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A high-resolution bioclimate map of the world: a unifying framework for global biodiversity research and monitoring

Global Ecology and Biogeography

By:
, , , , , and
DOI: 10.1111/geb.12022

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Abstract

Aim: To develop a novel global spatial framework for the integration and analysis of ecological and environmental data. Location: The global land surface excluding Antarctica. Methods: A broad set of climate-related variables were considered for inclusion in a quantitative model, which partitions geographic space into bioclimate regions. Statistical screening produced a subset of relevant bioclimate variables, which were further compacted into fewer independent dimensions using principal components analysis (PCA). An ISODATA clustering routine was then used to classify the principal components into relatively homogeneous environmental strata. The strata were aggregated into global environmental zones based on the attribute distances between strata to provide structure and support a consistent nomenclature. Results: The global environmental stratification (GEnS) consists of 125 strata, which have been aggregated into 18 global environmental zones. The stratification has a 30 arcsec resolution (equivalent to 0.86 km2 at the equator). Aggregations of the strata were compared with nine existing global, continental and national bioclimate and ecosystem classifications using the Kappa statistic. Values range between 0.54 and 0.72, indicating good agreement in bioclimate and ecosystem patterns between existing maps and the GEnS. Main conclusions: The GEnS provides a robust spatial analytical framework for the aggregation of local observations, identification of gaps in current monitoring efforts and systematic design of complementary and new monitoring and research. The dataset is available for non-commercial use through the GEO portal (http://www.geoportal.org).

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Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
A high-resolution bioclimate map of the world: a unifying framework for global biodiversity research and monitoring
Series title:
Global Ecology and Biogeography
DOI:
10.1111/geb.12022
Volume
22
Issue:
5
Year Published:
2013
Language:
English
Publisher:
Wiley
Contributing office(s):
Climate and Land Use Change Program
Description:
9 p.
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Global Ecology and Biogeography
First page:
630
Last page:
638
Other Geospatial:
Earth