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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