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Terrestrial Food Chains

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Jacklyn Protz

on 10 February 2014

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Transcript of Terrestrial Food Chains

Terrestrial Food Webs and Chains
A model showing all possible feeding relationships that could exist within an area. A food web is essentially interacting food chains.

The 10% Rule
The 10 % Rule of Energy is that 90 % of all energy is lost as heat by metabolism of that organism; 10 % of the energy is passed on to next trophic level each time.
What is it?
A Terrestrial Food Chain is the order in which organisms on land habitats, such deserts, grasslands, and forests, consume and or produce food/energy.

Food Chains and Webs usually start with plants because they are producers. Then plants are eaten by another organism and then it repeats and continues.

Primary Carnivores
Secondary Carnivores
For example:
10 joules of E (Snake) – END HERE
100 joules of E (Mouse)
1000 joules of E (Grasshopper)
10,000 joules of E (Grass/flower… producers) – START HERE

Another Example:

Terrestrial Food Web
Terrestrial Food Chain
The Energy: What about it?
The energy flow of a terrestrial food web or chain always goes up: this is a result of the predation and consumption of organisms.
It is estimated that a tiger eats about one deer-sized animal each week.

A cape vulture weighing, on average, 20 lb eats about 6% of its body weight per day.

A non-breeding, black-shouldered kite weighing, on average, .55 lbs eats about 20% of its body weight per day.

The average worm eats about 1 1/2 lbs per week.
Examples of Necessary Consumption
The amount of intake is proportional to the amount of energy used on a daily basis
What would happen if a disease entered the food chain?
If a disease entered a food chain it would start from bottom of the food chain (Producers) then the primary consumers would eat the producer which contains the disease and it would then transfer the disease to the primary consumer which would also reduce the population. The process would continue till the disease has made it all the way to the perdator and the population of the predator would go down.
Tabetha, Meredith, Jacklyn & Axel
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