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Bug #2952

Calculation of species cover values in communities

Added by Robert Peet about 13 years ago. Updated about 13 years ago.

Status:
Closed
Priority:
Normal
Assignee:
Category:
atlas
Target version:
Start date:
09/08/2007
Due date:
% Done:

0%

Estimated time:
Bugzilla-Id:
2952

Description

It appears that mean cover reported for a community is the average of all the cover class values.

Changes, id needed:

1) Calculate cover only based on the plots in which the species is present -- do not include plots where not present. I think this is already the way it is done so probably no change is needed.

2) To calculate the mean, convert the cover values to the midpoints of their ranges and then average the midpoints and convert back to a coverclass (an integer value, not a decimal value).

The values to use for this calculation are as follows
1 = 0 - <0.1%
2 = .1 - <1%
3 = 1 - <2
4 = 2 - <5
5 = 5 - <10
6 = 10 - <25
7 = 25 - <50
8 = 50 - <75
9 = 75 - <95
10= 95 - 100

History

#1 Updated by xianhua liu about 13 years ago

fixed

#2 Updated by Robert Peet about 13 years ago

fixed

#3 Updated by Redmine Admin over 7 years ago

Original Bugzilla ID was 2952

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