The eastern screech owl (Megascops asio) roosts in tree cavities. As long as there are enough tree cavities available for all the owls in the population, the number of tree cavities has no effect on per capita birth or death rates. If there are more owls than the number of tree cavities, the per capita death rate increases with increased population size (because of increased rates of predation or death by exposure). How does this scenario differ from the traditional idea of density-dependent population regulation, as described by Nicholson (1956) or Turchin (1995)? Does it make more or less sense, and why?

The eastern screech owl (Megascops asio) roosts in tree cavities. As long as there are enough tree cavities available for all the owls in the population, the number of tree cavities has no effect on per capita birth or death rates. If there are more owls than the number of tree cavities, the per capita death rate increases with increased population size (because of increased rates of predation or death by exposure). How does this scenario differ from the traditional idea of density-dependent population regulation, as described by Nicholson (1956) or Turchin (1995)? Does it make more or less sense, and why?

Biology Today and Tomorrow without Physiology (MindTap Course List)

5th Edition

ISBN:9781305117396

Author:Cecie Starr, Christine Evers, Lisa Starr

Publisher:Cecie Starr, Christine Evers, Lisa Starr

Chapter16: Population Ecology

Section: Chapter Questions

Problem 2DID

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