Brackish (Saline) Diatom Species (IMAGE) Queen's University Caption Increases in the Navicula salinarum species at the time of the storm surge show that the lake went from a fresh to a saline-water system. (Highly magnified image: more than 3,000 would fit on the head of a pin.) Credit Joshua Thienpont, Queen's University 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.