name 3 things you observe about this picture.. what is ecology?
TRANSCRIPT
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Name 3 things you observe about this picture.
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What is Ecology?
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Ecology is…
• The study of how organisms interact with each other and with their non-living environment.
• The science that tries to answer questions about how nature works—the BIG picture
• The key word is INTERACT
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What is an ecosystem?
• All of the organisms living in a geographical area (region) interacting with each other and with the non-living features of their environment.
• Earth is one huge ecosystem!
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• A Population is…All of the organisms in an ecosystem that belong to the same species
•A Community is …All the populations (plant and animal) living in an ecosystem
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2 PARTS OF AN ECOSYSTEM
•ABIOTIC (NON-LIVING)
•BIOTIC (LIVING)
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BIOTIC FACTORS – all living things in the ecosystem and the waste they produce
•All the plants and animals living in the area
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ABIOTIC FACTORS (Non-living parts of the ecosystem that affect the species that live there.•Sunlight/shade•Temperature•Precipitation (rain, snow, sleet, or hail)
•Wind•Elevation above sea level•Type of soil
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A Habitat is…Place where an organism or a community of organisms lives,including all living and nonliving factors plus the conditions of the surrounding environment.
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What is a MICROHABITAT?
Definition: A small specialized habitat within a larger habitat.
Examples: 1. my backyard within the west Katy rice field and pasturelands.
2. a canopy tree within the rainforest
3. a pond within a field
4. this room within the school
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What is Photosynthesis?Photo means “light”
Synthesis means “to put together”
The process in which a plant’s chlorophyll traps light energy and sugars are produced.
Radiant energy (sunlight) is converted into chemical energy (food for the plant)
Carbon dioxide + water + light energy = glucose + Oxygen
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6CO2 + 6H2O + radiant energy = C6H12O6 + 6O2
carbon + water + sunlight = glucose + oxygen
dioxide
Photosynthesis uses the carbon dioxide in the atmosphere plus water to make glucose (sugar) and oxygen.
Leaves are where most gas exchange takes place.
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CHLOROPLAST
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Why Photosynthesis is Important to YOU
1. Breathing – plants take in carbon
dioxide (waste product from us) and
releases oxygen that we need
2.Producers – Make own food – We
eat them and we eat the other
animals that eat plants (i.e. wheat,
corn, cows)
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https://www.youtube.com/watch?v=eo5XndJaz-Y
Let’s watch a quick clip about photosynthesis!
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Producers (Autotrophs) – make their own food (photosynthesis)
Consumers (Heterotrophs) – (cannot make their own food) eat other organisms for food
Interactions within the communities
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Decomposers* Organisms that break down
dead or decaying organisms
* Eat wastes, dead animals and plants
* Fungi, bacteria, worms
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A food chain is one feeding relationship
https://www.youtube.com/watch?v=0ZOvqYypOuo
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Food Webs are multiple feeding relationships (multiple food chains interconnected)
https://www.youtube.com/watch?v=MGODmyXkkPU
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Trophic levels
• The trophic level of an organism is its position in a food pyramid, food web, food chain (the sequence of consumption and energy transfer through the environment).
• Trophic levels are easily identifiable on an energy pyramid:
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Energy Pyramid
An energy pyramid is a graphical model of energy flow in a community.
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Trophic levels
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Draw
This!
Where do Humans fit?
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* The further up the pyramid, the more an organism has to eat to get the same amount of energy.
* Energy is burned up (used) through activity at each level. Only a percentage of energy is available from one level to the next as you move up the pyramid