Simpson's Diversity Index and Species Evenness
The relative abundances of four species in two pond ecosystems are shown below.
Pond X: Species 1 (45%), Species 2 (45%), Species 3 (5%), Species 4 (5%)
Pond Y: Species 1 (25%), Species 2 (25%), Species 3 (25%), Species 4 (25%)
Based on these data, which statement correctly compares the Simpson’s Diversity Index (SDI) for the two ecosystems?
A
Simpson’s Index cannot be compared without species richness
B
Pond Y has a higher Simpson’s Index due to greater evenness
C
Both ponds have identical Simpson’s Index values
D
Pond X has a higher Simpson’s Index due to dominance
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