From lakes to rates of vegetation change (IMAGE) The University of Bergen Caption Fossil pollen records offer our best insights into past rates of vegetation change. A lake, or other suitable environment, is cored to retrieve the layered sediments which contain pollen grains that accumulated over thousands of years. By identifying and counting the different pollen grains researchers can then reconstruct the local vegetation composition. Finally, the rate of vegetation change is estimated from the changes in pollen abundances through time. Credit Artwork by Milan Teunissen van Manen (@MilanTvM). Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.