Restoration Objective:
Testing quicklime application and efficacy and then removing sea urchins at a large scale to restore kelp forest.
Site Selection Criteria:
Urchin barrens with low biodiversity were targeted in areas that were once kelp.
Norwegian Institute of Water Resources (NIVA) - Hammerfest
Norwegian Institute of Water Resources (NIVA) - Hammerfest
Restoration Project
Norwegian Institute of Water Resources (NIVA) - Hammerfest
Site Observations:
Observation Date
1st Jan 2011 – 1st Jan 2013
Action Summary:
In 2011, a pilot project involving local authorities, research institutions, and industry tested whether the use of quicklime (CaO), which dissolves urchin tests on contact, had any unintended environmental impacts in Porsanger Fjord. After 1 year, cover of macroalgae and kelp increased, and the method was then scaled up in Porsanger in year 2 (∼30 ha) and replicated in nearby Hammerfest over an area of ∼80 ha in 2017.
Lessons Learned:
Quicklime can be effective approach for restoring kelp forests with minimal collateral damage when applied correctly.
Project Outcomes:
These efforts resulted in the return of the kelps Saccharina latissima and Alaria esculenta and increases in faunal biodiversity.
Area of Restoration (Ha)
80
Indicator Data:
Indicator: | Ending Value: | Starting Value: |
|---|---|---|
Success | ||
| Costings: | |
|---|---|
| Cost Year: | 2017 |
| Cost Currency: | NOK |
| Total Cost: | 80,000 |
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