300 dpi: (d1871-21.jpg)
640 pixels wide: (d1871-21.jpg)
 Image Number D1871-21 |
University of Maryland-Eastern Shore (UMES) scientist Eric May (right) retrieves a plankton net from the water while Penn State graduate student Sarah Gustafson and ARS hydrologist Tony Buda conduct water-quality sampling in a tributary of Maryland’s Manokin River. These samples will be used in studies that examine whether urea pollution in the watershed is linked to periodic blooms of phytoplankton known as Pseudo nitzschia species.
Photo by Stephen Ausmus.
