Lake Nästjärn, a Swedish Boreal Lake (image) Umea University Share Print E-Mail Caption Anne Deininger has studied how nitrogen deposition affects food webs of boreal lakes. Here: sampling at lake Nästjärn. Credit Marcus Klaus Usage Restrictions This photo may be used, but only in contexts related to this news release. Please, give credit to the photographer where possible. 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.