Comparing rates of vegetation change (IMAGE) The University of Bergen Caption . In biodiversity science, a key question is understanding how quickly ecosystems change over time. Ecosystems that undergo large changes in species composition in a very short time will have high rates of change. 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.