|Scientific Name:||Picea mariana|
|Species Authority:||(Mill.) Britton, Sterns & Poggenb.|
Abies mariana Mill.
|Red List Category & Criteria:||Least Concern ver 3.1|
|Reviewer(s):||Thomas, P. & Stritch, L.|
This spruce occurs across the North American continent in the boreal zone. Its wide distribution and large population size lead to an assessment of Least Concern.
|Range Description:||Occurs in Boreal North America: from Newfoundland and New Jersey to interior Alaska.|
Native:Canada (Alberta, British Columbia, Labrador, Manitoba, New Brunswick, Newfoundland I, Northwest Territories, Nova Scotia, Ontario, Prince Edward I., Québec, Saskatchewan, Yukon); United States (Alaska, Connecticut, Maine, Massachusetts, Michigan, Minnesota, New Hampshire, Pennsylvania, Rhode Island, Vermont, Wisconsin)
|Range Map:||Click here to open the map viewer and explore range.|
|Population:||Widespread and abundant.|
|Habitat and Ecology:||Picea mariana occurs mostly in bogs or swamps and on permafrost sites ('muskeg'), at elevations between <150 m and 800 m a.s.l., occasionally in western mountains to 1,500 m or 1,800 m a.s.l., on a variety of acid soils, often on peat, in the south predominantly so. The climate is cold subhumid, but with a wide amplitude. Annual precipitation varies from 200 to 1,400 mm, the growing season from 25 to 160 days. Pure stands occur mostly on Sphagnum peat and on permafrost, elsewhere it is usually mixed with Picea glauca, Pinus banksiana and Abies balsamea; A. lasiocarpa and Pinus contorta in upland regions, and Populus tremuloides after fire. In the SE of its range Picea mariana occurs in a mixed conifer-angiosperm swamp type with Chamaecyparis thyoides, Larix laricina, Abies balsamea, Populus balsamifera, Acer rubrum, Ulmus americana, Fraxinus nigra, and other broad-leaved species.|
|Use and Trade:||Black Spruce is economically very important as a source of pulpwood especially in the eastern parts of its great range. Its wood is light in weight and strong, nearly white in colour, and contains relatively little resin. It is one of the few spruces in North America in use as a Christmas tree, due to its compact shape when taken from natural stands; this use is now in decline. A 'spruce beer' beverage is brewed using the needles, and young twigs and the needle resin are also distilled for their aromatic properties to be used in cosmetics. There is anecdotal evidence that the drinking of spruce beer saved the English inhabitants of 18th century trading posts in Hudson Bay from succumbing to scurvy, caused by a deficiency of vitamin C in sailor's diets. Native Americans used the split roots to bind together birch bark canoes, as their elastic properties tend to pull the seams tight. In horticulture Black Spruce is valued for its compact, slow growth and often glaucous leaves and a modest number of cultivars, both dwarf forms and variegated forms, are available in the trade|
|Major Threat(s):||No threats have been identified for this species.|
|Conservation Actions:||Black Spruce occurs in many protected areas across its range.|
|Citation:||Farjon, A. 2013. Picea mariana. The IUCN Red List of Threatened Species. Version 2015.2. <www.iucnredlist.org>. Downloaded on 29 June 2015.|