Category Archives: speciation

On Integrative Species Delimitation…

Accurate delimitation of species is a fundamental first step that underlies much of what we do in biology. But this can prove challenging in many situations. Why? Let me count the ways. Incomplete lineage sorting, hybridization, morphological conservatism, and niche … Continue reading

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Posted in evolution, methods, phylogeography, population genetics, software, species delimitation | Leave a comment

The slow, and sometimes incomplete, journey to diploidy

Whether you are reading this as a plant, an animal, or fungus, it is likely that some ancestor of yours doubled up on genomes. However, it is likely that these extra genomes disappeared over evolutionary time. What gives? Where are those extra … Continue reading

Posted in evolution, genomics, quantitative genetics, speciation | Tagged , , | 1 Comment

The simpler cichlid: a recent adaptive radiation

If I was asked to name a few of the most compelling systems in evolutionary biology, I’d certainly start with Darwin’s Finches. Next might come peppered moths, African cichlids, stickleback, Caribbean Anolis lizards, or Lenski’s E. coli. What’s interesting about … Continue reading

Posted in adaptation, evolution, selection, speciation | Leave a comment

The rise of the fruit flies – Can good science communication make or break a model system?

The answer is: probably not. It is probably more important that the organism thrives in a lab environment, reproduces and hybridizes with speed and ease, and has some additional “desirable” features: think visible mutations in the fruit fly Drosophila, constant cell … Continue reading

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The Neanderthal admixture plot thickens…

Previous studies of archaic admixture from Altai Neanderthals and Denisovans into modern humans outside of Africa have put forth several lines of evidence for gene flow from Neanderthals into common ancestors of Eurasian populations, from Denisovans into ancestors of modern … Continue reading

Posted in bioinformatics, evolution, genomics, mutation, natural history, next generation sequencing, Paleogenomics, population genetics, speciation | Tagged , , , | 1 Comment

How to build a mimic

The history of evolutionary and ecological studies on mimic species is deep and chock-full of familiar names (Bates, Darwin, Muller, Wallace are just a few). There has also been no limit on the number of jaw-droppingly gorgeous species that have been under … Continue reading

Posted in evolution, population genetics, speciation | Tagged , | 1 Comment

Genomics of Hybridization – Part II, Top three of 2015

Death Valley pupfishes (Cyprinodon) are among the most endangered vertebrates on earth, with small inbred populations, with heavy risks of extinction in extreme environments. Martin et al. (2016) in a recent publication quantify diversity and adaptability in a very small population … Continue reading

Posted in bioinformatics, conservation, genomics, methods, natural history, next generation sequencing, population genetics, R, software, speciation, STRUCTURE, theory | Tagged , , , , | Leave a comment