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Article: Imprimé

Circumpolar Arctic Vegetation Classification / Donald A. Walker in Phytocoenologia, 48 (2) (2018)

Article (2018)

[article]
inPhytocoenologia > 48 (2) (2018) . - 181-201

Titre :	Circumpolar Arctic Vegetation Classification
Type de document :	Imprimé
Auteurs :	Donald A. Walker ; Fred J. A. Daniëls ; Nadezhda V. Matveyeva ; Jozef Šibík ; Marilyn D. Walker ; Amy L. Breen ; Lisa A. Druckenmiller ; Martha K. Raynolds ; Helga Bültmann ; Stephan Hennekens ; Marcel Buchhorn ; Howard E. Epstein ; Ksenia Ermokhina ; Anna Maria Fosaa ; Starri Heidmarsson ; Birgitt Heim ; Ingibjörg Svala Jónsdóttir ; Natalia E. Koroleva ; Esther Lévesque ; William H. MacKenzie ; Greg H. R. Henry ; Lennart Nilsen ; Robert K. Peet ; Volodya Razzhivin ; Stephen S Talbot ; Mikhail Telyatnikov ; Dietbert Thannheiser ; Patrick J. Webber ; Lisa M. Wirth
Année de publication :	2018
Article en page(s) :	181-201
Langues :	Français (fre)
Catégories :	[CBNPMP-Thématique] Groupements végétaux, phytosociologie
Résumé :	AVA and AVC are modeled after the European vegetation archive (EVA) and classification (EVC). The AVA will use Turboveg for data management. The AVC will use a Braun-Blanquet (Br.-Bl.) classification approach. There are approximately 31,000 Arctic plots that could be included in the AVA. An Alaska AVA (AVA-AK, 24 datasets, 3026 plots) is a prototype for archives in other parts of the Arctic. The plan is to eventually merge data from other regions of the Arctic into a single Turboveg v3 database. We present the pros and cons of using the Br.-Bl. classification approach compared to the EcoVeg (US) and Biogeoclimatic Ecological Classification (Canada) approaches. The main advantages are that the Br.-Bl. approach already has been widely used in all regions of the Arctic, and many described, well-accepted vegetation classes have a pan-Arctic distribution. A crosswalk comparison of Dryas octopetala communities described according to the EcoVeg and the Braun-Blanquet approaches indicates that the non-parallel hierarchies of the two approaches make crosswalks difficult above the plant-community level. A preliminary Arctic prodromus contains a list of typical Arctic habitat types with associated described syntaxa from Europe, Greenland, western North America, and Alaska. Numerical clustering methods are used to provide an overview of the variability of habitat types across the range of datasets and to determine their relationship to previously described Braun-Blanquet syntaxa. We emphasize the need for continued maintenance of the Pan-Arctic Species List, and additional plot data to fully sample the variability across bioclimatic subzones, phytogeographic regions, and habitats in the Arctic. This will require standardized methods of plot-data collection, inclusion of physiogonomic information in the numeric analysis approaches to create formal definitions for vegetation units, and new methods of data sharing between the AVA and national vegetation-plot databases.
Lien pérenne :	DOI : 10.1127/phyto/2017/0192
Permalink :	https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=151234

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