Community assembly is a field of research in ecology that focuses on the processes by which species come together and interact to form a biological community. Researchers in this area study the factors that influence the composition and structure of communities, including species interactions, environmental conditions, and historical events. Community assembly research can help scientists understand how different species coexist, compete, and evolve together in a given ecosystem. Additionally, this field can provide insights into the impacts of human activities and environmental changes on community dynamics.