Georgy Gause was a prominent Russian biologist known for his work in ecology and microbiology. He is best recognized for formulating the competitive exclusion principle, which states that two species competing for the same resources cannot coexist indefinitely. This principle has significant implications in understanding biodiversity and species interactions in ecosystems. Gause conducted extensive research on protozoa and bacterial populations, contributing to the field of population dynamics. His experiments demonstrated how species compete for limited resources, influencing later ecological theories. Gause's work laid the foundation for modern ecology and has been influential in studies of evolution and environmental science.