Kelp forest ecosystems throughout temperate and polar regions worldwide support rich biodiversity and fuel productive coastal food webs. These important ecosystems are increasingly at threat from human activities that act on local (e.g. pollution and fishing) and global (e.g. climate change) scales. As a result of synergies between various stressors, kelps are disappearing in many areas of the world. My research works to understand how human disturbances impact the diversity, productivity, and resilience of kelp forests, as well as the services (e.g. carbon flux and storage, commercial fisheries) that kelp ecosystems provide to humans.