ORGANISMS AND THEIR ENVIRONMENT - PowerPoint PPT Presentation

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ORGANISMS AND THEIR ENVIRONMENT

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Chapter 2 SECTION 1 ORGANISMS AND THEIR ENVIRONMENT Ecology is the study of interactions between organisms and their environment. Ecology combines the science of ... – PowerPoint PPT presentation

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Title: ORGANISMS AND THEIR ENVIRONMENT


1
Chapter 2
  • SECTION 1
  • ORGANISMS AND THEIR ENVIRONMENT

2
Ecology is the study of interactions between
organisms and their environment. Ecology
combines the science ofbiology, chemistry,
physics, geology and others. Ecology involves
the interaction of the biotic and abiotic
factors
3
Biotic and Abiotic Factors
  • Biotic factors are all living things that inhabit
    an environment
  • Abiotic factors are all non living things that
    inhabit an environment.

4
Levels of organization
Biosphere
Biosphere
Ecosystems
Communities
Populations
Organisms
5
Levels of Organization
  • Biosphere The portion of the Earth that
    supports life.
  • Ecosystem populations of plants and animals
    that interact with each other in a given area and
    with the abiotic components of that area
  • Communities All the populations of different
    species that live in the same place at the same
    time
  • Population A group of organisms, all of one
    species, which can interbreed and live in the
    same place at the same time
  • Organism An individual living thing that is
    made of cells, uses energy, reproduces, responds,
    grows and develops

6
Biotic Factors
  • Living things are adapted to their environment
    and impact their community
  • Abiotic Factors
  • Changes in abiotic factors can change environment
  • No rain can lead to drought.

7
Where and How Organisms Live
  • Niche - the role a species plays in its community
  • Habitat - the place where an organism lives out
    its life

8
Survival Relationships
  • Predator-prey Predators seek out and eat other
    organisms
  • Symbiosis A relationship in which there is a
    close and permanent association between organisms
    of different species. Three type of symbiosis
    include
  • Mutualism (/)
  • Commensalism (/0)
  • Parasitism (/-)

9
Mutualism
  • Symbiotic relationship in which both species
    benefit.

10
Commensalism
  • A symbiotic relationship where one species
    benefits and the other is neither harmed or
    helped.

11
Parasitism
  • A symbiotic relationship in which one organism
    benefits at the expense of the other.

TrichinellosisTrichinella spiralis
12
Survival Relationships
  • Mutualism is a symbiotic relationship in which
    both species benefit. (/)
  • Commensalism is a symbiotic relationship in
    which one species benefits and the other is
    neither harmed nor benefited. (/0)
  • Parasitism is a symbiotic relationship in which
    one species benefits and the other is harmed
    (/-)

13
Survival Relationships
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