Chap.6 Interspecific competition

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Chap.6 Interspecific competition
Essentials of Ecology 3rd. Ed.

• ??? (Ayo)
• ?????? ???????
• ?????? ??? (2008)

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Interspecific competition

• 6.1 introduction
• 6.2 Ecological effects of interspecific
  competition
• 6.3 evolutionary effects of interspecific
  competition
• 6.4 interspecific competition and community
  structure
• 6.5 how significant is interspecific competition
  in practice?

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Interspecific competition

• 6.1 Introduction
• Intraspecific competition
• Interspecific competition
• The ecological and the evolutionary effects of
  interspecific competition
• 6.2 ecological effects
• 6.3 evolutionary effects
• 6.4 community structure
• 6.5 significant

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6.2 ecological effects

• 6.2.1 Competition between diatoms for silicate
  (Fig. 6.1)

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• Fig. 6.1 competition between diatoms.

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6.2.2 coexistence and exclusion of competing
salmonid fishes (Fig. 6.2)

• (a) frequency of aggressive encounters

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• (b) foraging frequency

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• (c) specific growth rate in length. Different
  letters indicate means are significantly
  different from each other.

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6.2.3 some general observations

• Fundamental niche is the combination of
  conditions and resources that allow that species
  to exist, grow and reproduce when considered in
  isolation from any other species that might be
  harmful to its existence.
• Realized niche

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6.2.4 coexistence of competing diatoms (Fig. 6.3)
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6.2.5 coexistence of competing birds

• Percentage difference in feeding rates. Where
  the other species had been experimentally
  removed.
• During incubating (inc)
• During nestling period (nstl)

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6.2.6 coexistence of competing rodents and ants
(Fig. 6.5)

• The diets of ants and rodents overlap sizes of
  seeds harvested by coexisting ants and rodents
  near Portal, Arizona.

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6.2.7 the competitive exclusion principle
(Gause