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Abiotic factors
Non-living factors that affect the community
of organisms in a habitat.…read more

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· Plants are dependent on light for
· Seasonal light changes can also affect
reproductive patterns and many aspects of
human behaviour would be lost.…read more

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There is a range of temperatures within
which organisms can grow and
successfully reproduce. Above or below
that range reproduction doesn't occur
even if the organism survives.
· The environmental
temperature affects the
rate of enzyme-controlled
reactions in plants and
· Some animals have evolved
behaviours and
physiological features that
help them to control their
body temperature.…read more

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In water currents, organisms
have to flow with the current,
be strong swimmers or be
able to hang on tight and
resist the force of the water.
Wind and water currents
· Wind increases water and heat loss from the
body and adds to the environmental stress an
organism has to cope with.
· Fewer species can survive in prevailing winds.
· Currents are most damaging to populations
when the strength increases suddenly, e.g.
flooding.…read more

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The availability of water is affected
by several factors such as the
amount of precipitation, the rate of
evaporation and edaphic factors.
Water availability
· If water stress becomes too severe, the
organisms will die unless they have special
adaptations to help them survive and
· An increase in water availability can lead to a
huge change in a habitat and to a massive
increase in population size of some organisms.…read more

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