CANCELED: Monster Seminar JAM
Dr. Stephen L. Katz, Northwest Fisheries Science Center
High-resolution monitoring data collected over the past 60 years by a single family of Russian scientists on Lake Baikal, Siberia, reveal significant warming of surface waters and long-term changes in the planktonic food web of the worlds largest lake. Increases in water temperature (1.21°C since 1946), chlorophyll a (300% since 1979), and an influential group of zooplankton grazers (335% increase in cladoceran density since 1946) are changes with important implications for nutrient cycling and food web dynamics in this ultra-oligotrophic lake. Although there is increasing, multi-proxy evidence for rapid temperature increases in Siberia over the past century, the changes in Lake Baikal are particularly significant, because this lake is potentially among those most resistant to climate change due to its tremendous volume and thermal inertia. Relatively obscure until now, these Lake Baikal data come to international attention at a time when local anthropogenic stressors pose additional threats to the worlds preeminent lake.
University of Washington
The Old Fisheries Center Auditorium (rm 201)
Date and Time:
January 11, 2007,
11:00 am - 12:30 pm