Population Growth and Interactions Flashcards
-what is a population
-what does studying individuals in a population provide information on
-what does it not give us information on
-what is a community
-what is a ecosystem
-group of individuals of same species occupying the same area at same time
-tells us life span, food preferences, repro cycles
-how they interact between populations
-populations of all organisms in an area, how different populations interact with eachother
-includes the community and abiotic factors
-what is INTRAspecific compeitition
-what is INTERspecific competition
-what is a geographic range
-what is a habitat
-what is a ecological niche
-how members of one species interact with each other
-how different populations interact with each other
-reigion where a organism is sighted (Alberta)
-physical area where the species lives (Calgary)
-the role of the species
What must a STATEMENT of a size population include?
-what are the 4 things data is collected for?
-number of organisms, location, time
1. population density
2. population growth
3. rate of growth
4. change in size/ per capita growth rate
- Population density
-what is it
-number of organisms (N) in a area or volume
- Rate of growth
-what is it
-population explosion vs population crash
-speed at which change occurs in population size
-explosion is when invasive species may form a fast growing population
-this may cause another population to crash or decline
- Population growth
-what 4 processes change the size of population
-what formula can be used
-what is dynamic equilibrium
-open vs closed population
-natality, mortality, immigration, emigration
-Delta N = (b+i) - (d+e)
-when a population remains stable over time and balanced adjusting to change
-open population allows change through birth, immigration, death, and emmigration, while a closed one has no migration due to barriers so only birth and death
- Change in size
-what is it expressed as
-rate of change per individuals or per capita growth rate
