1. S U P E R V I S O R : D R . S A H A R E L - S H A T O U R Y
B Y : N A J A T A B D E L R A H I M M O H A M M E D
Microbial Action On The
.Global Warming
2. CONTENTS
Global warming definition.
Greenhouse phenomena.
Greenhouse gases and their sources.
Causes and effects of global warming.
3. What is Global Warming?
Global warming refers to an average increase in
the earth’s temperature, which in turn causes
changes in climate.
4. Global warming phenomena
The planet is heating up fast.
Earth’s heat up Temperature rises.
It happens when greenhouse gases (CO2, NO2, CH4,
H2O) trap the heat and light from sun in earth’s atm.
which increases the temperature.
The heat can get through the atmosphere
but it can’t get out
6. Greenhouse Effect
Normally it is useful way to
make earth proper place to
live on.
Without it earth could be
freezing at night.
Greenhouse gases makes
earth somehow warm.
8. What are the causes of global warming?
Man-made causes Natural causes
9. Man-made causes
Automotive industry.
Oil companies.
Power plants.
Agri-business (Biofuel-deforestation).
Logging industry ( deforestation).
10. Natural Causes
Causes that are created by nature.
1. Release methane gas from the arctic tundra and
wet lands, methane is very dangerous gas to our
environment.
2. Fossil fuels digging up and release of methane and
letting it escape to the atmosphere.
14. Autotrophic Bacteria And Global Warming
1. Photosynthetic:
Sun light is the source of energy, produce its simple
organic compound through this application
15. Autotrophic Bacteria And Global Warming
Chemosynthetic :
They do not use energy from the sun to produce food.
Instead, they make food using energy from chemical
reactions, often combining hydrogen sulfide or methane
with oxygen.
16. Chemosynthetic
Organisms that use chemosynthesis live in extreme
environments, where the toxic chemicals needed for
oxidation are found.
For example, bacteria living in active volcanoes and
hot springs. oxidize sulfur to produce their own food.
17. Methane-Munching Microbes Hit Rock Bottom
These microbes don't need oxygen to survive, but rather
rely on sulfate ions present in the seawater for their
energy needs.
Their methane breathing system, the details of which still
remain unclear, involves single-celled microorganisms
dubbed "ANME" for "ANaerobic MEthanotrophs." ANME
work closely with bacteria to consume methane using
the ocean's sulfate.
Without this biological process, much of that methane
would enter the water column, and the escape rates into
the atmosphere would probably be quite a bit higher
18. Methane-Munching Microbes Hit Rock Bottom
The microbes, living in enormous rocks hundreds of
feet tall, eat about 80 to 90 percent of the world's
methane released through previously studied seeps,
or cracks in the ocean floor.
According to DNA analysis of rock samples, even
though the microbes consumed methane at a slower
rate than their sediment-dwelling cousins, there are
presumably so many more microbes in the rock than
in the dirt, its impact on global methane levels may
be more significant
Deep ocean floor
19. Methanogenic Bacteria
The methanogenic bacteria are a large and
diverse group that is united by three features:
1. They form large quantities of methane.
2. Strict anaerobes.
3. Members of the domain Archaea.
20. Methanogenic Bacteria
Methanogenic bacteria obtain their energy for
growth from substrate converted to methane.
The Major Substrates Are:
H2 + Co2 CH4
1 CH4 = 25 CO2
CH4 2H2O + CO2+Heat
Its effect as greenhouse gas:
burn
21. Soil microbes amplify global climate
change
Scientists have discovered how an invisible
menagerie of microbes in permafrost soils acts as
global drivers of Earth processes such as climate via
gas exchange between soils and the atmosphere.
These findings will help climate modelers more
accurately predict Earth's future climate.
25. Nutrient Levels
Open Ocean
• Un affected by
rivers , streams and
terrestrial run off
• Low nutrient levels
phosphorus,
nitrogen and silica.
Near ocean
• High influx of
nutrient
• High rates of
primary
production
26. Phytoplankton
The major source of organic matter and the source of
photosynthetic activity.
Floating in the photic zone
