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.