.1095-8339.2012.01223.x
Department(s) Biosystematics
Publication type Refereed Article in a scientific journal
Publication year 2012
Keyword(s) rain-forest trees - species-rich genus - adaptive radiation - diversification rates - rapid diversification - goniothalamus annonaceae - molecular phylogenetics - ecological opportunity - guatteria annonaceae - flowering plants
Abstract Biologists are fascinated by species-rich groups and have attempted to discover the causes for their abundant diversification. Comprehension of the causes and mechanisms underpinning radiations and detection of their frequency will contribute greatly to the understanding of the evolutionary origin of biodiversity and its ecological structure. A dated and well-resolved phylogenetic tree of Annonaceae was used to study diversification patterns in the family in order to identify factors that drive speciation and the evolution of morphological (key) characters. It was found that, except for Goniothalamus, the largest genera in the family are not the result of radiations. Furthermore, the difference in species numbers between subfamilies Annonoideae (former long branch clade) and Malmeoideae (former short branch clade) cannot be attributed to significant differences in the diversification rate. Most of the speciation in Annonaceae is not distinguishable from a random branching process (i.e. chance), and no special explanations are therefore necessary for the distribution of species richness across the major part of the phylogenetic tree for Annonaceae. Only for a small number of clades can key innovations be invoked to explain the elevated rate of diversification
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