Diatom Growth (image) University of Washington Share Print E-Mail Caption Black circles and triangles show the growth of diatoms collected from Golden Gardens in Seattle and Penn Cove on Whidbey Island, respectively. White circles and triangles are those same populations with the addition of sulfitobacter. Credit V. Armbrust / Univ. of Washington 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.