The document defines an ecosystem as all living organisms in a region and their physical and chemical environment. It discusses biotic factors as living things and their remains/features, and abiotic factors as non-living components like rocks, oxygen, and water. Biotic and abiotic influences, like availability of resources, temperature, and interactions between species, impact populations and determine an ecosystem's carrying capacity, or maximum sustainable population size.

1. Biotic & Abiotic Influences

2. Biotic & Abiotic Influences
Ecosystem: all the living organisms that share a
region & their physical & chemical environment

3. Biotic & Abiotic Influences
Ecosystem: all the living organisms that share a
region & their physical & chemical environment
e.g. pond
forest
oasis

4. Biotic & Abiotic Influences
Biotic Factors: living things, their remains, and
features, such as nests, associated with their
activities

5. Biotic & Abiotic Influences
Biotic Factors: living things, their remains, and
features, such as nests, associated with their
activities
Population: a group of individuals of the same
species
Community: all of the different species that
interact in an ecosystem

6. Biotic & Abiotic Influences
Abiotic Factors: the non-living physical and
chemical components of an ecosystem
e.g. rocks
oxygen
water
sunlight

7. Biotic & Abiotic Influences
Sustainable Ecosystem: an ecosystem that is
maintained through natural processes

8. Biotic & Abiotic Influences
Sustainable Ecosystem: an ecosystem that is
maintained through natural processes
Sustainability: the ability to maintain natural
ecological conditions without interruption or
weakening

9. Biotic & Abiotic Influences
Limiting Factor: any factor that restricts the size
of a population
e.g. biotic: availability of food
abiotic: access to water

10. Biotic & Abiotic Influences
Tolerance Range: the abiotic conditions within
which a species can survive

11. Biotic & Abiotic Influences
Tolerance Range: the abiotic conditions within
which a species can survive
Key abiotic factors:
-light availability
-water availability
-nutrient availability
-temperature

12. Biotic & Abiotic Influences
Biotic Factors: interactions with other organisms
influence a species' success
e.g. Competition: two individuals vying for the
same resource

13. Biotic & Abiotic Influences
Biotic Factors: interactions with other organisms
influence a species' success
e.g. Competition: two individuals vying for the
same resource
Predation: one individual feeds on
another

14. Biotic & Abiotic Influences
Biotic Factors: interactions with other organisms
influence a species' success
e.g. Symbiosis: a close relationship between
two different species (3 types)
Mutualism: two individuals benefitting
each other

15. Biotic & Abiotic Influences
Biotic Factors: interactions with other organisms
influence a species' success
e.g. Symbiosis: a close relationship between
two different species (3 types)
Parasitism: one individual lives on or in
and feeds on a host organism (one harmed and
one helped)

16. Biotic & Abiotic Influences
Biotic Factors: interactions with other organisms
influence a species' success
e.g. Symbiosis: a close relationship between
two different species (3 types)
Commensalism: one individual benefits
& the other neither benefits nor is harmed

17. Biotic & Abiotic Influences
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

18. Biotic & Abiotic Influences
Carrying Capacity: the maximum population size
of a particular species that a given ecosystem can
sustain
sustainable
population

19. Biotic & Abiotic Influences
Carrying Capacity: the maximum population size
of a particular species that a given ecosystem can
sustain
Is human
population
growth
sustainable?