Britannica
Sources used in this answer
Why did some giant kelp forests need spores from distant kelp beds to recover?
Created from Britannica articles
using AI.
AI can make mistakes, so verify using Britannica articles.
ecological disturbance
Aerial view of the remains of trees on a hillside after a forest fire.
Some giant kelp (Macrocystis pyrifera) forests required spores from distant beds to recover because the intensity of certain El Niño events was so severe that it devastated the local kelp community, leaving few or no biological remnants behind to facilitate local regeneration.1
In contrast, kelp beds that experienced less intense disturbances retained an intact community and were able to recover quickly without the need for external recolonization. When a disturbance is severe enough to effectively eliminate the local population, the ecosystem must rely on propagules—in this case, spores transported from other beds located hundreds of miles away—to initiate the recovery process.1