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Ecosystems
Organisms and Environments
Lesson 1
TEKS 5.9A, 5.9C, 3.9A, 3.9C
Oh, Deer!!!!! Game!!!!!!!
• Living things depend on each other and on the nonliving things in their environment in order to thrive.
• Changes in the environment cause changes to living organisms.
Habitat
• The specific environment where an organism lives.
tree
pond
soil
meadow
river
Species
• A group of organisms that can produce offspring that are like themselves
Population
• All the organisms of the same species that live in the same area at the same time.
Community
• Populations of different species that live in the same area at the same time.
Nonliving things:SoilWaterOxygenCarbon DioxideSunlight
Living things:
PlantsAnimals
Ecosystem
Ecosystem: all the populations of organisms and the Nonliving things in an environment, and the interaction amongthem.
Can be small (pond). Can be large (desert).
Special Ecosystems
Biome
• One of the six major land areas of the world that is home to specific plant and animal populations and is defined by its climate.
Tropical Forest
• Warm temperatures
• Rainy climate
• Many trees and other plants
• Many animals
Have you seen Tarzan?
Desert
• Very little rainfall or snowfall
• Can be hot temperature or cold temperature
• Few plants or animals
Have you seen Rango?
Grasslands
• Mostly flat land
• Covered with tall grasses
• Few trees
• Warm climate
• Not as dry as desert
Have you seen Dances with Wolves?
Deciduous Forest • Has four seasons• Warm summer and Cold winter• Trees lose their leaves in autumn• Many plants and animals
QuickTime™ and a decompressor
are needed to see this picture.
QuickTime™ and aCinepak decompressor
are needed to see this picture.
Taiga• Evergreen forest: fir and pine trees
• Long, cold winter
• Short, mild summer
• Elk, moose, bears, are some animals
QuickTime™ and a decompressor
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Have you seen Open Season?
Tundra• Flat, open ground• Always frozen and cold all year long• Few plants: mosses, lichens, shrubs• Too harsh for trees• Polar bears, arctic hares, arctic fox, musk ox
QuickTime™ and a decompressor
are needed to see this picture.
Vocabulary• Habitat: the specific environment where an organism lives• Species: a group of organisms that produce offspring like
themselves• Population: All the organisms of the same species that live in
the same area at the same time• Community: Populations of different species that live in the
same area at the same time• Ecosystem: all the populations of organisms and the nonliving
things in an environment, and the interaction among them
• Biome: One of the six major land areas of the world that is home to specific plant and animal populations
and is defined by its climate• Drought: a period of very little rainfall• Flood: an overflow of water onto land that is normally dry• Thrive: to grow in a strong and healthy way• Perish: to die