Studying Coral Reefs in the Darwin and Wolf Expedition 2017

Inti Keith
09 Jun 17 /
Scientific team in the north of the Galapagos. Photo by: Charles Darwin Foundation

The Galapagos Archipelago has a new designation, a “Marine Sanctuary”, conformed by Darwin and Wolf; small islands located in the north. These islands have a lot to discover and protect. A group of experimented scientists embarked in an expedition on the boat Queen Mabel at the end of April, 2017.

The Charles Darwin Foundation Scientists (CDF), Ecuador International Conservation (IC-Ecuador), ETPS Regional Program (Eastern Pacific Landscape), Nazca Institute of Marine Research and Nova Southeastern University joined to study; i) the amount of seaweed Caulerpa sp. in Darwin´s reef; ii) map the coral area; iii) get ecological monitory data to know the actual conditions of the coral areas in Darwin and Wolf. Everything was based on the “Research about marine invasive species to prevent, stop, and manage it in the Galapagos Marine Reserve.

In the marine bottom, transects of 50 meters were placed at 15 and 6 meters of depth. These activities were realized:

    • Biodiversity censuses, by counting present organisms (fish, macroinvertebrades, and sessile organism).
    • Coverage estimation through quadrants, it was estimated the Caulerpa sp. seaweed coverage along the transects.
    • Information record, temperature, currents, swell and visibility in each dive.
    • Change of temperature devices that were in registered strategic places in the GPS.
    • Mapping the old reef on Darwin Island.
Quadrant to estimate the abundance of algae in coral reefs.
Quadrant to estimate the abundance of algae in coral reefs. Photo by: Charles Darwin Foundation.

As a result of this expedition, it was able to determinate that Darwin and Wolf reef communities are in good conditions. Some samples and small colonies were observed. It indicates an active population and it keeps a growing population. Otherwise, important reef areas are being affected because of the overgrowth of the Caulerpa sp. seaweed. It´s territory has increased in recent years (at least, from 2015).

Seaweed in the north of the archipelago.
Seaweed in the north of the archipelago. Photo by: Charles Darwin Foundation.

The Surface temperature of the water in Darwin and Wolf has not changed abruptly, and it was found less than 1% of the white reefs. In a previous trip, on November, it was determined that temperature was between 16-19 C. While during the trip temperatures between 26-29 C were registered.  

It was new to find small patches of Caulerpa sp. seaweed in the places were the reef colonies are located at Wolf Island. It was reported by the Galapagos National Park. It shows the importance of monitoring frequency these patches to prevent and take actions to avoid this seaweed expansion as it did in Darwin Island.

Inti Keith

Principal Investigator - Marine Biodiversity Research

View bio
Andres Cruz

Protect Galapagos, Impact the World

The impact you make on this small ecosystem of enormous biodiversity is part of a larger footprint you are leaving for the world's future. Join us on our mission to safeguard one of our planet’s most important natural treasures through science and conservation action by making a donation today. Thank you for making an impact with us.