A long stretch of the Murray River and the massive Macquarie Marshes wetland in NSW could soon be designated "threatened ecological communities" by the federal government. Here's what that means.

A new campaign from the Nature Conservancy of Canada is aimed at raising $5 million to protect 202 hectares of land on the Point Pleasant peninsula near Murray River in eastern Prince Edward Island.

A nomination for critically endangered conservation status for the Lower Murray is a step too far, say some in South Australia, while others insist it's needed to ensure the river's health.