Environmental Science

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Presentation transcript:

Environmental Science

What do organisms need in order to survive?

The Big 4 needed for survival 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 – Then consumers - 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"