Uncommon Ground


The beauty of fynbos

The beauty of our fynbos from CapeNature on Vimeo.

In case you’ve ever wondered why I have spent so much time working in, thinking about, and writing about Protea this video from CapeNature will give you a bit of a clue. The fynbos is a very interesting place. It has an enormous diversity of plants, many of which are found nowhere else in the world, and much of that diversity is concentrated in a relatively small number of big evolutionary radiations, one of which is Protea.1 One of my students,

Kristen Nolting (@KristenNolting on Twitter) pointed me to this video. Thanks, Kristen.


A new phylogeny for Protea

Protea compacta

Protea compacta near Kleinmond, Western Cape, South Africa

The genus Protea is one of the iconic evolutionary radiations in the Greater Cape Floristic Region of southwestern South Africa. Its range extends north through Mozambique into parts of central Africa, but the vast majority of species are found in South Africa. From 2011-2014 we collected samples from most of the South African species (59 in total), and for most of the species we collected samples from several individuals from different populations. Over the last couple of years, we extracted DNA, built libraries for next generation sequencing using targeted phylogenomics, and constructed a highly-resolved estimate of phylogenetic relationships in the genus. The paper describing our results is now out in “early view” in American Journal of Botany. Most species from which we have multiple samples are supported as monophyletic units, and most relationships we identify are strongly supported (> 90% support in ASTRAL-II and SVDquartets analyses). We use the species tree from our data as a backbone to provide reliable estimates of relationship for additional species included in a paper by Schnitzler and colleagues for which we did not have samples.

Mitchell, N., P.O. Lewis, E.M. Lemmon, A.R. Lemmon, and K.E. Holsinger.  2017.  Anchored phylogenomics improves the resolution of evolutionary relationships in the rapid radiation of Protea L. American Journal of Botany doi: 10.3732/ajb.1600227

Summary of tweeting from #Botany2016

Twitter activity for #Botany2016 has declined now that the conference has been over for a couple of days.


Spirts remained high throughout the runup to the conference, dipping below zero only once about a week before everyone arrived.


@JChrisPires contributed a larger number of tweets (including tweets of others that he retweeted) than anyone else,


but @uribe_convers had a larger impact, regardless of whether you measure impact in number of retweets


or in terms of number of likes


If you’d like to play around with the code, it’s available in Github: https://github.com/kholsinger/Twitter-stats.