It's illegal to cut down trees on King Island, a recognised conservation park.
Visitors will now have no excuse if they are found damaging, destroying, axing or harming native trees on the island after two warning signs were erected on Wednesday.
The signs are a joint effort by Redland City Council and the state government's parks and wildlife service to crack down on tree vandals.
A $1700 councillor grant was spent on producing the signs, which tell visitors no dogs, no camping, no destroying trees and no open fires in the conservation park, which attracts International wader birds every year.
Division 1 councillor Wendy Boglary said vandals had chopped down at least seven trees to use for firewood and a humpy on the island in the last week.
"There's limited vegetation on the island and with people wrecking the trees the erosion was increasing," Cr Boglary said.
"The island is a conservation park and is part of Redland City - not Brisbane - as was previously thought."
Concerned resident group Friends of King Island formed in 2013 to ensure the island was adequately protected and did not erode or wash away.
King Island Conservation Park is dedicated under the Nature Conservation Act 1992 and must be managed under section 20 of the Act to conserve and present the area’s cultural and natural resources and their values.
Management of the island must provide for the permanent conservation and ensure any commercial use of the area’s natural resources, including fishing and grazing is ecologically sustainable.
King Island Conservation Park was initially declared an environmental park in 1975 and subsequently regazetted as a conservation park in 1994.
The park consists of about one hectare of mangroves and littoral dune vegetation and occurs within the southern coastal lowlands environmental province of the South East Queensland biogeographic region.
Although small in size, the park acts as a nucleus for extensive sand flats, rubble banks and seagrass beds which are important feeding grounds for migratory wading birds.
The conservation park is surrounded by Moreton Bay Marine Park and is included within the Moreton Bay Ramsar site, which is recognised as a wetland of international importance.