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REWM 3500Rangeland Plant EcophysiologyMonday, November 9, 2009
Plant-plant interactions
Facilitation and Competition
Models of resource competition
Can plants sense presence of neighbors?
What traits confer competitive success in arid and semiarid rangeland?
Interference competition (Allelopathy)
responsesp-A sp-B
Neutral 0 0Mutualism + +Commensalism + 0Amensalism - 0Parasitism + -Herbivory + -Predation + -Competition - -
Biotic interactions
Ambrosia roots growing into Larrea roots
Larrea roots growing into Ambrosia roots
Mahall and Callaway 1991
Root-root communication and interference