Agricultural practices pose threats to biotic diversity in freshwater systems with increasing
use of glyphosate-based herbicides for weed control and animal waste for soil amendment …

A series of legal decisions culminated in 2002 with the California State Water Resources
Control Board funding the San Francisco Estuary Institute to develop and implement a 3 …

ABSTRACT Glyphosate, aminomethylphosphonic acid (AMPA), imazapyr, sulfometuron
methyl (SMM), and metsulfuron methyl (MSM) were measured in streamwater collected …

Nuisance growths of aquatic plants in Canadian surface waters continue to be problematic.
Only diquat, a contact herbicide that is used to control many free-floating plants (but is less …

Herbicides are often detected in watersheds at concentrations that are toxic to
phytoplankton, potentially causing indirect effects on higher trophic organisms. The long …

Public awareness of worldwide increase herbicides use and their adverse effects on
ecosystems has been growing over the past decades. Herbicides may reach water bodies …

Concentrations of glyphosate observed in the environment are generally lower than those
found to exert toxicity on aquatic organisms in the laboratory. Toxicity is often tested in the …

Glyphosate in surface waters of southern Ontario (Canada) was studied over a 2-year
period. A small percentage of samples exhibited glyphosate concentrations greater than the …

The Salinas River is the largest of the three rivers that drain into the Monterey Bay National
Marine Sanctuary in central California. Large areas of this watershed are cultivated year …

The Alamo and New Rivers located in the Imperial Valley, California receive large volumes
of irrigation runoff and discharge into the ecologically sensitive Salton Sea. Between 1993 …