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    May 01, 2026  
American University Catalog 2025-2026 
    
American University Catalog 2025-2026

BIO-423 Ecology (3)


This course provides an understanding of the fundamental principles of the ecological sciences. Emphasis is placed on the interaction of organisms and their environment at the levels of individuals, populations, communities and ecosystems, and the effects of such interactions on energy flow and nutrient cycling within the biosphere. Specific topics include density-independent and density-dependent growth, the meaning of carrying capacity, competition, predation, mutualism, biodiversity and its measurements, community dynamics and stability, and ecosystem services. Crosslist: BIO-623 . Usually Offered: alternate springs (odd years). Prerequisite: BIO-210 . Recommendation: calculus or statistics course.