1. what are the names of the two species damaging bristlecone pines? 2. what is a blister rust, and why is it now presenting a threat to these trees?
3. how old is the oldest bristlecone pine in the United States, and how do scientists explain the species extreme longevity? how might rising temperatures affect this species?
4. why has the population of native pine bark beetles exploded?
5. what are scientist doing to protect bristlecone pines?