Mercury in Aquatic Ecosystems
scientist collecting samples of aquatic species from the Pike River, Wisconsin, for later analysis of mercury contamination
The location of the maximum methylmercury concentration at depth in the Pacific Ocean
was the first evidence noted by the researchers pointing to the new methylation cycle. The graphic shows sampling depth on the left (in meters), and oxygen concentration on the right (in micromoles
per kilogram of seawater [µmol/kg]) along a north-south latitudinal transect in the eastern North Pacific Ocean. The specific depth of maximal methylmercury concentration was consistently found at the ocean depth where the most rapid loss of oxygen was also observed. The process linking these two observations is microbial decomposition of "ocean rain", which is settling algae produced near the surface of the ocean. The decomposition process consumes oxygen from the water, but also leads to unintended methylmercury production.
Does mercury affect aquatic life in the Florida Everglades?. USGS
scientists are studying the fate and transport of mercury to find the answer to the question.
scientists using ultra-clean techniques to collect water samples for the analysis of trace levels of mercury and methylmercury.
scientists collecting water samples for analysis of mercury in high altitude (approximately 10,000 feet) lakes in the Rocky Mountains.
scientists sampled lakes in the Rocky Mountains for mercury and methylmercury.
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