20. Communities and Ecosystems

Which of the following is a reason that such a small fraction of the energy that reaches the Earth as solar radiation ends up at the top of the food chain?

Using the data in this table, calculate the: Net production efficiency of insects.

Which of the following statements is true?

Which of the following answers describes the production efficiency of an organism?

Using the data in this table, calculate the: Net production efficiency of the grass.

Due to biomagnification, there are certain species with a high concentration of heavy metals (e.g., mercury), leading to dietary advisories for vulnerable demographics (e.g., pregnant women and young children) to avoid these species. Given that these advisories are often most critical for species at the top of long marine food chains, which species would this advice most likely apply to?

Using the data in this table, calculate the: Trophic efficiency between insects and grass.

Which of the following statements about NPP & GPP is true?

True or false: Most of an ecosystem’s net primary productivity is ultimately used for the growth of primary consumers within the ecosystem.