Enric Sala talks about his work at this week’s National Geographic Explorers Festival (#NatGeoFest) in Washington, D.C. Visit this page for details of livestream events.
What is the purpose and most significant finding of this new analysis?
We show that no-take marine reserves where fishing is prohibited have, on average, almost seven times more fish biomass (the total weight of fish per square mile) than unprotected areas nearby. But we also found that “marine protected areas” (MPAs) that allow fishing within their boundaries are not able to even double fish biomass. While these partially protected areas are useful for managing use conflicts, it is no-take reserves that are the most efficient in bringing back marine life and protecting ecosystems.
What are marine reserves designed to do, and how do they provide more than what they were initially designed for, as stated in the paper?
Marine reserves were initially designed to protect marine life within their boundaries, but over time we’ve discovered that they produce so many fish and other animals, that some of them spill over the reserve’s boundaries. That helps the local fishermen who now can catch more outside the reserve boundaries. And when the fish come back, the divers come in, bringing in more revenue and helping to create more jobs than fishing.
How successful are the reserves?
Reserves can be very successful, as shown in our research. As an example, there is a little marine reserve on the Costa Brava in the Mediterranean, the Medes Islands, that is only 1 square kilometer in size. But it contains one of the largest abundances of large fish in the Mediterranean, which attracts thousands of divers from all over Europe. That square kilometer brings in 12 million Euros per year through ecotourism.
Should artisanal or traditional fishing be allowed in marine reserves?
Marine reserves should be closed to fishing, so that they can bring marine life back and preserve it. Traditional fishing should be carried out in a sustainable way, but outside the reserves. Research shows that artisanal fishing does better next to reserves anyway.
What are the most significant challenges in proclaiming marine reserves and enforcing their protection?
Biggest challenge is opposition from the fishing industry, mainly because either they are not aware of the benefits of reserves to fishing, or because they opt for short-term economic gain at the expense of the resource they exploit. But I’ve met fishermen who were against reserves initially, but who now want more reserves, because they’re better off because of them.
How much of the ocean do you believe should still be set aside for marine reserves? Are there any specific areas that should be given high priority?
A study indicated that, on average, about 40 percentof the ocean should be protected to achieve ecological protection but also sustainability of fisheries. I think that we should protect half of the ocean, which according to another study would allow to catch the same amount of fish in the other half, fishing less.
It also should be made clear that protected should mean truly protected. No-take reserves are protected areas. MPAs that allow fishing, in my opinion, should not be called protected areas, but “managed areas”. And these managed areas should not count in the global tally of how much of the ocean is protected. Calling an area that allows fishing a “marine protected area” is like calling a timber concession (no matter how well managed) a “protected forest.”
How much of the ocean is protected now?
Only 3.5 percent of the ocean is under some type of protection, and less than 2 percent is in no-take marine reserves. Despite the recent increase in large MPAs worldwide, we are still short of the United Nations target of 10 percent of the ocean. So we have a lot of work to do.
What ultimately can the public do to help conserve the oceans?
Avoid single-use plastic such as straws and plastic bags, and eat less meat and more vegetables. And of course, if you eat fish, eat only fish that have a label of sustainability.
What is your current/next research project?
We continue to survey the most pristine places in the ocean and work to inspire leaders to protect them in large marine reserves. For updates on the project please see pristineseas.org
Want to become a National Geographic Explorer? Learn how you can apply for a grant from the National Geographic Society.