Question

1 : How do you calculate the adjusted amount of energy that is available to organisms that are one trophic level above producers?
2 : Methylmercury biomagnifies in an ecosystem, meaning its concentration __________ as it moves through each higher trophic level


3 : Scientists are looking to determine the primary productivity of a lake by analyzing its oxygen net primary productivity. How are scientists able to measure how much oxygen is used during a plant’s cellular respiration processes?


4 : Energy transfer is inefficient between trophic levels because


5 : Primary productivity is defined as

Answer 1

Answer:

1. 10% of the energy at lower trophic level

2. Methylmercury biomagnifies in an ecosystem, meaning its concentration increases  as it moves through each higher trophic level

3. Scientists can measure oxygen used during a plant’s cellular respiration by measuring dissolved oxygen in water

4. Energy transfer is inefficient between trophic levels because 90% energy is retained at each trophic level

5. Primary productivity is defined as rate at which energy is transformed into organic matter.

Explanation:

1. The energy transferred from lower tropic level to its next trophic level is equal to 10% of the total energy at the lower level.

2. increases

3. By measuring dissolved oxygen in water after every 24 hours. Reduced DO  value from the prior reading indicate the amount of oxygen used by plants

4. Because nearly 90% of energy is retained at each trophic level to carry out cellular metabolic activities.

5. It is the rate at which energy is transformed into organic matter.