Dr. Jacqueline Grebmeier presents an overview of the arctic ocean ecosystem. She outlines the key environmental factors influencing arctic marine food webs and discusses recent changes in biogeochemical cycles, biodiversity, migration and range of species, and general ecosystem health in the region.
The sediment in Lake El'gygytgyn, (pronounced EL-ge-GIT-gin) located in NE Siberia, holds one of the longest records of climate change anywhere in the continental Arctic. How does sediment (clay and mud) tell us something about past climate? Proxy data! By studying the microfossils of diatoms and pollen in the sediment, we can re-construct the lake environment millions of