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Ecology
| Question | Answer |
|---|---|
| population growth | births+immigration-deaths-emigration |
| new population | initial population+(pg)(#years) |
| growth rate | population growth/initial populationx100 |
| two factors that increase a population are | births and immigration |
| two factors that decrease a population are | deaths and emigration |
| open populations | has all four factors acting on them |
| closed populations | have births and deaths acting on them but do not have immigration or emigration because organisms cannot move in and out |
| carrying capacity | the maximum number of individuals of a species that can be supported indefinitely by the ecosystem |
| density | refers to the number of organisms in an area |
| biodiversity | the number and variety of organisms found in a specific region |
| canopy fogging | use of non-lethal doses of insecticide to sample insect populations in forest canopies |
| quadrant sampling | sampling of several smaller pieces of a much larger area in order to obtain an accurate measure of biodiversity without studying the entire area |
| transect sampling | use of a line through the sampling area; at specific intervals, the type and number of species along the line are recorded |
| netting | fine mesh nets are used to capture birds and bats in terrestrial ecosystems, and fish and other organisms |
| habitat loss | occurs when events, due to natural disasters or human activities, alter a terrestrial or aquatic ecosystem so much that many species can no longer |
Created by:
syddj123
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