Unit 5 Lesson 1 What Is an Ecosystem?
Copyright © Houghton Mifflin Harcourt Publishing Company
Unit 5 Lesson 1 What Is an Ecosystem?
What Is an Ecosystem?
Copyright © Houghton Mifflin Harcourt Publishing Company
• An ...
Unit 5 Lesson 1 What Is an Ecosystem?
What Is an Ecosystem?
Copyright © Houghton Mifflin Harcourt Publishing Company
• Abi...
Copyright © Houghton Mifflin Harcourt Publishing Company
• A group of organisms of the same species in an
ecosystem is cal...
Copyright © Houghton Mifflin Harcourt Publishing Company
• The different populations that share an ecosystem
make up a com...
Copyright © Houghton Mifflin Harcourt Publishing Company
• Populations in every ecosystem need food, water,
shelter, and s...
Copyright © Houghton Mifflin Harcourt Publishing Company
• Populations that compete and obtain enough
resources will survi...
Copyright © Houghton Mifflin Harcourt Publishing Company
• An organism’s habitat is the place where it lives
within an eco...
Copyright © Houghton Mifflin Harcourt Publishing Company
• Every organism has a niche. Having different
niches allows diff...
Copyright © Houghton Mifflin Harcourt Publishing Company
• Populations can share a habitat but not the same
niche.
• For e...
Copyright © Houghton Mifflin Harcourt Publishing Company
• Diverse means different in kind. Diversity is the
variety of di...
• Climate and location affect the amount and types
of resources that are available for organisms.
• Generally, very divers...
Copyright © Houghton Mifflin Harcourt Publishing Company
Unit 5 Lesson 1 What Is an Ecosystem?
• Humans can damage ecosyst...
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Ecosystem

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Transcript of "Ecosystem"

  1. 1. Unit 5 Lesson 1 What Is an Ecosystem? Copyright © Houghton Mifflin Harcourt Publishing Company
  2. 2. Unit 5 Lesson 1 What Is an Ecosystem? What Is an Ecosystem? Copyright © Houghton Mifflin Harcourt Publishing Company • An organism’s environment is all the living and nonliving things that surround and affect the organism. • Environments include biotic and abiotic parts. Biotic parts are living things in an environment, such as plants, animals, and other organisms. • Abiotic parts are nonliving things in an environment, such as climate, water, soil, light, air, and nutrients.
  3. 3. Unit 5 Lesson 1 What Is an Ecosystem? What Is an Ecosystem? Copyright © Houghton Mifflin Harcourt Publishing Company • Abiotic parts of an environment have an important role. Temperature and amount of water affect which plants and animals can live in a place. • An ecosystem is all the organisms living in a place together with their environment. Each ecosystem has its own living and nonliving things. • An ecosystem can be huge, such as a large forest or desert, or it can be small, such as a mud puddle or a single bush.
  4. 4. Copyright © Houghton Mifflin Harcourt Publishing Company • A group of organisms of the same species in an ecosystem is called a population. • Each ecosystem contains different groups of living things. A savanna ecosystem may contain populations of zebras as well as grasses and trees. Unit 5 Lesson 1 What Is an Ecosystem? Populations and Communities
  5. 5. Copyright © Houghton Mifflin Harcourt Publishing Company • The different populations that share an ecosystem make up a community. • A community consists of all the populations that live and interact in an area. Unit 5 Lesson 1 What Is an Ecosystem? Populations and Communities
  6. 6. Copyright © Houghton Mifflin Harcourt Publishing Company • Populations in every ecosystem need food, water, shelter, and space to live. • The interaction between populations to meet these needs is called competition. Unit 5 Lesson 1 What Is an Ecosystem? Populations and Communities
  7. 7. Copyright © Houghton Mifflin Harcourt Publishing Company • Populations that compete and obtain enough resources will survive, while those that cannot compete will not survive. • These resources are called limiting factors, because there is only enough food, water, shelter, and space to support a certain number of organisms. • Competition also occurs within populations. Stronger individuals get the most food and best shelter. Thus, weaker individuals may not survive. Unit 5 Lesson 1 What Is an Ecosystem? Populations and Communities
  8. 8. Copyright © Houghton Mifflin Harcourt Publishing Company • An organism’s habitat is the place where it lives within an ecosystem. Several populations share the same habitat. • An organism’s niche is its complete role or function in its ecosystem. A niche includes all the ways the organism survives. • An organism’s niche includes how it finds food, as well as the climate in which it thrives. Unit 5 Lesson 1 What Is an Ecosystem? Find Your Niche
  9. 9. Copyright © Houghton Mifflin Harcourt Publishing Company • Every organism has a niche. Having different niches allows different organisms to survive in the same habitat. • Organisms with a specific way of living have a narrow niche. For example, an animal that eats only one type of food cannot survive without that food. • Organisms with narrow niches tend to live in specific places, while those with broad niches often move around large areas. Unit 5 Lesson 1 What Is an Ecosystem? Find Your Niche
  10. 10. Copyright © Houghton Mifflin Harcourt Publishing Company • Populations can share a habitat but not the same niche. • For example, red-shouldered hawks and barred owls share a habitat, but have different niches. They both hunt different prey at different times of the day. • If two populations of organisms share a niche, they must compete for resources. Unit 5 Lesson 1 What Is an Ecosystem? Find Your Niche
  11. 11. Copyright © Houghton Mifflin Harcourt Publishing Company • Diverse means different in kind. Diversity is the variety of different species that live in an ecosystem. • An ecosystem that is very diverse contains many species. Ecosystems without much diversity may be inhabited by only a few species. • Organisms are connected in a large, complex web. The more types of organisms in an ecosystem, the larger the web, and the more resources available. Unit 5 Lesson 1 What Is an Ecosystem? Diversity
  12. 12. • Climate and location affect the amount and types of resources that are available for organisms. • Generally, very diverse ecosystems, such as coral reefs and rain forests, are near the equator. Less diverse ecosystems are farther from the equator. Copyright © Houghton Mifflin Harcourt Publishing Company Unit 5 Lesson 1 What Is an Ecosystem? Diversity
  13. 13. Copyright © Houghton Mifflin Harcourt Publishing Company Unit 5 Lesson 1 What Is an Ecosystem? • Humans can damage ecosystems and affect diversity by reducing the number of species living in the ecosystem. • Activities such as overhunting or destroying forests to build may lower the numbers of important species. • Species in those environments have lost their habitats, and diversity has decreased. Diversity
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