Populations and Communities. Habitat: An environment that provides an organism with everything it needs to live, organism with everything it needs to.

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Presentation transcript:

Populations and Communities

Habitat: An environment that provides an organism with everything it needs to live, organism with everything it needs to live, grow and reproduce.

What do organisms need to live, grow,and reproduce ? What do organisms need to live, grow,and reproduce ?

Food

Water

Space Space

Shelter

Habitat: An environment that provides an organism with everything it needs to live, grow and reproduce

Organisms live in different environments because they have different requirements

An organism interacts with living and nonliving parts of the environment

Interaction: How organisms in an ecosystem relate to one another

Biotics Living parts of a habitat

Includes: Plants,Predators, Prey, Decomposers

Abiotic Any nonliving part of the environment

Water Required by all organisms Required by all organisms Used to carry out life processes Used to carry out life processes Makes up a large part of body Makes up a large part of body 65% of our body 65% of our body Also used in photosynthesis Also used in photosynthesis

Sunlight Needed for plant growth Needed for plant growth Photosynthesis Photosynthesis

Oxygen

 Required by most living things  Help them carry on life processes  Land organisms receive from air  Water organisms get dissolved O 2 from water

Temperature

 The temperature of an area  Determines the type of organism that lives there  Some animals alter their environments or their habits to survive very hot or very cold  Dig holes in ground  Hunt at night

Soil

Mixture of :  Rock fragments  Nutrients  Air  Water  Decaying Organisms

Levels of Organizations SpeciesPopulationsCommunities

Species

Group of organisms that are physically similar, can mate and produce offspring

Populations

All the members of one species in a particular area

Communities

All of the different populations that live together in an area

Ecosystem:The community of organisms that live in a particular area and their nonliving surroundings

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