THE ECOLOGICAL QUESTION
Is there evidence for global warming in long term data on changes in dates of ice cover in three Wisconsin Lakes?
Effects of climate change on ecological systems.
WHAT STUDENTS DO
Students plot more than 100 years of data on dates of "ice on" and "ice off" and duration of ice cover for three Wisconsin Lakes. They examine patterns of variation at different time scales to see the importance of long-term data.
Interpreting data, making inferences from trends or patterns in data, making spatial and temporal comparisons of ecological systems.
Interpretation of data, analyzing trends and patterns in spatial and temporal data, and constructing explanations about the links between abiotic and biotic factors on ecological systems from large-scale data.
North Temperate Lakes LTER archive (http://lterquery.limnology.wisc.edu/abstract_new.jsp?id=PHYS)
Robert E. Bohanan1, Marianne Krasny2, and Adam Welman3
1 - Center for Biology Education, University of Wisconsin – Madison, Madison, WI 53706, firstname.lastname@example.org
2 - Department of Natural Resources, Cornell University, Ithaca, NY, 14853, email@example.com
3 - Center for the Environment, Cornell University, Ithaca, NY, 14853
Credits for this Data Set: John Magnuson, Barbara Benson, and David Balsiger of the North Temperate Lakes Long-term Ecological Research (LTER) generously provided access to data, comments, and suggestions. Credits for this Volume of Data Sets: Robert Waide and staff at the U.S. LTER Network Office provided access, comments, and suggestions related to LTER databases. TIEE: Bruce Grant and Charlene D’Avanzo provided very helpful comments on the development of the activities, teaching approaches, and ideas and resources for assessment.
Bohanan, Robert E., Marianne Krasny, and Adam Welman. April 2005, posting date.
Ice breakup on Lake Mendota (Southern Wisconsin) in the spring of 2000.
Photo by John J. Magnuson.