Geography 2152F/G Lecture Notes - Lecture 7: Lone Pair, Jemez Mountains, Silt
16 Jan 2018
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Fire is native to western forests; is as important as rain to their health. Nourishes soil, spreads seeds, creates openings for sunlight, ensures habitat for all sorts of creatures. Eliminating forest fires = turning woods into beetle buffets. Jack pines live as far east as nova scotia & upper midwest & new. Jack pines stretch right across canada: in the past, the relationship between beetles and the forest was considered mutually beneficial. Explain how that has changed in recent years. Most bark beetles lay eggs under bark that"s dead or dying. Only a few species burrow into healthy trees, and those mostly go in as a lone pair, posing no threat. The mountain pine beetle is the bad bug of the bunch. For centuries, relationship was mutually beneficial: pine beetles culled older, weaker trees, producing new beetles but also a healthier forest.
