BIOLOGY 3SS3 Lecture Notes - Lecture 4: Population Ecology, Habitat Destruction, Overgrazing
10 Mar 2015
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We could write dn/dt = (b d)n , or dn/dt = rn . Do an algebraic calculation with units, and work out the answer with a calculator or calculator program. N (t) = n0 exp(rt). t = loge(n (t)/n0)/r. t = loge(50 indiv/120 indiv) Most likely would be habitat destruction by humans. Overgrazing is unlikely to cause gradual decline over so many years, and it"s hard to think of likely competitors: two competing y populations are introduced to mcmaster campus. They each breed once a year, and adults die after breeding. We convert the numbers given to unitless values of by using the sex ratio. Formally using units, we multiply each of the o spring numbers (indiv/female) by 1female/2indiv to obtain unitless values. Since we have closed the loop, we can think of these unitless values either as representing females per female, or individuals per individual.
