J Doubeck

Jon Doubek, a PH.D. candidate in Biological Sciences at Virginia Tech, is a fellow in the Interfaces of Global Change Program and the Global Lake Ecological Observatory Network (GLEON).

Jon’s GLEON Fellowship Program trains small cohorts of graduate students from around the world to analyze large and diverse data sets, operate effectively in diverse international teams, and communicate science to researchers, the public, and managers. In addition to taking part in three international workshops, Jon is completing interdisciplinary, collaborative scientific projects with the group.

We are proud to announce that the first paper from the GLEON Graduate Student Fellowship Program came out this week in PNAS, and Jon is a co-author. The paper is titled, “Salting our freshwater lakes”. Congratulations, Jon!


“In lakes, chloride is a relatively benign ion at low concentrations but begins to have ecological impacts as concentrations rise into the 100s and 1,000s of mg L−1. In this study, we investigate long-term chloride trends in 371 freshwater lakes in North America. We find that in Midwest and Northeast North America, most urban lakes and rural lakes that are surrounded by >1% impervious land cover show increasing chloride trends. Expanding on this finding, thousands of lakes in these regions are at risk of long-term salinization. Keeping lakes “fresh” is critically important for protecting the ecosystem services freshwater lakes provide, such as drinking water, fisheries, recreation, irrigation, and aquatic habitat.”

Read the full abstract here.