A dry river bed in south Australia.
Freshwater fish are suffering as drought becomes more common and severe. Whether they survive will depend on how governments manage rivers and lakes, and on taking action against climate change.
Spawning sockeye salmon make their way up the Adams River near Chase, B.C.
THE CANADIAN PRESS/Jonathan Hayward
Populations of freshwater species are in a state of deep decline. But we know why and we can reverse the trend.
Researchers are finding plastics in fish in freshwater ecosystems.
Ocean plastic has gained notoriety, but we're starting to realize that microplastics pollute our freshwater and terrestrial ecosystems too.
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.
Lake Tarawera, seen from its outlet, has excellent but declining water quality.
The ecological health of New Zealand's lowland rivers and lakes is in decline, but principles borrowed from drinking water safety could help reverse the degradation.
A new report finds concerns about water infrastructure tops the list for Canada’s water providers.
World Water Day shines a light on the importance of safe, clean drinking water, but a new report finds Canada's freshwater systems are under stress.
Demonstrators at a 2010 Toronto rally protesting the mercury contamination of the Wabigoon-English waterway in northwestern Ontario carry long blue banners meant to represent a river.
(THE CANADIAN PRESS/Chris Young)
The declared end of Flint, Mich., contaminated water crisis echoes similar claims worldwide. Evidence shows victims of past and ongoing water crises, especially Indigenous people, continue to suffer.
Coal mines, such as this one near Bowen, use water for everything from equipment cooling to dust management.
Adani's controversial Carmichael coal mine in Queensland's Galilee Basin has been granted an unlimited 60-year water licence. But a range of measures could help the industry use less freshwater.
The Murray-Darling is a complex freshwater ecosystem.
Murray River wetlands image from www.shutterstock.com
Tempers have flared once again over the long-term plan to return water to the Murray-Darling River and improve its health.
Flooding in Wangaratta, Victoria.
Floods are often seen as a force of destruction. But as river ecologists, we find it hard not to rejoice at the flooding.
Scientists are pioneering a new way of monitoring water species, using techniques more familiar to fans of crime scene TV shows.
Spangled perch are one of Australia’s strongly migratory native fish. After storms in January 2015 these fish were actively travelling up a flooded road in outback Northern Territory.
Freshwater fish are declining everywhere, in part thanks to dam-building. But we can have both.
Moo-ve along: livestock are one of many threats to Australian freshwater ecosystems.
Freshwater covers only 0.5% of the Earth's surface but is home to 10% of the world's lifeforms.
The Louisiana swamp crayfish Procambarus clarkii.
The introduction and spread of invasive freshwater crayfish into Africa threatens the continent's freshwater biodiversity.
One of Melbourne’s drinking water reservoirs at 30% capacity in 2010. At the time of writing, the dam is 60% full.
Despite its long idle, Melbourne's desalination plant plays a vital role in providing water in a drying climate.
So much water has gone into groundwater it has slowed rising seas.
Bore image from www.shutterstock.com
There's enough water under the ground to form a lake 100m deep over the earth.
The remote rivers of northern Australia could be home to untold numbers of new and threatened fish.
Matthew Le Feuvre
A score of new fish species discovered recently in northern Australia remind us how little we know about our country.
Pretty, but also pretty nasty.
Willem van Aken/CSIRO/Wikimedia Commons
With El Niño ramping up, Australia is in for a long, hot, dry summer - perfect conditions for blue-green algae. And that innocuous-looking pond scum can pack a toxic punch if you're not careful.
New Delhi’s Yamuna River, like much of India’s water, is polluted. The world urgently needs low-carbon ways to clean things up.
Much of the world still lacks access to proper sanitation and clean water - an issue that needs urgent action. But without low-carbon technologies, clean water could come at the expense of the climate.
Waterbugs are used for the monitoring of river ecosystem health across the world.
Around the world, waterbugs are the most widely-used indicator of environmental health and pollution of rivers, lakes and wetlands.