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Environment

Terms to Know

QuestionAnswer
Populations All the individuals of a species that inhabit a particular place at the same time
Genetic Diversity The sum of the different genes and gene combinations found within a single population of a species and across populations of the same species
Population Density The number of individuals inhabiting some defined area
Carrying Capacity The number of individuals in a population that an environment can support long term
K-selected Species Organisms with populations that generally stabilize close to their carrying capacity and are often regulated by density dependent factors (Whales, bears, wolves, gorillas)
r-selected Species Organisms with populations that generally fluctuate widely in size; subject from catastrophic mortality from harsh weather, fires, and other density independent factors (Mice, rabbits, dandelions, cockroaches)
Infraspecific Competition Competition among individuals of the same species
Interspecific Competition Competition among individuals of different species
Invasive Species An introduced species that poses a serious threat to native populations
Biodiversity Hotspot A region that supports at least 1,500 endemic plant species, approximately 0.5% of the world total, and that has been reduced in area by at least 70%
Keystone Species Species with substantial influence on community structure, despite its low biomass or #s relative to other species; the influence of these species is often exerted through feeding activities; usually toplevel predators sea stars, sea otters, jaguars
Umbrella Species Species whose protection provides protection for the entire ecosystem on which that species depends
Flagship Species Species that attracts and sustains human interest in protecting ecosystems
Demography The statistical study of populations, generally human populations, including their density, growth, age structure, birthrates, and death rates
Created by: jae_moore