lesson 1 - teachengineering · 2016-04-16 · ecology study of living and nonliving parts of the...
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Lesson 1
Introduction to the challenge
question
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Author’s own picture Tucson, AZ
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A Saguaro Cactus Authors’ own
picture
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Lesson 2
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“In the end we will conserve only what we love, we will love only what we understand, we will understand only
what we are taught.” -Baba Gioum
Authors’ own picture, Franklin, TN sunrise
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Ecology
Study of living and nonliving parts of the environment and how they affect organisms
Ecology is only one aspect of biology but all LIFE depends on a healthy environment, food resources and water.
Man’s actions must protect these resources against pollution and depletion.
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Nonliving Things
Matter Energy
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Living Things
Bacteria, Protozoans, Fungi
Plants Animals
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WEB OF LIFE
All life is interconnected
INTERDEPENDENT
Not
INDEPENDENT
Destroyed links = Unhealthy, less stable earth
__________________________
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A
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Strands of Life
Feeding relationships are major strands
Organisms are connected to each other by their need for energy
supports life’s metabolism
growth
reproduction
cycling of nutrients and chemicals
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“Tug on anything at all and you’ll find it connected to everything else in the universe.” -John Muir, Founder of the Sierra Club
Authors’ own
picture – Tucson, AZ
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A
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“I am I plus my surroundings and if I do not preserve
the latter, I do not preserve myself.”
Jose Ortega y Gasset
Meditations on Quixote 1914
Authors’ own Picture
Tucson, AZ
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Who Composes the Strands
of Life? Producers - Autotrophs: plants
able to use energy from the sun to make
their own food
Consumers - Heterotrophs: animals
unable to make their own food
Decomposers: organisms which cause decay Bacteria, Mushrooms, Fungus
WHY is decomposition vital to the health of the environment???
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Organisms And Groups
Organisms in an ecosystem can be grouped by the way they acquire and contribute food.
Producers
Consumers
Herbivores: plant eaters
Carnivores: meat eaters
Omnivores: generalists (eat both)
Scavengers
Decomposers
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All Biological Activity
Requires Energy
Food chains and food webs are based on the flow of energy and matter from one organism to another.
ENERGY
Producer Consumer(s)
Matter
Flow
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Food Web
Connection of all food chains in a community
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A
a
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Balance of Life
Food webs and food chains keep living
organisms in balance.
These interactions keep population numbers in
check.
HOW?????
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Community Producers + Consumers + Decomposers
that all live and interact in one area
Producers
Decomposers Consumers
=
Community
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Energy of Food Chains
Animals receive chemical energy from the food
they eat (plants and/or other animals).
Plants are producers. Where does their
energy come from?
Sunlight
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Life Involves Activity &
Activity Requires Energy
If supply of energy stops, life stops
A constant cycle of matter is also needed
because matter traps energy and transports it
within the organism or to another organism
Food is matter and contains energy
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Flow of Energy is Inefficient
Energy escapes a food chain as heat.
Energy must constantly enter a community,
beginning with photosynthesis, or the
community will die.
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Why is Energy Lost??
Energy received from food is used:
to warm body
maintenance of body
growth reproduction
Organisms have selfish needs that make
energy unavailable to next consumer
HEAT loss – escapes into the environment,
and back out into space.
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How do these 2 communities differ?
Biotic and Abiotic Variables??? Author’s personal files
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Author’s own picture Tucson, AZ
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Desert Community ***Provide pictures of Sonoran Desert species
and ask the students to research their feeding
preferences in order to construct a desert food
web.
Badger Horned Toad Road Runner
Javelina Bobcat Jack Rabbit
Lizards Cacti Harvester Ants
Toads Snakes Prickly Pear
Kit Fox Gambel’s Quail Mesquite Tree
The list is endless…!!
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A
a
Author’s own picture Roadrunner Tucson, AZ
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A
a
Author’s own picture Horned Toad Tucson, AZ