Individuals, Communities and Populations Flashcards
name the 3 levels of ecosystem organisation
individual, population and community
are a population and a species the same thing
no, species can have varying populations within them depending on certain characteristics
name some of the key biological processes for populations
growth, metabolism, activity, thermoregulation and reproduction
what are the two ways of population control
density-dependent and density-independent
what is primary succession
the beginning step of ecological succession where species known as pioneer species colonise an uninhabited site
what is secondary succession
destruction of existing vegetation which eliminates species
give some examples of dispersal within species
travel, settlement or departure from an area
describe migration
the regular and directional mevement of individuals between two locations
give the 4 stages of succession
colonisation, development, mature and climax
what is the difference between fundamental and realised niches
fundamental: conditions in which communities COULD survive
realised: conditions in which comunities ACTUALLY survive
is there are more habitat niches what happens to biodiversity
it increases
what is spatial variation
increased niche availability
within ecological niches what is success dependent on
some advantage to access different resources compared with others
what is temporal variation
increased niche availability
what must be available for coexistence to occur
broad distributions and abundant nutrients
