Do aggregated harvests with structural retention conserve the cavity web of old upland forest in the boreal plains?

▶ Four woodpeckers of old boreal forest are key excavators in cavity web. ▶ Key cavity excavators of intact old forest are retained in aggregated harvests. ▶ Relative importance of key excavators differs in intact and harvest cavity webs. ▶ Harvest cavity web includes interactions between open-woodland species.