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Consider ecological efficiency and energetic hypothesis, why are there few lions than wildebeest in africa ?
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- Why are there so few lions compared to wildebeest in africa? Explain this in terms of ecological efficiency and energetic hypothesisIn any scientific paper, the Discussion is often the most hard-hitting, and where researchers elaborate and explain their results in the context of their experiment and the real world. Explain why when researchers tried culling some of the elk herd it did not have trophic effects, while reintroducing wolves did have trophic effects.According to the web article 'Evolution in real time', Dr. Richard Lenski's colleagues began to notice their newly acquired energy-obtaining capacity after about generations: 2 20 200 2,000 20,000
- Suppose you spot two species of birds feeding side by side, eating seeds from the same plant. You begin to wonder whether competition is at work. Describe how you might design scientific research to address this question. What observations would you try to make at the outset? Would you try to manipulate the system to test your hypothesis that the two birds are competing? If so, how?Need help Multiple choice Fewer than 3% of animals engage in direct care of their offspring. When might the benefits of parental care outweigh the costs? Choose the correct option and Explain why you choose that answer. a) All of the options. b) Species that feed on resources with high foraging effort (e.g., smaller insect prey versus larger insect prey). c) Species with highly immature young, for instance those with large brains that have long learning periods. d) Species with limited breeding opportunities.How would short term advantage differ from the advantages of using a long term perspective in managing our resources?
- Which organisms in the diagram have the largest total energy to give to other organisms? hawk shrew E.M. Collins 2001 marsh grass grasshopper Cattails and Marsh Grass O Hawks and Snakes O Crickets and Grasshoppers O Shrews and Frogs cricket snake frog cattail. Simulations 4-6 had lower density of birds (more spacing), how did this influence their ability to escape predation? With more spacing, which number of Junco’s was most advantageous (4, 8, and 16)? Ecologically explain this result. If this flock of birds occurred in an area with low food availability what flock density would you predict? Explain how food availability impacts flock size/competition. Was there a relationship between prop. Vigilance (proportion of birds looking up right before Hawk attack) and the rate at which they escaped predation? Was there a relationship between Mean vigilance (average number of birds looking up each tick) and the rate at which the Junco’s the escaped predation? Was there a relationship between Mean vigilance and the number of birds in the flock?Number of offspring a jaguar can have (its biotic potential)?
- A niche is loosely defined as an organism's role in its environment, which can include factors such as feeding preference, nesting behaviors, mating behaviors, method of obtaining prey, and local habitats. Keeping Gause's law in mind, do some research on the California red-legged frog and the North Pacific tree frog (use wiki or another Google search). Create a chart comparing the two with respect to their niche or lifestyle that can explain how these two frogs can co-exist in the same ecosystem.Decribe Brown’s large granivore experiment and what was his hypothesis (Chapter 13)? Why did Brown’s research team create controls by completely fencing study plots and then cutting holes in their sides to allow free passage of rodents into and out of the plot? Why not just compare the density of small rodents in the large granivore removal plots with their densities in the surrounding desert? Why did they look at insectivores and what did the lack of response in insectivores indicate? Why did they repeat their large granivore experiment?Great white sharks prefer marine mammals like seals but can eat a number of other prey items, including birds and fish. According to the table below, what is the critical search time for seals, above which great white sharks should choose to eat an albatross if they encounter one? Prey item: seal (energy = 60 Mcals, handling time = 5 minutes) Prey item: albatross (energy = 10 Mcals, handling time = 2 minutes)
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