Challenge question #3

susamel@juno.com
Mon, 2 Mar 1998 23:14:16 -0500

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I suppose that biologists felt it was important to establish additional
flocks of whooping cranes because they did not want the one flock of 22
cranes to die. This would mean the species would become extinct. There
are many concerns that the biologists could have about leaving the one
flock on their own. For instance, the whooping cranes might not be able
to complete their migration due to bad weather. The cranes might
experience breeding problems and not increase their numbers. Some cranes
might not find sufficient food or might be hunted to extinction. There
may also be environmental concerns. The entire food chain that depends
on the cranes could be changed. For example, in Texas or Nebraska, the
insects they naturally eat will have no limiting factor and continue to
increase. There could be an overgrowth of mollusks and minnows, part of
the crane's diet. The snails they eat might reproduce uncontrolled over
eating algae, which in turn will effect other animals and even the snails
themselves who will run out of food. When one part of a food chain is
changed it effects the entire ecosystem.

Hope Buickerood
Iselin Middle School - 7th grade

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