Did an increasingly carnivorous Homo erectus cause Pleistocene mammal extinctions in eastern Africa?
This project combines dental enamel isotopes and ecomorphology to determine which Turkana Basin herbivore species were being consumed by which fossil carnivore species, with an ultimate goal of determining which carnivores were in direct competition with Homo ergaster/erectus. We aim to test whether increased hominin carnivory caused a trophic disruption that led to a cascade of extinctions of herbivore and carnivore species.
Paleoecology and Paleoanthropology of Laikipia, Kenya
PI Barr directs field research at a probable late Miocene site known as Tumbili Estate. This project provides a new window into the poorly known late Miocene, the interval during which hominins diverged from our ape relatives.
Characterizing landscape mosaics in modern African ecosystems
Postdoctoral researcher Negash conducts field research in national parks in Ethiopia, Rwanda, Uganda and Mozambique. This project involves combining carbon isotope studies and spatial analysis to quantitatively characterize different vegetation mosaics in modern African ecosystems. The aim of the project is to produce a model for predicting vegetation mosaic types from the fossil record.
Paleoecology and Paleoanthropology of Mille-Logya Ethiopia
PI Barr conducts fieldwork at this site with an international team of researchers lead by Dr. Zeray Alemseged. Sediments at Mille-Logya date from ca. 2.9 - 2.3 Ma, providing new information from this period which saw the extinction of Australopithecus afarensis and the origin of Homo.
3D comparative osteology collection
Lab members including several undergraduates are actively involved in scanning and curating a large comparative osteology collection drawn mainly from the Smithonian National Museum of Natural History using Einscan Pro Structured Light Scanners.