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Food Chains

I love food

Arushi Joshi

on 17 February 2015

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Transcript of Food Chains

Food Chains

What would happen if omnivores,carnivores, and herbivores
were removed from existence,
and how would it affect the food chain?

What's a food chain?
Food chains are diagrams we use to show how energy and nutrients pass from one organism to another in an ecosystem. The food chain also shows the different relationships between species. Plants usually begin a food chain because it can make its own food. They get this "food", from the sun, with a process called photosynthesis. Organisms that can make their own food are called producers. Consumers are animals that eat producers or other animals. The animal that eats the producer is called the primary consumer. The animal that eats the primary consumer is called a secondary consumer. The animal that eats the secondary consumer is called a third order consumer and so on to fourth, fifth, sixth etc.
We hope you enjoy our Prezi!
How do humans effect Herbivores,carnivores and omnivores?
Humans would still be the dominate species on Earth. If humans were the only omnivores there would be a lot less animals on Earth. The food chain would change a lot, instead of omnivores eating plants and herbivores too, it is humans and carnivores eating herbivores and only humans and herbivores eat plants. That means the world would change but not that much. So if omnivores became extinct except for humans it wouldn't really affect the world.
What would happen if all species were omnivores,carnivores or herbivores?
If all species were omnivores, then all animals would eat some plants, some animals. However almost every animal alive would likely be a cannibal. I believe that, however, animals would eventually evolve into the 3 main groups we have now.

In terms of consumption, humans mainly eat herbivores for the meat section of their diet (chickens,cows,pigs etc.) so they are commonly raised on farms for good profit. Humans sometimes hunt them for recreation an example of a common hunted herbivore is the deer. A way we support saving and conserving herbivores is by building wildlife refuges. However sometimes one of us humans captures or hunts an animal living in the wildlife refuge this is known as poaching and it is strictly illegal. A simple way some of us contribute to conserving animals is by being vegetarian. Humans can have positive effects on the herbivores or negative effects.
What would happen if humans were the only
Why are omnivores,carnivores, AND herbivores strict on their eating habits?
Carnivores can only eat meat or can only consume small amounts of vegetation because they can not digest vegetation that well. They can not digest the tough cellulose (an organic compound) that are found in plants because they have short digestive systems. If they can not digest the plants then they will not have enough energy. They also can not chew plants well enough because of how their teeth are shaped and arranged.
Omnivores don't have very strict eating habits because they can eat both plants and meat. Some omnivores may only want to eat only meat or plants. An example of this are vegetarians (people who don’t eat meat).

Herbivores can only eat plants because this is the only thing that can give them energy. They need a lot of energy every day. Herbivores like cows eat all day to get enough energy. Unlike carnivores, herbivores have teeth that are adapted to grinding plant tissues and does not have teeth that can rip off the meat so herbivores usually don’t eat meat.

If all animals were herbivores plants would be the only things ever eaten and plants would have to genetically modify themselves to reproduce much more efficiently. Eventually, the consumption rate would surpass the reproduction rate and all plants would die and therefore, so would all animals. Earth would be in ruin.

Nothing would eat plants and therefore the Sun’s energy could not be passed on to all animals meaning that they would all perish. There would also be a surplus of plants.

Humans sometimes keep larger carnivores such as the lion, the tiger and the cheetah in zoos because they are often appealing to young audiences which is that kind of audience zoos often target. Taking one from is habitat can create minor problems from its home like there might be an increase of herbivores which could lead to problems in the future if not handled properly by nature. A possible problem is overpopulation.
I would say that we do not have many actual effects on omnivores that we don't effect herbivores or carnivores with. One problem that involves omnivores (herbivores and carnivores) is deforestation and destroying the habitats of them. One of the best positive effect we do have in the one I mentioned earlier, wildlife refuges which help the herbivores and carnivores too.




If all carnivores were removed, the prey would have a higher
life expectancy and so there would be larger numbers of prey as there was nothing to eat them. this boost to population would mean there would be less food for the individuals and the numbers would drop as more animals are competing for less food.

If herbivores were eliminated from life then the carnivores would die out.They would have to feast upon each other and out of necessity would be eating more than are born. Several species of plants would die out due to lack of dispersal since several have symbiotic relationships with animals that eat their fruits. It would cause an evolutionary blockage where only those plants that weren't dependant upon animals for reproduction would continue. The last time an ecosystem existed without herbivores was at the very beginnings of life on earth. Because plants would no longer be attracting animals/insects, colors would no longer matter fruits, would get smaller (if they survived). Soil quality would drop since there would be no mobile fertilizers roaming around (animals poop is fertilizer). Since man is an omnivore they would technically be removed from the equation as well.

I think that if omnivores were removed from the ecosystem very little would change comparing to the removal of carnivores and herbivores. The carnivores mainly eat herbivores so little will happen to the carnivores' diets. The plant life won't change to much either because of the population of herbivores. I like to think of this a a "board". What I mean is think of a balanced board that's on a stable fulcrum and in order for in to stay up it has to be balanced. On the right we have herbivores, in the middle omnivores and on the left carnivores. If you remove from the right or left it's imbalanced and there is a problem, if you take from the middle though, it is still balanced.
*cough cough* swan
Our main question:
How do variables
change the food chain?
Green circle= Carnivores
Beige circle= Omnivores
Blue circle= Herbivores
Thanks for watching!
Here's a quote about food chains, that's very relateable :)
by: Stas
Full transcript