Scientists are puzzled by a disturbing trend in the waters along four Gulf Coast states. Almost 300 dead and dying dolphins have washed ashore since February, three times the usual number. Mark Strassman reports.

This video shows how Rijkswaterstaat uses sand to keep the Dutch coast safely in its place. In this way the Netherlands is protected against the sea.

Wetlands contribute to the national and local economies by producing resources, enabling recreational activities and providing other benefits, such as pollution control and flood protection. While it can be difficult to calculate the economic value provided by a single wetland, it is possible to evaluate the range of services provided by all wetlands and assign a dollar value. These amounts can be impressive. According to one assessment of natural ecosystems, the dollar value of wetlands worldwide was estimated to be $14.9 trillion. (Source: Costanza et al.

Development can have negative effects on streams in urban and suburban areas. As a watershed becomes covered with pavement, sidewalks, and other types of urban land cover, stream organisms are confronted with an increased volume of storm water runoff, increased exposure to fertilizers and pesticides, and dramatic changes in physical living spaces within the stream itself.

In this episode of Voice of the Sea, we investigate how engineers study and design buildings to withstand destructive forces, like tsunamis. We'll learn about the dangers to Hawai'i, the plan for vertical evacuation in Honolulu, and the new building code.

The EnviroAtlas Interactive Map is a discovery and analysis tool for hundreds of data layers relating to ecosystem services, biodiversity, people, and the built environment.

The research presented in this webinar is one of the largest and longest running projects of its kind and helps to clarify the potential benefits and limitations of targeted wetland restorations. The research methods are also being used to monitor the impact of in-field practice changes through the Conservation Learning Lab project.

This map provides a spatial look at CPRA projects in Louisiana, sorted by project type. Users can access factsheets about each project by clicking on the icons.

With its high incidence of storms and hurricanes and valuable ecological and economic resources, the Gulf region is a high-risk area with great potential to demonstrate natural risk reduction solutions. The Coastal Resilience approach and tools have been applied Gulf-wide and at specific sites, including those that help identify where to implement oyster reef restoration to meet social and ecological goals.

Look beyond the beauty of our coastal wetlands and you'll find this habitat hard at work. Wetlands filter our water, protect our coastal communities from floods, and provide habitat for fish and other wildlife. Coastal wetlands are some of the most productive ecosystems on Earth, and generate more than half of commercially harvested seafood in the United States. In 2015, U.S. fisheries supported 1.6 million jobs (a 1 percent increase from 2011) and contributed $208 billion in sales (a 12 percent increase from 2011).