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Human Habitation Increases Vegetation Similarity Between Islands
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Research has shed new light on the impact of humans on Earth’s biodiversity. The findings suggest that the rate of change in an ecosystem’s plant-life increases significantly during the years following human settlement, with the most dramatic changes occurring in locations settled in the last 1500 years.
An international research team studied fossilised pollen dating back 5000 years, extracted from sediments on 27 islands. By analysing the fossils they were able to build up an understanding of the composition of each island’s vegetation and how it changed from the oldest to the most recent pollen samples.
The study was led by Dr Sandra Nogué, Lecturer in Palaeoenvironmental Science at the University of Southampton, UK and Professor Manuel Steinbauer from the University of Bayreuth, Germany and University of Bergen, Norway. PhD student Dr Alvaro Castilla-Beltrán was also a member of the Southampton team.
Humans significantly altered biodiversity on islands, study shows
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Zarrin Ahmed A research team on Tenerife takes sediment cores containing pollen, which revealed the effects of more recent human colonization of the island. Photo by José María Fernández Palacios/University of Bayreuth
April 30 (UPI) An international team of researchers found that humans have significantly altered biodiversity on colonized islands in the past 1,500 years, according to a study published Friday in the journal Science.
By analyzing 27 fossil pollen sequences encompassing 5,000 years from islands across the world, scientists quantified the rates of change in vegetation composition before and after human arrival.