Transcript LESSON2 Nature and value of biodiversity

Defining Biodiversity
What is the nature
and value of biodiversity?
Learning Objectives –
• To name the factors that influence biodiversity
• To be able to classify these factors into groups
• To consider which have greater impact upon
biodiversity
P100
Oxford
1. Answer this question and add 5 facts that evidence your thinking!!
2. Why are biomes named after plants and not animals?
Your starter for 10
• List 10 keywords from last lesson ie the
ones you were asked to learn
• Let’s see how well you do in today’s lotto
draw ….
Are you a biodiversity ‘millionaire’?
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ABIOTIC
PRODUCER
ENERGY FLOW
KEYSTONE SPECIES
CONSUMER
TROPHIC LEVEL
How many of these can you define?
Work with your partner!
What factors influence
(the distribution of) biodiversity?
What factors influence
(the distribution of) biodiversity?
1. Add to your mind-map as necessary
2. Can we colour code them into groups?
3. Which of these are the most important/determining factors?
This is the main or
‘limiting factor’ as it
determines the limits
within which species exist
Big
impact
if focus
on one
species
The bigger
the area
the more
space
for
species
The bigger the population, the more
in competition we are for space & resources
Often monoculture
Endemism vs. Cosmopolitan Distribution
Endemism is the ecological state of being
unique to a particular location, such as a
specific island, habitat type or nation. To
be endemic to a place or area means that
it is found only in that part of the world
and nowhere else. For example, many
species of lemur are endemic to the island
of Madagascar.
Cosmopolitan Distribution
is the ecological state of
being found almost
anywhere around the world.
Over to you…..
Add the words endemic and
cosmopolitan to your glossary then
List 10 species of each type
P101
Oxford
habitat
net primary production
(grams per square metre
per year)
Forests
Tropical
1,800
Temperate
1,250
Boreal
800
Other terrestrial
habitats
Swamp and marsh
2,500
Savanna
700
Cultivated land
650
Desert scrub
70
Temperate grassland
500
Tundra and alpine
140
Is there a
correlation
between
distance from
the Equator
and productivity
(NPP)?
Make links to
prior learning
Climate extreme places eg ? have
lower biodiversity & productivity
due to limiting factors eg ???
Lower latitudes eg nr Equator
warmer, more humid;
Ideal conditions for breakdown of
decaying matter (nutrient cycling)
FACTORS AFFECTING BIODIVERSITY - Answers
Altitudinal Range
Habitat
Destruction
Succession
History and Age
Size of an Area
Effective
Conservation
and
Restoration
Disturbance
Productivity
Interaction
between species
Habitat
Architecture
Isolation
Dispersal and Colonisation
Habitat
Heterogeneity
Hetero = different
Homo = same
Now sort the factors into categories:
GLOBAL and CONTINENTAL
FACTORS
REGIONAL FACTORS
LOCAL FACTORS
HUMAN FACTORS
Global/
Continental
Regional
Local
Human
Size of An Area
Productivity
Succession
Habitat
Destruction
History and Age
Habitat
Architecture
Interaction
between species
Effective
Conservation and
Restoration
Isolation
Habitat
Heterogenity
Disturbance
Altitudinal Range
Dispersal and
Colonisation
Learning Review
• Can I…..
name the factors that influence biodiversity?
classify these factors into groups?
state which have greater impact upon biodiversity?