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CH3041
ON-LINE LECTURE 8
BIOTA
• Bacteria existed in the oceans
3.8 billion years ago.
3.8 billion years ago.
• Classes
of Aquatic Biota :
autotrophic eg. algae, phytoplankton
autotrophic eg. algae, phytoplankton
- use solar
or chemical energy to fix
carbon - CO2
carbon - CO2
heterotrophic eg. bacteria ,
fish
- use organic
material from autotrophs
• If we ignore the
biota then we will predict
the chemistry of a water body incorrectly.
the chemistry of a water body incorrectly.
Physical parameters of H2O that effect biota:
Temperature - not
too high or low
Transparency - determines growth of algae
Turbulence -
transport, nutrients / waste
