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place where Darwin observed the remarkable series of related but distinct forms of life
Essay on the Principle of Population; Plants and animals tend to increse geometrically, while food source increase arithmetically
5 species; insect - consumers; 4 species have bills suitable for eeding on insects; one carries a twig/cactus spine to probe for insects
major terrestrial assemblages of plants, animals, and microorganisms that occur over a wide geographical areas that have distinct physical characteristics
species living in the same geographic area avoid competition by occupying different portions of the habitat, or by consuming different food or other resources
the changes that evolve in two species to reduce niche overlap- to lessen the degree to which organisms compete for the same resources
realize rate of population increase (r)
the number of individuals added to the population minus the number lost from it
number of individuals added to a population (new inidividuals entering and residing with a population)
r=(birth + immigration) - (death + emigration)
equation forr the realize rate of population equals the number of individuals added to a population minus the number of individuals leaving a population
population growth rate (rN)
r is the realized rate of population and N is the number of individuals in the population
sigmoid growth curve
a period of exponential growth; population approaches its environmental limits, growth slows and finally stabilizes, fluctuating around the carrying capacity of the environment
r - selective adaptations
large number of offspring, no parental care, rapid growth, short life span
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