CHANNEL ISLANDS >> Strands of kelp glow in the dim morning light off California’s Channel Islands as fish and sea lions weave through the golden fronds. It’s a scene of remarkable abundance — the result of more than two decades of protection in one of the state’s oldest marine reserves.

But farther out in the Pacific, life in the vast Pacific Remote Islands Marine National Monument faces a very different future. The Trump administration has moved to reopen 500,000 square miles (about 1.3 million square kilometers) of previously protected waters there to commercial fishing, in a dramatic rollback of federal ocean protections.

California, meanwhile, may be headed in the opposite direction. As it undertakes its first 10-year review of its marine protected area network, state officials, scientists, tribal leaders and environmental advocates are pushing not just to maintain protections but to expand them.

“These areas are like our underwater Yellowstone,” said Douglas McCauley, director of the Benioff Ocean Science Laboratory at the University of California, Santa Barbara, speaking aboard a dive boat heading to the Channel Islands. “It’s important to protect that biological heritage, but it also creates an extremely lucrative tourism industry. People want to go see all that nature and wildlife in action.”

The state’s marine protected areas have become magnets for scuba divers and snorkelers drawn by their rich life. Over time, these reserves allow fish populations to rebound and spill over into nearby waters — a long-term investment with large returns for fishermen, as McCauley sees it.

Launched in 2003, the network now spans 124 distinct sections along the coast. Some areas are “no-take” zones where all fishing is prohibited, while others allow limited use. The network covers roughly 16% of state waters, with proposed expansions that would add 2%. The goal, under the 1999 Marine Life Protection Act, was to create a science-based system to rebuild ecosystems after decades of overfishing and habitat loss.

The Channel Islands were among the first sites established. About 20% of the waters surrounding the eight-island chain are now fully protected.

But expansion proposals have sparked debate among fishermen.

Some anglers want restrictions relaxed

Blake Hermann, a fourth-generation commercial fisherman from Ventura County, grew up fishing around the Channel Islands, where he harpoons swordfish by hand. He supports keeping much of the marine protected network intact, but he argues that some closures go too far and has petitioned the state to allow limited fishing in three no-take zones around the islands.

Protected areas can help nearshore species like sea bass and lobster recover, Herman said, but offer little benefit to wide-ranging ocean-goers like swordfish and tuna that may pass only briefly through a protected zone during migration.

He questions whether it makes sense to restrict selective, low-impact fishing methods in places where these migratory species are only temporary visitors and will likely be caught when they move into unrestricted waters.

“These islands are the best thing on the planet,” Hermann said. “We can still protect what makes sense to protect in the right areas, but you can also still give some access back too.”

‘We’re really protecting ourselves’

Others warn that reopening any part of the protected network could set a troubling precedent, especially as climate change disrupts ocean ecosystems.

“When we protect the oceans, we’re really protecting ourselves,” said Sandy Aylesworth, director of the Pacific Initiative for the Natural Resources Defense Council. “If the additional 2% is added, it will better prepare California’s ocean for future stressors like climate change and new industrial uses of the ocean. So I see it as being a real benefit to all of the ocean users in California — including recreational and commercial fishermen.”

Final decisions from the review are expected early next year.

“Marine protected areas are probably the most controversial thing that we work on, because you’re essentially telling a group of individuals that they can’t do what they’ve historically done in an area,” said Craig Shuman, marine region manager at the California Department of Fish and Wildlife.

Shuman said the fishing community has become particularly vocal in response to petitions to expand the MPA network. Many aren’t asking for more access, he said, just for existing opportunities not to be taken away.

Overall, he said, the data shows the network is working. “It’s not consistent — each MPA is a little bit different — but more often than not, we’re seeing the MPAs are working to achieve the goals of the Act.”