Answer : True.
Explanation : The energy which we get after consumption of food is utilized for performing metabolic processes in the consumers; Which reduces the efficiency of secondary productivity.
Many organisms perform various metabolic processes like catabolic or anabolic activities in the cells using the energy which is obtained from the food that an organism consumes. The food nutrients are broken down into many smaller compounds.
This process reduces the secondary efficiency which includes; generation of biomass of consumers as organisms in a trophic system.
Bacteria, archaea, fungi, algae
Small sugars (monosaccharides and disaccharides) glucose fructose, sucrose etc
Amino acids
Conservation tillage is an agrarian management method that targets to lessen the rate of tillage operations in an effort to endorse positive economic and environmental benefits. These consists of a cut in carbon dioxide and greenhouse emissions, it lessen the dependence on farm machinery and equipment, and an overall decline in fuel and labor costs. Furthermore, this will lead to agricultural sustainability through the conservation tillage methods it shown to develop soil health, lessen run-off, and limit erosion.
Answer:
Hey there!
I believe that David's prediction would be: If the amount of pollutants in the atmosphere reached an amount unhealthy for the salamanders, then the salamander population would decrease.
Let me know if this helps :)