Chase and Leibold define the niche as including both what an organism needs from its environment and how that organism’s activities shape its environment. Drawing on the theory of consumer-resource interactions, as well as its graphical analysis, they develop a framework for understanding niches that is flexible enough to include a variety of small- and large-scale processes, from resource competition, predation and stress to community structure, biodiversity and ecosystem function. Chase and Leibold’s synthetic approach should interest ecologists from a wide range of subdisciplines.