The five following parameters are basic to life within aquatic systems. Impairments of these can be observed as impacts to the flora and or fauna with a given waterbody. [Dissolved oxygen] is the amount of oxygen dissolved in water. Most aquatic organisms need oxygen to survive and grow. Some species require high DO such as trout and stoneflies. Other species, like catfish, worms and dragonflies, do not require high DO.

Recently the possibilities for creating wetlands in and around towns and cities have been given more attention, following the disappearance in recent decades of large stretches of wet nature, and thus also natural buffers, as a result of urban expansions and land drainage. Wetlands are created to buffer some of the run-off from precipitation and slow the rate at which it drains away. This is a new approach compared with rapid drainage systems using ditches and pipes.

Changes in landuse, seasonal variations in our weather and longer-term changes to climate can all affect surface water, groundwater, the flows between them, and the amounts of salt that they contain. The term "salinity" refers to the concentrations of salts in water or soils. Salinity can take three forms, classified by their causes: primary salinity (also called natural salinity); secondary salinity (also called dryland salinity), and tertiary salinity (also called irrigation salinity).

Coastal marshes are threatened by relative sea-level (RSL) rise, yet recent studies predict marsh survival even under the high rates of RSL rise expected later in this century. However, because these studies are mostly based on short-term records, uncertainty persists about the longer-term vulnerability of coastal marshes. We present an 8500-year-long marsh record from the Mississippi Delta, showing that at rates of RSL rise exceeding 6 to 9 mm year?1, marsh conversion into open water occurs in about 50 years.

After [Hurricane Katrina], community members formed a faith-based nonprofit called the Zion Travelers Cooperative Center. Their work began as a grassroots recovery effort, with neighbors helping neighbors gut houses and remove debris, to prepare for rebuilding. Today, the group's work continues. They educate residents about climate change and how rising seas and increasingly intense storms threaten the area. And members advocate for solutions that could help protect them, including wetlands restoration and stronger levees.

The most common argument for the use of nuclear power over power from conventional fossil fuels is the diminished environmental impact that nuclear power promises. While nuclear fission reactions do not directly produce greenhouse gases like fossil fuel combustion, power plants affect the environment in a myriad of ways. In order to elucidate a clearer environmental impact comparison between all power generation methods, including renewables, less obvious environmental effects must be adequately assessed.

Ambitious dreams have now become a reality as the Ocean Cleanup deploys its $20 million system designed to clean up the 1.8 trillion pieces of trash floating in the Great Pacific Garbage Patch. Check out another Forbes piece on how Ocean Cleanup aims to reuse and recycle the ocean plastic. The floating boom system was deployed on Saturday from San Francisco Bay and will undergo several weeks of testing before being hauled into action. The system was designed by the nonprofit Ocean Cleanup, which was founded in 2013 by 18-year-old Dutch inventor Boyan Slat.

Salt marshes are among the most ecologically productive and diverse ecosystems in the United States. They provide important services such as floodwater storage and storm protection for coastal cities such as New Orleans. Healthy marshes also serve essential roles in carbon sequestration, a service of primary concern at current emission rates of the greenhouse gas carbon dioxide, nutrient removal and water purification.

Native Americans have lived on these lands since time immemorial. Their roots are deeply embedded in the land, waters, and genealogy of this place. During National Native American Heritage Month we celebrate the countless contributions of Native peoples, their important history, present perseverance, and future. The NOAA Marine Debris Program is proud to work with indigenous communities in stewardship efforts that help to understand and reduce the impacts of marine debris.

A 10-year-old girl walks to the edge of the Kansas River in Topeka, Kansas, rolls up a note, and slips it into a plastic bottle before sending it downstream. Sixteen years, hundreds of miles, and two rivers later, Michael Coyne-Logan, an educational facilitator for Living Lands and Waters, hoists it from the Mississippi River in St. Louis. That is one bottle among the millions of pounds of trash that he and his cleanup crew have collected in recent years as they try to make a dent in the enormous amount of garbage floating down the Mississippi.