B2d-interdependence Flashcards
what is interspecific competition?
when organisms compete for resources against individuals of another species
what is intraspecific competition?
when organisms compete for resources against individuals of the same species
why is intraspecific competition often more significant?
individuals of the same species have exactly the same needs
what is an ecological niche?
how a species fits in to its ecosystem.
it depends on things like where the individuals live and what they feed on
what happens to prey when predators increase?
prey will decrease
what happens to predators when prey increases?
predators will increase
why are predator and prey population cycles are out of phase with each other?
it takes a while for one population to respond to changes in the other population
eg reproduction
what are the two types of interdependence between organisms?
parasitism
mutualism
what is paratism?
where the parasite benefits to the living hosts detriment, including fleas and tapeworms
what is mutualism?
where both species benefit including cleaner species and pollination by insects
why is nitrogen fixing bacteria in the root of leguminous plant an example of mutualism?
the bacteria get food from the plant
the plant gets nitrogen compounds from the bacteria to make into proteins
how does the the interdependence of organisms determines their distribution and abundance?
some organisms depend entirely on other species to survive
abundance- population size
what are examples of paratism?
tapeworms absorb nutrients from the host
fleas
what are examples of mutualism?
-oxpeckers(cleaner species) live on buffalo oxpecker gets food buffalo gets pests removed -plants pollinated by insects plants reproduce insects get nectar
