Scientists expect the Chesapeake Bay to see a slightly smaller than average dead zone this summer, due to reduced rainfall and less nutrient-rich runoff flowing into the Bay from the Susquehanna River this spring.
Dead zones are areas of little to no dissolved oxygen that form when nutrient-fueled algae blooms die and decompose. Resulting low-oxygen conditions can suffocate marine life. The latest forecast predicts an early-summer no-oxygen zone of 0.27 cubic miles, a mid-summer low-oxygen zone of 1.37 cubic miles and a late-summer no-oxygen zone of 0.28 cubic miles. This forecast, funded by the National Ocean and Atmospheric Administration (NOAA), is based on models developed at the University of Maryland Center for Environmental Science and the University of Michigan.
Nutrient pollution and weather patterns influence dead zone size. According to the U.S. Geological Survey (USGS), 58 million pounds of nitrogen entered the Bay in the spring of 2015, which is 29 percent lower than last spring’s nitrogen loadings.
Researchers with the Maryland Department of Natural Resources (DNR) and the Virginia Department of Environmental Quality (DEQ) will measure oxygen levels in the Bay over the next few months. While the final dead zone measurement will not take place until October, bimonthly updates on Bay oxygen levels are available through DNR’s Eyes on the Bay.
Like animals on land, critters in the Chesapeake Bay need oxygen to survive. But persistent nutrient pollution—and the algae blooms that result—mean some fish and shellfish have a hard time finding the oxygen they need to survive and thrive.
Under water, oxygen is present in dissolved form. When nutrient-fueled algae blooms die, the bacteria that arrive to decompose them use up oxygen in the water, leaving little for fish and shellfish and creating so-called “dead zones.” Increased nutrient pollution leads to larger algae blooms, which in turn create more dead zones.
Scientists measure dissolved oxygen as part of their work to determine the health of an ecosystem. Because an animal’s size and habitat determine how much oxygen it needs, scientists have set different dissolved oxygen standards for different aquatic habitats at different times of the year. An American shad, white perch or other fish found in shallow water, for instance, needs more oxygen than a worm, clam, oyster or other invertebrate found on the Bay’s bottom. While the former thrive at dissolved oxygen concentrations of 5 milligrams per liter of water, the latter need just one. The Bay’s infamous blue crabs and oysters, on the other hand, need dissolved oxygen concentrations of three milligrams per liter to thrive.
According to recent data, between 2011 and 2013, 24 percent of the water quality standards for dissolved oxygen were met in the deep-water habitat where bottom-feeding fish, blue crabs and oysters are found. Because the Chesapeake Bay Program has set a goal to achieve the clean water necessary to support aquatic resources and protect human health, our partners are working to reduce pollution and bring the Bay up to water quality standards. Learn how you can help.
Last year, our partners opened 17 boat ramps, fishing piers and other sites that grant public access to rivers, streams and the Chesapeake Bay. Virginia opened 14 sites, while Maryland, Pennsylvania, and New York each opened one. There are now 1,225 public places that allow people across the watershed to walk, play, swim, fish and launch their paddleboats, sailboats and powerboats into the water.
Partnerships between local, state and federal agencies and non-profit organizations have been essential in developing these sites: a soft launch for paddlecraft opened on the Chickahominy River with support from the James River Association. Walking trails, wildlife viewing platforms and interpretive signs were built on U.S. Fish and Wildlife Service land along Mount Landing Creek with support from the Virginia State Park Youth Conservation Corps. And a boat dock, wildlife viewing platform and public pavilion, as well as fishing access, were established at the Zimmerman Center for Heritage on the Susquehanna River with support from Pennsylvania’s Fish and Boat Commission, Department of Conservation and Natural Resources, and Department of Transportation, as well as the National Park Service and local donors.
As development continues across the watershed, demand for places that allow the public to reach the water remains high. State, federal and local governments are often the guardians of these places, providing opportunities for everyone to enjoy the region’s natural and cultural bounty. Because physical access to the Bay and its tributaries remains limited—with real consequences for quality of life, the economy and long-term conservation—our partners set a goal in the Chesapeake Bay Watershed Agreement to bring the total number of access sites in the watershed to 1,439 by 2025. And because public access to open space and waterways can create citizen stewards who care for local resources and engage in conservation, we track public access as an indicator of our progress toward fostering environmental stewardship.
“As an avid kayaker, I know the importance of having access to rivers, creeks and streams throughout the Chesapeake Bay watershed,” said Bay Program Director Nick DiPasquale in a media release. “As we come to know the resource through access to it, we will understand its value. Once we know its value, we will be more inclined to take actions to protect it. Public access is critical to restoring this vital ecosystem.”
During the summer months, butterflies, hummingbirds, bats and beetles can be seen darting from flower to flower, collecting nectar and carrying pollen. But no pollinator has quite as close a relationship with humans as the European honeybee. Found on every continent except Antarctica, the honeybee has been facing enormous environmental pressure in recent years, resulting in mysterious mass die-offs. Learn more about this iconic insect—and what you can do to help—with this list of nine honeybee facts.
1. The European honeybee is an introduced species. Honeybees may be one of the most recognized insects in the nation, but they’re actually relative newcomers to North America. Just like sheep, cows and chickens, honeybees were brought from Europe by early settlers, arriving in Virginia around 1622.
2. Those swirling swarms are nothing to worry about. A teeming cluster of honeybees may seem menacing, but a swarm of honeybees is actually when the insects are at their safest. When a colony gets big enough, the queen bee will fly off in search of a new home, taking a portion of the colony with her, while a new queen takes her place in the old colony. Because they’re not defensive of a hive or stores of honey, these swarms pose little threat to humans. They may make brief stopovers on tree branches, walls or road signs, but will most likely take off on their own within a day or two. If a swarm makes you nervous, call a local beekeeper to come safely remove the bees.
3. Honeybees typically only sting when they sense the hive is threatened. When out foraging, bees will rarely sting unless they’re roughly handled. If a bee is buzzing around you, she may smell a flowery perfume or lotion and think the smell is a food source—but if you stand very still, she will realize there is no nectar and fly away.
4. The average American eats one pound of honey each year. To make that pound of honey, a colony of bees would have to fly more than 55,000 miles and visit two million flowers. One bee collects just 1/12 teaspoon of honey in her lifetime.
5. Close to one-third of all the food Americans eat is directly or indirectly benefitted by honeybee pollination. This amounts to more than $15 billion in crop production each year. Crops like fruits, vegetables, seeds and nuts benefit from honeybee pollination, and some foods—almonds in particular—are completely dependent on honeybees.
6. A syndrome has caused the honeybee population in the U.S. to drop by more than half since the 1940s. Colonies affected by Colony Collapse Disorder (CCD) appear as a suddenly empty colony—no adult bees or dead bee bodies are near the hive, but the queen and some immature bees may still be present. No causes have been proven, but scientists are researching pesticides, disease, parasites and habitat degradation as possibilities.
7. Honeybees are highly social insects that are able to communicate through complex movements. Their “round dance” and “waggle dance” allow them to communicate the direction and distance to nectar and pollen. But the use of pesticides—in particular those containing neonicotinoids—may cause disorientation and memory loss, meaning bees have difficulty finding food or returning to their hive.
8. A diverse diet helps bees resist the effects of disease, parasites and even pesticides. But single-crop fields often lack the variety of plants needed by bees for proper nutrition. By planting wildflowers in marginal land, at the end of fields or along streams, farmers can help provide the variety of pollen and nectar that bees need.
9. To a honeybee or other pollinator, a manicured lawn is more like a desert. Reducing the size of your lawn and allowing native wildflowers to grow benefits honeybees, native pollinators and other wildlife. You can also plant a pollinator garden, with native plants that flower at different times to provide a consistent source of food.