Powerpoint Tenth class

8/18/2019 Powerpoint Tenth class

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Biotic & Abiotic Influences


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Ecosystem: all the living organisms that share a

region & their physical & chemical environment


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Ecosystem: all the living organisms that share a

region & their physical & chemical environmente.g. pond

forest

oasis


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Biotic Factors: living things, their remains, and

features, such as nests, associated with theiractivities


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Biotic Factors: living things, their remains, and

features, such as nests, associated with theiractivities

Population: a group of individuals of the same

species

Community: all of the different species that

interact in an ecosystem


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Sustainable Ecosystem: an ecosystem that is

maintained through natural processes


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Sustainable Ecosystem: an ecosystem that is

maintained through natural processesSustainability: the ability to maintain natural

ecological conditions without interruption or

weakening


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Limiting Factor: any factor that restricts the size

of a populatione.g. biotic: availability of food

abiotic: access to water


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Tolerance Range: the abiotic conditions within

which a species can survive


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Tolerance Range: the abiotic conditions within

which a species can surviveey abiotic factors:

-light availability

-water availability

-nutrient availability

-temperature


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Biotic Factors: interactions with other organisms

influence a species' successe.g. Competition: two individuals vying for the

same resource


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same resource

Pre!ation: one individual feeds on

another


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same resource


another

"utualism: two individuals benefitting

each other


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same resource


another


each other

Parasitism: one individual lives on or inand feeds on a host organism


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same resource


another


each other

Parasitism: one individual lives on or inand feeds on a host organism

Commensalism: one individual benefits

& the other neither benefits nor is harmed


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Carrying Capacity: the maximum population size

of a particular species that a given ecosystem cansustain

-carrying capacity is set by the influences of all

the biotic and abiotic factors over a long period

of time

-sustainable populations live at or below their

carrying capacity


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sustainable

population


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s human

population

growth

sustainable!

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