Primary & Secondary Consumers | Discussion

Lab 1

1. Grass           Primary Producer

2. Spider         Secondary Consumer

3. Horses         Primary Consumer

4. Swifts (bird) Secondary Consumer

Question 1

Removing one of the identified species might alter the food web considerably because of the direct and indirect effects on the remained species in the food web. For example, removing grass means the lack of food for consumers, both primary and secondary. Removing primary consumer means the increased amount of food for secondary consumers. Removing secondary consumers means the increased amount of food for primary consumers.

Question 2

Some organisms will benefit from extinction, while others will have problems because of the lack of food and other adverse factors. In this case scenario, secondary consumers (spiders and birds) will benefit from extinction of primary consumers (horses). The feeding of each organism depends on the functioning of the food web. Both primary and secondary consumers need feeding to support their living.  

Question 3

Some organisms will be impacted negatively by the extinction of grass because of the lack of food. These organisms include primary consumers. Horses are primary consumers because grass is the key food for them. In other words, horses are the animals which are fed directly on plants. They are called herbivores. Birds and spiders are secondary consumers of grass in the chain of food. They can eat other small invertebrates.

Question 4

The removal of a species will lead to the increased competition between species in the food web because of the decreased food available to other species. Some species will dominate the food web, while others will face negative consequences caused by the food chain’s modification (Withgott & Laposata). Competition between species may affect ecology and evolution. The lack of food resources is the major reason of the increased competition between species in the food web. The population of species can be limited as there is no sufficient food. For example, the removal of grass will lead to the increased competition between spiders and birds. Birds will eat spiders instead of grass in order to survive, while spiders will be unable to eat birds. This fact means that this type of competition could negatively impact those species which lose and fail to reproduce.

Works Cited

Withgott, Jay H. & Laposata, Matthew. Essential Environment: The Science Behind the Stories. Benjamin-Cummings Publishing Company, 2014. Print.

The terms offer and acceptance. (2016, May 17). Retrieved from

[Accessed: October 27, 2021]

"The terms offer and acceptance." freeessays.club, 17 May 2016.

[Accessed: October 27, 2021]

freeessays.club (2016) The terms offer and acceptance [Online].
Available at:

[Accessed: October 27, 2021]

"The terms offer and acceptance." freeessays.club, 17 May 2016

[Accessed: October 27, 2021]

"The terms offer and acceptance." freeessays.club, 17 May 2016

[Accessed: October 27, 2021]

"The terms offer and acceptance." freeessays.club, 17 May 2016

[Accessed: October 27, 2021]

"The terms offer and acceptance." freeessays.club, 17 May 2016

[Accessed: October 27, 2021]
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