Microorganisms play essential roles in ecosystem functioning, nutrient cycling, and environmental sustainability. Studying their interactions provides insight into ecological balance and the health of natural systems. Environmental Microbiology and Ecology explores microbial diversity, metabolism, and ecological relationships across terrestrial and aquatic environments. The book discusses biodegradation, bioremediation, and microbial contributions to global biogeochemical cycles. It also examines the influence of environmental factors on microbial communities. By integrating molecular biology with ecological theory, it provides students and professionals with a comprehensive understanding of microbial processes vital to environmental stability and ecosystem health.