I. Owens

Publications93
h-index59
Citations13,018
Highly Influential Citations726
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Extra pair paternity in birds: a review of interspecific variation and adaptive function
TLDR
The remaining challenges of understanding the relative roles of genes and ecology in determining variation between taxa in the rate of extra paternity are highlighted, and testing for differences between extra‐pair offspring and those sired within‐pair is highlighted.
Global hotspots of species richness are not congruent with endemism or threat
TLDR
It is demonstrated that hotspots of species richness, threat and endemism do not show the same geographical distribution and this suggests that, even within a single taxonomic class, different mechanisms are responsible for the origin and maintenance of different aspects of diversity.
Cooperative breeding in birds: a comparative test of the life history hypothesis
TLDR
It is suggested that low annual mortality is the key factor that predisposes avian lineages to cooperative breeding, then ecological changes, such as becoming sedentary, further slow population turnover and reduce opportunities for independent breeding are suggested.
Evolutionary Ecology of Birds: Life Histories, Mating Systems and Extinction
TLDR
A comparison study of comparative methods and empirical evidence of variation in mating systems and sexual dimorphism among living species found in the literature confirmed the need for further research into this topic.
Ecological basis of extinction risk in birds: habitat loss versus human persecution and introduced predators.
  • I. Owens, P. Bennett
  • Biology, Medicine
    Proceedings of the National Academy of Sciences…
  • 24 October 2000
TLDR
The results demonstrate the importance of considering separately the multiple mechanisms that underlie contemporary patterns of extinction and reveal why it has previously proven so difficult to identify simple ecological correlates of overall extinction risk.
Contrasting levels of extra-pair paternity in mainland and island populations of the house sparrow (Passer domesticus): is there an «island effect»?
TLDR
The analysis of the genetic mating system of two populations of the house sparrow and uses the results from four other populations to test existing hypotheses using an intra-specific comparative approach to find no effect of breeding density and genetic variation on the level of extra-pair paternity.
Ecology Predicts Large‐Scale Patterns of Phylogenetic Diversification in Birds
TLDR
It is shown that diversification rate possesses an intermediate phylogenetic signal across families, and this results suggest that large‐scale patterns in avian diversification can be explained by variation in intrinsic biology.
Sexual dimorphism in birds: why are there so many different forms of dimorphism?
TLDR
The results suggest that size dimorphism is associated with the sort of intrasexual competition described by traditional classifications of social mating system, whereas plumage–colour dimorphisms is associatedWith cryptic female choice.
Global biogeography and ecology of body size in birds.
TLDR
The first assemblage-level global examination of 'Bergmann's rule' within an entire animal class suggests that global patterns of body size in avian assemblages are driven by interactions between the physiological demands of the environment, resource availability, species richness and taxonomic turnover among lineages.
Species richness among birds: body size, life history, sexual selection or ecology?
TLDR
Comparisons between sister taxa are used to test predictions arising from six explanations to the puzzle of why some avian families contain so many more species than other families, finding no support for the idea that differences in species richness are simply due to chance, and high extinction rates are not inevitably associated with low speciation rates.
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