24.Species interactions - competition Fall 2007 skeleton

24.Species interactions - competition Fall 2007 skeleton -...

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1 Final Dec 11 12:20-2:10 Discussion Forum – Human Population Growth – now opened (until April 9) 2 bonus pts. For participation
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2 So far, we’ve seen that … Populations don’t grow exponentially forever Population growth is function of density (e.g., 1-N/K) Increasing density implies competition among individuals of the same species Intraspecific competition – competition among individuals of the same species
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3 Intraspecific Competition
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4 But, individuals don’t just interact with only individuals of the same species Predator-prey interactions – wolves and moose Competition among plants species – light, nutrients, moisture, pollinators
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5 Community ecology … Community – assemblage of species in the same place at the same time How interspecific interactions affect diversity (number of species) and abundances
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6 How Can We Organize Interactions? Interaction Effect on Sp. A Effect on Sp. B Competition Negative (-) Negative (-) Consumer- Resource (predator/prey;host/para.) Negative (-) Positive (+) Mutualism Positive (+) Positive (+) Commensalism or Amensalism Positive (+) or Negative (-) None (0)
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7 Interspecific Competition Is Traditionally Viewed as Strong Force Organizing
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This note was uploaded on 04/02/2008 for the course BIO 187 taught by Professor Douglasgreen during the Spring '07 term at ASU.

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24.Species interactions - competition Fall 2007 skeleton -...

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