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Introduction to Ecology

Unit 8 Western High School Biology
by

James Rissi

on 11 May 2011

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Transcript of Introduction to Ecology

Study of interactions between biotic & abiotic factors.
an introduction to ecology Chapter 3: The Biosphere an introduction to ecology Ecology = Study of interactions between biotic & abiotic factors.
Ecology can be studied at many different levels -Organism
-Population
-Community
-Ecosystem
-Biosphere From smallest to largest things we have studied this year:
-Atom
-Molecule
-Cell
-Tissue
-Organ
-Organ System
-Organism
-Population
-Community
-Ecosystem
-Biosphere The only life we are aware of is found in earth's biosphere Organism = one individual of a species Population = several living things of the same species in one area Community = Several populations
Ecosystem = All communities and their non-living surroundings. Biosphere = includes the earth's surface, 5 miles up, 5 miles down
-This is where all life in the universe (to the best of our knowledge) exists Asian Carp - Invasive Species sdf -Your life depends on it! Who cares about Ecology? -The raw materials for all things you use come from your surroundings. -Careful management of these surroundings makes good business sense -Careful management of these surroundings ensure the health and survival of humans -Save the humans! Who cares about Ecology? Jobs in ecology: -Research for any manufacturing corporation -DNR, Wildlife Management, Government Zoning and Planning -Agriculture (farming) -Bio-fuels -Forestry, Manufacturing, Public Relations(PR), The “Green” Economy Basic Ecology Terms and Concepts -Niche = What an animal does to survive. How it gets energy and CHONPS. -Competitive Exclusion Principle = Only one species fills one niche at a time. (If another species invades the niche, the more successful species kills off the less successful) Energy In the Biosphere -Energy moves in one direction from the sun, back out to space -Our atmosphere acts as a blanket. It traps heat for a short time and allows it to slowly leak back out to space.

-Some gasses are better blankets than others -Gasses that trap heat (insulate) are called green house gasses green house effect -The green house effect is good! It keeps you from freezing at night. -Excessive green house gas leads to climate change (Green House Effect Diagram on the Board... Know it for the test!!!) -Climate = average weather conditions of the planet -Small climate changes can have massive impact -Could this change be good for humans? -Could Climate Change be bad? -Wait a minute…: quick review -a niche is how an organism gets energy and matter. -We just talked about how energy moves through our biosphere and some of the issues ecologists worry about with energy flow. -You should now understand energy flow…... what’s next? Energy flows in a one way path: Sun - Earth - Back out to space The atoms most important to Biology Matter AKA ATOMS CHONPS = The CHONPS the earth is made of have always been here (came from the formation of the earth) CHONPS just gets cycled around and around in the biosphere. Matter moves in a cycle through the biosphere while energy is a one way path You are made of carbon atoms that were once part of a dinosaur Each atom moves from place to place in the atmosphere in predictable ways: -Carbon cycle
-Water Cycle
-Nitrogen Cycle (include N2 fixation)

-(Phosphorus and Sulfur have cycles too, but they are more complicated than 10th grade people need to know right now). Water Cycle Carbon Cycle NItrogen Cycle
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