The Geoscience seminar this week (Friday 22nd) will be given by professor Mikael Fortelius. Mikael will talk about his recent research from Turkana Basin (abstract below).
Location: D114, Physicum, Kumpula Campus
Title: AN ECOMETRIC ANALYSIS OF THE FOSSIL MAMMAL RECORD OF THE TURKANA BASIN
All are most welcome!
Although ecometric methods have been used to analyse fossil mammal faunas and environments of Eurasia and North America, such methods have not yet been applied to the rich fossil mammal record of East Africa. Here we report results from analysis of a combined dataset spanning east and west Turkana from Kenya between 7 and 1 million years ago. We provide temporally and spatially resolved estimates of temperature and precipitation and discuss their relationship to patterns of faunal change and propose a new hypothesis to explain the lack of a temperature trend. We suggest that the regionally arid Turkana Basin may between 4 and 2 million years ago have acted as a ‘Species Factory’, generating ecological adaptations in advance of the global trend. We show a persistent difference between the eastern and western sides of the Turkana Basin and suggest that the wetlands of the shallow eastern side could have provided additional humidity to the terrestrial ecosystems. Pending further research, a transient episode of faunal change centred at the time of the KBS member (1.87-1.53 million years ago) may be equally plausibly attributed to climate change or to a top-down ecological cascade initiated by the entry of technologically sophisticated humans.