Australia's most populous state announced Tuesday a logging ban in a forest haven for koalas, aiming to protect the local population from being wiped out.

Logging has been halted in 8,400 hectares (21,000 acres) of forest, home to 106 "koala hubs" that are highly populated by the marsupials, the New South Wales government said.

The koala-rich area would form a key part of a planned 315,000-hectare Great Koala National Park on the mid-north coast and "save koalas from extinction in the state", it said.

The move was a "historic step forward", said Nature Conservation Council acting chief executive Brad Smith, describing the area as "the most important koala habitat in the world".

"This decision is also a recognition that logging has a devastating impact on koalas and biodiversity," he added.

WWF-Australia spokesman Dr Stuart Blanch said koala numbers in NSW had suffered a dramatic decline, falling by more than 50 percent between 2000 and 2020 due to deforestation, drought and bushfires.

The government's move "is a chance to turn this tragedy around", he said.

"If we're going to save koalas from extinction this century, then we need massive new protected areas covering millions of hectares of forests."

Environmentalists called for logging to be halted across the entire Great Koala National Park area.

The state government said it would soon begin consultations with state-owned logging agency Forestry Corporation NSW to "determine timber supply options".

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