occurrenceStatus (http://rs.tdwg.org/dwc/terms/occurrenceStatus) @return [String] Term describing the status of the organism in the given area based on how frequent the species occurs. See the Occurrence status vocabulary at http://rs.gbif.org/vocabulary/gbif/occurrence_status.xml for recommended values. Vocabulary: http://rs.gbif.org/vocabulary/gbif/occurrence_status.xml Example: “Absent” “present”