SS4.05 Tribute to Thomas Frost
Date: Monday, June 10, 2002
Time: 11:45:00 AM
Location: Sidney
 
WebsterKE, University of Maine, Orono, Maine, USA, katherine.webster@maine.edu
 
MACROINVERTEBRATE RESPONSES TO ACIDIFICATION AND RECOVERY IN THE LITTLE ROCK LAKE EXPERIMENT: HIGHLIGHTING THE MYRIAD CONTRIBUTIONS OF TOM FROST
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Tom Frost had a major influence on many aspects of the Little Rock Lake (LRL) ecosystem experiment including design and implementation; development of innovative ways to analyze data from an experiment with n=1; and important contributions to theoretical aspects of ecosystem science. Using data on benthic macroinvertebrates during the acidification and recovery phase of the experiment, I highlight Tom's contributions, including the distinction of direct and indirect effects to acidification; lags in acidification and recovery responses; and hysteresis in the recovery of communities. Responses of the benthic community to acidification ranged from direct responses to increased acidity to indirect increases related to decreased fish predation and increased development of algal mats. Unlike the zooplankton community so well studied by Tom, the recovery of macroinvertebrates was relatively symmetrical, with few lags in response. The initial benthic community appeared to be more acid tolerant than did the zooplankton community, perhaps a result of annual pH spring depressions typical of LRL. Tom's legacy to aquatic ecology continues in both his important scientific contributions and his lasting effects on colleagues and students.