BioEd Online Interdependence of Life: Ecosystems By Deanne Erdmann, MS BioEd Online.

BioEd Online

Interdependence of Life:

Ecosystems

By Deanne Erdmann, MS

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www.BioEdOnline.orgBioEd Online

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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BioEd Online Interdependence of Life: Ecosystems By Deanne Erdmann, MS BioEd Online.

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