All harvesting of trees on public lands shall be done in accordance with a management plan approved by the board, and in accordance with the provisions regarding conservation of aquatic life, wildlife, and land plants, and the provisions regarding environmental impact statements. For any harvesting of native trees from public lands, the department shall use existing fire prevention and management programs and ensure that appropriate silvicultural practices are used to encourage native biodiversity and ecosystem processes. No native forests on public lands shall be converted to introduced forest plantations.