Unit 5 Lesson 1 What Is an Ecosystem?

Name: Unit 5 Lesson 1 What Is an Ecosystem?
Uploaded: 2017-08-15T11:41:12+00:00
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Description: Unit 5 Lesson 1 What Is an Ecosystem?

Unit 5 Lesson 1 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 Copyright © Houghton Mifflin Harcourt Publishing Company

Abiotic parts are nonliving things in an environment, such as climate, water, soil, light, air, and nutrients. Abiotic parts of an environment have an important role. Temperature and amount of water affect which plants and animals can live in a place. Copyright © Houghton Mifflin Harcourt Publishing Company

What Is an Ecosystem? Unit 5 Lesson 1 What Is an Ecosystem?

What Is an Ecosystem? Word bank White ibis birds Black bears Water
Unit 5 Lesson 1 What Is an Ecosystem? What Is an Ecosystem? Word bank White ibis birds Black bears Water Moist air Muddy soil Black berry bushes Pitcher plants Shady areas Climate Mosquitoes Willow trees Copyright © Houghton Mifflin Harcourt Publishing Company

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. Copyright © Houghton Mifflin Harcourt Publishing Company

Populations and Communities
Unit 5 Lesson 1 What Is an Ecosystem? Populations and Communities 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. Copyright © Houghton Mifflin Harcourt Publishing Company

Unit 5 Lesson 1 What Is an Ecosystem? Populations and Communities 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. Copyright © Houghton Mifflin Harcourt Publishing Company

Unit 5 Lesson 1 What Is an Ecosystem? Populations and Communities Populations in every ecosystem need food, water, shelter, and space to live. The interaction between populations to meet these needs is called competition. Copyright © Houghton Mifflin Harcourt Publishing Company

Unit 5 Lesson 1 What Is an Ecosystem? Populations and Communities 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. Copyright © Houghton Mifflin Harcourt Publishing Company

Find Your Niche Unit 5 Lesson 1 What Is an Ecosystem?

Find Your Niche 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. Copyright © Houghton Mifflin Harcourt Publishing Company

Find Your Niche 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. Copyright © Houghton Mifflin Harcourt Publishing Company

Find Your Niche 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. Copyright © Houghton Mifflin Harcourt Publishing Company

Diversity 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. Copyright © Houghton Mifflin Harcourt Publishing Company

Diversity 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. Copyright © Houghton Mifflin Harcourt Publishing Company

Diversity 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

Diversity 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. Copyright © Houghton Mifflin Harcourt Publishing Company

Diversity Unit 5 Lesson 1 What Is an Ecosystem?

Unit 5 Lesson 1 What Is an Ecosystem?

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