14 3 Population Density And Distribution EQ How

14. 3 Population Density And Distribution EQ: How are organisms distributed in their habitat?

14. 3 Population Density And Distribution Not all organisms are spread throughout their environment in the same way. • Population density is a measurement of the number of individuals living in a defined space. • Scientists can calculate population density:

14. 3 Population Density And Distribution Geographic dispersion of a population shows how individuals in a population are spaced. • Population dispersion refers to how a population is spread in Clumped an area. dispersion • There are three types of population dispersion: Uniform dispersion • DRAW AND LABEL THESE Random dispersion

14. 3 Population Density And Distribution Clumped Dispersion

14. 3 Population Density And Distribution Uniform Dispersion

14. 3 Population Density And Distribution Random Dispersion

14. 3 Population Density And Distribution Which of the three diagrams represents uniform dispersion? A. 1 B. 2 C. 3 1 2 3

14. 3 Population Density And Distribution Which of the three diagrams represents random dispersion? A. 1 B. 2 C. 3 1 2 3

14. 3 Population Density And Distribution Which of the three diagrams represents clumped dispersion? A. 1 B. 2 C. 3 1 2 3

14. 3 Population Density And Distribution • A survivorship curve is a diagram showing the number of surviving members over time from a measured set of births. • It shows the reproductive strategies of a species.

14. 3 Population Density And Distribution • Survivorship curves can be type I, II or III. Type I —low level of infant mortality and an older population – common to large mammals and humans – Both parents generally share care for the young – Protect them to help them survive longer – Takes a lot of time and energy = high investment

14. 3 Population Density And Distribution Type II —survivorship rate is equal at all stages of life – common to birds and reptiles – The species have equal chances of living and dying, whether from disease or predation

14. 3 Population Density And Distribution – Type III—very high birth rate, very high infant mortality – common to invertebrates and plants – Parents to not take care of their young. They produce a lot of young to increase the likelihood of survival – Many will die due to predation

14. 3 Population Density And Distribution What does the graph show? A. How fast organisms die in years. B. The % of organisms that die each day. C. Survival rates of offspring over time.

14. 3 Population Density And Distribution Which survivorship curve indicates that the parents gave a lot of offspring and leave them to defend for themselves, causing high early mortality rates? A. A B. B C. C

14. 3 Population Density And Distribution Which survivorship curve indicated that the parents have high investment in the young? A. A B. B C. C