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 E-Mail IMAGE: Recently collected cores sit in the back of an old truck after they were drilled from an ancient lake bed in Afar, Ethiopia. view more  Credit: Sarah Ivory, Penn State Ancient pollen samples and a new statistical approach may shed light on the global rate of change of vegetation and eventually on how much climate change and humans have played a part in altering landscapes, according to an international team of researchers. We know that climate and people interact with natural ecosystems and change them, said Sarah Ivory, assistant professor of geosciences and associate in the Earth and Environmental Systems Institute, Penn State. Typically, we go to some particular location and study this by teasing apart these influences. In particular, we know that the impact people have goes back much earlier than what is typically accepted as the case. However, we haven t been able to observe the patterns created by these processes globally or long-term.

United statesCzech republicNoord hollandAustralian capital territorySimon heberleSimon goringAlastair wr seddonPetr kuneSteffen woltersKuberp bhattaThomas gieseckeSarah ivoryViviana feldeSuzette ga flantuaJohnw williamsHenry hoogheimstra