bioed online interdependence of life: ecosystems by deanne erdmann, ms bioed online
TRANSCRIPT
BioEd Online
Interdependence of Life:
Ecosystems
By Deanne Erdmann, MS
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Ecological Terminology
Environment
Ecology
Biotic vs. Abiotic
Population
Community
Ecosystem
Biosphere
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Ecosystems
All members of a community, along with their physical and chemical environments
Vary greatly in size Diversity promotes stability and
productivity Dynamic
energy flow chemical cycling
Change over time (succession)
Coral Reefs are a rich,
diverse and productive
ecosystems
A coastal wetland on Lake Superior,
Wisconsin.
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Biomes
Tropical Rainforests
Savannas
Deserts
Temperate Grasslands
Temperate Deciduous Forests
Coniferous Forests
Arctic Tundra
Grasslands in the Great Sand Dunes
National Monument and Preserve
Prairie Creek Redwoods Sate Park
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Aquatic Ecosystems
Freshwater Flowing Water Lakes
Wetlands
Estuaries
Oceans Intertidal or littoral Coastal or neritic Coral Reefs Open Ocean Benthic
Snake River with Grand
Tetons in background
Mountain Lake in Grand Teton National Park
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Zonation in Lakes
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Thermal Stratification in Lakes
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Zonation in a Marine Environment
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Primary Production
The conversion of light energy to chemical energy is called “gross primary production.” (photosynthesis)
Plants use the energy captured in photosynthesis for maintenance and growth.
The energy that is accumulated in plant biomass is called “net primary production.”
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Energy Flow in Ecosystems
Producers (Autotrophs) and Consumers (Heterotrophs)
Trophic Levels Ecological Pyramids of Energy Ecological Pyramids of Biomass Ecological Pyramids of Numbers
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Ecological Pyramids of Energy
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Ecological Pyramids of Biomass
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Biogeochemical Cycles
Cycling of materials between the environment and organisms
Chemical and biological processes
Examples Water cycle Nitrogen cycle Phosphorus cycle Carbon cycle
Plants obtain nitrogenfrom nitrogen-fixing
bacteria and pass it toother organisms through
the food chain
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Water Cycle
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Nitrogen Cycle
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Carbon Cycle
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Biogeochemical Cycle Activity
Pass out untitled diagrams of the water cycle, nitrogen cycle, and carbon cycle.
Have students title each cycle and explain why they chose these titles.
Provide a list of labeling terms and have students create labels for each stage or process on all three diagrams.
Applications/suggestions Use as an introductory or post-discussion
assessment. Laminate group sets and use erasable
markers to save paper and prep time.
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