Transcript Environmental Science - McArthur's Media

Environmental Science
What do organisms
need in order to survive?
The Big 4 needed for survival
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Water
Light
Temperature
Nutrients or food
Sustaining Life
• Each type of organism needs certain kinds and
quantities of nutrients to survive (to live).
• If only one key nutrient is missing, it will die.
• Even if one key nutrient is minimal (low), it’s
growth can be stunted.
Food “Web”
• What do you know?
Food “chain” or Web
• First the producers –
– Made up mostly of plants (also some bacteria) – they
get their energy from the sun and simple chemicals.
• Then consumers - Which use energy from the green plants (and other
consumers)
• Last is the decomposers – Mainly bacteria and fungi (they break down complex
chemicals into simpler ones that can be used again by
the producers)
Range of tolerance
• Organisms can survive only within their range
of tolerance for a particular environmental
factor.
• Outside of their range of tolerance they fail to
reproduce or grown.
• There is a maximum and minimum limit (for
example, if it is too hot or too cold a plant or
animal will die).
Environment
• Environment the objects (things), organisms,
and conditions that exert an influence on an
organism.
• Environmental factors – any one part of the
environment (either living or non-living).
Brine shrimp
• http://www.youtube.com/watch?v=k0gxZELt-30&feature=fvwp&NR=1
• microscopic larvae
• microscopic adult
• brine shrimp eating algea
• brine shrimp butterfly movement
• deans “sea monkeys”
• more dean's "happy sea monkeys"