Foundation species recovery yields inconsistent recovery of associated
community: a long-term experiment
Abstract
Foundation species recovery is often assumed to restore associated
communities to their pre-disturbance state. However, community dynamics
may differ due to species-specific responses, altered environmental
conditions, or changes in biotic interactions that can override the
influence of the recovering foundation species. In a 14-year experiment,
we studied the loss and recovery of giant kelp and its associated rocky
reef community. Alongside reference plots, we removed giant kelp for
6–7 years, then tracked recovery for another 6–7 years. After
cessation of removal, giant kelp and community (understory macroalgae
and sessile invertebrates) biomass rapidly converged on the reference
condition. However, the composition of the community diverged from the
starting point, indicating that recovery of community biomass can
disguise species turnover in response to foundation species recovery.
Our results highlight how stochastic forces can overwhelm the influence
of foundation species to determine the structure of communities when
recovering from disturbance.