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Unformatted text preview: drought: 40-90 Drought: no scouring winter floods 5 D i c o s m e u-+ Wootton, Parker and Power 1996, Science Experimental Treatments (N = 6): Dicosmoecus (+, -) x Steelhead (+, -) 6 6 6 6 Steelhead: + -6 Dicosmoecus No No Dicosmoecus Dicosmoecus 7 Defended (armored or sessile) grazers dominate downstream from dams or diversions, where flow is artificially regulated 8 Natural Disturbance vs Artificial Regulation Flood: Edible grazers Drought: Inedible grazers 9 Diet doesnt predict dynamics!! Top down cascade through four trophic levels Bottom up energy flow through three trophic levels...
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