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Lesson 5 An Introduction to Ecology and Biosphere

Self Study Test

I. Introduction

Importance of ecology

II. Environment and Ecosystems

A. Ecological organization

1. Population

2. Communitty

3. Ecosystem

4. Biosphere

B. Biomes (ecosystems)

1. Terrestrial biomes

2. Aquatic biomes

C. Factors affecting the distribution of the ecosystems

1. Biotic factors

2. Abiotic factors

D. Extent of vegitation determined by interplay of rainfall and temperature

1. Weather and climate

2. Sun determines (drives) climate and therefore type of vegetation

3. Latitude - temperature and degree of temperature variation

4. Air currents determine precipitation patterns

5. Ocean currents

a. Moderates coastal climate

b. Moderates temperature extremes

6. Elevation - temperature and precipitation

III. Survey of terrestrial ecosystems

A. Tropical rain forest

1. Warmest and wettest

2. 6% of earth's surface, but two thirds of all species (5 to 8 million)

3. Arboreal plants and animals

4. Low soil fertility

5. 50% of worlds oxygen production

B. Tropical deciduous forests

C. Deserts

D. Chaparral

E. Grasslands

F. Temperate deciduous forests

G. Temperate rain forests

H. Taiga

I. Tundra

IV. Survey of aquatic ecosystes

A. Importance: covers 71% of Earth's surface

B. Effect of water: moderate temperature

C. Energy (top) and nutrients (bottom) determine the types of life present

D. Freshwater ecosystems

E. Marine ecosystems


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