Your New Lists
Rearrange the fauna and flora according
to their taxonomic order, but separate the mammals into two groups-herbivores
and carnivores. This should enable you to recognize biotic relationships not
even hinted at in the original list. Your rearranged list would be similar to
the below chart.
Finding answers to the following questions will reveal the superiority of
the rearranged list over the original data. In modern ecosystems there are
usually more individual herbivores than carnivores. Was this true of the
Does the list give evidence of still undiscovered
carnivores and herbivores at Irvington? Assuming that it does, would the
discovery of these animals make such difference in the listed
carnivore-herbivore ratio? Why?
You now have the basic components necessary for reconstructing our
extinct ecosystem: (1) the nonliving surrounding, found in Dr. Savage’s
description of the Irvington sediments, and (2) the animals and
plants. In other words, information to this point has provided us with a
reasonably clear picture of the ancient Irvington environment and the kinds of
organisms that lived in that environment.
ground sloths (two kinds)
camels (two kinds)
sabercats (two kinds)