Population biology - доклад по биологии

  • Тип: Доклад
  • Предмет: Биология
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  • Автор: Vladimir
  • Программа: Microsoft Office Word
  • Дата: 23 апр 2005
  • Формат: DOC
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Тезисы:

  • The density depends on a trophic level on which there is a population.
  • Reproductive opportunities of population depend on its life expectancy.
  • Life expectancy of individuals of a population can be estimated, using curve survivals.
  • In such populations the mortality rate coefficient exceeds factor of birth rate.
  • The important factor in the change of the population numbers is the parity of sexes.
  • It is also important to calculate the energy and resources spent on reproduction in the population.
  • Abiotic factors render essential influence on density of populations of animals and plants.
  • Express quantitative characteristics of a population as the whole.
  • Concept Of The Population.
  • Features Of Populations.
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