Question

example: community 1. species richness = 4 abundance of species a = 5/20 = 25% abundance of species b = 5/20 = 25% abundance of species c = 5/20 = 25% abundance of species d = 5/20 = 25% example: community 2. species richness = 4 abundance of species a = 16/20 = 80% abundance of species b = 1/20 = 5% abundance of species c = 1/20 = 5% abundance of species d = 2/20 = 10% 1. calculate the species richness and relative abundance for the following communities. community a species name species abundance relative abundance white oak 35 slippery elm 78 black walnut 309 red maple 12

Explanation:

Step1: Calculate total number of individuals

$35 + 78+309 + 12=434$

Step2: Calculate species richness

Species richness is the number of different species, so species richness = 4

Step3: Calculate relative abundance of White Oak

Relative abundance of White Oak = $\frac{35}{434}\times100\%\approx8.06\%$

Step4: Calculate relative abundance of Slippery Elm

Relative abundance of Slippery Elm = $\frac{78}{434}\times100\%\approx17.97\%$

Step5: Calculate relative abundance of Black Walnut

Relative abundance of Black Walnut = $\frac{309}{434}\times100\%\approx71.19\%$

Step6: Calculate relative abundance of Red Maple

Relative abundance of Red Maple = $\frac{12}{434}\times100\%\approx2.77\%$

Answer:

Species Name	Species Abundance	Relative Abundance
Slippery Elm	78	17.97%
Black Walnut	309	71.19%
Red Maple	12	2.77%

Species richness: 4