Tag Archives: landscape genetics

The biggest problem in landscape genetics and how to fix it

Landscape genetics is a field that has expanded rapidly in recent years, but that doesn’t mean that it hasn’t gone without criticism. Perhaps the largest problem with landscape genetics (LG) studies is one of timing. If you observe genetic differentiation … Continue reading

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Posted in methods, Molecular Ecology, the journal, population genetics | Tagged , | 2 Comments

Long distance dispersal of modern humans outside of Africa

Long distance dispersal (LDD) has long known to be an artifact of human migrations out of Africa. However, the effects of LDD on modern human diversity, and models of LDD in human colonization are yet to be characterized. Using an … Continue reading

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Posted in evolution, genomics, natural history, population genetics | Tagged , , , , , | 2 Comments

Anti-predatory adaptations in sticklebacks and butterflies

Two recent studies analyze character shifts in response to different selection regimes – (1) Mullerian mimicry wing patterns in Heliconius butterflies, and (2) anti-intraguild-predator adaptations in armor and shape of threespine sticklebacks. Hoyal Cuthill and Charleston 2015 Wing patterning genes … Continue reading

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Posted in adaptation, Coevolution, evolution, genomics, natural history, phylogenetics, phylogeography, population genetics, selection, speciation | Tagged , , , | Leave a comment

Landscape genetics shows that Tanzanian forest monkeys feel the heat of human influence

A new publication appearing in Heredity applies new methods for associating population genetic data with landscape resistance to an tropical, endangered species. The authors utilize multiple measurements of landscape resistance, like forest cover and distance from the nearest village, to select the … Continue reading

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Posted in conservation, methods, population genetics | Tagged | 1 Comment

Environmental association analyses: a practical guide for a practical guide

Obtaining extensive SNP data for your organism of choice isn’t such a feat these days, but actually matching that breadth of data with appropriate analyses is still a challenge. Fortunately, there has been an avalanche of new methods to make … Continue reading

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Posted in adaptation, association genetics, methods, Molecular Ecology, the journal | Tagged | Leave a comment

Should we use Mantel tests in molecular ecology?

No. Stop. At least that is the message from a new publication in Methods in Ecology and Evolution by Pierre Legendre and colleagues (pay-walled, but I found a pdf here). Mantel tests should simply not be used to test hypotheses … Continue reading

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Posted in Uncategorized | Tagged , , | 2 Comments

marmap

A couple years ago, Benoit Simon-Bouhet ended up sharing an office with Eric Pante, then a post-doc fellow in his former lab. The two quickly realized they were in a lab in which few people had the expertise or taste for coding. Thus, on … Continue reading

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Posted in community ecology, conservation, evolution, howto, natural history, R, software | Tagged , , , , | Leave a comment

IBE/IBD Contour plots in R

Rob’s post from yesterday motivated me to find an alternate way of visualizing correlations between matrices of geographical or ecological data, and genetic data. I have seen plenty of Mantel, or partial Mantel tests of correlation, as well as plots … Continue reading

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Posted in bioinformatics, howto, population genetics, R, software | Tagged , , , | 5 Comments

Landscape genetics gets existential

I had a lot of ideas for future posts, but “landscape genetics” keeps pulling me back. Beyond the new methodology, reviews, and empirical findings, I suppose someone has to pump the brakes and get more existential. Rodney Dyer does just … Continue reading

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Posted in Molecular Ecology views, Molecular Ecology, the journal, population genetics | Tagged , | 1 Comment

Gene flow and Population Fitness

Fitness effects of gene flow (both advantageous and deleterious) have garnered plenty of recent press and scientific exploration. At the population level, the concepts and consequences are notoriously familiar. In the context of immigration, they reduce to existing genetic variation, … Continue reading

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Posted in adaptation, evolution, genomics, natural history, population genetics, selection, speciation, theory | Tagged , , , , , | 1 Comment