Mapping of abundance

[LienReyserhove]

The DwC field occurrenceStatus will be, in certain cases, a combination between the fields abundance and population_status.

In most cases , we can translate abundance to the GBIF controlled vocabulary of occurrenceStatus. This is what I suggest (not al mapping is straightforward):

abundance	occurrenceStatus
common	common
abundant	common
rare	rare
local	present
single record	present
sporadic	irregular
unknown	doubtful

However, for 30 taxa, population_status contains the field extinct, which is valuable information for occurrenceStatus:

population_status	abundance	records
Extinct	Absent or extinct	9
Extinct	Local	6
Extinct	Rare	11
Extinct	Single record	4
Extinct	Unknown	8

I would suggest the following:

population_status	abundance	occurrenceStatus
Extinct	Absent or extinct	extinct
Extinct	Unknown	exinct

For the remaining abundance data (21 records in total) we could split the data (this is the same approach as in the manual of alien plants):

population_status	abundance	occurrenceStatus	eventDate
Extinct	local	present	start_year/end_year
Extinct	rare	rare	start_year/end_year
Extinct	single record	present	start_year/end_year
Extinct	local	extinct	end_year/now
Extinct	rare	extinct	end_year/now
Extinct	single record	extinct	end_year/now

However, as it only concerns 21 records, I would keep it simple, and just map the abundance categories to extinct

[LienReyserhove]

See also this issue

[LienReyserhove]

After as short discussion with @DavidRoy, we decided to keep the mapping of the extinct species very simple, as it concerns only 21 records here. This is how these 21 records will be mapped:

population_status	abundance	occurrenceStatus
extinct	local	extinct
extinct	rare	extinct
extinct	single record	extinct