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Coniferous swamp

From Wikipedia, the free encyclopedia

Dead Stream Swamp, Michigan: a northern white cedar swamp
Dead Stream Swamp, Michigan: a northern white cedar swamp

Coniferous swamps are forested wetlands in which the dominant trees are lowland conifers such as northern white cedar (Thuja occidentalis). The soil in these swamp areas is typically saturated for most of the growing season and is occasionally inundated by seasonal storms or by winter snow melt.

The substrate is usually organic in nature and may contain peat in varying amounts or be composed entirely of muck. The swamp substrate is typically nutrient-rich and neutral to alkaline but can be acidic and nutrient-poor.

Coniferous swamps vary in composition, with different species of conifer dominating, and varying amounts of deciduous hardwoods growing within the swamp. A wide diversity of plants is represented within the swamps, with certain species dominating in a variety of microhabitats dependent on factors such as available sunlight (as in cases of trees downed by wind or disease), soil Ph, standing groundwater, and differences of elevation within the swamp such as tussocks and nurse logs.[1][2]

The different types of coniferous swamps are referred to[by whom?] according to their dominant trees. Rich conifer swamp is dominated by Northern white-cedar and typically occurs south of the climatic tension zone throughout the Midwest and northeastern United States and adjacent areas in Canada. North of the climatic tension zone, tamarack (Larix laricina) is the dominant species of conifer in minerotrophic wetlands classified as rich tamarack swamp. A roughly equal mix of hardwood trees and conifers is known as a hardwood-conifer swamp.

Rich conifer swamp



Bark of the northern white cedar
Bark of the northern white cedar

A variety of both evergreen and deciduous trees may be present in the rich conifer swamp in addition to the dominant species.





A variety of grasses and sedges may be present including multiple varieties of carex.


  • Callicladium haldanianum Callicladium moss
  • Sphagnum centrale



See also


  1. ^ Minnesota's St. Croix River Valley and Anoka sandplain:... By Daniel S. Wovcha, Barbara C. Delaney, Gerda E. Nordquist p. 113-114
  2. ^ Wetlands of the American Midwest: a historical geography of changing attitudes By Hugh C. Prince p.66
This page was last edited on 5 December 2017, at 17:45
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