Dossier
Freshwater Ecosystems
Coverage of Freshwater Ecosystems in the Nexus archive.
- Scientists warn that the world’s rivers are running out of oxygen
Rivers worldwide are losing dissolved oxygen, with nearly 80% of over 21,000 river systems affected over four decades, primarily due to climate change, threatening fish and biodiversity. Tropical rivers are being hit hardest. This loss endangers freshwater ecosystems' overall health.