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Habitat -

An area where an organism lives.

Niche -

The role or position that an organism has in its environment.
A niche may be described in terms of requirements for living space, temperature, moisture or in terms of appropriate mating or reproduction.

Predation -

The act of one organism consuming another organism for food.

Symbiosis -

The close relationship that exists when two or more species live together.

Mutualism -

The relationship between two or more organisms that live closely together and benefit from each other.

Commensalism -

Is a relationship in which one organism benefits and the other organism is neither helped nor harmed.

Parasitism -

A symbiotic relationship in which one organism benefits at the expense of another organism.

Autotroph -

An organism that collects energy from sunlight or inorganic substances to produce food.

Hetertotroph -

An organism that gets its energy requirements by consuming other organisms.

Herbivore -

A heterotroph that eats only plants. Examples are: a cow, rabbit or grasshopper.

Carnivores -

Heterotrophs that prey on other hetertrophs, such as wolves, lions and lynxes.

What are the 2 types of Succession?

1. Primary succession
2. Secondary succession

Primary succession

after volcano, first life, lichen (fungi, algae)

Secondary succession

life was there, huge natural disaster wipes out life, life returns


rain, snow, sleet (water)


water goes "up" from ocean, streams


if the water goes up from plant life

Carrying capacity

maximum population an area can sustain


one party benefits other party unaffected


one party benefits, other party harmed


both parties benefit

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