Unit 15b Biosphere climate and biomes

26
15.1 Life in the Earth System KEY CONCEPT The biosphere is one of Earth’s four interconnected systems.

Transcript of Unit 15b Biosphere climate and biomes

Page 1: Unit 15b Biosphere climate and biomes

15.1 Life in the Earth System

KEY CONCEPT The biosphere is one of Earth’s four interconnected systems.

Page 2: Unit 15b Biosphere climate and biomes

15.1 Life in the Earth System

The biosphere is the portion of Earth that is inhabited by life. What kinds of things would it include?

• The biosphere includes all ecosystems.– one of Earth’s systems

– includes the biota, all the living things in the biosphere

Page 3: Unit 15b Biosphere climate and biomes

15.1 Life in the Earth System

• There are three other Earth systems.

– Hydrosphere—water, ice, and water vapor (Oceans, Rivers, Lakes, and groundwater)

– Atmosphere—air blanketing Earth’s solid and liquid surface

– Geosphere—geologic features above and below Earth’s surface

– Life has been found in all of these systems and virtually everywhere we have looked

Page 4: Unit 15b Biosphere climate and biomes

15.2 Climate

KEY CONCEPT Climate is a key abiotic factor that affects the biosphere. How?

Page 5: Unit 15b Biosphere climate and biomes

15.2 Climate

Climate is the prevailing weather of a region.

• Climate is the long-term pattern of weather conditions. What conditions would be included?– average temperature– precipitation– relative humidity

• Key factors shape an area’s climate.– temperature– sunlight– water– wind

Page 6: Unit 15b Biosphere climate and biomes

15.2 Climate

• A microclimate is the climate of a small specific place within a larger area.

Page 7: Unit 15b Biosphere climate and biomes

15.2 Climate

Earth has three main climate zones.

• The three main zones are the polar, tropical, and temperate climates. Which do we live in?– polar climate: the far northern

and southern regions ofEarth

– tropical zone: surrounds the equator

– temperate zone: the wide area in betweenthe polar and tropical zones

Page 8: Unit 15b Biosphere climate and biomes

15.2 Climate

• The angle of the Sun’s rays determine an area’s climate.

temperatetemperate

polarpolar

tropicaltropical

temperatetemperate

polarpolar

90 N

Page 9: Unit 15b Biosphere climate and biomes

15.2 Climate

• Earth’s tilt on its axis results in seasonal change.

• Solar heating causes movements in both water and air. Why?– wind– ocean currents

• Earth’s rotation also has effects on the winds and currents. How?

• The uneven heating of the Earth is the ultimate cause of all weather. Why?

Page 10: Unit 15b Biosphere climate and biomes

15.2 Climate

• Mountains have an effect on climate. How?

western slope eastern slope

– Precipitation occurs on the side of the mountain facing the wind. Why?

– On the downwind side, drier and cooler air produce a rain shadow. Why?

Page 11: Unit 15b Biosphere climate and biomes

15.3 Biomes

KEY CONCEPT Biomes are land-based, global communities of organisms.

Page 12: Unit 15b Biosphere climate and biomes

15.3 Biomes

Earth has six major biomes.• A biome is a major community of organisms.

Page 13: Unit 15b Biosphere climate and biomes

15.3 Biomes

• Tropical rain forest biomes produce lush forests. Why?

– warm temperature– abundant

precipitation all year

Source: World Meteorological Organization

Page 14: Unit 15b Biosphere climate and biomes

15.3 Biomes

• Grassland biomes are where the primary plant life is grass.

Rapid City, South Dakota

Source: National Oceanic Atmospheric Administration

Page 15: Unit 15b Biosphere climate and biomes

15.3 Biomes

– Temperate grasslands are dry and warm during the summer; cold in winter with most precipitation falls as snow.

• Grassland biomes are where the primary plant life is grass.

– Tropical grasslands are warm throughout the year, with definite dry and rainy seasons.

Page 16: Unit 15b Biosphere climate and biomes

15.3 Biomes

• Desert biomes are characterized by a very arid climate. Why?– very low amount of

precipitation– four types: hot, semi-

arid, coastal, and cold

Tucson, Arizona

Source: National Oceanic Atmospheric Administration

Page 17: Unit 15b Biosphere climate and biomes

15.3 Biomes

• Temperate forest biomes include deciduous forests and rain forests.– Temperate deciduous forests have hot summers and

cold winters.– Deciduous trees are the dominant plant species.

Source: National Oceanic Atmospheric Administration

Burlington, Vermont

Page 18: Unit 15b Biosphere climate and biomes

15.3 Biomes

– Deciduous trees are the dominant plant species.– The temperate rain forests have a long wet season and

relatively dry summer.

• Temperate forest biomes include deciduous forests and rain forests.– Temperate deciduous forests have hot summers and

cold winters.

– Ferns and moss cover the forest floor. 

Page 19: Unit 15b Biosphere climate and biomes

15.3 Biomes

• The taiga biome is located in cooler northern climates.– boreal forest– long winters and short

summers– small amount of

precipitationSource: Environment Canada

Banff, Canada

Page 20: Unit 15b Biosphere climate and biomes

15.3 Biomes

• The tundra biome is found in the far northern latitudes with long winters.– winter lasts 10 months– limited precipitation– permafrost

Barrow, Alaska

Source: National Oceanic Atmospheric Administration

Page 21: Unit 15b Biosphere climate and biomes

15.3 Biomes

• Minor biomes, such as chaparral, occur globally on a smaller scale.

Page 22: Unit 15b Biosphere climate and biomes

15.3 Biomes

Polar ice caps and mountains are not considered biomes.• Polar ice caps have no soil, therefore no plant community. • The climate and organisms found on mountains change as

the elevation changes.

Page 23: Unit 15b Biosphere climate and biomes

15.3 Biomes

1. Which type of growth occurs when a population has unlimited resources and no predators?

• A. logistic growth • B. exponential growth • C. S-shaped growth • D. population crash

Page 24: Unit 15b Biosphere climate and biomes

15.3 Biomes

Which type of growth occurs when a population has unlimited resources and no predators?

• A. logistic growth • B. exponential growth • C. S-shaped growth • D. population crash• Correct Answer = B

Which of the following can cause a population crash? • A. a rise in the carrying capacity for a population • B. a rise in the emigration rate • C. a drop in the immigration rate • D. a drop in the carrying capacity for a population

Page 25: Unit 15b Biosphere climate and biomes

15.3 Biomes

Which type of growth occurs when a population has unlimited resources and no predators?

• A. logistic growth • B. exponential growth • C. S-shaped growth • D. population crash• Correct Answer = B

Which of the following can cause a population crash? • A. a rise in the carrying capacity for a population • B. a rise in the emigration rate • C. a drop in the immigration rate • D. a drop in the carrying capacity for a population• Correct Answer = D

Page 26: Unit 15b Biosphere climate and biomes

15.3 Biomes

Review

• The biosphere is the part of Earth that contains all living things and includes all the ecosystems.

• Climate is the prevailing weather over an area• The uneven heating of the Earth due to its shape, tilt and

rotation determines weather.• The Earth has six major biomes:

– Tropical Rainforest– Grasslands– Desert– Temperate forest– Taiga– Tundra