Blog post 4: Sampling Strategies

Sampling Strategies Tutorial

Type of sampling Systematic  Random Haphazard
Red Maple (common) 8.6% 7.3% 18.5%
White Oak (common) 38.3% 17.4% 17.9%
Sweet birch (rare) 71.4% 100%* 100%*
American basswood (rare)  64.3% 100%* 100%*
Time spent 12 hours, 6 minutes 12 hours, 39 minutes 12 hours, 45 minutes

Table showing percent errors for various sampling techniques. *0 individuals sampled when the density is 1.2 for Sweet birch and 1.5 for American basswood 

Systematic sampling resulted in the fastest sampling time. Random sampling had the lowest percent error for the most common species, while systematic sampling had the lowest percent error for the rarest species. 

The accuracy of the sampling tended to increase with higher abundance of a given species. On average, it appears as though systematic sampling resulted in the lowest sampling error, however for the common species alone random and haphazard sampling beat out systematic sampling.

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