Question

this food chain shows organisms in a freshwater ecosystem.
use the food chain to complete the text below.
if the population of european graylings increases, the population of alderfly nymphs will likely , and the population of great cormorants will likely .

Explanation:

Step1: Analyze the relationship between European grayling and alderfly nymph

European grayling eats alderfly nymph. If European grayling population increases, more alderfly nymphs will be eaten. So the population of alderfly nymphs will decrease.

Step2: Analyze the relationship between European grayling and great cormorant

Great cormorant eats European grayling. If European grayling population increases, there will be more food for great cormorants. So the population of great cormorants will increase.

Answer:

decrease; increase