A Far North marae is urging people to keep their motorbikes and four-wheel-drives off the dunes at two popular beaches, before they are damaged irreparably.
Last week signs instructing riders and drivers to stay off the dunes were erected at entry points to Tokerau Beach and Puwheke Beach, on the Karikari Peninsula, by local hapū Te Whānau Moana and Te Rorohuri.
Haiti-tai-marangai Marae chairman Thomson Lawrence said the decision had been made after years of concern about increasing erosion of the dunes and damage to wāhi tapu. People had been taking vehicles into the dunes for about 30 years, but the problem had worsened as four-wheel-drives had become more common and more powerful.
"At one time these dunes were covered in all sorts of greenery and grasses. Now it's getting to the stage where they will end up as a desert," Mr Lawrence said.
The hapū had erected the signs on Wednesday last week, and while vehicles had been heard "roaring around in the dunes" over Easter, it was too soon to say how the public would respond.