Restoration Project

Universidad Católica del Norte - La Herradura Bay

Restoration Objective:

This study aimed to repopulate areas of the intertidal with Lessonia in order to increase production for commercial harvests and to improve restoration techniques.

Site Selection Criteria:

La Herradura Bay is a protected site with low L. nigrescens abundance, dominated by coralline algae with high abundances of urchins.

Cause Of Decline:

Chilean brown seaweeds (particularly species of Lessonia and Macrocystis) are regularly harvested and exported. In addition to harvesting pressure, production of subtidal and intertidal populations of Lessonia were adversely affected by the El Niño of 1982-83.

Key Reasons For Decline:


Scientific Paper

Repopulation of intertidal areas with Lessonia nigrescens in northern Chile

J.A. Vásquez, F. Tala, , Journal of Applied Phycology, Vol. 7.


Universidad Católica del Norte

Site Observations:

Observation Date

1st Mar 1993 – 1st Mar 1994

Action Summary:

100 reproductive Lessonia nigrescens fronds were dried and transported to Punta Lagunillas and rehydrated in 40L of seawater for 2 hours. The resulting spore suspension (8 x 106 spores) was introduced into the water at low tide over three 10m2 sites lacking L. nigrescens and sea urchins. Three control sites of a comparable area without spore seeding were established 15m from the experimental area.

Lessons Learned:

No development of plants.

Project Outcomes:

There was no development of plants in the seeded areas at La Herradura Bay.

Key Reasons For Decline:


Indicator Data:


Ending Value:

Starting Value:

Adult Kelp Count

Cost Currency:USD