Phenology is like nature’s calendar, helping dictate when birds build their nests, insects emerge, and flowers bloom. Our faculty focus research on how phenology, the study of biological life cycles, affects nearly all aspects of the environment, including the abundance, distribution, and diversity of organisms, ecosystem services, food webs, and global cycles of water and carbon. We explore how variations in climate and other natural changes may trigger biological responses that alter ecosystem processes and services. Our research benefits everyone, from gardeners who need to know when to plant to avoid frosts to farmers who rely on our information so they can decide when to apply fertilizers and pesticides.