Story highlights Lance Morgan: We must provide safe havens for marine life to repopulate and rebuild

Morgan: The worst effects of climate change can be lessened with marine reserves that prohibit all extraction of ocean life

Lance Morgan is president of Marine Conservation Institute and a marine biologist who became enchanted with the kelp forests of California after obtaining his scuba certification as a teenager. He is chairman of the board for the Deep Sea Conservation Coalition and holds a research faculty appointment at Bodega Marine Laboratory at the University of California at Davis. The opinions expressed in this commentary are his.

(CNN) Almost daily we hear that the oceans are in trouble -- overfishing, melting glaciers, rising seas, acidifying waters, expanding dead zones, escalating marine debris and starving seals to name a few. Seabirds around the world have declined by 70% since the 1950s, while current extinction rates are 1,000 times normal background rates.

Lance Morgan

What is lost in these narrowly focused headlines is the fundamental truth that oceans are the biggest single life support system on the planet, and as such they need to be an enormous part of the global solution to damage from excessive carbon dioxide emissions. After all, oceans cover over 70% of the Earth's surface, the marine life (plankton) in them produces one out of every two breaths we take, and oceans provide 99% of the livable space on Earth.

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In addition, oceans moderate our climate and atmosphere, helping make this planet habitable for us and our loved ones. They soak up excess heat as well as carbon dioxide from the burning of fossil fuels. And if they didn't, climate change would be much worse already. The bottom line is, if we want to maintain the planet for our children, our families and future generations, we need a healthy, functioning ocean that resists the negative impacts from climate change.

The best way to do that is by providing marine life safe havens in which they can repopulate the sea after other places get too hot or too acidic for resident marine life. We can't store marine life away in underground vaults like we do with seeds to protect food crops against calamity, but we can establish ocean refuges for marine life where they can thrive, free from exploitation and with their habitats intact.

A great deal of recent research shows that strongly protecting areas -- no-take marine reserves that prohibit all extraction of marine life -- is the most effective way to counteract the worst effects of climate change.

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