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Improving on Nature?
In 1958, black bass were introduced into Lake Atitlan in the highlands of western Guatemala as a way to attract tourism and boost the local economy, but unforeseen complications resulted in an ecological disaster. Developed for an introductory course i...

The Dangers of Deicing
Loss of species richness is often due to anthropogenic activity. The global decline of amphibians is one such example. This case study examines the impact of road deicing agents on amphibians living near bridges and roads treated heavily with salt duri...

The Horseshoe Crab
This case study examines the population dynamics of the horseshoe crab, which is sometimes described as a “living fossil.” Students are shown PowerPoint slides that are interspersed with clicker questions about the biology, life history str...