22 | 04 | 2018

Other research projects

In 2012 I started a postdoctoral research at the NMNH, under the supervision of Dr. Vicki Funk, to investigate diversity patterns in the flora of the Guiana Shield. This is part of the Biological Diversity of the Guiana Shield Program (http://botany.si.edu/bdg/). I focused my attention to directional turnover along gradients and non-directional variation. I compiled a database of ~188,000 records to run all the GIS analyses. Currently we are preparing a manuscript that will be submitted within the following two months. 

Also, I have worked on the phylogenetic and biogeographic relationships of: Ammannia, Hionanthera, Nesaea, and Rotala (Lythraceae, paper published); Gochnatia (Compositae, paper submitted); Ludwigia (Onagraceae, manuscript in prep.); and Sideritis (Lamiaceae; one paper in press); and Fusarium mitochondrial genomes (manuscript in prep.).

me collectingOther past projects:

Origin and evolution of Ludwigia (Onagraceae)
PI: Janet C. Barber, Ph.D. and Peter Hoch, Ph.D.
The genus Ludwigia (Onagraceae) has a cosmopolitan distribution and comprises 82 species that grow in wet temperate and tropical environments. Ludwigia is morphologically, chromosomally and phylogenetically distinct within Onagraceae, and relationships within the genus are not known. The major objectives of this project are to reconstruct a phylogeny of Ludwigia using molecular (chloroplast and nuclear) datasets; test monophyly of the established sections to determine whether they are natural groups or simply geographic entities; elucidate patterns of chromosome evolution and pollen form; and determine the origin of the genus and, by inference, of the family itself.

Chromosomal evolution in Macaronesian Sideritis L. (Lamiaceae)
PI: Janet C. Barber, Ph.D.
This project proposes to use molecular cytogenetic methods to investigate chromosomal change in the Macaronesian species of the plant genus Sideritis (Lamiaceae). The group comprises 23 species of that are endemic to the archipelagoes of Madeira and the Canary Islands. Like their more familiar Pacific island counterparts, Macaronesian Sideritis are highly diverse, both morphologically and ecologically, and they bear little resemblance to their continental relatives. Chromosomally, however, this group is unique. Whereas most island plant groups show little or no diversity in chromosome number, nine different diploid numbers have been documented for Macaronesian Sideritis, establishing it as the most chromosomally diverse plant group known from island floras.

Flora of the Bojonawi Natural Reserve (Orinoco, Colombia)
I have been inventoried the flora of this reserve since 2003. The study area is located in the Orinoco Basin, 20 miles South from Puerto Carreño, in the Colombian side. It has rocky mountains pertained to the Guyana Shield, gallery forest, extensive savanas, palmettos and other typical ecosystems. The flora of the region is barely known, being this one of the few complete inventories. Raw data suggest the presence of more than 400 species of angiosperms, with 125 used species by the local indigenous and white communities.

Please This email address is being protected from spambots. You need JavaScript enabled to view it. if you wish to know more about my current or previous researches.

These are some of my codes and tips you might find useful:  GREP formulas  |  Dendropy.  Coming soon: R Codes  |  PAUP codes  |  Nexus for MrBayes  |  Garli codes  |  Python codes for GIS. 

Postdoctoral researcher | Botany | National Museum of Natural History | Smithsonian Institution
PO Box 37012, Washington DC 20013 | Phone: (202)633-0951 | Email: espeletias@gmail.com
Useful links
Interactive Digital Key for Espeletiinae

Access to the key HERE

key 160x112


Gallery of Espeletiinae

With 5000 pics, this is the World's largest collection of photographs of Espeletiinae (a.k.a. frailejones). Check it out HERE!


Recent recommended papers

Read this paper by Madriñán et al. (2013): Páramo is the world's fastest evolving and coolest biodiversity hotspot.

My latest publication

This is my latest paper (Diazgranados & Morillo, 2013): A new species of Coespeletia (Asteraceae, Millerieae) from Venezuela. Check it out!

Latest organized event

The first Symposium of Biogeography of Neotropical Plants in Colombia was a total success! (Diazgranados & Funk, 2013)