North Carolina Sea Grant
Coastwatch Currents

Coastwatch Currents

October 30, 2017 | Danielle Costantini

ABOVE: Ghost forests, the name researchers have given these eerie looking dead forests, are visible along the Albemarle Sound in eastern North Carolina. Photo by Lindsey Smart

By Lindsey Smart

Lindsey Smart is a doctoral candidate in the Center for Geospatial Analytics within the College of Natural Resources at North Carolina State University. She received a North Carolina Sea Grant/Space Grant fellowship. She previously worked for the Albemarle-Pamlico National Estuary Partnership.

You’ve heard of haunted houses for Halloween — but what about ghost forests?

Far from being frighteningly fun, ghost forests are a growing problem along much of the East Coast.

Ghost forests, as scientists refer to them, provide a stark visual indicator of sea-level rise. Bare, pale trunks line areas where once healthy coastal forests thrived. These coastal forests just can’t keep pace with the encroaching saltwater that is creeping farther inland into the soil and surface waters of the coastal plain.

This combination of saltwater intrusion and forest retreat is transforming freshwater landscapes long before rising seas permanently inundate the land. Saltwater intrusion has been occurring since the end of the last ice age when the oceans began rising due to melting ice sheets many thousands of years ago. But it is the rate at which this phenomenon is taking place that has many scientists taking note.

Sea-level rise vulnerability of the Albemarle-Pamlico Peninsula in eastern North Carolina, based on elevation data. Animation courtesy of Lindsey Smart.

Sea-level rise is one more stressor on forests worldwide — forests that are already threatened by land clearing, fires, disease and invasive species. Overall, these combined changes are diminishing the ability of plants to fight climate change.

Plants are well known for their role in absorbing carbon dioxide. In the science arena, that is known as carbon storage or carbon sequestration. This important “ecosystem service” means that plants are providing clean air for humans and wildlife.

Sea level rise threatens the very ability of forests to provide all of these important benefits to both wildlife and humans. The reduction in carbon sequestration due to sea-level rise can exacerbate climate change and its negative impacts. Forest retreat also fragments — and in some cases even eliminates — important habitat for some wildlife species. It limits the ability of coastal forests to serve as buffers from storms and storm surge. With the loss of these forests, interior areas can be exposed during large storm events that were previously protected.

Aboveground storage potential in 2001, 2014 and the overall change for the study time period. Note the forest loss along the area perimeter — likely resulting from saltwater intrusion. Courtesy of Lindsey Smart.

Ghost forests can be seen along the Albemarle-Pamlico peninsula in rural eastern North Carolina. An interdisciplinary team from NC State University’s College of Natural Resources, of which I am a member, is tackling a number of issues related to saltwater intrusion and its impacts. We refer to ourselves as the SALT team, for Salinization: Adaptive Capacity Building for Land-use and Tourism Development.

Our applied research seeks solutions to critical land and water issues. One of the main goals is to outline potential solutions that local communities may adopt to cope with problems associated with saltwater intrusion. As part of this project, my research is looking to better understand mutually beneficial ways that humans and wildlife can adapt to these changing coastal landscapes.

Learn more about my research funded by a North Carolina Sea Grant/ Space Grant Fellowship in the upcoming Holiday 2017 issue of Coastwatch magazine.

 

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