please state details
2007-02-07 13:12:23 · 4 answers · asked by sexyjay1962 1 in Environment
You need to be more specific. I'll just start with the local area. Drought weakens the local pine trees allowing pine beetles to infest and kill them. You can tell this is the problem because you will start seeing a lot of pines browning at the ends of the needles and eventual the hole tree dies. There are also various diseases and insects that naturally kill trees.
2007-02-07 13:17:58 · answer #1 · answered by mad_mav70 6 · 0⤊ 0⤋
It depends on the specific situation. For example, inGlacier National Park, many trees are being killed by a fungus that didn't exist in the area a few decades ago (The masses of ice kept the temperature down far enough that this particular fungus couldn't live there). however, global warming has melted the glaciers enough that the area is now warm enough for the fungus to survive--so its infecting trees in the area.
2007-02-07 22:02:42 · answer #2 · answered by Anonymous · 1⤊ 0⤋
Wood-boring insects like the Japanese Beetle and termites and so on can kill trees.
2007-02-10 00:17:55 · answer #3 · answered by Professor Armitage 7 · 1⤊ 0⤋
um, more often that not it is the following:
fire
flood
landslide
climate change
people chopping them down
animals taking them down in one form or another
2007-02-07 21:16:16 · answer #4 · answered by Dashes 6 · 1⤊ 0⤋