PPT Slide
In the flat alluvial basins
(bajadas) between mountain
(forests) occur. Mesquites
are very deep-rooted, but
around Tucson, some bosques
levels declined due to with-
drawal for urban/industrial uses.
Surrounding the bajadas are ranges
of mountains (some topping out at
2,500 m) known as “sky islands,”
for they are covered by vegetation -
often trees such as these junipers in
the Santa Rita range near Tucson -
that belong in colder climes. In the
desert, elevation ? wetter, cooler