Kelp Indicator
What are kelp?
Kelp are marine algae that support vibrant ecosystems. There are two kelp species along the West Coast that form a canopy atthe surface. The Kelp Indicator assesses these two canopy-forming species.
Why are kelp important?
Kelp create underwater forests that are important for fish and invertebrates. Kelp are also significant for West Coastal Tribal nations.
2023 STATUS
HISTORICAL TRENDS
Key Findings
Kelp status along the U.S. West Coast is Below Expectation, 72% of kelp beds have canopies below their historic norms. This is the third lowest year on record since 1984.
Kelp canopy is declining coast-wide. Over the past 40 years, kelp canopies decreased at a rate of 10% per decade. However, there has been no coast-wide decline or recovery in the last five years.
Kelp is most impacted in northern California and central California. Marine heatwaves and Sea Star Wasting Syndrome contributed to declines.