Question

1. name three things that dr. power did to help study the main producers and consumers in a river ecosystem.
2. fill in the table below with the following: the same in sunny and shady pools and higher in sunny pools.

standing crop of algae

productivity of algae

number of catfish

Explanation:

For question 9, possible things Dr. Power could do include sampling organisms, measuring environmental factors, and observing feeding - relationships. For question 10, algae productivity and standing crop are likely higher in sunny pools due to more light for photosynthesis. Catfish numbers may vary based on food availability from algae and other factors, but generally could be higher in sunny pools with more algae as a food source.

Answer:

1. Sampled organisms; Measured environmental factors; Observed feeding - relationships
2. Standing Crop of Algae: Higher in sunny pools

Productivity of Algae: Higher in sunny pools
Number of Catfish: Higher in sunny pools