population ecology Flashcards
population ecology:
figure out why are some species more vulnerable to extinction than others
how can current rates of survival and reproduction be projected into the future?
What challenges do we face with current human population growth?
the dynamics of species populations and how these populations interact with the environment
population ecology:
figure out why are some species more vulnerable to extinction than others
how can current rates of survival and reproduction be projected into the future?
What challenges do we face with current human population growth?
the dynamics of species populations and how these populations interact with the environment
Population: a group of ______ of a _____ species living in the same _____
Population: a group of individual of a single species living in the same general area
Population density: ______ of ______ per unit area or volume
Population density: number of individuals per unit area or volume
Population ecology: how ______ and _____ factors influence populations(____,_____,_____)
Population ecology: how abiotic and biotic factors influence populations(density, distribution, size age structure)
An organism’s life history comprises the ______ that affect its ______ of _____ and ______
the _____ at which reproduction begins
how _____ the organism reproduces
how _____ offspring are produced per reproductive episode
what limits can the number of offspring and individual have? sex cells time for development space social structure (parent numbers)
An organism’s life history comprises the traits that affect its schedule of reproduction and survival
the age at which reproduction begins
how often the organism reproduces
how many offspring are produced per reproductive episode
what limits can the number of offspring and individual have? sex cells time for development space social structure (parent numbers)
________-reproduce one and dies:
salmon
many flies
\_\_\_\_ offspring low probability of survival at the young age \_\_\_\_\_ lifespan \_\_\_\_ energy investment r-selected
semelparous-reproduce one and dies:
salmon
many flies
many offspring low probability short lifespan small energy investment r-selected
\_\_\_\_\_\_\_-reproduce several times few offspring per reproductive event high probability of survival at young age long lifespan large energy investment per offspring
k-selected (more likely to extinct)
tortoises
iteroparous-reproduce several times
k-selected (more likely to extinct)
tortoises
female makes______ but has more materials
female makes few egg but has more materials
logistic-more flat-leveling out is sustainable
logistic-more flat-leveling out is sustainable
exponentially can’t grow forever-competition
exponentially can’t grow forever-competition
k=________, numbers of individuals that the environment sustain
k=carrying capacity, numbers of individuals that the environment sustain
______-maximum population size the environment can support, determined by limit factors
carring capacity-maximum population size the environment can support, determined by limit factors
density-dependent factors (_____,______,_____)
influence the number of individuals a _____pop.density
density-dependent factors (disease,food)
influence the number of individuals a population can sustain and varies with pop.density
density-independent factors (_______)
influence the number of individuals a population can sustain and does _____ with pop.density
density-independent factors (weather)
influence the number of individuals a population can sustain and does not vary with pop.density
_______ cannot indefinitely grow _______. _______ (K) is the _______ population size an environment can support and may be based on _________ and ___________ limiting factors.
populations cannot indefinitely grow exponentially. Carrying capacity (K) is the maximum population size an environment can support and may be based on density dependent and density independent limiting factors.
