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Thuja plicata

Thuja plicata

Status
Not Evaluated

IUCN conservation assessment category

Habitat
boreal evergreen forests, subarctic taiga belts, and montane zones

Primary ecological niche & biome

Diet
autotrophic carbon fixation via photosynthesis and mycorrhizal water uptake

Dietary type and primary food source

Activity
perennial evergreen growth with spring pollination

Diurnal, nocturnal, or active patterns

Scientific Summary

GBIF Taxonomic Backbone & Wikipedia Registry Profile

Thuja plicata is a large evergreen coniferous tree in the family Cupressaceae, native to the Pacific Northwest of North America. Its common name is western redcedar. It is also less commonly called western red cedar, pacific red cedar, giant arborvitae, western arborvitae, just cedar, giant cedar, or shinglewood. It is not a true cedar of the genus Cedrus. T. plicata is the largest species in the genus Thuja, growing up to 70 metres (230 ft) tall and 7 m (23 ft) in diameter. It mostly grows in areas that experience a mild climate with plentiful rainfall, although it is sometimes present in drier areas on sites where water is available year-round, such as wet valley bottoms and mountain streamsides. The species is shade-tolerant and able to establish in forest understories and is thus considered a climax species. It is a very long-lived tree, with some specimens reaching ages of well over 1,000 years. Indigenous peoples of the Pacific Northwest use the wood of this species for many purposes, such as building canoes, totem poles, and tools. The bark is harvested by indigenous peoples and processed into a fiber, which they use to make items such as rope, baskets, clothing, and rain hats. Because of its wide range of uses, the species is of great cultural importance to these people. Western redcedar wood is aromatic and rot-resistant and is used for applications such as the construction of shingles and siding. It has been introduced to cool temperate areas in other parts of the world, such as Northern Europe and New Zealand.
Biology & Conservation

Ecologically, the conservation status of Thuja plicata is officially designated as Not Evaluated. Current field registries estimate a global population composed of an unquantified number of individuals, making habitat preservation critical to maintaining their wild populations.

It is typically endemic to boreal evergreen forests, subarctic taiga belts, and montane zones, showing great physiological synergy with its surroundings. In terms of dietary preferences, it relies primarily on a diet of autotrophic carbon fixation via photosynthesis and mycorrhizal water uptake. It exhibits specialized adaptations centered around a perennial evergreen growth with spring pollination activity pattern, optimizing its energy conservation and interactions within its native ecosystem. The species has a typical natural lifespan of approximately 350 years, allowing it to adapt and mature through structured generational cycles.

Ongoing biological monitoring and ecological advocacy emphasize the importance of protecting this species. The stability of its food chain and the prevention of fragmentation in its primary range are vital for the continued survival of Thuja plicata.

Energy & Activity Profile
Habitat & Adaptation Index
Quick Facts
Native RangeGlobal
Habitat Rangeboreal evergreen forests, subarctic taiga belts, and montane zones
Lifespan350 Yrs
StatusData Deficient
ScientificThuja plicata
Registry Info
Lifespan350 years
KingdomPlantae
FamilyCupressaceae