Round 8: Tossup 16

A hypothesis for how herbivores and pathogens affect levels of this quantity in forests was proposed by Janzen and Connell. A measure of this quantity is given by [read slowly] “one minus the sum of little n times little n (10[1])minus one, over big N (-5[1])times big N minus one.” Measures for this quantity named for Simpson and Shannon (10[1])consider (10[1])both evenness and richness. (10[2]-5[1])A “latitudinal (10[1])gradient” describes how this biological quantity (10[1])increases near the tropics. (10[1])Regions with high values for this quantity that are threatened by human habitation are known as its “hotspots” and include the (10[1])Amazon Rainforest. For 10 points, name this quantity that measures the variability of species in a region. ■END■

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