Test Your Knowledge: Sorenson’s Index
| Grevy's zebra |
Buffalo | Impala | Dik-dik | |
|---|---|---|---|---|
| Grevy's zebra | ||||
| Cape Buffalo | .42 | |||
| Impala | .37 | |||
| Dik-dik |
| Animal | Grass | Browse | Classification | ||
|---|---|---|---|---|---|
| Dik-dik | 5% | (1) | 95% | (19) | browser |
| Grevy's zebra | 90% | (18) | 10% | (2) | |
| Impala | 28% | (5) | 72% | (3) | |
| Cape Buffalo | (9) | (6) | |||
Question 3 of 3
Based on the data you collected in Module 1 and the Sorenson’s index calculations, are diets typically more similar between two grazers (in other words, within a guild) or between a grazer and a browser (across guilds).
The Sorenson’s index value for dik-dik and impala, two browsers, is 0.33. For comparison, the value for impala and buffalo, a browser and a grazer, is 0.37. These close values show that diets are not always more similar within guilds. However, diets are also not always more similar across guilds.