Using a site in Northern California, you repeat Stiling and Drake's experiments in elevated and ambient CO2 chambers, and achieve similar results. However, you notice that for one species of herbivore, the mortality rate from predators and parasitoids is equal in the elevated and ambient chambers, while the mortality rate due to nutritional inadequacy is higher in elevated chambers. The herbivore species in question is native to Asia and has only recently arrived in the United States. What is a likely explanation for your findings?
A. Individuals of the Asian herbivore species thrive in the elevated CO2 chamber, growing so large that natural enemies no longer attack them.
B. CO2 becomes toxic to the Asian herbivore at the levels found in the elevated chambers.
C. The Asian herbivore takes longer to complete development in the elevated chambers, but has very few natural enemies due to its foreign origin.
D. The Asian herbivore does not take longer to complete development in elevated CO2 chambers, so it is not subject to additional enemy attack.
Answer: C
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