Declining pollution, recovering fish populations and protected lands are signs of improving health for the Potomac River, according to the Potomac Conservancy’s ninth annual State of the Nation’s River report.
In 2012, American Rivers listed the Potomac as the nation’s most endangered river. But the river’s latest grade of “B-”—up from a “C” in 2013 and a “D” in 2011—indicates slow but steady progress on the waterway’s path to recovery. Nutrient and sediment pollution has decreased, fish like shad and white perch are returning to the waterway and more than a quarter of the land in the Potomac region is protected from development.
“Not all is well with our Nation’s River, however,” the report states. The fastest growing source of pollution into both the Potomac River and Chesapeake Bay is stormwater runoff—rainfall that picks up pollutants as it flows across roads, parking lots, lawns and golf courses and carries them into rivers and streams, threatening marine life and human health. With millions expected to move to the Potomac region in the coming decades, an increase in polluted runoff threatens to offset much of the progress made so far.
According to the Conservancy, approaches like streamside forest buffers, green infrastructure, mixed-use communities and low-impact development could help support the river on its path toward recovery.
Less than 15 years ago, an exotic green beetle was discovered in southeastern Michigan. In the years that followed, the metallic insect that is no more than half an inch long spread into 24 more states—including five in the Chesapeake Bay watershed—and now threaten millions of native ash trees that fall sick and die when the insect’s larvae feed on the tissue underneath their bark.
The emerald ash borer likely arrived in the United States on wood packing material carried on airplanes or cargo ships from its native China. While the insects can fly at least half a mile from where they emerge as adults, it is the movement of larvae-laden wood that is thought to be the cause of many emerald ash borer infestations. As a result, the shipment of ash trees and logs is regulated, and transporting firewood outside of quarantined areas is illegal.
Such precautions are necessary because of the impact the emerald ash borer can have on forests. As larvae feed on the nutrient-rich inner bark of ash trees, they disrupt the trees’ ability to move food and water from its roots to its leaves. Once a tree is infested with emerald ash borer larvae, one-third to one-half of its branches may die within a year. Most of its canopy may be dead within two years, with the entire tree dead in three to four.
Ash trees can be found in almost all parts of the United States. All North American ash trees are susceptible to infestation, which means countless forests are susceptible to the loss of a species that supports the ecosystem’s protection of clean air, water and wildlife habitat. While native trees could fill the gaps left by dead ash, invasive plants could also spread in response to new light levels. Even the makeup of the surrounding soil may change, as ash trees are “dynamic accumulators” that gather calcium from the soil around them.
The economic impacts of the emerald ash borer are significant. First, there are costs to losing trees. The U.S. Forest Service estimates the eight billion ash trees on U.S. timberlands to be valued at $282.25 billion. Then, there are costs to mitigating the damage the insect has done. The Forest Service has predicted that an expanding infestation through 2019 will warrant the treatment, removal and replacement of more than 17 million ash trees, with an estimated price tag of $10.7 billion.
But the Forest Service has also explored an impressive number of emerald ash borer control and management methods. Experts have searched for effective predators, parasitoids and pathogens that could act as biological controls, evaluated the efficacy of insecticides injected into trunks of infested trees and explored the development of genetic hybrids that would integrate the resistance of Asian ash tree species into those native to North America. Experts have also conducted research into ridding trees of larvae by submerging infested logs under water, treating infested logs with chemicals and removing the bark of infested logs that could otherwise be sent to sawmills and manufacturing plants to be used for lumber, railroad ties and other value-added products.
In light of the extensive research that has been done in the years since the emerald ash borer was first found in the United States, the most important thing for individuals to remember is to follow regulatory guidelines for moving ash trees, logs and firewood and to report potential infestations to your local Cooperative Extension Service office. According to the Forest Service, making a large investment in understanding and controlling the spread of this invasive insect now could slow the expansion and postpone the ultimate costs of the emerald ash borer.
The official start of spring may have already passed, but one of the unofficial signs of the season arrived when the National Oceanic and Atmospheric Administration (NOAA) redeployed its final Chesapeake Bay Interpretive Buoy System (CBIBS) buoy today. All ten buoys—located along the Captain John Smith Chesapeake National Historic Trail—are now collecting and transmitting real-time data about conditions in the Chesapeake Bay.
CBIBS buoys offer valuable information to sailors, kayakers and others looking for information on wind speed, currents, wave heights and local conditions before heading out on the water. In addition to water and weather conditions, the buoy data provides a snapshot into what is happening in and around the Bay, including information on water temperature, salinity and dissolved oxygen.
To learn more about the buoys and the technicians that support them, watch our From the Field video:
From authors to world leaders, inventors to entrepreneurs, the Chesapeake region has been home to some pretty remarkable people. Men such as George Washington, Thurgood Marshall and Edgar Allan Poe are well known for being from the region—but for Women’s History Month, we wanted to celebrate a few of the historic women who have lived and worked in the Chesapeake Bay watershed.
1. Harriet Tubman (1822 – March 10, 1913)
Harriet Tubman, the most famous “conductor” of the Underground Railroad, was born in 1822 in Dorchester County, Maryland. Born into slavery, she escaped to Philadelphia in 1849. Tubman eventually set up a home in Auburn, New York, but returned Maryland not once but 13 times to free family, friends and other slaves, earning her the moniker “Moses.”
During the Civil War, Tubman served as cook, scout, spy and nurse to black Union soldiers. In June of 1863, she guided Colonel James Montgomery and his Second South Carolina regiment, becoming the first woman to command an armed military raid. They destroyed several important Confederate sites and freed over seven hundred slaves. After the war, Tubman returned to Auburn and continued her career as an activist, humanitarian and suffragist. In 1903, she opened the Harriet Tubman Home for the Aged, where she later died in 1913.
2. Euphemia Lofton Haynes (September 11, 1890 – July 25, 1980)
Euphemia Lofton Haynes was a lifelong educator and the first black woman to receive a Ph.D. in mathematics. Born into a prominent family in Washington, D.C., Haynes received her bachelor’s degree from Smith College in 1914. She then began what would turn into a 47-year teaching career, which included elementary, high school and college classes.
In 1930, after receiving her master’s from the University of Chicago, Haynes began teaching at Miner Teachers College (later the University of the District of Columbia), a school dedicated to training African American teachers. She founded the college’s mathematics department and remained its head until she retired. In 1943, she earned her Ph.D. in mathematics from the Catholic University of America, becoming the first black woman to do so. Haynes was appointed to the D.C. Board of Education in 1960 and spent her eight years there fighting racial segregation.
3. Rachel Carson (May 27, 1907 – April 14, 1964)
Rachel Carson is famous for Silent Spring, her groundbreaking book outlining the dangers of pesticides. After receiving her bachelor’s in biology from the Pennsylvania College for Women (now Chatham College) and her master’s in zoology from Johns Hopkins University, Carson went on to work first as a professor at the University of Maryland and then as an aquatic biologist at the Bureau of Fisheries (now the U.S. Fish and Wildlife Service).
Writing was always an important part of Carson’s work, and she found early success when she began publishing her own work. Her first three books, released between 1941 and 1955, were all well-received. The third, The Edge of the Sea, became a best seller, won many awards and allowed Carson to retire from the Bureau of Fisheries to concentrate on researching pesticides.
The resulting 1962 book was the wildly successful—and controversial—Silent Spring. In it, Carson describes the effects of large-scale pesticide use, particularly DDT. While Carson never called for an outright ban of pesticides, the book caused a firestorm nonetheless. President John F. Kennedy established a committee to investigate pesticides, and Carson was asked to testify before a Congressional committee in 1963. She died a year later, but is remembered by many as someone who ignited the environmental movement.
4. Frances Payne Bolton (March 29, 1885 – March 9, 1977)
Frances Payne Bolton had a lasting impact on the Chesapeake Bay as the founder of the Accokeek Foundation. Born into a wealthy Ohio family, she attended schools in Cleveland, Ohio, New York and France. It was after her husband Charles’ death in 1940 that Bolton’s political career began, when she was appointed to serve out his term as a member of the U.S. House of Representatives. Bolton was heavily involved in issues of healthcare and foreign policy, becoming the first woman delegate to the United Nations. She continued to serve in the House until she was defeated for reelection in 1968.
Outside of politics, Bolton was involved in philanthropic work and was particularly fond of Mount Vernon. It was her love of the estate that led her to buy a 500-acre farm in 1955 just across the Potomac River, in order to prevent development that would spoil the view from Mount Vernon. Bolton then founded a land trust, the Accokeek Foundation, in order to preserve and protect the land forever. She served as the foundation’s president until her death in 1977.
5. Vera Rubin (July 23, 1928 – present)
Vera Rubin is a trailblazing astronomer who first proved the existence of dark matter. Although born in Philadelphia, her family moved to Washington, D.C., when she was young, and it was there that her fascination with stars flourished. She attended amateur astronomy meetings and, with her father’s help, built a telescope when she was only 14. In 1948, Rubin graduated from Vassar College as the only astronomy major. Rejected by Princeton because of her gender, she received her master’s degree from Cornell, then returned to D.C. to complete her Ph.D. at Georgetown. From there, Rubin taught at Montgomery County Junior College in Maryland, then worked at Georgetown as a research assistant and later as assistant professor. In 1965, Rubin joined the staff of the Carnegie Institution in Washington, D.C., where she remains today.
In the 1970s, Rubin began researching galactic movement and found that stars on the edges of galaxies moved just as quickly as those in the center. This was unexpected, because from what she could see, there was not enough gravitational pull to keep fast-moving outer stars in orbit. Rubin’s calculations showed that galaxies must contain invisible dark matter that keeps those outer stars in orbit. In recognition of her accomplishments, Rubin was elected to the National Academy of Sciences and in 1993 received the National Medal of Science, the highest American award in science. Being all-too familiar with the challenges women face in the sciences, Rubin makes it a point to be a mentor to other women, saying once that “it is well known that I am available 24 hours a day to women astronomers.”
What other remarkable women have ties to the Chesapeake? Let us know in the comments.