Environment Minister Greg Hunt has stepped up the government's campaign to stop the Great Barrier Reef being listed as "in danger", declaring it the "best managed marine ecosystem in the world".

In a submission to the United Nations World Heritage Committee, Mr Hunt said the government had heard the concerns of the committee about threats facing the reef and "we have acted with renewed vigour".

Greg Hunt said the reef was the best managed marine ecosystem in the world.

The move comes as the Queensland election result casts fresh doubt on the future of mining projects in the Galilee Basin, with Labor leader Annastacia Palaszczuk pledging Labor will end taxpayer subsidies for Galilee coal and associated rail projects if it forms government.

The expansion of coal terminals at Abbot Point has been central to the World Heritage Committee's concerns for the reef.