Desertification-3 -...

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Unformatted text preview: The
consequences
of
desertification

 •  Ecological
 •  Socio-Economic

 ECOLOGICAL
CONSEQUENCES
OF
DESERTIFICATION
 soil
 Ecological
Effects
–
Soil
Resources 
  Changes
soil
quality

loss
of
soil
nutrients

  Changes
land
surface
characteristics

dry
  Reduces
the
agricultural
productivity
  Loss
of
ecosystem
diversity
 ECOLOGICAL
CONSEQUENCES
OF
DESERTIFICATION
 water
 Ecological
Effects
–Water
Resources
 
  Changes
water
quality
and
 quantity
  Less
rainfall
  Drought
  Loss
of
productivity

  Impairment
of
aquatic
 ecosystems
 ECOLOGICAL
CONSEQUENCES
OF
DESERTIFICATION
 Wildlife,
plants
and
people
 Ecological
Effects
–Wildlife,
Plants
and
People
  Reduction
in
 biodiversity
  Reduces
plant
 composition
and
 abundance
 ECOLOGICAL
CONSEQUENCES
OF
DESERTIFICATION
 climate
 Ecological
Effects
–
Climate 
  Changes
energy
balance
  E.g.
more
sunlight
&
temperature
  Changes
in
carbon,
hydrological
and
nutrient
cycles
  E.g.
Increase

carbon
dioxide
emission

 greenhouse
effect
  Changes
in
climate
patterns
  Changes
in
precipitation
  Increased/decreased
in
some
areas
 Example
of

 infant
mortality
rate
&
GNP
 DESERTIFICATION
 Global
implications
 Global
Implications

 1.
Armed
conflicts

 - e.g.
Darfur,
Sudan
 - Partially
over
religion
 - However,originated
with
land
disputes
 between
semi-nomadic
livestock
herders
 and
sedentary
farmers
 - nomadic
tribes
facing
drought
are
going
 after
the
territory
of
sedentary
farmers
 2.
Worldwide:
50
million
environmental
refugees 
 expected
by
year
2010
 - Half
are
from
sub-Saharan
Africa
 4.
12
million
from
Sertão,
Brazil,
migrated
to
 São
Paulo
as
a
consequence
of
drought
 5.
Dust
storms
from
deserts
in
China/Mongolia

 How
to
combat
desertification
?
 The
most

effective
ways
to
combat
 Desertification

 • Reduce
overgrazing
 • Reduce
deforestation
 • Increase
reforestation
 • Proper
agriculture
&
irrigation
practices
 • Restoring
soil
fertility

 • planting
trees
and
grasses

 • Etc.
 International
actions
 International
cooperation

 • Earth
Summit
in
Rio
de
Janeiro
 in
1992
 • Agenda
21

 •  a
plan
of
actions
to
 mitigate
environmental
 problems
(sustainable
 development)
 •  >178
countries
adopted
 •  Chapter
12
(talks
about
desertification)
 International
cooperation

 • UNCCD
=
only
legally
binding
universal
instrument
 (i.e.
a
treaty)
to
address
desertification

 • Established
as
a
result
of
the
Earth
Summit
 • Adopted
in
1994
and
entered
to
force
in
1996
 Video
 •  Desert
as
Laboratory
 –  Video
4831
(Library
West)
 •  To
know
…
 –  2
places:
Mexico
&
Kenya
 •  Know
where
these
2
countries
are
 –  Issues
 •  Environmental
issues
 •  Social
issues
 •  Ways
to
combat
desertification
 ...
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This note was uploaded on 11/14/2011 for the course GEA 2284 taught by Professor Annaszyniszewska during the Fall '11 term at University of Florida.

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