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- 3. A 1998 study of grizzly bears in the Kananaskis area estimated the population size at 48 to 56 individuals. The study area encompassed 4000 hectares. a) Use the values to determine maximum and minimum density estimates for the population.6 of 6 32. Ecosystems will have a greater chance of being stable over a long period of time if they have A. organisms imported by humans from other environments B. a sudden change in climate C. a diversity of organisms D. predators eliminated from the food chains 33. Which of the following is NOT a way that humans can protect biodiversity? A. Developing state parks B. Buying products that aren't sustainably sourced (palm oil, coffee, chocolate, etc...) C. Legally protecting endangered species to preserve biodiversity D. Regulating hunting and fishing 34. A wooded area has been divided by a housing development and is threatening the biodiversity of the area. What term is used to describe this threat from human activities? A. habitat fragmentation B. acid precipitation C. habitat augmentation D. global warming 35. Which of the following is NOT a characteristic of an invasive species? A. They grow rapidly and outcompete with other plants or animals B. They produce large numbers of seeds…2) Explain the immediate and secondary effects of removing otters from a kelp forest ecosystem. (use the word: keystone species, biodiverse/biodiversity)
- 1. Differentiate between a dominant and a keystone species.2. What is the advantage of species diversity indices over species richness?1. Develop a sampling method/design to measure the sample size species richness of the invertebrates of 6 kilometers coastline. Use the Slovin's Formula to find the sample size.1. Complete the following table describing the effect of different types of species interactions on the two interacting species. For the effect column, you can write out the words, or use a symbol [positive (+), negative (-), neutral/no effect, (0)]. Effect on Effect on Type of interaction Example Species A Species B Parasitism Mutualism Herbivory Competition Commensalism Predation
- 1. Hunting is one way of reducing population size. Wildlife managers closely watch changes in population numbers of all wildlife species in order to determine legal hunting ‘bag limits’ for each hunter. Depending on changes in population size, hunting bag limits are changed from year to year. In each of the following scenarios, suggest what changes might have occurred in the population in the previous year to warrant these changes in bag limits. (Address all four factors that affect population size.) a.) The mallard duck bag limit has increased from four ducks/day to eight ducks/day. b.) The previous year 1 female black bear could be taken, and up to 3 males could be taken. This year no females can be taken.1. What do the following terms mean?(a) the Community,b) population,c) ecological niche4. There was a fish kill because of the higher temperature below the water. * density-dependent limiting factor density-independent limiting factor
- 3. Compare the definitions between density-dependent factors and density-independent factors. Give examples for each. ✓ ✓ ✓ ✓ Density-Dependent Factors: Example: Density-Independent Factors: Example:1.Give similarities and differences between the following: a. ecologist vs. environmental scientist b. ecologist vs. environmentalist c. ecology vs environmentalism1. Compose an essay to explain what is an ecological environment of an organism. You may include the meaning of the following terms: population, community, niche, species, habitat, biotic and abiotic factors, limiting factors and interactions.