Plant species, biomass and environmental characteristics of relevés along the North America Arctic bioclimate gradient

Question: How do interactions between the physical environment and biotic properties of vegetation influence the formation of small patterned-ground features along the Arctic bioclimate gradient? Location: At 68° to 78°N: six locations along the Dalton Highway in arctic Alaska and three in Canada (Banks Island, Prince Patrick Island and Ellef Ringnes Island). Methods: We analysed floristic and structural vegetation, biomass and abiotic data (soil chemical and physical parameters, the n-factor [a soil thermal index] and spectral information [NDVI, LAI]) on 147 microhabitat releves of zonalpatterned-ground features. Using mapping, table analysis (JUICE) and ordination techniques (NMDS). Results: Table analysis using JUICE and the phi-coefficient to identify diagnostic species revealed clear groups of diagnostic plant taxa in four of the five zonal vegetation complexes. Plant communities and zonal complexes were generally well separated in the NMDS ordination. The Alaska and Canada communities were spatially separated in the ordination because of different glacial histories and location in separate floristic provinces, but there was no single controlling environmental gradient. Vegetation structure, particularly that of bryophytes and total biomass, strongly affected thermal properties of the soils. Patterned-ground complexes with the largest thermal differential between the patterned-ground features and the surrounding vegetation exhibited the clearest patterned-ground morphologies.

Synoptical flora of North America /

Vol. I. pt. II. Caprifollaceæ to Compositæ first published in 1884; vol. II. pt. I, Gamopetalæ after Composilæ, in 1878.

Grasses of North America /

Includes bibliographical references.

Tuberales of North America /

Bibliography: pages 52-53.

A guide to the Naididae (Annelida, Clitellata, Oligochaeta) of North America /

Includes index to scientific names, p. 46-47.

The Across North America Tracer Experiment (ANATEX) model evaluation study /

Mode of access: Internet.

The Pleistocene of the middle region of North America and its vertebrated animals /

Mode of access: Internet.

Graptolites of North America /

Mode of access: Internet.

Constitution and laws of the International Printing Pressmen and Assistants' Union of North America.

Description based on: 1924.

General laws of the Upholsterers' International Union of North America.

Latest issue consulted: 1925.

Wildflowers of North America in full color,

Mode of access: Internet.

NEOGENYTON, OR, INDICATION OF SIXTY-SIX NEW GENERA OF PLANTS OF NORTH AMERICA

Mode of access: Internet.

New York illustrated : presented to members of the National Division, Sons of Temperance of North America, by the Grand Division of Eastern New York at the 29th annual session, New York City, June 18, 1873 /

Mode of access: Internet.

A practical guide for emigrants to North America, including the United States, Lower and Upper Canada, and Newfoundland; with full information respecting ... matters requisite for the emigrant to become acquainted with before embarking ...

Howes N54.