The San Pedro Mezquital River is the last free-flowing river in Mexico’s western Sierra Madre.
Thousands of hydropower dams are under construction around the world. New research shows that by cutting off sediment flow, these dams can have big ecological effects on far-off bays and deltas.
Phragmites, an invasive species, line this marsh at Sachuest Point in Middletown, Rhode island.
Phragmites australis, an invasive reed, has taken over wetlands across the US. But it also stabilizes shorelines and harbors many fish and birds. Is it time to compromise with this alien?
Carbon storage in Australian mangroves can help mitigate climate change.
One surprising potential benefit of sea-level rise is it helps coastal wetlands store more carbon.
Marshes at Blackwater National Wildlife Refuge on Maryland’s Eastern Shore.
Marshes, swamps and other kinds of wetlands provide valuable services, such as effective natural flood control. But they are being destroyed for development in many parts of the world.
Mangrove forest in Pichavaram, Tamil Nadu, India.
Mangrove forests along the world's tropical and subtropical coasts store enormous quantities of 'blue' carbon – especially in river delta zones, where soil builds up quickly.
How much should a council pay to protect private beachfront properties?
How far will we go to protect high-risk beachfront property? New research suggests local councils are too willing to spend public money to protect private landowners from coastal climate change.
Cumberland Island National Seashore off the coast of Georgia.
How do the narrow ribbons of sand that line the Atlantic and Gulf coasts withstand the force of hurricanes? The answer lies in their shape-shifting abilities.
Waves lap against the shore on the south coast of England and the North coast of France – but the answer to this puzzle is in the wind and the land, not the waves themselves.
St Agnes, Cornwall.
If we know what makes species tick, we can start truly understanding life on the UK's coast.
Little Missouri River, North Dakota.
Recent research shows that US rivers are becoming saltier and more alkaline. Salt pollution threatens drinking water supplies and freshwater ecosystems, but there is no broad system for regulating it.
Mangroves in the Florida Everglades.
As Earth's climate warms, mangroves are expanding north and south from tropical zones. Mangroves reinforce shorelines and store huge quantities of carbon, so protecting them is an effective climate strategy.
Coastal municipalities need to prepare for higher chances of storms and rising sea levels.
AP Photo/Jim Cole
A climate scientist explains how New Hampshire managed to overcome the political divide to make real progress on climate change.
Australia’s coastline has moved before thanks to changes in sea level.
Flickr/Travellers travel photobook
People have been forced to move in the past thanks to changes in sea levels that affected Australia's coastline.
Dooagh beach, Ireland.
A entire beach in Ireland has returned 33 years after being washed away.
Early in the morning and late in the evening is when shorebirds escape disturbance on the beaches on which their survival depends.
We aren’t just jostling with each other for beach space. Scuttling, waddling, hopping or flying away from beachgoers all around Australia, wildlife struggles to survive the daily disturbances.
Mangroves have died along a 1,000km stretch of coastline in the Gulf of Carpentaria.
In early 2016 reports appeared that vast swathes of mangroves had died in the Gulf of Carpentaria. It now appears heat and drought were to blame.
Residents of Collaroy, NSW, got a painful lesson in the power of the ocean in June.
AAP Image/Dean Lewins
Many Australians live on the coast, but how much do we know about the risks? While average sea levels are relatively easy to gauge, the risk of flooding also depends on weather, landscape, and climate.
Storm damage and a high tide in Adelaide.
Witness King Tides/Flickr
Australia's coastal towns are already facing storms and erosion – problems that are set to get worse with rising seas.
Bathers on Perranporth beach in Cornwall stay in the safe area marked by lifeguards, with large rip currents visible to either side.
Knowing how rip currents form and how to spot them could save your life.
Damaged property in Sydney following recent wild weather.
AAP Image/David Moir
Wild seas have left beaches eroded and houses close to collapse.