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Assessing the relationships between phylogenetic and functional singularities in sharks (Chondrichthyes) ArchiMer
Cachera, Marie; Le Loc'H, Francois.
The relationships between diversity and ecosystem functioning have become a major focus of science. A crucial issue is to estimate functional diversity, as it is intended to impact ecosystem dynamics and stability. However, depending on the ecosystem, it may be challenging or even impossible to directly measure ecological functions and thus functional diversity. Phylogenetic diversity was recently under consideration as a proxy for functional diversity. Phylogenetic diversity is indeed supposed to match functional diversity if functions are conservative traits along evolution. However, in case of adaptive radiation and/or evolutive convergence, a mismatch may appear between species phylogenetic and functional singularities. Using highly threatened taxa,...
Tipo: Text Palavras-chave: Adaptive radiation; Conservation; Endangered clade; Evolutionary convergence; Niche conservatism; Phylogenetic signal.
Ano: 2017 URL: https://archimer.ifremer.fr/doc/00400/51113/69865.pdf
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Fruits and frugivores of the Brazilian Cerrado: ecological and phylogenetic considerations Acta Botanica
Kuhlmann,Marcelo; Ribeiro,José Felipe.
ABSTRACT Knowing the morphological and phylogenetic patterns of fruits of a plant community may elucidate plant-frugivore interactions, and analysis of dispersal syndromes is a practical approach to understanding these mutualisms. We investigated different zoochorous fruits and frugivorous animals among Cerrado formations (forest, savanna and grassland), mapped dispersal syndromes on a Cerrado angiosperm phylogeny and tested for phylogenetic signal. For a core region in Cerrado, we found that, among almost a thousand fruit species and 258 fruit-eating vertebrates, 60% of the fruits had an ornithochorous syndrome and that 70% of the frugivores were birds. Most fruit and frugivorous species (~80%) inhabit forest formations, but many of them also occurred in...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Cerrado biome; Diaspores; Dispersal syndromes; Forest; Fruit-eating animals; Grassland; Plant-frugivore interactions; Phylogenetic signal; Savanna.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062016000300495
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The best of both worlds: Phylogenetic eigenvector regression and mapping Genet. Mol. Biol.
Diniz Filho,José Alexandre Felizola; Villalobos,Fabricio; Bini,Luis Mauricio.
Eigenfunction analyses have been widely used to model patterns of autocorrelation in time, space and phylogeny. In a phylogenetic context, Diniz-Filho et al. (1998) proposed what they called Phylogenetic Eigenvector Regression (PVR), in which pairwise phylogenetic distances among species are submitted to a Principal Coordinate Analysis, and eigenvectors are then used as explanatory variables in regression, correlation or ANOVAs. More recently, a new approach called Phylogenetic Eigenvector Mapping (PEM) was proposed, with the main advantage of explicitly incorporating a model-based warping in phylogenetic distance in which an Ornstein-Uhlenbeck (O-U) process is fitted to data before eigenvector extraction. Here we compared PVR and PEM in respect to...
Tipo: Info:eu-repo/semantics/report Palavras-chave: Evolutionary models; Phylogenetic comparative methods; Phylogenetic imputation; Phylogenetic signal.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572015000300396
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