Coastal Ecosystems

The narrow region where land and ocean meet is among the most dynamic and complex collection of physical and biological systems on Earth. These can include salt marshes, mangroves, wetlands, estuaries, reefs, and bays often linked in an intricate network of physical, chemical, and biological interchanges above and below the water. They are often highly productive, highly valued, and highly accessible, making them a natural intersection between the human and natural worlds.

In addition to their role in the wider marine and terrestrial systems they link to, oastal ecosystems provide a broad range of benefits to humans. They can act as storm barriers and water filters, they are nurseries and habitat for commercially important plants and animals, and they are among the most popular tourist destinations.

Coastal systems are also very sensitive to environmental conditions. Small changes in such things as temperature, salinity, nutrient availability, or sediment load, whether natural or human-induced, can have wide-ranging impacts.

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From Oceanus Magazine

Marshes, Mosquitoes, and Sea Level Rise

In the 1930s, the Cape Cod Mosquito Control Project dug approximately 1,500 miles of ditches across marshes on the Cape to drain their water and reduce the number of ponds where mosquitoes can breed. Woods Hole Oceanographic Institution biogeochemist Amanda Spivak is studying how this and other management decisions have changed the ability of coastal marshes to store carbon and protect against sea level rise.

The Unseen World on Coral Reefs

We have learned that microbial communities on and within us—a microbiome—keep people healthy. Corals reefs also have their own microbiomes that they couldn’t function without.

The Recipe for a Harmful Algal Bloom

Harmful algal blooms can produce toxins that accumulate in shellfish and cause health problems and economic losses. They have increased in strength and frequency worldwide. Can we get advance warnings of when and where they will occur?

Life at the Edge

What makes the shelf break front such a productive and diverse part of the Northwest Atlantic Ocean? A group of scientists on the research vessel Neil Armstrong spent two weeks at sea in 2018 as part of a three-year, NSF-funded project to find out.

The Bacteria on Your Beaches

The widespread use of antibiotics is increasing the spread of antibiotic-resistant bacteria—perhaps into the ocean, too.


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News Releases


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WHOI in the News