Chapter 3 Ecosystem Disturbances
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Transcript of Chapter 3 Ecosystem Disturbances
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Chapter 3 Ecosystem Disturbances
How do disturbances affect the flow of energy and matter in the ecosystem?
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http://oceana.org/en/our-work/climate-energy/ocean-acidification/learn-act/what-is-ocean-acidification
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http://water.epa.gov/type/watersheds/named/msbasin/hypoxia101.cfm
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HurricanesIce stormsTsunamisTornadoesVolcanic eruptionsForest fires
Natural Ecosystem Disturbances
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Human settlementAgricultureAir pollutionClear cutting of forestsMountaintop removal for coal mining
Anthropogenic Disturbances
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1. Scientists must learn about the natural rates of cycling and the factors that influence those rates.
2. Scientists examine changes that occur in a small confined area as a model for changes on a larger scale.
How do environmental scientists study ecosystem disturbance?
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Watershed comparisons determined that clear cutting released nutrients from the ecosystem into the river at a greater rate than the comparison watershed.
Hubbard Brook Experimental Forest
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Watersheds 4 & 5
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Resistance = how much disturbance effects flow of matter and energy
Resilience = rate of return to original state
Resistance vs Resilience
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Restoration Ecology Florida Everglades
Chesapeake Bay
City Park New Orleans
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What is the role of disturbance in an ecosystem?
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Cultural servicesRegulating servicesResilienceProvisionsSupport systems
What services do ecosystems provide? Pgs 77 - 80