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General Environmental Science I
ENV 121
LAB: Species Interactions
Name: _____________________________
.
Your prediction:
After 100 Generations of competition, one of the plant species (the weakest) will no longer be viable.
1. What assumptions does this model make about the resources in the ecosystem over time? Is this assumption likely
to work in a natural environment?
Considering that the dominant species of plant, was able to maintain a constant population over the 100 days, this
means that this model assumes that the resources in this ecosystem are enough (limited) to accommodate 10.000 of
this species over time. This may be considered realistic, however in real life, we would expect decreases and increases
around the average number of species (Like for example, two trees die, but two new trees replace them…). Had
resources been infinite, we would’ve most likely seen an increase over the 10.000 mark.
2. Do you find one producer to be dominant? In a natural community, what characteristics might allow one species to
be dominant over another?
One tree species was clearly dominant. Such dominance may be acquired via characteristics such as being better at
producing their metabolic needs, or better resistant to disease or external factors (better ability to survive, overall)
3. What is primary succession? Why do plants, no...