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Transcript
CHAPTER 1 / SECTION 1
•LIVING THINGS AND
THE ENVIRONMENT!
LIVING THINGS IN THEIR ENVIRONMENT
• An organism or type of living thing
needs to obtain food, water, shelter
and other things it needs to live, grow,
and reproduce from its environment.
• An environment that provides the
things an organism needs to live is
called its habitat.
Factors in an Environment
Biotic – living parts of the environment.
Ex. Producers and consumers.
Abiotic – nonliving parts of the
environment.
Ex. water, sunlight, oxygen,
temperature, and soil.
Photosynthesis: The process of a plant
making its own food.
Biological Complexity
•
Living organisms can be
Biosphere
studied at different levels
of complexity.
•
Biome
From least to most
complex, these levels are
Ecosystem
(in an ecological context):
–
Individual / Species
–
Population
–
Community
–
Ecosystem
–
Biome
–
Biosphere
Community
Population
Individual
Populations
A species is a group of
organisms that are physically
similar and can reproduce with
each other.
Organisms do not generally live
alone. A population is a group
Migrating wildebeest population
of organisms from the same
species occupying in the same
geographical area.
This area may be difficult to
define. Why?
Tiger populations comprise
widely separated individuals
Communities and Ecosystems
• A community is all the populations that
live together in an area.
• An ecosystem is the community of
organisms that live in a particular area and
along with their nonliving surroundings.
**The community and the abiotic factors together form an
ecosystem.
Ecology
• The study of how living things interact with
each other and their environment.