Tag Archives: population genetics

When less might be more: The evolution of reduced genomes

Images courtesy of wiki commons The advent of affordable genome sequencing has provided us with a wealth of data. Researchers have sequenced everything from Escherichia coli (4.6 Mbp genome size), to sea urchins (810 Mbp), chimpanzees (3.3 Gbp), and humans (3.2 … Continue reading

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Posted in adaptation, Coevolution, evolution, genomics, microbiology, population genetics, selection | Tagged , , , | Leave a comment

Shared patterns of genomic diversity across populations of distantly related taxa

Genomic diversity is shaped by the complex interplay between the effects of genetic drift and natural selection among populations. Several of these effects, especially those of linked selection at neutral sites, adaptive introgression, and barriers to migration (often called “genomic … Continue reading

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Posted in adaptation, bioinformatics, birds, evolution, genomics, population genetics, selection | Tagged , , , , , | Leave a comment

Deep in the meadow, under the … seagrass, a bed of temporally stable diversity?

Genetically diverse populations are often more stable and productive. For habitat-forming organisms, such as seagrasses, this results in increased habitat complexity and more abundant associated communities (e.g., Hughes and Stachowicz 2004, Reusch et al. 2005).  Spatial patterns of genetic diversity … Continue reading

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Posted in adaptation, community ecology, conservation, evolution, phylogeography, population genetics | Tagged , , , , , , | Leave a comment

Have we got the power?

Sabrina Heiser wrote this post as a final project for Stacy Krueger-Hadfield’s Science Communication course at the University of Alabama at Birmingham. Sabrina grew up in Germany, completed a BSc (Hons) in Marine Biology at Plymouth University (UK) and then lived … Continue reading

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Posted in blogging, community ecology, evolution, haploid-diploid, natural history, NSF, population genetics | Tagged , , , , , , , | Leave a comment

Divergence and Linked Background Selection

We have widely discussed the reduction in neutral diversity due to demography and linked selection effects (e.g. selective sweeps and hitchhiking, or background selection) in several previous posts (e.g see here, here, and here). However, how linked selection affects neutral divergence … Continue reading

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Posted in evolution, genomics, methods, selection, speciation, theory | Tagged , , , , , | 1 Comment

On (mis)interpreting STRUCTURE/ADMIXTURE results

STRUCTURE, ADMIXTURE and other similar software are among the most cited programs in modern population genomics. They are algorithms that estimate allele frequencies and admixture proportions under the premise that sampled genotypes are derived from one of “K” ancestral populations, … Continue reading

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Posted in bioinformatics, genomics, howto, methods, population genetics, software, STRUCTURE | Tagged , , , , | 1 Comment

What do dolphins, bivalves and algae have in common?

Collaboration as it turns out, between three scientists interested in vertebrates, invertebrates and algae! A few days before we left for Evolution 2016 in Austin, one of my collaborators, Eric Pante, came to Charleston as the final stop in a North American … Continue reading

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Posted in bioinformatics, blogging, career, conferences, DNA barcoding, haploid-diploid, natural history, phylogenetics, phylogeography, population genetics | Tagged , , , , , | Leave a comment