Desert ecology -- Arizona -- Saguaro National Park; Natural history -- Arizona -- Saguaro National Park
The Rincon Mountains are not high enough to provide a fir-forest habitat
except in a few favorable locations. On the highest parts of the
Rincons, ponderosa pines dominate in the warmer, exposed locations, but
whitebarked QUAKING ASPENS grow in pure stands on cooler slopes and with
DOUGLAS-FIRS on the north side of Rincon Peak. West of Spud Rock are
abundant small groves of MEXICAN WHITE PINE.
A cone-bearing tree growing with Douglas-fir—exclusively on higher
northern and northeastern slopes of Mica Mountain—is the WHITE FIR.
Flattened, gray-green needles curving upward from the branches, and
large, green cones growing upright on limbs near the tops of the trees
identify this beautiful evergreen. On open stands, limbs of even the
large trees grow from the trunk almost down to the ground. The bark is
gray or ash-colored.
BRACKEN forms a green ground cover in heavy stands of pine and fir. This
fern grows 3 feet tall over much of the forested Rincon highland. Among
the shrubs found on the mountaintop is the SNOWBERRY, whose leaves are
browsed by deer and whose berries are eaten by birds and chipmunks.
A spring, a small mountain stream, and a meadow near Manning Camp
complete the picture of the higher elevations in the monument. In this
bit of meadowland are found BOXELDER, NEW MEXICAN ALDER, CINQUEFOIL,
CHOKECHERRY, GOLDENROD, ORANGE SNEEZEWEED, MARIGOLD, WILLOW, and a
number of other shrubs, grasses, and herbs characteristic of the high
mountain meadows of the Southwest.
[Illustration: Jerusalem cricket (of a different family from the
true crickets) has legs adapted for tunneling in sand.]
animals
and how they survive
Just as plants depend for their existence on soil, water, and sunlight,
so animals, including man, depend on plants. For green plants are the
basic food producers in nature, manufacturing carbohydrates, proteins,
and other essential compounds from minerals, air, and water, with the
help of chlorophyll and the sun’s energy. Animals get their food either
by eating green plants or by eating animals that have eaten plants.
Microscopic decomposers complete this food chain, breaking down dead
plants and animals into substances that once again can be used by
plants. Since each link in the chain depends on the other links, it’s
not hard to see that a change in one will cause a change in the others.
And because animals depend on plants for cover as well as for food,
their fortunes are doubly tied to the welfare of plants.
Public-domain text, read in full here on John Shaqi.
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