Sampling herbaceous vegetation in the Arctic tundra

Point intercept techniques for sampling Other methods of sampling vegetation include quadrat, transect, and distance-based techniques

You are required to take 20 point frame samples W. clover Violet Pigweed Moss Bare Bare Dandy Plantain Grass1 Grass2 1 3 4 3 2 4 2 4 3 5 2 3 2 4 5 You are required to take 20 point frame samples ‘randomly’ located within our study plot.

To document in Excel: Use the Excel file provided to you on our home page as a template: http://www.uky.edu/~jast239/courses/ens/Excel.xlsx Sheet 1: Insert photo of your raw data sheet Sheet 2: Enter your raw data here and perform cover calculations. Use formulas for full credit. Sheet 3: Provide the percent cover for each morphospecies ranked from highest to lowest (include bare ground) Provide the species richness value, the total number of morphospecies Sheet 4 Calculate your Simpson’s diversity index (D) and provide its final value. Use formulas for full credit.

This is your raw data sheet, but for only 10 point frames 147 points total 96 of them were grass The absolute cover of grass is (96/147)* 100 = 65.3%

147 points total 96 of them were grass The absolute cover of grass is (96/147)* 100 = 65.3%

Simpson’s D D = ∑ (n/N)2 n = the total number of individuals collected within a particular species N = the total number of individuals of all species The value of D ranges between 0 and 1 Subtract D from 1 to get the Simpson’s index of diversity. The larger the value of D, the higher the diversity.

One is complete evenness One is complete evenness. Simpson’s is not very sensitive to rare species.

Factors that would influence numerical results Mowing, spraying of lawn Motivation and time available to observers Taxonomic skills Time of year Recent weather Degree of randomness incorporated into sampling design Errors