Which of the following is the first trophic level in the food chain?

By: Prof. Dr. Fazal Rehman | Last updated: February 3, 2024

Question:  Which of the following is the first trophic level in the food chain?

A  Producers

B  Herbivores

C Carnivores

D Omnivores

Answer:   Producers

 

Trophic Level in food chain                 Description              Examples
Zeroth Trophic Level  or Abiotic ·        This level includes non-living components of the ecosystem that provide the foundation for life. ·        Sunlight as an energy source

·        Nutrients in the soil or water

·        Physical factors like temperature and pH

First Trophic Level (Producers or Autotrophs) ·        Organisms that produce their own food through photosynthesis or chemosynthesis.

·        They are usually at the base of the food chain.

·        Plants (e.g., grass, trees)

·        Algae in aquatic ecosystems

·        Some bacteria and archaea

Primary Consumers (Herbivores) ·        Organisms that consume producers as their primary food source.

·        They are herbivores.

·        Deer

·        Rabbits

·        Grazing insects (e.g., grasshoppers)

Secondary Consumers (Carnivores) ·        Organisms that feed on primary consumers or other herbivores. They are carnivores. ·        Wolves (preying on herbivores like deer)

·        Snakes (eating herbivorous rodents)

·        Hawks (feeding on herbivorous birds)

Tertiary Consumers ·        Organisms that consume secondary consumers.

·        They are often top-level predators.

·        Lions (preying on carnivorous mammals like hyenas)

·        Eagles (feeding on carnivorous birds) Humans (when they consume meat from herbivorous or carnivorous animals)

Detritivores and Decomposers ·        Organisms that feed on dead organic matter and help in the process of decomposition.

·        They play a crucial role in recycling nutrients.

·        Earthworms (detritivores)

·        Bacteria and fungi (decomposers)

·        Vultures (feeding on carcasses)

Scavengers ·        Organisms that primarily feed on animal carcasses, but they do not break down the dead matter as extensively as decomposers. ·        Hyenas

·        Buzzards

·        Crows

 

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