Gordon Holtgrieve, first author of the newly released Science paper.

Nitrogen pollution from human activities can be found in lake bed sediments from over 100 years ago, and in areas thousands of miles away from any city, farm or factory, CoEnv scientists have found.  SAFS’ Gordon Holtgrieve, Daniel Schindler and Lauren Rogers, and others, published these results in the December 16 issue of Science.  Their findings are based on the chemical composition of lake bed sediments from 36 different lakes, and mark both the time and the planetary scale at which nitrogen pollution has effected ecosystems.  Read the UW News story here.