Alec Marr, who was part of the Tasmanian environment groups delegation to the World Heritage Committee meeting, has called on Senator Richard Colbeck to resign for his role in the failed attempt to delist 74,000 ha from the Tasmanian World Heritage Area.

Alec Marr said on Radio National Breakfast this morning that Senator Colbeck has "done more damage to Australia's standing in the World Heritage Convention than...anything else in the last 30 years" and should resign immediately.

Listen to the full interview here.