HAVELOCK, N.C. – At a summit this week on coastal resilience, some scientists point to underwater seagrasses as an important tool for protecting shorelines from hurricanes and other extreme weather events.
Underwater seagrasses may be difficult to spot, but the North Carolina coast is home to hundreds of thousands of acres of lush water-dwelling vegetation. Retired National Oceanic and Atmospheric Administration marine scientist Jud Kenworthy says seagrass meadows have strong roots that hold sediment in place and help coastal systems withstand high winds and forceful waves.
"As an alternative, a natural alternative to shoreline protection, seagrasses are sort of the first line of defense before we get to the shore," says Kenworthy.
Last year, Gov. Roy Cooper issued an executive order calling for the state to take steps to prepare for increased flooding, extreme weather and rising sea levels in the face of a changing climate. Kenworthy says conserving seagrasses could be one of the most effective ways to keep North Carolina's shorelines intact.
Tancred Miller, manager of Coastal and Ocean Policy for the North Carolina's Department of Environmental Quality, says the state has been working on innovative ways to help coastal communities adapt to natural hazards and long-term shifts in shoreline ecosystems.
"We also with climate change have habitat transition,” says Miller. “So, things are going from forest to wetland, from wetland to open water. We have habitat changes, so we need to think about all these things – not just at the individual property level, but also at the community level, the county level and ultimately, the entire coast."
Next year, the state will update its Coastal Habitat Protection Plan, which includes seagrasses as one key habitat to conserve.
People living in coastal areas may not realize that seagrasses anchor a healthy ecosystem. Bill Crowell, the director of the state's Albemarle-Pamlico National Estuary Partnership, describes it as an indicator of healthy water and thriving marine life.
"So the thing that you can do to help keep it there is one, don't disturb it, don't run your boat props through it,” says Crowell. “But the number one thing I think people can do is make sure that the water quality off the land is good – reducing storm water, reducing pollutants coming into the water."
Seagrass meadows are found in nearly every coastal state, but have been disappearing for decades. Studies have found that farm run-off, sewage and other pollutants are harming them.
Crowell points out it can take months or years for seagrasses to recover from damage – and once they are gone, it's difficult to grow them back.
Support for this reporting was provided by The Pew Charitable Trusts.
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California has set a goal to protect 30% of its land and waters by the year 2030, so the Ocean Protection Council is working on which waters should count as protected and is identifying new conservation measures.
A public comment period on its draft framework just ended.
Drew Talley, professor of environmental and ocean sciences at the University of San Diego, said the proposal is on the right track but needs a little more work when it comes to estuaries, where the rivers meet the sea.
"It doesn't look at some of the main threats those systems are facing," Talley explained. "Including sea level rise, degraded water quality and ongoing effects of historical alterations like dams and diking and urban runoff."
The Ocean Protection Council is expected to release its final proposal Dec. 9. Estuaries are crucial habitat for many species. They also buffer communities from floods during a storm, reduce ocean acidification and help fight climate change, since marine plants store a great deal of carbon.
Kerstin Wasson, research coordinator for the Elkhorn Slough National Estuarine Research Reserve near Monterey, said the contours of protected areas need to be widened, to account for the effects of climate change.
"With accelerated sea level rise, they're going to need a lot of space to migrate upwards," Wasson urged. "If we were to draw a circle around an estuary to say what's protected, it needs to be 10 feet above where the marsh is today."
More than 90% of California's historic wetlands have been lost to development.
Support for this reporting was provided by The Pew Charitable Trusts.
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Anglers along the Atlantic coast want stricter regulations to help improve stocks of Atlantic herring, a forage fish vital to a healthy ocean ecosystem.
The population was once depleted from decades of overfishing and has struggled to recover, affecting the health of larger, prized fish up the food chain.
Rich Hittinger, first vice president of the Rhode Island Saltwater Anglers Association, said it hurts local fishermen and the small coastal businesses that support them.
"We see the striped bass and the other fish not showing up in an area," Hittinger observed. "Because the forage fish aren't there."
Anglers have asked the New England Fishery Management Council to reestablish a 12-mile offshore buffer zone for large herring trawlers. Nearly all respondents to a recent public comment period backed further actions to protect the Atlantic herring and other forage fish.
A recent assessment of Atlantic herring stock showed little progress has been made in rebuilding the population. Despite increased management, federal regulators say the likelihood of meeting stock targets for next year is less than 1%.
Jaclyn Higgins, forage fish program manager for the Theodore Roosevelt Conservation Partnership, said she is concerned the science driving harvest restrictions of forage fish has not caught up with what is happening in the ocean.
"We really want to make sure that we use all of the information that we have to move this ecosystem-based management framework forward," Higgins urged. "Improve the models, improve what we have, and not stay stagnant with the status quo."
Higgins noted the Atlantic herring stock currently sits at just 26% of its biomass target. She is hopeful more data collection and research funding will lead to regionally specific and precautionary measures to better protect fisheries and the communities they serve.
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Marine biologists conducting deep dives near five California islands are collecting data they hope will strengthen the case for ending gillnet fishing within a three-mile radius. The Channel Islands often are called the "Galapagos of North America" - due to their diverse ecosystem.
Caitlynn Birch, a marine scientist with the group Oceana, is part of a dive team collecting environmental DNA water samples and said they're analyzed in a lab to detect virtually all the animals and plants there, through the "footprint" they leave behind in the water column.
"This is important because the Channel Islands is an extremely biodiverse region, due to the topography of the sea floor, due to the oceanographic currents - and so, it creates a really unique habitat for many animals," she explained.
Fisherman use invisible gillnets along the seafloor to catch profitable halibut and white sea bass. But whales, sea lions and sharks can also be trapped. The method is banned off the coasts of Central and Northern California, but still used in federal waters, offshore banks, and around the Channel Islands. A bill before California lawmakers would end those exemptions.
About 30 fishermen still have active set gillnet permits in Southern California, but the state has stopped issuing new permits. Those who fish the waters say it would threaten their livelihoods, while Birch believes it would help protect critical habitat for vulnerable and recovering animals.
"Each island is so diverse and different from one another - different rocky substates, and different animal and plant life on the physical islands. And then, it's interesting to see how that's correlated below and what sorts of different species and assemblages that we're seeing at each of the islands," Birch continued.
This month, divers have collected samples on Santa Barbara, Anacapa, Santa Cruz and Santa Rosa islands. The waters there provide feeding areas and migratory routes for large whales - including endangered humpback whales - nurseries for great white shark pups, breeding and foraging habitat for California sea lions and giant seabass, cold-water corals, and giant kelp forests.
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