Microbiology Sampling (image) University of Hawaii at Manoa Share Print E-Mail Caption Sheree Watson and graduate student Catherine Hudson collect microbiological samples to study the effect of nutrient cycling on watercress health. Credit Jennifer Engels Usage Restrictions Image may be only be used with appropriate caption and 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.