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Ecology

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by

Robyn Witty

on 20 April 2010

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Transcript of Ecology

Ecology And NUH is the letter I use to spell Nutches,
Who live in small caves, known as Niches, for hutches.
These Nutches have troubles, the biggest of which is
The fact there are many more Nutches than Niches.
Each Nutch in a Nich knows that some other Nutch
Would like to move into his Nich very much.
So each Nutch in a Nich has to watch that small Nich
Or Nutches who haven't got Niches will snitch.

-On Beyond Zebra (1955)
Dr. Seuss
Scientists study ecology
to get information that is
necessary to
understand and
resolve many of
the environmental
and ecological
issues that
confront
us.
They look at:
environment
ecosystem
habitat
niche
populations
species
community
Symbiosis:
Commensalism: one member benefits and the other is not harmed

Mutualism: two species live together and both benefit

Parasitism: one member benefits and the other is harmed
Trophic Levels Primary producers: organisms are autotrophs

Consumers: organisms are heterotrophs (herbivore,
carnivores, and omnivores)

Decomposers
Energy cannot be recycled thus it flows one way through primary producers to consumers to decomposers
The greater the
number of trophic
levels between consumers and primary producers the smaller the amount of energy that is available to the consumers compared to the energy originally captured by the primary producers Energy
Decreases
Essential for life’s processes (ultimate source of energy is the sun)
Full transcript