New research by a team of ecologists and hydrologists have shown that water temperatures are increasing in many streams and rivers throughout the United States,aceording to a press release issued Tuesday(4月6日)by the Universitv of Maryland. New research by a team of ecologists and hydrologists have shown that water temperatures are increasing in many streams and rivers throughout the United States, aceording to a press release issued Tuesday (April 6) by the Universitv of Maryland.