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THE CONVERGENCE OF HABITAT STRUCTURE IN TUNDRA COLLEMBOLAN COMMUNITIES (INSECTA: ORDER COLLEMBOLA)1

  • Masanori J. Toda (a1) and Kouzou Tanno (a1)

Abstract

Habitat structure of two collembolan communities, one at Barrow, Alaska, U.S.A., the other at Tuktoyaktuk in the Mackenzie Delta, Canada, has been analyzed in relation to microtopographies characteristic of tundra regions. Multivariate statistical techniques, cluster analyses (UPGMA), and principal component analyses (PCA) reveal various ecological changes in component species. In spite of such local variations in component species, the two communities show similar patterns of habitat structure that are organized principally along a gradient of environmental moisture.

La structure de l'habitat de deux communautés de Collemboles (l'une à Barrow, Alaska, U.S.A., l'autre à Tuktoyaktuk, dans le delta de Mackenzie, Canada) a été analysée en fonction des microtopographies caractéristiques des régions de tundra. Les techniques statistiques d'analyses multivariées, les analyses de groupe (UPGMA) et les analyses de composantes principales (PCA) mettent en évidence certains changements écologiques concernant la composition des espèces. Malgré ces variations locales dans la composition des espèces, les deux communautés montrent des patrons de structure d'habitat assez semblables. Ces mêmes patrons semblent d'ailleurs distribués principalement le long d'un gradient d'humidité du substrat.

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THE CONVERGENCE OF HABITAT STRUCTURE IN TUNDRA COLLEMBOLAN COMMUNITIES (INSECTA: ORDER COLLEMBOLA)1

  • Masanori J. Toda (a1) and Kouzou Tanno (a1)

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