"If members of the public want to act this way they could face going to jail, it is that serious," Judge Cocurullo said.
In a written statement, DoC solicitor Mike Bodie said the sentencing illustrated how DoC was working with the wider community to address illegal activity and it sent a clear message that DoC would prosecute.
"Removal of native vegetation impacts on the conservation values of public conservation land. Vegetation has important ecological value and any attempts to remove it will be taken seriously."
The maximum sentence for the offence is two years' imprisonment and a $100,000 fine, and offenders risk forfeiture of vehicles, trailers and equipment. DoC urges anyone who sees suspicious activity around local reserves or conservation areas to immediately call the toll free number 0800 DOCHOT (362 468).