Laboratory studies of ecosystems to supplement lecture material presented in BIO-326 and illustrate some techniques involved in current ecological studies.  Laboratory exercises will combine studies of plant, animal, and environmental interactions with experimental manipulations of selected ecosystems.  Three laboratory or field trip hours per week. Prerequisites:  BIO-110, BIO-151, CHE-111, CHE-141, (MAT-181 or MAT-191). Corequisite BIO-326.