Lecture Chapter 3 - Ecosystems What Are Ecosystems What Are...

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Unformatted text preview: Ecosystems: What Are Ecosystems: What Are They and How Do They They and How Do They Work? Work? Chapter 3 Chapter 3 Key Concepts Key Concepts What is ecology? What is ecology? Major components of ecosystems Major components of ecosystems Energy flow and matter cycles Energy flow and matter cycles What are soils and how do they form? What are soils and how do they form? Ecosystem studies Ecosystem studies Importance of Insects Importance of Insects Pollination Pollination Pest control Pest control Important roles in Important roles in biological community biological community Fig. 3-1, p. 35 Nature of Ecology Nature of Ecology What is ecology? What is ecology? Organisms Organisms Cells Cells Species Species Microbes rule! Microbes rule! Fig. 3-2, p. 37 Populations, Communities, and Populations, Communities, and Ecosystems Ecosystems Populations Populations Genetic diversity Genetic diversity Biological community Biological community Ecosystems Ecosystems Biosphere Biosphere What Sustains Life on Earth? What Sustains Life on Earth? Troposphere Troposphere Stratosphere Stratosphere Hydrosphere Hydrosphere Lithosphere Lithosphere Biosphere Biosphere Fig. 3-5, p. 38 Earth’s Life-Support Systems Earth’s Life-Support Systems One way flow of One way flow of high-quality energy high-quality energy Cycling of matter Cycling of matter Gravity Gravity Fig. 3-6, p. 39 Flow of Solar Energy to and from Flow of Solar Energy to and from the Earth the Earth Greenhouse gases Greenhouse gases Greenhouse effect Greenhouse effect Fig. 3-7, p. 40 Heat radiated by the earth Solar radiation Absorbed by ozone UV radiation Visible light Absorbed by the earth Reflected by atmosphere (34%) Energy in = Energy out Radiated by atmosphere as heat (66%) Lower Stratosphere (ozone layer) Troposphere Greenhouse effect Heat Flow of Solar Energy to and from Flow of Solar Energy to and from the Earth the Earth Fig. 3-7, p. 40 Why is the Earth so Favorable Why is the Earth so Favorable for Life? for Life? Liquid water Liquid water Temperature Temperature Gravity Gravity Atmosphere Atmosphere Ecosystem Concepts Ecosystem Concepts Biomes Biomes Aquatic life zones Aquatic life zones Freshwater life zones Freshwater life zones Ocean or marine life zones Ocean or marine life zones Abiotic and biotic components Abiotic and biotic components Range of tolerance Range of tolerance Law of tolerance Law of tolerance Fig. 3-8, p. 41 Coniferous forest Desert Coniferous forest Prairie grassland Deciduous forest 100–125 cm (40–50 in.) 75–100 cm (30–40 in.) 50–75 cm (20–30 in.) 25–50 cm (10–20 in.) below 25 cm (0–10 in.) Average annual precipitation 4,600 m (15,000 ft.) 3,000 m (10,000 ft.) 1,500 m (5,000 ft.) Coastal mountain ranges Sierra Nevada Mountains...
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