major ecosystems of the world chapter 6 key topics 1.fire 2.biomes 3.aquatic ecosytems
TRANSCRIPT
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Major Ecosystems of
the World
Chapter 6Key Topics1. Fire2. Biomes3. Aquatic Ecosytems
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Fire
Fire Triangle?Fires Impact?Which biomes burn regularly?Current state of affairs?Crown Vs. Ground?Prescribed Burning?
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Arizona Wallo Wildfire 2011 500K plus acres!
Ponderosa Pine Timber Operations Smoky the Bear Drought 4FRI 20-50 trees Vs. 500-1K
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Earth’s Major Biomes
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Arizona Biomes
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Earth’s Major Biomes
Vertical Zonation: The Distribution of Vegetation on Mountains
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Earth’s Major Biomes
Type of biome controlled by temperature and precipitation
9 Major Biomes1.Temperate Rain Forest2.Tropical Rain Forest3.Temperate Deciduous4.Boreal/Taiga5.Tundra6.Chaparral7.Deserts8.Savannah (equatorial)9.Temperate Grasslands
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Primary Forest
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Aquatic Ecosystems
Divisions:①Degree of Salt②DO③Light Penetration④Nutrients⑤Temperature⑥Wave action
Important Terms①Phytoplankton②Zooplankton③Nekton④Benthos⑤Detritus⑥Eutrophication
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Aquatic Ecosystems
Headwaters•Tend to be narrow, swift, clear, cold, nutrient poor, and highly oxygenated
•Tend to be wide, slow, cloudy, warm, nutrient rich, and less oxygenated
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Oxbow Lakes & Deltas
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Aquatic EcosystemsFreshwater Ecosystems
Lakes and Ponds
Highly productive, high species richness - sunlight penetration / rooted plants
Photosynthetically productive - upper surface with light penetration
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Aquatic Ecosystems
Freshwater Ecosystems
Lakes and Ponds
Not always present; anaerobic, dominated by decomposers - below light penetration
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Thermocline - lakes
Freshwater Ecosystems
Thermal stratification in temperate lakes
Point of change between warm surface & cold depths
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Turnover in Lakes
Nutrients!
Spring Turnover - Melting Ice (40C) & wind
Fall Turnover - cooling surface water & wind
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Wetlands - Marshes and Swamps
•Highly productive
•Anaerobic
•Filters pollution
•Flood Control
•Recharging Centers
•Highly Threatened
•Ecosystem Services
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Estuaries
Salt Marshes Mangrove Forests
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Case-in-Point: The Everglades
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Case-in-Point: The Chesapeake Bay
Ecosystem Service
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Marine Zones
Marine Provinces1.Neritic2.Oceanic3.Pelagic4.Benthic
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Photo BenthicPhoto Benthic Environment
1) Sea grasses
2) Kelp forests
3) Coral reefs
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Abyssal
*Marine Snow