Dartmoor National Park could axe 20 jobs
Bosses at Dartmoor National Park say a cut in government funding means 20 full-time positions could go by 2014.
The park faces a £1.2m cut from a Department for Environment, Food and Rural Affairs (Defra) grant by 2014/15.
Defra gives the park about £5m each year but the park authority, which has the equivalent of about 100 full-time staff, has lost 10% of its workforce over the past year.
The authority warned more staff would have to go.
Chief Executive Kevin Bishop said the park was looking at different ways to raise income.
"Being realistic there's no way we can fill the complete funding gap caused by the reduction of the Defra grant," he said.