EXAM 2 review - Bio 1510 Exam 2 1 Carrying Capacity o In a...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
B i o 1 5 1 0 E x a m 2 1 Carrying Capacity o In a population at its K, the birth rate equals the death rate Rate of Immigration is high when the number of species is low because the first colonists to arrive are all “new” species If the number of species on the island is S+3, we would expect to see on average, three more species go extinct than those that invade Primary production is highest in zones of upwelling because the water in these areas has a greater concentration of nutrient. The gas that is removed from the atmosphere by plants and algae is CO 2 Determining equilibrium species number of an island: o Important: Island Size, Distance to Mainland, Size of the mainland, Direction of prevailing winds and currents o Not important: Distance to other islands Smallest-Largest Equilibrium species number: o ISF, small island, far from species pool o ISN, small island, near species pool o ILN, large island, near species pool Logistic Model for Population Growth: o Members of Population compete for resources at high density; all individuals have the same effect on population growth; there is no time lag between birth and the time an organism begins to affect population growth; the environment imposes a carrying capacity on the population o NOT an assumption: Population growth rate increases as the size of the population approaches the carrying capacity The growth rate of a population in an unlimited environment o Is equal to (b-d)N A straight-line relationship with a negative slope between age and percent of survival describes a survivorship pattern in which the probability of death is about the same for all ages The logistic growth equation describes a population that grows rapidly at small sizes, but whose growth rate slows and eventually stops as it reached the number the environment can support A single bacterium put in an environment with unlimited resources and no competition would reproduce exponentially In a life table, the number of individuals alive at the beginning of the 1-year to 2-year age interval is 800. During this interval 200 individuals die. The death rate for this interval is 0.25 A population such as Sweden’s, which has a low birth rate and low death rate, will have a relatively even distribution of individuals of different ages. Barnacles:
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 04/29/2008 for the course BIO 1510 taught by Professor Unknown during the Fall '07 term at Georgia Institute of Technology.

Page1 / 3

EXAM 2 review - Bio 1510 Exam 2 1 Carrying Capacity o In a...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online