A definition of mountains and their bioclimatic belts for global comparisons of biodiversity data
JournalArticle (Originalarbeit in einer wissenschaftlichen Zeitschrift)
 
ID 986270
Author(s) Koerner, Christian; Paulsen, Jens; Spehn, Eva M.
Author(s) at UniBasel Körner, Christian
Paulsen, Jens
Spehn, Eva Maria
Year 2011
Title A definition of mountains and their bioclimatic belts for global comparisons of biodiversity data
Journal Alpine botany
Volume 121
Number 2
Pages / Article-Number 73-78
Keywords Mountain definition, Ruggedness, Mountain life zones, Alpine, Montane, Thermal belts
Abstract This is the first quantitative attempt at a global areal definition of 'alpine' and 'montane' terrain by combining geographical information systems for topography with bioclimatic criteria (temperature) subdividing the life zones along elevational gradients. The mountain definition adopted here refrains from any truncation by low elevation thresholds, and defines the world's mountains by a common ruggedness threshold ([200 m difference in elevation within a 2.50 cell, 0.50 resolution), arriving at 16.5 Mio km(2) or 12.3% of all terrestrial land area outside Antartica being mountains. The model employed accounts for criteria of `'mountainous terrain'' for biological analysis, and thus arrives at a smaller land area fraction than hydrologically oriented approaches, and by its 2.50 resolution, it includes less unstructured terrain (such as large plateaus, very wide valleys or basins) than earlier approaches. The thermal delineation of the alpine and nival biogeographic region by the climatic tree limit (the lower boundary of the alpine belt) arrives at 2.6% or 3.55 Mio km(2) of the global land area outside Antarctica (21.5% of all mountain terrain). Seven climate- defined life zones in mountains facilitate large- scale (global) comparisons of biodiversity information as used in the new electronic 'Mountain Biodiversity Portal' of the Global Mountain Biodiversity Assessment (GMBA).
Publisher Springer
ISSN/ISBN 1664-2201
edoc-URL http://edoc.unibas.ch/dok/A6001696
Full Text on edoc No
Digital Object Identifier DOI 10.1007/s00035-011-0094-4
ISI-Number WOS:000300100700001
Document type (ISI) Article
 
   

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