Presentation on theme: "An ecosystem is a complete community of"— Presentation transcript:
1An ecosystem is a complete community of biotic and its abiotic environment.An ecosystem can be as large as the SaharaDesert or as small as a puddle.Ecosystems are interactions between plants,animals, microorganisms and theirenvironment; working together as a functionalunit.
2Ecosystems will fail if they do not remain in balance. No community can carry more organisms than itsfood, water, and shelter can accommodate.Food and territory are often balanced by naturalphenomena such as fire, disease, and the number ofpredators.Each organism has its own niche or role, to play.
33 groups: based on how organisms obtain their food Energy in Ecosystems3 groups: based on how organisms obtain their foodProducers “Photosynthesis”are organisms that make theirown food through photosynthesis.Example: Plants
4Consumers “Eat” Types of Consumers are organisms that consume (eat) producers and other consumers to get energy.Examples: AnimalsTypes of ConsumersHerbivores are animals that eat only plants.Carnivores eat mainly other animals.Omnivores eat a significant amountof both plants and animals.
5Decomposers “Break Down” are organisms that break down deadmatter or animal wastes to get energy.Examples: Fungus and Bacteria
6Decomposer (bacteria) Food Chainsare diagrams that show the transfer of energy.All food chains begin with producers.A food chain starts with what gets eaten and thearrows point towards what does the eating.Food chains only go in one direction.The food chain below is an example of one thatyou might find in an ecosystem.ProducerPrimary consumerDecomposer (bacteria)Tertiary consumerSecondary consumer
7Food Web In the wild, animals may eat more than one thing, so they belong to more than one food chain.A food web shows howthe food chains in anecosystem connect toone another.To get the food theyneed, small herbivoresmay eat lots of differentplants, and carnivoresmay eat many differentanimals.
8Food WebThe arrows in the diagram show the direction of energy flow in each food chain.
9Name the parts of this food chain. Tertiary consumerPrimary consumers220.127.116.11.ProducerSecondary consumer
10Breaking the Chain Organisms living in a habitat depend on each other. If one part of a food chain dies out or is greatlyreduced, the consumers have to find alternativefood, move away, or starve.
11Earth's Biomes A biome is a large region on Earth characterized by a specific type of climate and the biotic things that live there.Climate is the average weather conditionsin an area over a long period of time.ForestsGrasslandsDesertsTundraFreshwaterMarine WaterClimate Zones:Tropical ZoneTemperate ZonePolar Zone
123 Major Types of Ecosystems Terrestrial EcosystemsFreshwater EcosystemsMarine Ecosystems
16Identifying Ecosystems I. Objective:In this activity students will identify the characteristics of ecosystems and how different ecosystems support different organisms.II. Procedure:On a construction paper create a model of an ecosystem that will be assigned to your group. Drawings, pictures, cut outs and or natural materials such as grass or leaves can be used to create your model.Fill in the following with the appropriate information:Description: a brief summary of what the ecosystem is.Name of EcosystemAverage TemperatureAverage PrecipitationSoil Characteristics (ex. Rocky)Examples of Plants (at least 3)Examples of Animals (at least 3)Type of Biome (ex. Desert)Example of a Place where this ecosystem is found (ex. Southern California)