EFG MT2.2 Seabird rookeries – current maps

MT2. Supralittoral coastal biome

This page provides information about the valid indicative distribution map for the ecosystem functional group MT2.2 Large seabird and pinniped colonies. For older or alternative maps, see here.

Methods

Here is the methods summary for Map code and version: MT2.2.IM.orig v1.0.

We used spatial data on Nitrogen (N) and Phosphor (P) deposition from seabird colonies (Otero et al. 2018) as an indicators of the distribution of this functional group. Original point data was in decimal degrees rounded to 6 arc-min resolution, for the maps we aggregated data to square grid cells of 250 km. We used a threshold of >1000 and <100000 kg/yr N to select minor occurrences and a threshold of >100000 kg/yr N for major occurrences.

Datasets

Seabird-colonies-NP (Otero et al. 2018):

Source of spatial indicator. Resolution: variable (points), static. Accuracy evaluation: known records.

dataset	url
Seabird-colonies-NP	https://www.nature.com/articles/s41467-017-02446-8#additional-information

Processing

Processing steps used in this map are: Thresholds :: Aggregation.

Map evaluation

This map is considered to be a Coarse quality map based on the following characteristics:

Concept alignment is Direct,specific.

Ground observations are NA.

The accuracy evaluation Known records,undocumented.

How to use the data

Available files

You can download geospatial data for this map from the following sources:

MT2.2.IM.orig (v1.0): Mapbox tileset

Note that you need to login to some services like mapbox or earthengine, and in some cases you also need to request access to the files.

License information

Indicative maps have been released with a Creative Commons Attribution 4.0 International license.

Datasets used to create this map have similar licenses, but please check the license information below.

dataset	license_info
Seabird-colonies-NP	https://creativecommons.org/licenses/by/4.0/

References

References used in this version of the maps.

• Otero XL, De La Peña-Lastra S, Pérez-Alberti A, Ferreira TO, Huerta-Diaz MA (2018) Seabird colonies as important global drivers in the nitrogen and phosphorus cycles Nature Communications 9, 246