14.1Population dynamics assignment

SBI4U – Gr. 12 Biology Univ. Prep. Unit 5: Population Dynamics Name: _____________________________________ Characteristics of Populations Read textbook section & answer the following questions. Definitions Define the following terms. 1. Habitat: 2. Species: 3. Population size: 4. Population density: Population Size & Density 5. What is the equation used to calculate population density? Label the terms. 6. If there are 400 moose living in a 600ha region of Algonquin Park, what is the population density? 7. What is the difference between crude density and ecological density ?

SBI4U – Gr. 12 Biology Univ. Prep. 8. What density is represented in question #6 – crude density or ecological density? Why? 9. Redo question #6, this time accounting for a 70ha lake in the habitat. What type of density accounts for this? 10. What is population dispersion? 11. What are the 3 patterns of population dispersion? Draw a picture & give an example of an animal for each. Measuring Population Characteristics Populations are “dynamic” – they keep changing! Thus, it is hard to count numbers of animals in a population. Researchers count numbers at a specific time & estimate/predict population numbers based on these numbers. 12. Describe quadrat sampling. What type of species is this type of sampling good for?

SBI4U – Gr. 12 Biology Univ. Prep. Technology & Tracking 19. What are some examples of technology that can be used for tracking animals? Ethical Issues 20. The Canadian Council of Animal Care (CCAC) has developed 3 main guidelines for wildlife research. What are these guidelines? 21. Why is estimating wildlife population sizes important? Calculations 22. A freshwater biologist studying a population of yellow perch in a large, shallow lake found the fish scattered in reed beds over 25% of a 900 - ‐ ha area. She caught, tagged, and released 195 perch. Three days later, she resampled the lake and caught 210 fish of which 10 were recaptures. a. What is the dispersion pattern of the yellow perch population in this sanctuary? b. Estimate the population size of the yellow perch in this wildlife sanctuary, and calculate the population density. 23. For a grade 12 biology project, students decided to investigate the effects of pollution on a population of grasshoppers. The students investigated a population of grasshoppers in the 2.0 - ‐ ha school yard and in a 1.0 - ‐ ha field near a local oil refinery. Estimates of population size were used as indicators of survival. Data were collected using the mark–recapture method in which a tiny drop of coloured nail polish was used to mark captured grasshoppers. a. From the data in Tables 1 and 2 calculate the population size and density for each area. b. What conclusions can be drawn from the data?

SBI4U – Gr. 12 Biology Univ. Prep. 24. There are large wildlife populations in the Masai Mara Ecosystems of Kenya in North Africa. Some populations, like that of the elephant, are relatively stable while others, such as the giraffe, are experiencing a serious decline. a. Calculate the population density of elephants in the Masia Mara where 1800 elephants occupy a region measuring approximately 40 km by 60 km. b. What area was occupied in 1977 by the population of 5306 giraffes then having a density of 1.4 animals per km 2 ? c. Determine the population density after the number of giraffes in the same area declined to just 1050 individuals by 1998?