A) Explain how each of the following three ecological disruptions would affect the number and size of trophic levels in an ecosystem: i. Decrease in the available sunlight

ii. Increase in the number of producers

iii. Increase in the availability of a resource that was limiting the herbivore population size

B) Describe the concept of trophic efficiency.

measuring light intensity

light meters can be used to measure light intensity. the meter is held at the soil surface and pointed in the direction of the maximum light intensity, and then the meter is read.

errors can be made when measuring light intensity by accidentally shading the light meter. the reliability of the results can be checked by taking many samples.