My question is:

How are the tribes of the Amazon and other rainforests affected by deforestation?

Check these sites.

http://news.mongabay.com/2008/1005-surui.html

http://www.boston.com/news/world/latinamerica/articles/2005/06/26/crops_cutting_into_amazon_rain_forest/

http://impressionsofearthblog.wordpress.com/2008/08/22/satellite-photos-of-the-amazon-deforestation-indigenous-tribes-and-their-land/