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Ecology..2

ecology unit 2. chps 14,15,16

QuestionAnswer
The number of organisms of one type of species that the environment can support carrying capacity
limiting factor that has as increasing effect as population increases density-dependent factors
limiting factor that affects all populations regardless of size density-independent factor
Give examples of density-dependent factors disease, competition, parasites, food, space
Give examples of density-independent factors temp, natural disasters, habitat disruption,
In what type of system does the population fluctuate around the carrying capacity? open system
What is the equation for population density? D= Number of organisms/area
What is the equation for population change over time? Rate= change in population size/period of time
the study of human populations demography
the number of offspring the female has during her reproductive years fertility rate
A collection of several populations that inhabit a common environment communities
orderly, natural changes and species replacements that take place in the communities of an ecosystem succession
What are the 2 types of succession? primary and secondary
the first species to colonize an ecosystem after a disruption pioneer species
a stable mature community that does not go through much change climax community
gradual growth of an ecosystem over a long period of time (occurs after lava flow or glacier retreat) primary succession
succession that occurs after a community is disrupted by natural disasters or human activity (fire flood) secondary succession
list the steps in primary succession bare rock, grassland, shrub, coniferous forest, deciduous forest
list the steps in secondary succession grassland/weeds, shrubs, coniferous forest, deciduous forest
variety of life, measured by the number of different species biodiverstiy
How much has CO2 increased since the industrial revolution? 30%
International treaty developed by the UN in an attempt to control CO2 Kyoto protocol
Created by: trax143
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