Abiotic biotic

Biotic & Abiotic Influences


Ecosystem: all the living organisms that share a region & their physical & chemical environment


Ecosystem: all the living organisms that share a region & their physical & chemical environment

e.g. pondforestoasis


Biotic Factors: living things, their remains, and features, such as nests, associated with their activities


Biotic Factors: living things, their remains, and features, such as nests, associated with their activities

Population: a group of individuals of the same speciesCommunity: all of the different species that interact in an ecosystem


Abiotic Factors: the non-living physical and chemical components of an ecosystem

e.g. rocksoxygenwatersunlight


Sustainable Ecosystem: an ecosystem that is maintained through natural processes


Sustainable Ecosystem: an ecosystem that is maintained through natural processes

Sustainability: the ability to maintain natural ecological conditions without interruption or weakening


Limiting Factor: any factor that restricts the size of a population

e.g. biotic: availability of foodabiotic: access to water


Tolerance Range: the abiotic conditions within which a species can survive


Tolerance Range: the abiotic conditions within which a species can survive

Key abiotic factors:-light availability-water availability-nutrient availability-temperature


Biotic Factors: interactions with other organisms influence a species' success

e.g. Competition: two individuals vying for the same resource



e.g. Competition: two individuals vying for the same resourcePredation: one individual feeds on another



e.g. Symbiosis: a close relationship betweentwo different species (3 types)Mutualism: two individuals benefitting each other



e.g. Symbiosis: a close relationship betweentwo different species (3 types)Parasitism: one individual lives on or in

and feeds on a host organism (one harmed and

one helped)



e.g. Symbiosis: a close relationship betweentwo different species (3 types)Commensalism: one individual benefits & the other neither benefits nor is harmed


Carrying Capacity: the maximum population size of a particular species that a given ecosystem can sustain

-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



sustainablepopulation



Is humanpopulationgrowthsustainable?

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Abiotic biotic