6+ProductivityTrophicLevels

Mutualistic partnerships with microorganisms

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Unformatted text preview: ts defending aphids seed dispersal, pollination Animals form mutualistic partnerships with… microorganisms nutritional value of plant tissue varies (fruit - cellulose & lignin) (often: symbioses with fungi & bacteria) adaptations in herbivore digestive tracts to facilitate fermentation algae, plants coral mutualism Plants form mutualistic partnerships with… bacteria Nitrogen fixation fungi Nutrient absorption animals Pollination Seed Dispersal Defense Rhizobium bacteria in legume root nodules (N fixation) Mycorrhizae Mutualism of ecosystem importance Coral reefs – high productivity due to mutualism between polyp & unicellular algae Zooxanthellae (algae) provide photosynthates (carbohydrates) - secrete 90-99% of fixed C to coral Polyp consume zooplankton, produce ammonium as waste product, nutrient for algae Mutualism of ecosystem importance Mycorrhizae: evolved ca. 400 mya ago > 90% of plant families have mycorrhizae Leaf-cutter ants / fungus Influences on primary productivity: Consumers Top-down control...
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This document was uploaded on 03/17/2014 for the course BIO SCI 310 at Wisconsin Milwaukee.

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