Competition and Interdependence

• What should you be able to describe by the end of this video?

  Levels of organization in an ecosystem
• What is the definition of a habitat?

  The environment in which an organism lives
• What is a population?

  Total number of organisms of the same species
• Where must the organisms in a population live?

  The same geographical area
• What is a community?

  Populations of all different species in a habitat
• What is the biotic part of the environment?

  All of the living organisms
• What does the word biotic mean?

  Living
• What are the nonliving parts of an environment called?

  Abiotic parts
• What does an ecosystem consist of?

  Biotic and abiotic parts of an environment
• What also does an ecosystem include?

  How the biotic and abiotic parts interact
• What do living organisms require from their surroundings?

  A supply of materials
• What is the problem regarding resources in an ecosystem?

  They are often in short supply
• What does a shortage of resources mean for living organisms?

  They have to compete with each other
• What do plants compete with each other for?

  Light, space, water, and mineral ions
• What do animals compete with each other for?

  Food, water, mating partners, and territory
• What is interdependence?

  Species in a community depend on each other
• What do all animals depend on other living organisms for?

  Food
• What can plants depend on animals for?

  Spreading their pollen
• What happens if a species disappears from a community?

  It can affect the whole community
• What might happen if bees disappear from a community?

  Plants would not get pollinated
• What could happen to animals that feed on plants if the plants do not get pollinated?

  They could run out of food
• What is a stable community?

  Populations remain fairly constant
• What is the state of populations in a stable community?

  In balance with each other
• What are the populations of organisms in balance with in a stable community?

  Abiotic resources