A local ecosystem

A local ecosystem

  • Submitted By: stepturr
  • Date Submitted: 06/13/2015 8:26 PM
  • Category: Science
  • Words: 983
  • Page: 4

The distribution, diversity and numbers of plants and animals in
ecosystems are determined by biotic and abiotic factors

A Local Ecosystem

Abiotic Characteristics
Abiotic factors include non-living
components of the environment

●Light intensity

Abiotic factors of aquatic and
terrestrial environments
Abiotic Characteristic

Aquatic environment

Terrestrial environment

Availability of oxygen
(oxygen is needed for
aerobic respiration)

Oxygen is less available in Oxygen is more available
water than in air
making up approximately
20% of atmosphere

Temperature variation

Depends on depth of
water and latitude. Large
bodies of water have
relatively small variation in
temperature. Small bodies
of water heat up and cool
more quickly

Pressure variation

Water pressure increases Air pressure decreases
with depth of water
with altitude

Light penetration

Depends on depth

Depends on latitude and
altitude. Large variations in
temperature can occur –
greater than aquatic

Is easily available. Can be
limited by other vegetation
or topographic features

Factors affecting distrbution and
Availability of food source
●Abundance and range of predators
●Competitors for food sources or resources
●Climate conditions (temperature + rainfall)

Photosynthesis and
Photosynthesis is the chemical process
used by chlorophyll-containing cells to
convert inorganic raw materials into organic
compounds using light energy
●Respiration is a series of chemical reactions
which releases energy from complex

Glucose + oxygen
carbon dioxide + water
●This process does not occur in one step. There are about
50 different stages, each catalysed by a different enzyme.

Roles of photosynthesis and
respiration in ecosystems

Formation of glucose enables the conversion of...

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