Net outcomes: changes in cover
Fifteen years of experimental manipulations resulted in distinct changes in community structure based on the patterns of relative cover change in species groups. Most often, global change treatments led to an increase of the already dominant species within the community (i.e. ‘Dominant increase’), while in one scenario global change lead to the reshuffling of species hierarchies (i.e. ‘Competitive reshuffling’). In contrast, in ambient conditions (CTL), net changes strongly overlapped across species groups and were highly variable between years, indicating little directional change over time. We describe each outcome below.