Quiz 4 Ch 11 Flashcards
geometric growth (lambda)
when generation don’t overlap
exponential growth
continuous population growth in UNLIMITED ENVIRONMENT can be modeled exponentially
when resources are depleted
population growth slow and stops
carrying capacity
max # individual that can be sustained by available resources
finite resources lead to
finite number of individuals
max carrying capacities cause
environmental resistance to growth
environment limits population growth by
altering birth and death rates
density depending factors
abiotic factors like natural disasters
cause carrying capacity to not be stable in its variant
case study : Galapagos finch population growth
normally a numerically dominant finch that eat seeds and caterpillars
but the population fell during the drought due to lack of seed to produce foods
cast study: cactus finch and cactus reproduction
finches decrease their food supply by destroying their destroy stigmas not allowing flowers to fertilize
negative impact on cactus by El Nino
abiotic and abiotic factors.
cactus absorbs too much water making the roots not able to sustain the weight.
sea salt spray causes osmotic stress.
grew vines that smothered cactus
organism with high intristic rate of increase
small organism have a higher rates of per capita increase and more variable population
per capita increase
more potential for growth due to relationship between body size and potential growth
case study: population growth of marine tunicate by small marine invertebrates
due to phytoplankton population reproductive rates.
the higher the reproductive rates the faster there population response
case study: growth of whale populations
annual migration counts was 2.5% growth rate.
decrease due to subsistence whaling.
increased when whaling stoped
