Monday 27 June 2011

The Scope of Evolution


Here is another old visualisation from the soon be history EvoViz wiki.

A very crude attempt to show how far evolutionary thinking permeates science from the evolution of organisms themselves, their effect on the environment, it's use in medicine (e.g. understanding the origins of disease), genetic algorithms, evolutionary psychology and politial thinking.



Sunday 12 June 2011

Terrestrial Mammal Geophylogeny - another view

A third visualization of the terrestrial mammal geophlylogeny. Here it is displayed in ArcScene with nodes elevated and coloured by age. I particularly like how it shows differentiation in node age between the southern and northern hemispheres, both within continents and across ocean basins.

Mammal Geophylogeny from David Kidd on Vimeo.

Thursday 9 June 2011

Terrestrial Mammal Geophylogeny

I have been intending to build a geophylogeny from the Bininda-Emonds et al. mammal supertree and range maps (Sechrest "World Wide Global Diversity, Endemism, and Conservation of Mammals". PhD Thesis, Univ. Virginia 2003) but have only got round to doing it. The delay was primarily due to the need to prune the mammal tree to species for which there are range maps. This I have now implemented in the Entangled Bank.

The geophylogney was built in GeophyloBuilder using the range centroids with an envelope model. I have put together two quick visualizations, a map with nodes coloured by age and a movie in ArcGlobe. The map shows a clustering of old nodes toward the center of continents and in ocean basins. The former represent continental endemicity, the latter transcontinental vicariance or dispersal.
In ArcGlobe something strange is going on with branches the cross the inverse-prime meridian, looks like an ESRI bug to me.