Climate change is killing US forests

http://www.newscientist.com/channel/life/mg19526224.600-climate-change-is-killing-us-forests.html


Summary:In the Sierra Nevad mountains the climate chande is eroding the health of pine and fir trees. Ecologists have been tracking the fate or more than 21,ooo trees. Scientists looked at the first 22 years of a record, and they noticed that mortality rates of both pine and fir trees had increased. The rate at which new trees established did not change.


Ecology

What kind of relationship is being described in the article? The trees are thre life of the Sierra Nevava Mts.

Describe the niche being discussed in the article.the trees are bing killed and not replenessed

List three things you learned from this article in your own words.Humans re killing trees, ecology, and the life of the mt.

What impact would the topic of the article have on the biosphere? The Earth will get hotter and there will be even less oxygen.