COMPETITION (LAB EXPERIMENTS). Galium saxatile Galium pumilum 6 7 Galium Sp. (Bedstraw)

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Presentation transcript:

COMPETITION (LAB EXPERIMENTS)

Galium saxatile Galium pumilum 6 7 Galium Sp. (Bedstraw)

Tansley (1917)

Paramecium aurelia 1 Paramecium caudatum 2 3

Fig in Molles 2006 Paramecium Species: Grown Separately (Gause 1934)

Fig in Ricklefs and Miller 2000 Paramecium Species: Grown Together (Gause 1934)

Tribolium confusumTribolium castaneum 4 5

Fig in Molles 2006 Flour Beetle Species: Grown Separately (Park 1954)

Fig in Molles 2006 Flour Beetle Species: Grown Together (Gause 1934)

COMPETITION (FIELD EXPERIMENTS)

Wide-Leaf Cattail (Typha latifolia) Narrow-Leaf Cattail (Typha angustifolia) CATTAIL COMPETITION

Wide-Leaf Cattail (Typha latifolia) Narrow-Leaf Cattail (Typha angustifolia) Cattail Species Grown Together

Narrow-Leaf Cattail (Typha angustifolia) Wide-Leaf Cattail Removed

Wide-Leaf Cattail (Typha latifolia) Narrow-Leaf Cattail Removed

Balanus 9 Chthamalus 10

Fig in Molles 2006 Barnacle Zonation

Fig in Molles 2006 Balanus Removed: Upper Intertidal Zone Balanus Removal: Middle Intertidal Zone Chthamalus Survivorship

9 Dipodomys (Kangaroo Rat) 10 Perognathus (Pocket Mouse) Large Granivores Small Granivores Insectivores Onychomys DESERT RODENTS

Fig in Molles Study Plots: Chihuahuan Desert near Portal AZ

Fig in Molles 2006 Experiment: Removal of Large Granivores (Heske et al. 1994)

Geospiza fortis (Medium Ground-Finch) 12 Darwin’s Finches Geospiza fuliginosa (Small Ground-Finch) 13 EVOLUTIONARY CONSEQUENCES OF COMPETITION

Fig in Molles 2006 Allopatric versus Sympatric Populations G. fortis G. fuliginosa G. fortis, G. fuliginosa

G. fortis G. fuliginosa G. fortis, G. fuliginosa CHARACTER DISPLACEMENT: BEAK DEPTH

1 Paramecium.jpg Drift/tribolium.confusum.jpg _rat/giantkangaroorat001.jpg

10 ttp://eebweb.arizona.edu/Courses/Ecol485_585/Perognathus_ penicillatus.jpg 11 torridus_photobyKurzius.jpg 12