Ecosystems - PowerPoint PPT Presentation

1 / 13
About This Presentation



Ecosystems. Photosynthesis. Plants take in energy from the sun. ... In most ecosystems, plants of the main population are where organisms interact. ... – PowerPoint PPT presentation

Number of Views:793
Avg rating:3.0/5.0
Slides: 14
Provided by: jbird6
Tags: ecosystems


Transcript and Presenter's Notes

Title: Ecosystems

Plants take in energy from the sun.
Leaves take in carbon dioxide and give off oxygen
as a by-product.
Plants make glucose to use as food. Food that is
stored is called starch.
Roots take in water and nutrients from the soil.
  • System a group of parts that work together as a
  • A system has cycles and processes that interact,
    or affect each other.
  • Open systems let things out. Thinks coming into
    a system are inputs.
  • Closed systems have no inputs and no outputs.
  • Over time a system will reach stability changes
    in the system cancel each other out.

Parts of an Ecosystem
  • Groups of living things and the environment they
    live in make up an ecosystem.
  • A group of the same species living in the same
    place at the same time is a population.
  • Several populations of different kinds can exist
    in one ecosystem.
  • A swamp is an area that is sometimes covered in
    shallow water.

Parts of an Ecosystem
  • In most ecosystems, plants of the main population
    are where organisms interact.
  • A community is made up of all the populations
    that live in the same area.
  • Nonliving parts of an ecosystem interact with one
    another and with living things.
  • Nonliving things are sunlight, soil, air, water,
    and temperature.

Living Things in an Ecosystem
  • Habitat an environment that meets the needs of
    an organism
  • Niche role
  • Producers Make their own food (plants and
  • Consumer Eat other living things (herbivores,
    carnivores, and omnivores)
  • Decomposers feed on the wastes of plants and
    animals or on their remains after they die,
    returning nutrients to the soil.

Energy Pyramid
  • A diagram called an energy pyramid shows how much
    food energy is passed form one organism to
    another along a food chain.

Food Web
Changes in the Ecosystem
  • Over time, changes in climate, rate of erosion,
    and populations can cause big changes in an
  • Some changes, such as storms or changes caused by
    people, can change an ecosystem quickly.

Changes in the Ecosystem
  • Succession the process by which one community
    is replaced by another until a stable community
    occupied the area.
  • A forest fire is an example of succession.

Changes in the Ecosystem
  • Lichens and mosses will establish themselves in
    an ecosystem quickly.
  • As plant and animal matter decomposes over time,
    nutrients are added back into the soil.
  • Producer makes food
  • Consumer eats other plants and animals
  • Decomposer breaks down decaying plant and
    animal matter.

Repairing the Ecosystem
  • Reclamation repairing some of the damage to an
  • Many times people can help repair and improve

Preserving the Ecosystem
  • Conservation careful management and wise use of
    natural resources.
  • Reduce use less
  • Reuse use it again
  • Recycle make the old into new
  • Redesign change a product to use fewer
    resources to make it.
  • Preservation protection of an area
Write a Comment
User Comments (0)