A BWCA Glossary


Yew
Any of several coniferous trees or shrubs belonging to the genus Taxus. Canada Yew (Taxus canadensis) is a shrub native to the North Woods and a favored moose browse. From the Old English iw or eow.
Yoke
On a canoe, a shaped crosspiece, generally hardwood and often with pads, designed to balance the load of the canoe on one's shoulders while portaging. Also called a Portage Yoke.
Zitkala
A small lake in the Kawishiwi River drainage south of Insula. "Red Bird" in the Lakotah language.
Zone of Aeration
Zone immediately below the ground surface within which pore spaces are partially filled with water and partially filled with air.
Zone of Saturation
The zone below the zone of æration in which all pore spaces are filled with water.
Zones, USDA
Regional climatic area designations based upon average maximum low winter temperatures. Most of the North Country is in USDA zones 3 (30°-40° below zero) and 2 (40°-50° below zero).
Zooplankton
Literally animal plankton and includes the eggs, young, and small adult animals of all animal species. Zooplankton are generally longer than 153 µm, up to about 5,000 µm or about 0.2". Freshwater zooplankton are dominated by four major groups of animals: protozoa, rotifers, and two subclasses of the Crustacea, the cladocerans and copepods. From the Greek, zoi (zoi), "animal", and planktos (planktos), "to wander or drift."



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Last Updated on 11 April, 2004