ecosystems Flashcards
define habitiat
the place where organisms live
define population
all organisms of one species in a habitat
define community
populations of different species in a habitat that make up a community
define ecosystems
a community plus all abiotic factors
define niche
role of species within it’s habitat
define adaptation
a feture that members of a species have that increases their chance of survival
what is the specific requirment of a niche
it can only be occupied by one species
what are the three types of adaptations
physiological
behavioural
anatomical
what are the two types of conditions that are a cause of adaptation
abiotic
biotic
how does population size vary due to abiotic factors
maximum stable capacity - all the eco system can support = carrying capacity as a result of abiotic and biotic factors
define population size
the total number of organisms of one species in a habitat
what is interspecific compertion
compertion between differemt species
why does interspecific compertion occour
over a limited resource
what is intraspecific compertion
competition within a species
in a competion graph what are 4 key terms
log phase
lag phase
carrying capacity/ stable
death
define the lag phase
where their is no increase in number of population as birth rate and death rate are equall
define log phase
population increases as birthrate outways death rate as their is plenty of resources e.g food
define carrying capacity
the maximum population size an ecosystem can support
define the death phase
where their is limited resources so death rate out ways birth rate
