Canopy Oribatida: Tree specific or microhabitat specific?

• Published in: European journal of soil biology Vol. 44; no. 2; pp. 220 - 224
• Main Authors: Behan-Pelletier, Valerie M., St. John, Mark G., Winchester, Neville
• Format: Journal Article
• Language: English
• Published: Paris Elsevier Masson SAS 01.03.2008; Editions scientifiques et médicales Elsevier
• Subjects: Agronomy. Soil science and plant productions; Biochemistry and biology; Biological and medical sciences; Canopy; Chemical, physicochemical, biochemical and biological properties; Douglas fir; Fundamental and applied biological sciences. Psychology; Lichens; Microhabitat; Oribatida; Physics, chemistry, biochemistry and biology of agricultural and forest soils; Soil science; Western hemlock; Western redcedar; United States; North America; Washington; America; Microhabitat; Western hemlock; Western redcedar; Lichens; Douglas fir; Canopy; Oribatida; Oribatida,Canopy,Microhabitat,Lichens,Douglas fir,Western hemlock,Western redcedar; Pseudotsuga menziesii; Fungi; Acariformes; Arachnida; Acari; Arthropoda; Thuja plicata; Softwood forest tree; Gymnospermae; Lichenes; Coniferales; Habitat; Spermatophyta; Soil science; Tsuga heterophylla; Invertebrata; Canopy(vegetation)
• ISSN: 1164-5563
• DOI: 10.1016/j.ejsobi.2007.06.002

A diverse assemblage of oribatid mites inhabits the canopy of coniferous trees in western North America. We tested the hypothesis that oribatid mites are microhabitat specific in old-growth Douglas fir, Western hemlock and western redcedar at the Wind River Crane Canopy Research Facility, Washington, USA. The upper 3 m of canopy of the three tree species were accessed using the canopy crane. Oribatida were extracted from 4 to 12 g dwt samples of alecterioid and foliose lichens using the twig-washing technique. Overall species richness was low, 16 species representing 11 families, with no species unique to this site. Species were absent from samples taken contemporaneously from the forest floor. All oribatid species were found in foliose lichens, whereas only nine species, in seven families, were recovered from alecterioid lichens. Oribatid species richness was lichen specific depending on the tree species. On Western hemlock both lichens supported similarly rich communities, but on Douglas fir and western redcedar foliose lichens supported the richer community.