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Celebrating 100 Years of Science! | 1925-2025

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A conceptual diagram illustrates the current threats to native salt marsh species as well as the threats these species will face as their habitat is altered by climate change.
Effects of Climate Change on the Salt Marsh…
A conceptual diagram illustrates the current issues that beach intertidal habitats face as well as the problems they are likely to face in the future as climate change impacts this ecosystem.
The effects of climate change on the beach…
This nematode worm is a parasite, originally from Southeast Asia. With the American eel population already declining, the introduction of this nematode may have a large negative impact on the survival of this species.
Anguillicoloides crassus (Nematode Worm)
Pickleweed is an invasive or introduced plant in Hawaii. It has succulent, brilliant green leaves and is common in salt marshes and tidal shorelines. It grows slowly in soils with high salt concentrations and areas with seawater overwash where it suffers little competition from other plants. The species manages salts by sequestering them in cell vacuoles and eventually shedding the leaves.
Batis maritima (Pickleweed)
The steps in this diagram assist Trust Fund recipients in determining the best experimental design and monitoring method for their water quality monitoring project.
Water Quality Management Decision Tree
In the section of the river above the dam builds up with sediment, making the dam shallower. High water flow causes scouring and the transport of sediment and associated nutrients over the dam. On this other side of the dam phosphorus mobilizes in reaction with salt water. Further down the river seagrass beds grow on the Susquehanna flats.
Conowingo Dam Reservoir and Susquehanna Flats…
The Northern Great Plains Network consists of 13 park units located in the Dakotas, Nebraska and eastern Wyoming. This network consists of 11 ecoregions.
Northern Great Plains Network National Park…
Ranking tributaries by water quality, then by diffuse nitrogen sources can help to determine which watersheds are high priority. High priority watersheds are those responsible for proportionally more nutrient and sediment inputs to receiving waters than other watersheds.
Steps to Identifying High Priority Tributaries
The timing of tropical storms and hurricanes can have major impacts on the life histories of Chesapeake Bay flora and fauna. Changes in water salinity can cause early spawning in some species, such as the blue crab, and increased sediment can cause widespread die-off of seagrasses.
Storm Timing and Impacts on Chesapeake Bay Flora…
This diagram illustrates the main threats from hurricanes and tropical storms. The counterclockwise circulation of winds in the Northern Hemisphere causes maximum winds and maximum storm surges.
Threats from Hurricanes and Tropical Storms
A diagram illustrates the flow capacity for the Mississippi River in thousands of cubic feet per second, based on the 1956 project design flood. The Ohio river is the 200,000 square-mile eastern drainage of the Mississippi River watershed. Diagram from
Flow Capacity for the Mississippi River
Human impacts to Fort Union Trading Post include loss of native grass species, invasive plants and reduced river flow. Methods such as prescribed fire and the planting of native species have been used to restore and protect the site.
Fort Union Trading Post National Historic Site…
Some of the most common threats to the national parks ecosystems include those to quality of air, quality and quantity of available water, and the parks native species. Prescribed fire is used to prevent uncontrolled forest fires and to reduce the growth of nonnative species.
Generic Resources and Threats to the Northern…
While Jewel Cave is currently in pristine condition there are several threats that could potential damage this site. These threats include the pollution of ground water that seeps into the cave at various points and visitor impacts.
Jewel Cave National Monument Threats and Features
While industrialization and urbanization have had a negative environmental impact on the Ohio River today several organizations are working together to combined economic and development opportunities with recreational and ecosystem goals. Diagram from
Main Threats and Key Features of the Ohio River…
A conceptual diagram illustrates the main threats and key features of the Upper-Mississippi River Sub-Basin. Some of these threats include harmful algal blooms, power plants and urban centers. Diagram from
Main Threats and Key Features of the Upper…
The Niobrara River is where six major biomes converge to form a rich diversity of flora and fauna. Threats to the river arise from fire exclusion leading to the expansion of ponderosa pine into grassland area, changes in microclimates, the spread of invasive plants and the high volume of visitors during peak periods.
Niobrara National Scenic River Resources and…
A map shows that land use in the Ohio River Basin is dominated by developed, forested and cropland areas. Diagram from
Ohio River Basin Land Use
A conceptual diagram illustrates the dates and locations of different Mississippi River Report Card workshops. The workshop process is used to bring different groups together to strengthen the report card and promote broad prospectives, dialogue and collaboration.
Mississippi River Report Card Workshop Timeline
The diagram lists potential indicators for the Ohio River Basin that were generated at the workshop. The goals listed in this diagram are representative of the things people value in the Ohio River Basin watershed.
Potential Indicators for the Ohio River Basin
The Lower Mississippi River Basin supports a diversity of uses, dependent upon both natural and human engineered systems. This conceptual diagram illustrates the main threats and key features of the river basin.
Threats and Features of the Lower Mississippi…
As land use in the Chilika Lake area changes from forest to settlements and paddy agriculture sewage, and fertilizer and pesticides runoff increases into the Lake. This extra nutrient input results in algae blooms that float and sit on the bottom.
Chilika Lake Pollution Pressure
While tourism provides economic benefits to local communities surrounding Chilika Lake, tourist activities can have several negative impacts on the environment including air pollution, trash, noise and wildlife disturbances.
Chilika Lake Tourism Pressure
Several connections were made at the Lower Mississippi River Basin workshops. These connections will be used to develop a basin-wide report card for the watershed.
Lower Mississippi Workshop Connections
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