Transcript Learning objectives

Starter
 You are given a statement
 Decide if it belongs to economic,
ecological or aesthetic reasons for
conservation of animal or plant species
 You will be called upon to explain to the
class so develop your explanation
Learning objectives
Outline the reasons for the conservation of
animal and plant species, with reference to
economic, ecological and aesthetic reasons
b) Discuss the concequences of global
warming on the biodiversity of plants and
animals, with reference to the changing
patterns of agriculture and spread of
disease
c) Explain the benefits for agriculture of
maintaining biodiversity of animal and plant
species
a)
Statements - economic
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Natural ecosystems provide food for human
populations
Natural ecosystems provide materials for human
populations
Natural ecosystems are also important in providing
clean water, soil formation, treating waste and
climate control
Old cultivated varieties and wild varieties of crop
plant may provide sources of genes and alleles for
improving our crops in the future
Old breeds of domesticated animals and their wild
relatives may be sources of genes and alleles to
improve those in the future
Statements - ecological
 Loss of species leads to an imbalance in
natural communities. (hints =
overgrazing, land degredation, erosion
and loss of biodiversity)
 Keystone species
Kelp forrests  sea urchins  sea otters
Humans hunting the keystone species, sea
otters
Statements - Aesthetic
 Conservation of natural wilderness
Medical
 Plants have complex metabolisms and produce a
wide range of chemicals which we have
incorporated into medicines
 70% of the plants we get drugs from are found in
tropical rainforests – why might this be a major
problem in the future?
 Why should we aim to conserve all and not just
the ones we know are useful?
 Micro-organisms may also be very useful in the
future in this way
Learning objectives

Outline the reasons for the conservation of
animal and plant species, with reference to
economic, ecological and aesthetic reasons
b) Discuss the concequences of global
warming on the biodiversity of plants and
animals, with reference to the changing
patterns of agriculture and spread of
disease
c) Explain the benefits for agriculture of
maintaining biodiversity of animal and plant
species
Agriculture
 Over the past 100 years what have
humans done to increase food
production?
 Human diet is limited in comparism to our
ancestors. 3 main staple foods?
 Wheat, maize and rice – what if disease
wiped these out?
 Selective breeding had reduced the
genetic biodiversity of these species of
plant, overall effect?
How can maintaining biodiversity
help?
 Retain the genetic information that we
may need to call on in the future
 We may need to use other plants to vary
the genomes of our crop plants,
increasing genetic variation which could
increase stability of the species
 By maintaining fish species we can now
hunt fish species that used to be less
desirable as the common species
populations have been negatively affected
by humans
Scenario
 Global warming
 Some areas become viable to grow crops
 Some areas loose their viability to grow
crops
 What can we do???
 GM foods
 Where do we get the required genes from?
Learning objectives

Outline the reasons for the conservation of
animal and plant species, with reference to
economic, ecological and aesthetic reasons
b) Discuss the concequences of global
warming on the biodiversity of plants and
animals, with reference to the changing
patterns of agriculture and spread of
disease
 Explain the benefits for agriculture of
maintaining biodiversity of animal and plant
species
Malaria and global warming
 Explain
 Increased areas that vectors for tropical
diseases can survive
(malaria, sleeping sickness, dengue fever,
yellow fever)
 What else could increase the areas that it
can live??
Examples I found
 Bird malaria outbreak in Hawaii
 Insect-bourne viral pathogen caused
distemper among lions in the Serengeti
National Park Tanzania
 Fungal pathogen of wheat, black stem rust
spread throughout East Africa, India, USA
and Australia. Where will it go next???
Learning objectives



Outline the reasons for the conservation of
animal and plant species, with reference to
economic, ecological and aesthetic reasons
Discuss the concequences of global
warming on the biodiversity of plants and
animals, with reference to the changing
patterns of agriculture and spread of
disease
Explain the benefits for agriculture of
maintaining biodiversity of animal and plant
species
Can you get your point across
 Page 243 Q2
 Have a go