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Describes the results document.
Updated Nov 6, 2009 by joerg.ho...@gmail.com

1st Sheet: Taxonomic Grouping

The GBIF-mediated orrcurrence records were split into twenty taxonomic groups, according to kingdom, phylum and/or class. Each group has a unique number that identifies the rows in the result tables.

2nd Sheet: Temporal and Spatial Analysis

The second sheet shows the temporal and spatial breakdown.

Overall numbers The first three columns display number and kingdom/phylum/classes for each taxonomic group. Records indicates the number of occurrence records in the group, percentage the share compared to all GBIF-accessible records. The values in the sum row report the number and percentage of the records that were employed for this analysis.

Temporal splitup This part of the analysis only employs records with a gathering date and break them down according to gathering year and season, respectively (q1 = Jan-Mar, q2 = Apr-Jun, q3 = Jul-Sep, q4 = Oct-Dec).

Spatial The spatial splitup consists of twelve regions, seven terrestrial and five marine areas, based on the Food and Agriculture Organization of the United Nation’s (FAO) Major Fishing Areas (see map below). The terrestrial areas are Africa (FAO Area 01), North America (FAO Area 02), South America (FAO Area 03), Middle East plus southern Asia (FAO Area 04), Europe plus northern Asia (FAO Area 05), Oceania (FAO Area 06), and Antarctica (FAO Area 08). The five marine areas were derived by lumping FAO Statistical Areas for Fishery Purposes as follows: Pacific is FAO Fishing Areas 61, 67, 71, 77, 81, 87, 88, Atlantic is FAO Fishing Areas 21, 27, 31, 34, 41, 47, 48, Indian is FAO Fishing Areas 51, 57, 58, Mediterranean and Black Sea is FAO Fishing Area 37, Arctic Sea is FAO Fishing Area 18.

3rd sheet: Species Analysis

The third sheet analyses the occurrence data from a species perspective, on a global scale and separately for six latitudinal bands.

The latitudinal ranges are

  • 0 - 30 degrees for low latitudes,
  • 30 - 60 degrees for mid latitudes and
  • 60 - 90 degrees for high latitudes.

sp cnt total indicates the number of species in GBIF's authoritative classification system for each taxonomic group. sp cnt w/ occ indicates the amount of species with at least one geo-referenced occurrence record. median occ and mean occ indicate the median of occurrence records per species and the mean number of occurrences per species, respectively.


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