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School of Natural Resources Seminar Series

Biogeochemical cycling, toxin trickery, and ecosystem processes in headwater streams

3:30 pm
Hardin Hall Room: 107 South (Auditorium)
Additional Info: HARH
John Benson,
Presented by Keeley MacNeill, Environmental Science Lecturer , School of Natural Resources | University of Nebraska-Lincoln

Elemental cycling is fundamental to life and provides insight into ecosystem condition and function. We have long known that the cycles of elements, both nutrients and toxic elements, are intimately linked, not only to other elements and their biogeochemical cycles, but to important ecosystem processes like metabolism. My research uses the relative availability of nutrients (including carbon, nitrogen and phosphorus) as well as their interactions with toxic elements (like arsenic) to explore questions about the uptake, storage, and transport of elements as well as the general function of streams and stream food webs. In this seminar, I will share results from my research on why climate regime matters for stream nutrient cycling and how relative availability of nitrogen and phosphorus can drive arsenic retention. I will also talk about the interaction between terrestrial predator, browser, and vegetation dynamics in Yellowstone National Park impact stream ecosystem functioning.

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This event originated in SNR Seminars & Discussions.