Ecosystems

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Here you can find a summary of the Unit 4 contents.

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Ecosystems

  1. 1. EcosystemInteraction between living things and non living things in a place. Ex: Aquatic, terrestrial.HabitatI’ts the place where an organism finds the FOOD, WATER and SHELTER it needs, to live and survive. Ex: ants colony.BiomeIt is a large area in witch we find the sametype of living organisms: animals, plantsand microorganisms. Ex: Desert
  2. 2. Food ChainThere are three groups: each group eats the group below .Living things: animals, plants, microorganisms.Producers: they produce their own food.Ex: Grass, trees and plants.Cosumers: They eat grass, plants and trees (primary C.),other animals (secondary C.)omnivores ( eat plants and wolfanimals)Decomposers : They eat dead deeranimals. To obtain energy. grass
  3. 3. Each group eats the Decomposers grou below. FOOD CHAIN Herbivores Carnivores OmnivoresAnimal Primary Secondary They eatPlats Consumers Consumers plants andmicroorganisms animals They produce Producers their own food.
  4. 4. AQUATIC ECOSYSTEMSAquatic ecosystemS are found in water. Rivers, lakes, seas and oceans are aquatic ecosystems.There are twotypes: fresh water or salt water ecosystem.Rivers: These are cold rivers and warm rivers. In cold rivers we can find, fish like trout of salmon. In warm rivers you can find fish like pirarucu.Lakes : a lot of plants and animals live in lakes for example amphibians, duck s and gees.Seas and oceans: cover most of the Earth surface. Seawater is salty, there is big diversity of animals and plants in oceans and seas.
  5. 5. IMAGES
  6. 6. TERRESTRIAL ECOSYSTEMSForests: * They have a lot of trees because of RAIN and TEMPERATURE. * In forests we can find: - Decidious trees ( fulla caduca) - Evergreen trees (fulla perenne) * They are divided in : - Temperate forests: there are four seasons. - Tropical forests: it is hot all year. Grassland: * The plants are grasses. * They have long periods of rain and periods of drought (sequera) * There aren´t enough water to be a forest. * They are divided in: - Prairies: They have four seasons. - Savannah: It rains a lot. There animals like giraffes, zebras…
  7. 7. Deserts: Deserts are hot an dry. Desert cover 20% of surface. Temperature in deserts experience great variations. Plants and animals that live in deserts adapt to survive in this extreme conditions.Tundra: They are cold areas covered with ice. The soil that is permanently frozen, it is called permafrost. Trees cannot live in frozen soil , so there are no trees. Plants grow during the summer, when the light of the sun partially melts the surface of the ground.

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