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Africa: Finding pathways for sustainable development
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Finding pathways for sustainable development in Africa
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Credit: Trevor Fristoe and Mark van Kleunen
Invasive alien plants are plant species that grow in an environment outside their native habitat. If they successfully establish self-sustaining populations in these new environments - an event called naturalization - they can have considerable negative impacts on local ecosystems, economies, and societies. But not all alien plant species are equally effective in invading new habitats. Therefore, an international team of scientists, headed by Konstanz-based biologist Professor Mark van Kleunen, investigated different types of invasiveness and possible factors that determine invasion success of alien plants in Europe.
The new study, published in
Landscape shows earliest effects of modern humans using fire to shape ecosystem
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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.