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Round 7: 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 minus one, over big N times big N minus one.” Measures for this quantity named for (10[1])Simpson and Shannon consider (10[2])both (-5[1])evenness (10[1])and richness. (10[1])A “latitudinal (10[2])gradient” describes how this biological quantity increases near the tropics. Regions with high values for this quantity that are threatened (10[1])by human habitation are known as its “hotspots” and include the Amazon Rainforest. For 10 points, name this quantity that measures the variability of species in a region. ■END■ (10[1])

ANSWER: biodiversity [accept biodiversity hotspots; accept latitudinal diversity gradient; accept Simpson diversity index or Gini–Simpson diversity index or Gini’s diversity index or Shannon diversity index; prompt on species evenness until read by asking “can you be less specific?”; prompt on species richness until read by asking “can you be less specific?”; prompt on Gini impurity by asking “what quantity does that measure?”]
<Editors, Biology> | Packet I
= Average correct buzz position

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Buzzes

PlayerTeamOpponentPositionValue
Liam HendersonMcMaster BToronto E5310
Brendan BridleQueen's AToronto F5710
Nathaniel GodfreyToronto DWaterloo A5710
Carter YottMcMaster AToronto B58-5
Indigo ChenWaterloo CWaterloo B5910
Shaynee RuffleToronto GGuelph A6110
Thomas BrittainMcMaster CToronto I6310
Ethen SunToronto CToronto A6310
Sicheng JiangToronto HBrock A8310
Chris WangToronto BMcMaster A11210

Summary

TournamentEditionTUHConv. %Neg %Average Buzz
UK (North)UK5100%0%80.20
UK (South)UK8100%38%75.00
Northern CaliforniaUS4100%0%50.25
Southern CaliforniaUS7100%14%58.57
Eastern Canada (1)US5100%0%65.60
Eastern Canada (2)US9100%11%67.56
FloridaUS4100%25%78.75
Great LakesUS12100%17%63.08
Lower Mid-AtlanticUS9100%0%58.00
Upper Mid-AtlanticUS2100%0%45.50
MidwestUS9100%22%63.44
NorthUS4100%50%94.75
NortheastUS10100%20%70.40
PacificUS8100%0%59.63
South CentralUS7100%0%68.14
SoutheastUS13100%0%65.77
Upstate NYUS5100%20%67.00