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Sec. 22.1 Terms
Ecosystem—All the living and nonliving
things that interact in a particular area
Habitat—The place where an organism
lives and that provides all the needs of
that organism.
Biotic Factors —The living parts of an
ecosystem
Abiotic Factors —the nonliving parts of
an ecosystem
Sec. 22.1 Terms
• Population—all the members of
one species in a particular area
• Community – all the different
populations that live together in
an area
• Ecology – the study of how living
things interact with one another
and their environment.
HABITATS
• ORGANISMS LIVE IN A SPECIFIC
PLACE WITHIN AN ECOSYSTEM
• AN ORGANISM OBTAINS FOOD,
WATER, SHELTER AND OTHER THINGS
IT NEEDS TO LIVE GROW AND
REPRODUCE FROM ITS
SURROUNDINGS
• ORAGINSMS LIVE IN DIFFERENT
HABITATS BECAUSE THEY HAVE
DIFFERENT REQUIREMENTS FOR
SURVIVAL.
BIOTIC FACTORS
• THE LIVING PARTS OF AN
ECOSYSTEM
ABIOTIC FACTORS
• WATER—ALL LIVINGS THINGS
REQUIRE WATER FOR LIFE
• SUNLIGHT—NEEDED FOR
PHOTOSYNTHESIS
• OXYGEN-MOST LIVING THINGS
REQUIRE OXYGEN
• TEMPERATURE—DETERMINES
THE TYPES OF ORGANISMS
THAT LIVE IN AN AREA
• SOIL—INFLUENCE THE TYPES
OF PLANTS THAT LIVE IN AN
AREA. HOME TO BILLIONS OF
MICROSCOPIC ORGANISMS
POPULATIONS
• DO NOT STAY IN A CONTAINED AREA
• THE AREA OCCUPIED BY A
POPULATION CAN BE VERY SMALL
(BLADE OF GRASS) TO VERY LARGE
(THE ENTIRE PLANET.)
COMMUNITIES
• DIFFERENT POPULATIONS LIVE
TOGETHER IN A COMMUNITY
• TO BE A COMMUNITY, DIFFERENT
POPULATIONS MUST LIVE CLOSE
ENOUGH TOGETHER TO INTERACT.
ECOLOGY
• ECOLOGIST—SCIENTIST WHO
STUDY HOW BIOTIC AND
ABIOTIC FACTORS IN AN
ECOSYSTEM ARE REALTED.
SECT. 22.2 TERMS
• LIMITING FACTOR —AN
ENVIRONMENTAL FACTOR THAT
PREVENTS A POPULATION FROM
INCREASING
• CARRYING CAPACITY —THE
LARGEST POPULATION THAT AN
ENVIRONMENT CAN SUPPORT
LIMITING FACTOR
• FOOD—IF THERE IS NOT ENOUGH
FOOD FOR A POPULATION, THE
POPULATION CANNOT REPRODUCE
• SPACE—THERE MUST BE ENOUGH
SPACE IN AN AREA FOR ORGANISMS
TO LIVE AND REPRODUCE
• WEATHER—TEMPERATURE AND
RAINFALL CAN LIMIT A POPULATIONS
GROWTH
SECT. 22.3 TERMS
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NICHE
COMPETITION
PREDATION
SYMBIOSIS
MUTUALISM
COMMENSALISM
PARASITISM
PARASITE
HOST