Notes for C4.2.16 Secondary production as accumulation of carbon compounds in biomass by heterotrophs - IB | RevisionDojo
C4.2.16 Secondary production as accumulation of carbon compounds in biomass by heterotrophs Notes
Secondary Production: Accumulation of Carbon Compounds in Biomass by Heterotrophs
Definition
Secondary production
Secondary production is the accumulation of carbon compounds in biomass by animals and other heterotrophs, which ingest food and build these compounds into proteins and other macromolecules.
Secondary production works through:
Ingestion: Carbon compounds like sugars and amino acids are ingested from food.
Assimilation: These compounds are used to build biomass (e.g., muscles, tissues).
Respiration Loss: Some carbon compounds are oxidized for energy, with carbon dioxide released as a byproduct.
Why Is Secondary Production Lower Than Primary Production?
Energy Loss: Cell respiration results in a loss of biomass at every trophic level.
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Questions
Recap questions
1 of 5
Question 1
Recap question
Two insect species consume the same amount of food and have identical assimilation efficiencies, but species X has twice the production efficiency of species Y. What must differ between them?
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What is the difference between primary production and secondary production?
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Note
Introduction to Secondary Production
Secondary production refers to the accumulation of carbon compounds in biomass by animals and other heterotrophs.
Unlike plants, which produce their own food through photosynthesis, heterotrophs obtain carbon compounds by consuming other organisms.
These carbon compounds are used to build essential macromolecules like proteins, lipids, and carbohydrates.
Think of secondary production as the process of building a house using bricks (carbon compounds) that you have to gather from elsewhere, rather than making your own bricks like plants do.
DefinitionHeterotrophsOrganisms that obtain their energy and carbon compounds by consuming other organisms, rather than producing their own food through photosynthesis.
AnalogyImagine a factory that assembles cars using parts imported from other factories. The cars represent the biomass, while the imported parts represent the carbon compounds obtained through consumption.
ExampleA lion gaining muscle mass by consuming a zebra is an example of secondary production, as the lion converts the zebra's biomass into its own.
NoteSecondary production is a crucial part of the food chain, as it transfers energy and nutrients from primary producers to higher trophic levels.
