669811
B4 - Its a
green world
- Ecology in the local
environment
- Organisms can be
collected using a variety
of methods, including:
Nets, Pooters, Pitfall
traps, Quadrats
- capture recapture
- The numbers of marked and
unmarked animals caught in the
traps are recorded. The
population size is estimated
using this formula:
- Population size = Number in
first sample x number in
second sample / number in
second sample previously
marked
- Population size = Number in
first sample x number in
second sample / number in
second sample previously
marked
- There is no death,
immigration or emigration
The sampling methods used
are identical The marking
has not affected the survival
rate of the animals
- The numbers of marked and
unmarked animals caught in the
traps are recorded. The
population size is estimated
using this formula:
- Biodiversity Biodiversity is the
variety of different species living
in a habitat. The greater the
number of different species in a
habitat, the greater its
biodiversity.
- kite diagrams: The
distribution of
organisms in a
habitat is affected by
the presence of other
living organisms. It is
also affected by
abiotic factors
(physical factors)
such as availability of
light or water
- A gradual change
in the distribution
of species across
a habitat is called
zonation
- A gradual change
in the distribution
of species across
a habitat is called
zonation
- Organisms can be
collected using a variety
of methods, including:
Nets, Pooters, Pitfall
traps, Quadrats
- Photosynthesis
- Leaves and photosynthesis
- Diffusion and osmosis
- Transport in plants
- Plants need minerals
- Decay
- Farming
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