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29 Cards in this Set

  • Front
  • Back
ECOSYSTEM
division of the biosphere consisting of all the biotic and abiotic factors that surround organisms and affect their way of life
BIOTIC
FACTORS
living organisms
ABIOTIC
FACTORS
physical features such as:
water, sunlight, rainfall, temperature rocks, soil type, humidity, elevation
ECOLOGY
the study of the interactionsof organism with one another and with their physical surroundings
BIOSPHERE
the part of the Earth in which life exists
COMMUNITY
organisms living together
ECOLOGICAL SUCCESSION
an existing community of orgaisms is replaced by a different comunity over periods of time
BIOME
an enviornment that has a characteristic climax community
CLIMAX
COMMUNITY
relatively stable collection of plants and animals that results from ecological succession
POPULATION
collection of individuals of the same species in a given area whose members can breed with one another
PRODUCERS
organisms that make their own food from inorganic substances through photosynthesis
CONSUMERS
get their energy either directly or indirectly from producers (they eat producers or organisms that eat the producers)
ENERGY CYCLE
energy flows through an ecosystem from the sun to producers to consumers
NOT RECYCLED
NUTRIENT CYCLE
nutrients are recycled in an ecosytem
DECOMPOSERS
organisms that obtain their energy from non-living organic matter
examples: bacteria & fungi
ECOLOGICAL
PYRAMID
represents the energy relationships amoung trophic levels
LIMITING FACTOR
something that limits the growth of a population of organisms
FOOD CHAIN
series of organisms through which food energy is passed in an ecosystem
FOOD WEB
complex relationship fromed by interconnecting and overlapping food chains
DENSITY-
DEPENDENT
LIMITING
FACTORS
factors that control population size in large populations
competition, predation, parasitism, crowding & stress
CROWDING
AND
STRESS
animals need a certain amount of space, when that is limited they may fight, have lower birth rates
PARASITISM
parasites live off their hosts, weakening them and causing disease
PREDATION
one animals eat another animal
COMPETITION
organisms compete, or struggle with one another for resources (food,space,water
DENSITY-
INDPENDENT
LIMITING
FACTORS
natural occurances, such as weather, which controls the growth of populations of organisms
COMMENSALISM
one organism benefits and the other is not harmed
example: barnacle & whale
example: shrimp & sea anemone
MUTUALISM
both organisms benefit from the relationship of living together
example: clownfish & sea anemone
PARSITISM
one organism benefits at the expense of the other

example: roundworm & dog
CARRYING
CAPACITY
size of a population during the steady rate portion of a logistic growth curve
maximum # of animals an ecosystem can support