Section 1 Terrestrial Biomes Ecosystems Chapter · PDF fileSection 1 Terrestrial Biomes...

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EcosystemsChapter 21
Table of Contents
Section 1 Terrestrial Biomes
Section 2 Aquatic Ecosystems
Chapter 21
Objectives
Identify the eight major biomes.
Compare tundra with taiga.
Compare the different kinds of forests.
Compare the different kinds of grasslands.
Describe the adaptations of desert organisms.
Chapter 21
The Major Biomes
The major types of terrestrial ecosystems, known as
biomes, are tundra, tropical forest, temperate forest,
taiga, temperate grassland, savanna, chaparral, and
desert.
Chapter 21
Earths Major Biomes
Chapter 21
Tundra
Tundra is a cold biome characterized by permafrost
under the surface of the ground.
Chapter 21
Tundra

Chapter 21
Forests
Tropical Forests
Tropical forests receive abundant rainfall and
have stable temperatures.
They have a greater species richness than any
other biome.
Chapter 21
Tropical Rain Forest
Chapter 21
Forests, continued
Temperate Forests
Temperate forests have coniferous trees, which
bear seeds in cones, or deciduous trees, which
shed their leaves each year.
Chapter 21
Forests, continued
Temperate Deciduous Forests
The trees in temperate deciduous forests shed
all of their leaves in the fall.
Chapter 21
Temperate Deciduous Forest
Chapter 21
Forests, continued
Taiga
Taiga is cold but is warmer than tundra and
receives more precipitation.
Taiga is dominated by coniferous forests.

Chapter 21
Taiga
Chapter 21
Grasslands
Temperate Grasslands
Temperate grasslands occur in areas with cold
winters and hot summers.
They are dominated by grasses and herds of
grazing animals.
Chapter 21
Grasslands, continued
Savanna
Savannas are tropical grasslands with alternating
wet and dry seasons.
They are dominated by herds of grazing animals.
Chapter 21
Savanna
Chapter 21
Grasslands, continued
Chaparral
Chaparral is found in coastal regions with warm,
dry summers and mild winters.
It is dominated by dense, spiny shrubs.
Chapter 21
Grassland

Chapter 21
Deserts
Deserts receive less than 25 cm (9.9 in.) of
precipitation per year.
Desert inhabitants have adaptations for conserving
water.
Chapter 21
Desert
Chapter 21
Objectives
Identify the major ocean zones.
Compare the aphotic zone with the photic zone.
Compare the neritic zone with the oceanic zone.
Describe estuaries.
Compare eutrophic lakes with oligotrophic lakes.
Explain the significance of gradient in rivers and streams.
Describe freshwater wetlands.
Chapter 21
Ocean Zones
The photic zone in the ocean receives light, but the
aphotic zone does not.
Other zones of the ocean are defined based on their
relative locations.
Chapter 21
Ocean Zones, continued
The Intertidal Zone
In the intertidal zone, organisms must be able to
tolerate drying and pounding by waves.
Chapter 21
Intertidal Zone

Chapter 21
The Neritic Zone
The neritic zone receives nutrients from the
bottom of the ocean and from land. It is the
oceans richest zone in terms of the number of
species and individuals.
Chapter 21
Neritic Zone
Chapter 21
The Oceanic Zone
Production in the oceanic zone is limited by a
shortage of nutrients.
Chapter 21
Oceanic Zone
Chapter 21
Estuaries
Estuaries are very productive areas where rivers
and streams flow into the sea.
Chapter 21
Freshwater Zones
Lakes and Ponds
Oligotrophic lakes are clear and lacking in
nutrients.
Eutrophic lakes are rich in nutrients and are often
murky.

Chapter 21
Three Lake Zones
Chapter 21
Freshwater Zones, continued
Rivers and Streams
Rivers and streams are bodies of water that flow
down an elevation gradient within a watershed.
Chapter 21
Freshwater Zones, continued
Freshwater Wetlands
Freshwater wetlands are areas of land, such as
marshes and swamps, that are covered with fresh
water for at least part of each year.
Chapter 21
Freshwater Biomes

Section 1 Terrestrial Biomes Ecosystems Chapter · PDF fileSection 1 Terrestrial Biomes...

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