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ECOSYSTEMS

ECOSYSTEMS. Big Idea: Organisms in ecosystems exchange energy and nutrients among themselves and with the environment. Lesson 1 What is an Ecosystem?. There are two parts of an ecosystem: Biotic-Living Things-They are everything from the tiniest bacteria to the tallest trees.

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ECOSYSTEMS

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  1. ECOSYSTEMS Big Idea: Organisms in ecosystems exchange energy and nutrients among themselves and with the environment.

  2. Lesson 1What is an Ecosystem? There are two parts of an ecosystem: Biotic-Living Things-They are everything from the tiniest bacteria to the tallest trees. Abiotic-Non-Living Things-Rocks, Soil, Water, and Climate: Clouds, Air, Sun ECOSYSTEMS are areas in which organisms interact, or relate, with one another and with the nonliving parts of the environment.

  3. Biotic Parts (Living parts) of an EcosystemThe biotic parts of an ecosystem help shape the environment. Plant roots anchor the soil. Burrowing animals such as moles and prairie dogs change the shape of the ground. Tiny animals such as earthworms, loosen and mix the soil as they tunnel through it.

  4. Biotic Parts of an EcosystemSome biotic parts also interact with one another. Bees pollinate flowers Squirrels nest in oak trees and help scatter acorns. Larger animals eat plants and other animals Fungi break down dead organisms

  5. An ecosystem’s abiotic parts help determine what lives in it. • Most organisms can only live within a certain range of temperatures and moisture levels. • Most plants could not survive in a desert climate because they need more water. • Polar bears cannot live in a sunny, warm climate. Plants in the rainforest need a lot of water.

  6. Types of Ecosystems Rainforest Tundra

  7. Types of Biomes Taiga Prairie

  8. Map of the Earth’s Biomes

  9. Active Ecosystems Take a walk in the forest. Go for a swim in the lake or the ocean. You may not notice it, but… All around us, energy is being transferred between organisms living in that ecosystem. This is because healthy ecosystems are active.

  10. Here are some activities that are going on in ecosystems Living things such as earthworms, fungi, and bacteria help form soil rich in nutrients. Decaying plant and animal remains form humus (hyoo-muhs). Healthy marine systems have kelp that provides nutrients for ocean life.

  11. A Place to LiveEcosystems have different types of plants and animals POPULATION A group of squirrels A population is a group of organisms of the same species living together in an ecosystem. A hive of honeybees A grove of trees

  12. COMMUNITY The populations of a community interact with each other. For example, Cacti have connections with many animals of the desert ecosystem. All of the populations living in an ecosystem make up a community.

  13. HABITAT is the part of the ecosystem where the organism lives You live in Ramona which has many families. Within our town, your family has its own place to live. A habitat is a physical place, within an ecosystem, where a particular species tends to be found. A habitat supplies everyhting the organism needs: warmth, light, water, food, and shelter.

  14. NICHE is an organism’s role in an ecosystem. The hawk and the owl eat the same type of food and can co-exist in one habitat because hawks hunt in the daytime and owls hunt at night. Two species cannot share the same niche in an ecosystem! If two populations in a habitat shared the same niche they would compete for food, shelter, and other resources.

  15. DIVERSITY Some ecosystems are very diverse, while others have just a few species. is a measure of the number and the variety of the species in an ecosystem. Rainforests are a very diverse ecosystem on land. Coral reefs are among the most diverse of all water ecosystems. These ecosystems are closer to the equator.

  16. Ecosystems closer to the poles (North and South) have less diversity.

  17. Humans and their actions also cause less diversity in an ecosystem.

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