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Blog post 4
I chose the Mohen Hill tutorial
Haphazard technique – 12 hours 20 min
Systemic technique – 12 hours, 39 min
Random technique – 12 hours , 10 min
Haphazard :
Common species
– Red maple T = 403.1 E= 408.3
% error = 1.14%
– White Oak T= 74.5 E= 75
%error = 0.67 %
Rare species
- Downy Juneberry T= 9.9 E= 12.5
% error = 26.3 %
- Striped Maple T= 13.6 E= 25.0
% error = 83.8 %
Does accuracy change with species abundance ? Yes Accuracy changes with species abundance. The % error for the common species was very low compared to the % error for the rare species.
Systemic technique
Common species
- Red maple T = 403.7 E= 424
% error = 5%
- White Oak T= 74.5 E= 84
% error = 12.8%
Rare species
- Black tupelo T= 35.5 E= 4
% error = 88.73 %
- Downy Juneberry T= 9.9 E= 24.0
% error = 142.4 %
Does accuracy change with species abundance? Yes accuracy seems to change with abundance as the % for the common species is again low compared to the % error for the rare species.
Random Technique
Common species
- Red maple T= 403.7 E= 413.0
% error = 2.3 %
- White Oak T= 74.5 E= 91.3
% error = 22.56%
Rare species
- American Basswood T= 1.5 E= 4.3
% error = 186.67%
- Downy Juneberry T= 9.9 E= 13
% error = 31%
Does accuracy change with species abundance? Accuracy does not seem to change with abundance with this technique. The percent errors are all quite high compared to other techniques – except Red Maple.
Comparing the Shannon Weiner diversity indexes – it appears that Haphazard was the most accurate T= 1.8 E= 1.7
Random- T= 1.8 E= 1.6
Systematic T= 1.8 E= 1.4
