Controlled burns are a effective way to remove undesirable weed species. Burns also regenerate growth that may not have had a chance to thrive due to less desirable plant types. these pictures are of grassy fields being burned, however there are many burns that have been done and many scheduled for forest areas that will create new cover and food sources, for many different types of wildlife.
Please remember prescribed burns should only be performed by professionals. Fires can be unpredictable and dangerous if you are untrained on fire controls.