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• Today I will study the components of an ecosystem because I need to understand how living things depend on one another. Essential Question: What would happen to an ecosystem if there were no more bugs? S7L4 What is Ecology? • Ecology is the study of how living things interact with one another and with their environment. What is an ecosystem? • All the living and nonliving things that interact in a particular area make up an ecosystem. • Examples of ecosystems include: oceans, mountains, and forest Ecosystems: Organism: • An organism obtains food, water, shelter, and other things it needs to live, grow and reproduce from its surroundings. Organisms: Habitats….. • The place where an organism lives and provides its basic needs is its habitat. • There can be many habitats in one ecosystem. • List at least 3 habitats that you seen outside today. Habitats: Biotic Factors: • Biotic factors are the living things found inside an ecosystem. • List at least 5 biotic factors found in your environment. Biotic Factors: Abiotic Factors: Abiotic factors are the nonliving parts of an ecosystem. Examples include: 1. 2. 3. 4. 5. Sunlight Water Oxygen Temperature Soil Abiotic Factors: Question: • How do biotic and abiotic factors differ? Species: • A species is a group of similar organisms that can mate with each other and produce fertile offspring. Species: Populations: • All of the members of a species in a particular area are referred to as a population. Populations: Communities: • All the different populations that live together in an area make up a community. • Most ecosystems contain more than one type of organism. Communities: What are the levels of organization? • Organisms make up populations. • Populations make up communities. • And communities make up ecosystems. • Our People Can Eat Bread • Organism, Population, Community, Ecosystem, Biosphere Question???? • Would all the insects in a forest be considered a population? • Why or Why not? Limiting Factors • Anything that restricts or controls the number of individuals in a population Carrying Capacity • The largest number of individuals of one species an ecosystem can support. Competition • All living things compete for – Food – Space • Competition limits population growth. Closing: • “Minute Paper” –What is the most interesting thing you learned today. VIS Term Organism Population Community Ecosystem Biosphere Definition Sentence Picture