Bromeliad (IMAGE) University of British Columbia Caption Scientists used the insect larvae that live in the water trapped by bromeliad plants as a model ecosystem, discovering that food webs become top-heavy with predators when there are large day-to-day variations in rainfall. Credit The Bromeliad Working Group/UBC. 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.