Explanation:
Secondary productivity is the rate of formation of new organic matter by the consumers in an ecosystem. It is the amount of biomass produced by the heterotrophic organisms from the organic matter they consume. In other words, it is the rate at which the consumers convert the organic matter they eat into new biomass.

Factors affecting secondary productivity:
The secondary productivity of an ecosystem depends on various factors such as:

1. Availability of food: The availability of food resources affects the secondary productivity of consumers. If the food is scarce, the consumers will have less energy to convert into biomass, resulting in lower productivity.

2. Nutrient availability: The availability of nutrients such as nitrogen and phosphorus affects the growth and reproduction of consumers, which in turn affects their productivity.

3. Temperature: Temperature affects the metabolic rate of the consumers, which in turn affects their productivity. Higher temperatures generally result in higher productivity.

4. Predation: The presence of predators affects the behavior of the consumers, which in turn affects their productivity.

5. Competition: The presence of competing species affects the availability of food resources, which in turn affects the productivity of the consumers.

Importance of secondary productivity:
Secondary productivity is an important measure of the energy flow in an ecosystem. It provides information about the efficiency of energy transfer from the producers to the consumers. It also helps in understanding the food web dynamics and the role of consumers in maintaining the balance of the ecosystem.

Conclusion:
In conclusion, secondary productivity is the rate of formation of new organic matter by the consumers in an ecosystem. It is influenced by various factors such as food availability, nutrient availability, temperature, predation, and competition. It is an important measure of energy flow in an ecosystem and provides insights into the food web dynamics and the role of consumers in maintaining the balance of the ecosystem.