Algal Bloom in the York River (IMAGE) Virginia Institute of Marine Science Caption An exceptionally dense algal bloom along the north shore of the York River. These blooms are caused by excess nutrients entering the Bay and contribute to dead zones that suffocate marine life. Photo by Wolfgang Vogelbein. Credit Wolfgang Vogelbein, Virginia Institute of Marine Science Usage Restrictions This image may only be used in conjunction with reporting on the study detailed in the associated press release. License Original 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.