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STAR Fellow Studies Mercury Hotspots in the Catskills
Jason Townsend is a Ph.D. student in Conservation Biology at the State University of New York College of Environmental Science and Forestry. His work is funded by a STAR Graduate Research Fellowship.
We have known for some time that mercury is accumulating in Americas waterways and the ocean. Emissions from coal-fired power plants contribute significant amounts of mercury to the atmosphere, and the resulting mercury-laden precipitation is especially severe in parts of the northeastern U.S. that are directly in the line of prevailing winds from the numerous power plants of the Midwest. Accumulation of this potent neuro-toxin poses a threat to wildlife and people through consumption of contaminated fish.
We do not know, however, the extent to which mercury is accumulating in non-aquatic environments - for instance, in forested areas of the Northeast. It is possible that mercury-laden precipitation is accumulating in leaves, soils, and leaf-litter on the forest floor. This could lead to contamination of land-bound wildlife with unknown effects on their reproduction. Accumulation of mercury in forested areas might also contribute significant mercury to waterways for many years to come, as the mercury slowly runs off and leaches into watersheds.
STAR Fellow Jason Townsend is comparing mercury accumulation in several forest types in New Yorks Catskill Mountains. This study takes place in the heavily forested Ashokan Reservoir watershed, an area that provides drinking water to approximately 9 million people in and around New York City. He collects samples of soils, leaves, leaf litter, insects that live in the leaf litter, salamanders that eat the insects of the leaf litter, and blood samples from birds that consume both insects and salamanders. In this way he will be able to identify the amount of biomagnification in the forest the extent to which any mercury that is deposited by rainfall is increasingly concentrated in organisms higher and higher on the food chain. The study takes place at multiple elevations, from the banks of the Ashokan Reservoir at 600 elevation to the headwater streams at the top of the Catskills highest peaks at >4000.
This information will be critical for identifying biological hotspots areas that exceed the mercury levels deemed safe for human and wildlife populations. It will also provide monitoring information to help regulators determine the magnitude of mercury emissions reductions that will be necessary in the coming decades.
For additional information you may contact Jason Townsend at jatownse@syr.edu.