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Pop. Ecology
| Question | Answer |
|---|---|
| varity of life across all levels | biodiversity |
| process by which new species are generated | speciation |
| organismic relation with the envionment in which it lives in; rock, soil, leaf litter; organisms have different needs per different seasons | habitat |
| organisms role in its community; resource use and interaction with other organisms | niche |
| species with narrow niches | specialist |
| species that can utilize a wider variert of resources | generalists |
| number of organisms in an area at a given time; will grow with resource abundance & low natural enemires | population size |
| smallest number of individuals that would still allow a population to grow; ensuring long-term survival | minimum viable population |
| number of individuals per unit area | population density |
| sparital arrangment of organisms within an area | population distribution |
| population distribution that occurs when resources are plentiful throughout the area | random population distribution |
| population distribution that occur when individuals compete for space | uniform population distribution |
| population distribution that result when organisms seek habitats unevenly spaced | clumped population distrubtion |
| proportion of males to females; 1 to 1 ratio seen in monogamous species | sex ratio |
| The number of individuals of different ages within a population | age structure |
| kind of growth in which a population becomes proportionally largers each breeding cyle; produces a J curve when plotted over time: Occurs in nature only when a small population is small; competition is minimal, and ideal for environmental conditions | growth curves |
| every population is contained by physical, chemical, or biological factors | limiting factors |
| maximum population size that an environment can sustain; they can change | carrying capacity |
| factors that rise and fall with population density; predation, competition, and disease | density-dependent |
| factors are unaffected by population density; temperature extremes & natural disease | density-independent |
| life history theory that says secies have few offsprings but invest heavily in survival called K-selected species, found in stable environments | Type I |
| species that have few offsprings but invest heavily in survival; found in stable environments | K-selected species |
| life history theory that says speies produce many offsprings, but dont care for them, survival is due to chance, called R-selected species found in unpredictable environments | Type III |
| species produce many offsprings, but dont care for them, survival is due to chance; found in unpredictable environments | R-selected species |
Created by:
jbearden582