Survival of the Fittest (image) Brown University Share Print E-Mail Caption An iceplant, from a region of high diversity in South Africa, is overtopping and killing a native shrub on the New Zealand coast, a region with far less diversity. Species that have had to struggle against robust competition are strong invaders in areas where natives have had an easier time evolutionarily. Credit Jason Fridley Usage Restrictions with credit Share Print E-Mail 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.