Chapter:3 Ecosystem Ecology

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Presentation transcript:

Chapter:3 Ecosystem Ecology

ecosystem structure abiotic components biotic components ecosystem size ecosystem boundaries

Biosphere

Biosphere II “Any kid’ll tell you you can’t keep eight scientists in a giant mayonnaise jar unless you put holes in the top of the thing.” - Jay Leno Biosphere II

Biosphere II

the guinea pigs

the ocean

the savanna

Earth’s Life-Support Systems One way flow of high-quality energy Cycling of matter Fig. 3-6, p. 39

Energy flows through ecosystems photosynthesis cellular respiration

Categories of organisms autotrophs vs. heterotrophs types of consumers scavengers, detritivores, decomposers

food chains and trophic levels

food webs

gross primary productivity net primary productivity

old-growth forest: large standing crop, low productivity

ocean algae: high productivity, low standing crop

trophic pyramids and ecological efficiency

hydrologic cycle

carbon cycle

nitrogen cycle

algal bloom

phosphorus cycle

Ecosystem Disturbance

pre- Hurricane Katrina

post- Hurricane Katrina

watershed

Resistance vs. Resilience

Ecosystem Services instrumental value intrinsic value

Instrumental Values provisions (goods like food, timber, medicine) regulating services (like climate modification support systems (like pollination, and water purification) cultural services (aesthetic value of nature)

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