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30 Cards in this Set

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  • Back
population
consists of all th individuals of a particular species in a particular place
inbreeding
breeding practice which can result in a loss of diversity within a population
carring capicity
the maximum # of individuals an eviornment can support over a long period of time. When reached there in an increase in competition for species survival need suchs as food, shelter, mates, exc
density independent
factors such as weather, floods, and firs that do not affect populations
mutalism
cooperatve relationship which benefits both species
competitive exclusion
principal that described the elimination of 1 species over another due to competition for the same limited resourse.
theory of competitive exclusion assosiated with...
G. F. Gause
mimicry
a harmless species resembles a poisonous or distasteful one
omnivore
feeds on both producers and consumers
biomass
dry weight of organic material in an ecosystem
food chain
single, linear pathway, beginning with producers, of the feeding relationship and energy transfer among organisms in an ecosystem
trophic level
feeding level of an ecosystem
el nino
disruption of normal air and water currents resulting in unusual weather patterns ad the cut off od nutrients to aquatic life
detritvore
decomposers that feed on decaying plants and animals
exponental model
population growth that increases rapidly while birth and death rates are constant
succession
gradual, sequential replacement and regrowth of a pop in an area
ecology
study of interactions or organisms with each other and their enviornment
symbiosis
2 or more species living together in a close long term assosiation
biomes
major terrestrial ecosystems located in different areas defined by climate and specific kinds of plants and animals
CFC's
destroy ozone
nitrification
stage in the nitrogen cycle where bacteria in the soil take up ammonia and form nitrates
carbon cycle
process which circulates carbon through the biosphere in photosynthesis and respiration
abiotic facors
nonliving phyical and chemical characteristics of the enviornment
niche
role a species plays in its enviornment
biogeochemical cycle
process by which materials necessary for organisms are circulated through the biosphere
density- dependent factors
factors such as food shortages and living space that can affect populations
characteristics of mammals
1.hair covered body
2. viviparous
3. milk from mammary glands for young
diaphram
breathing muscle which seperates thoratic cavity from abdominal cavity and aids in breathing
# of chambers in mammal heart
4
major characteristics for mammal classification
1.morophology
2.reproduction
3.nutrition