Sampling Strategies

The sampling results for the Virtual Forrest Tutorial is located here: blog 4 sampling results

Sampling Type   Estimated Sampling Time  % Error 2 Most Common Species (density)  % Error 2 Rarest Species (density)  Accurate?  
  1. Systematic: Sampling along a topographic gradient 

 

12 hrs 35 min  17% 

 

26% 

129% 

 

138% 

 N
  1. Sampling method 2 Random sampling 
12 hr 43 min  11% 

 

29% 

19% 

 

49% 

 Y
  1. Haphazard or subjective sampling 
12hr 44 min / 12hr 43min   8% 

 

22% 

53% 

 

96% 

 N

 

 

 

 

  1. Which technique had the fastest estimated sampling time?  

Sampling technique 1 Systematic: Sampling along a topographic gradient had the fastest estimated sampling time.  

     2. Compare the percentage error of the different strategies for the two most common and two rarest species. Did the accuracy change with species abundance?  

In all the strategies % error increased with a decrease in species abundance.  

     3. Was one sampling strategy more accurate than another? 

Sampling strategy 2 Random Sampling is the most accurate for both high density and low-density species as we can see from the comparisons of percent error in the table.  

Leave a Reply

Your email address will not be published. Required fields are marked *