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biology paper 2
Ecology
Biotic and Abiotic Factors
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Created by
Harvey Metcalfe
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Cards (21)
What are the two types of factors that affect a community?
Biotic
and
abiotic
factors
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What are biotic factors?
Living
parts of an environment
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What are abiotic factors?
Nonliving parts of an
environment
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What are the four different biotic factors mentioned?
Availability of food
Arrival of a new
predator
Competition between
species
New
pathogens
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How does the availability of food affect a community?
If food availability falls,
organism
numbers fall
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What effect does a new predator have on prey species?
It can cause the prey
population
to fall
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How can competition between species affect populations?
Outcompeted species may become
extinct
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What happens if a new pathogen emerges?
It can wipe out a population of a
species
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What are the seven different abiotic factors mentioned?
Light intensity
Temperature
Water
pH and mineral content of
soil
Wind intensity and direction
Carbon dioxide
Oxygen
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How does light intensity affect plants?
Low light reduces
photosynthesis
rate
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What happens if the temperature of an environment changes?
Species
distribution may change
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Why is water an important abiotic factor?
Both plants and animals need water to
survive
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How does soil pH affect plants?
Many plants can't grow in
extreme
pH
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What mineral is essential for plants to make proteins?
Nitrate
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How can wind intensity affect plants?
Strong winds can cause
water loss
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Why is carbon dioxide important for plants?
It is needed for
photosynthesis
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What happens if carbon dioxide levels fall?
The rate of
photosynthesis
can decrease
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Why is oxygen important for organisms?
It is needed for
aerobic respiration
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How can dissolved oxygen levels in water change?
They can fall on
hot days
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What can happen to aquatic organisms if dissolved oxygen levels fall?
It can be
harmful
to aquatic organisms
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Where can students find questions on biotic and abiotic factors?
In the
vision
workbook linked in the video
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