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Biodiversity
- Studying
biodiversity
- Biodiversity
is the variety
of organisms
- Species - a group of similar
organisms able to reproduce
to give fertile offspring
- Habitat - the area inhabited by a
species. It includes the physical
factors like temp and soil and the
living factors like food or predetors
- Species - a group of similar
organisms able to reproduce
to give fertile offspring
- Can be
considered at
different levels
- Habitat diversity is the
number of different
habitats in an area
- Species diversity is
the number and
abundance of the
number of different
species in an area
- Genetic diversity is
the variation of alleles
within a species
- Habitat diversity is the
number of different
habitats in an area
- Sampling
- Use a quadrat,
sweepnet, pitfall trap or a
net. The sample has to
be random
- Use a quadrat,
sweepnet, pitfall trap or a
net. The sample has to
be random
- Species richness
and evenness
- Simpsons
Index of
Diversity
- Takes into account
species richness and
evenness. The value is
always between 0-1.
The higher the number
the more diverse it is
- Takes into account
species richness and
evenness. The value is
always between 0-1.
The higher the number
the more diverse it is
- Species richness is the
number of different
species in an area. The
higher the number of
species the greater the
species richness.
- Species evenness is a measure of
the relative abundance of each
species in an area. The more similar
the population size of each species
the greater the species evenness.
- Species evenness is a measure of
the relative abundance of each
species in an area. The more similar
the population size of each species
the greater the species evenness.
- Simpsons
Index of
Diversity
- Biodiversity
is the variety
of organisms
- Global
biodiversity
- Current estimates of
biodiversity vary
- There are named
species but different
opinion about the
classification of them
- Unnamed
species and
some are
undiscovered
- Different scientists
have different
researching
techniques
- Biodiversity varies in
part of the world i.e
rainforests are largely
unexplored
- There are named
species but different
opinion about the
classification of them
- Climate affects
biodiversity, spread of
diseases and
agricultural patterns
- Most species need a certain
temperature to live. An area
may become
uninhabitable.Species may
migrate which decrease
biodiversity in that area.
Species may become extinct
- Warmer and wetter condition
increases fungal diseases. The
ranges of some insects that
carry diseases might become
greater
- Land that was too dry and
become wet will increase
crops to grow. Increase in
temp may cause crop to die
and disrupt food chains.
- Most species need a certain
temperature to live. An area
may become
uninhabitable.Species may
migrate which decrease
biodiversity in that area.
Species may become extinct
- Current estimates of
biodiversity vary
- Importance of
biodiverty
- Economic
- Food and drink, clothing,
drugs, fuels, industrial
materials (rubber, oil,
paper....)
- Food and drink, clothing,
drugs, fuels, industrial
materials (rubber, oil,
paper....)
- Ecological
- Disruption of food chains and
nutrient cycles, loss of habitats,
affect climate
- Disruption of food chains and
nutrient cycles, loss of habitats,
affect climate
- Ethical
- Organisms have the right to live,
moral responsibility to conserve
biodiversity, religious and spirtiual
reasons for conservation
- Organisms have the right to live,
moral responsibility to conserve
biodiversity, religious and spirtiual
reasons for conservation
- Aesthetic
- Attractive environment,
there will be more visitors
- Attractive environment,
there will be more visitors
- Agriculture
- Many species are a
source of food. New
varieties, protection
against disasters, pest
control and pollinators.
- Many species are a
source of food. New
varieties, protection
against disasters, pest
control and pollinators.
- Economic
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