River deltas are among the most complex and productive environments on Earth. Yet, they face serious threats from upstream industrialization and climate change, which alter supplies of water, sediment and contaminants. Even deltas distant from densely populated and industrialized areas are not immune to these stressors.
Nestled in a remote area of northeastern Alberta is the world’s largest freshwater boreal delta. Spanning 6,000 km², the Peace-Athabasca Delta is the traditional territory of Indigenous nations and a haven for biodiversity. The Delta is recognized internationally as a Ramsar Wetland of International Importance. It also contributes to Wood Buffalo National Park’s designation as a UNESCO World Heritage Site.
Despite these recognitions, concerns have persisted for decades that hydroelectric dams on the Peace River, oilsands mines along the Athabasca River and climate change are degrading the Delta by reducing freshwater availability and increasing contaminants.
