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Students need to be able to differentiate between abiotic and biotic factors and understand which of these affect arthropods, such as temperature, nutrients, predators, host plant, etc.
We focused the discussion on aphids and had each student list all abiotic and biotic factors that may influence the population size of aphids.
Class Three: Effects of Abiotic & Biotic Factors on Aphids
A paired t-test (SAS 2008) was used to determine differences between the leaf area damaged by cohorts exposed to biotic plus abiotic factors and the area damaged by cohorts on leaves where biotic factors were excluded.
During spring 2008, the effect of biotic factors observed for the eggs and all instars fluctuated from 7.