 B. verticillata is significantly threatened by at least three microorganisms . Several populations have reduced or vanished from dieback ( Phytophthora cinnamomi ) , such as those at Two Peoples Bay Nature Reserve and Gull Rock National Park . The honey fungus Armillaria luteobubalina has killed plants in <unk> National Park , and aerial canker ( Zythiostroma ) has decimated populations at <unk> National Park east of Albany . 
