Larry Halbert

Larry's food web

Food Web

The trophic level of an organism is the position it occupies in a food chain. The word trophic derives from the Greek referring to food or feeding. A food chain represents a succession of organisms that eat another organism and are, in turn, eaten themselves. The number of steps an organism is from the start of the chain is a measure of its trophic level. Food chains start at trophic level 1 with primary producers such as plants, move to herbivores at level 2,predators at level 3 and typically finish with carnivores or apex predators at level 4 or 5. The path along the chain can form either a one-way flow or a food "web". Ecological communities with higher biodiversity form more complex trophic paths.

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Mutalism

the doctrine that mutual dependence is necessary to social well-being.
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commensalism

an association between two organisms in which one benefits and the other derives neither benefit nor harm.
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parasitism

Parasitism is a relationship between two things in which one of them (the parasite) benefits from or lives off of the other, like fleas on your dog. Parasitism and its root, parasite, come from para-, meaning"beside" or "next to," and sito, meaning "bread or food."

humans impacting on earth

positive


-humans help the plants, and we help fertilizer the earth ground.

- we help keep the community clean by picking up the trash.


negative


- we don't help the earth by not polluting the right way.

- we don't look in to the population of the animals in the world today so we might be killing the last species.