Calculating Ecological Indices

The video tutorial explains how to calculate the Channel's diversity index and Simpson's dominance index using data from a field study on zoo planting. It provides step-by-step instructions on using Excel to compute the total number of individuals, Pi values, Pi Square, Log Pi, and Pi into Log Pi. The tutorial concludes with calculating the diversity and dominance indices and encourages viewers to subscribe and share the video.

What is the primary purpose of calculating diversity and dominance indices in ecological studies?

• To determine the genetic makeup of species

• To estimate the variety and abundance of species

• To measure the physical size of species

• To calculate the growth rate of species

In the context of the video, what does 'n' represent?

• The number of species

• The number of samples

• The total number of individuals

• The number of calculations

How is the proportion of each species (p_i) calculated?

• By adding the number of individuals of all species

• By dividing the total number of individuals by the number of species

• By dividing the number of individuals of a species by the total number of individuals

• By multiplying the number of species by the total number of individuals

What is the significance of calculating p_i squared in the analysis?

• It helps in determining the average size of species

• It is used to calculate the dominance index

• It measures the genetic diversity of species

• It is used to calculate the growth rate of species

What is the formula for calculating log p_i?

• log(total individuals)

• log(p_i)

• log(n_i)

• log(n)

What does the Shannon diversity index (H) represent?

• The total number of species

• The genetic variation within a species

• The diversity of species in a community

• The dominance of a single species

How is the value of p_i * log p_i calculated?

• By multiplying p_i with the total number of individuals

• By multiplying p_i with log p_i

• By adding p_i and log p_i

• By subtracting log p_i from p_i

What does the Simpson's dominance index (D) measure?

• The total number of species

• The genetic variation within a species

• The dominance of one or more species

• The diversity of species in a community

Which Excel function is used to sum all p_i squared values for calculating the Simpson's index?

• COUNT

• SUM

• PRODUCT

• AVERAGE

What is the final step in calculating the Simpson's dominance index?

• Subtracting the sum of p_i squared values from 1

• Adding the sum of p_i squared values to the total number of individuals

• Multiplying the sum of p_i squared values by 2

• Dividing the sum of p_i squared values by the total number of species