# Guild table: relative abundance

Hello everyone,
my question is about the relative abundance in the guild table: should all rows sum up to one? is it meant in regard to the individuals or the species?
Thank you,
Sabine

Welcome to the forum @Sabine!
The relative abundance values are relative to the sum of all values in the column, for example, in the sample guild table from the userâ€™s guide:

``````SPECIES  ...  relative_abundance
Apis              0.75
Bombus            1
Apis2             0.75
Bombus2           1
``````

The sum of relative abundance values is 3.5. 0.75/3.5 = 0.214 and 1/3.5 = 0.286, thus, you could equivalently write the table so it sums to one like this:

``````SPECIES  ...  relative_abundance
Apis              0.214
Bombus            0.286
Apis2             0.214
Bombus2           0.286
``````

It is kind of confusing. If you have data on the actual abundance of each pollinator, you could use that directly, for example:

``````SPECIES  ...  relative_abundance
Apis              55 (bees per hectare)
Bombus            70 (bees per hectare)
``````

If you donâ€™t have this data, but just an estimate, like â€śthere are twice as many Bombus as Apisâ€ť, you could write that as

``````SPECIES  ...  relative_abundance
Apis              1
Bombus            2
``````

If you have no data at all, you could weight them equally:

``````SPECIES  ...  relative_abundance
Apis              1
Bombus            1``````
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