The mammalian gut hosts hundreds of bacterial species that play an essential role in keeping us healthy. These microorganisms help digest food, produce vital nutrients, train our immune system, and protect us from harmful pathogens. To perform these functions effectively, gut bacteria must constantly adapt to changes in their environment, such as shifts in diet, exposure to medications, or infections. When this delicate balance is disrupted, it can lead to dysbiosis, a microbial imbalance associated with various health problems, including inflammation, metabolic disorders, and gastrointestinal diseases. This project focuses on understanding how gut bacteria communicate with one another to maintain stability and resilience within this complex ecosystem. Bacteria use chemical signals in a process known as quorum sensing to coordinate their activities and respond collectively to environmental changes. Although quorum sensing has been well studied in simple bacterial systems, its role in the highly diverse and interactive community of the mammalian gut remains poorly understood. By investigating how bacterial communication shapes microbial cooperation, adaptation, and resistance to disturbance, we aim to uncover the principles that support a healthy gut ecosystem. Ultimately, our findings could inform new approaches to strengthen beneficial microbes, prevent dysbiosis, and promote long-term gut and overall health.