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- Q21370376 subject Q7223185.
- Q21370376 subject Q8953498.
- Q21370376 abstract "Picea × lutzii is a hybrid spruce tree that is a natural cross between white spruce and Sitka spruce occurring where the ranges of the two species overlap in coastal south-central Alaska and coastal British Columbia. Its common name is Lutz spruce. Its morphology is intermediate between the two parent species, the maritime Sitka spruce and the white spruce of dryer climates further inland. In addition to the parent spruces it shares its ecosystem with Tsuga heterophylla and T. mertensiana. The tree was named for Harold John Lutz, a scientist who specialized in forest soils and worked briefly for the United States Forest Service in Alaska where he collected the material used to describe the hybrid. A Lutz spruce from Alaska's Chugach National Forest was selected in 2015 for the Capitol Christmas Tree. This is the first Capitol Tree that has come from the state of Alaska.Lutz's spruce grows as tall as 30 meters in height, and it is a generally symmetrical tree with open and downward bowing branches. While its needles are sharp like the Sitka spruce, they are not as "stiff" and, therefore, less "prickly." The seed cones closely resemble those of the Sitka spruce but are smaller and with the rounded tops of white spruce cones.Between 1987 and 2000 the largest known epidemic of spruce bark beetle (Dendroctonus rufipennis) caused the death of 90% of white, Sitka, and hybrid Lutz spruce, almost all of the mature spruce trees, in a 3.2 million acre forest in the Kenai Peninsula and Copper River. The spruce bark beetle is a part of the native ecosystem, mainly hosted by the white spruce of the dryer interior, in south-central Alaska where the tree loss occurred in apparently healthy old growth forest. One theory about the decimation of trees is that warmer spring and summer temperatures have allowed the beetles an annual reproductive cycle, shortened from every two to three years, while warmer winter temperatures have increased the number of beetles that live through winter to reproduce in spring. In addition to increased temperatures, increased aridity in the region has created dryer forests lowering the production of sap, a barrier defense against insect and fungal pests, in the spruces. Lutz spruces, like its primary host, the white spruce, are more susceptiblethan what? to bark beetle damage and suffer a higher mortality rate when infected.".
- Q21370376 binomialAuthority Q2917869.
- Q21370376 class Q132825.
- Q21370376 division Q132825.
- Q21370376 family Q101680.
- Q21370376 genus Q26782.
- Q21370376 kingdom Q756.
- Q21370376 order Q1000370.
- Q21370376 thumbnail Picea_x_lutzii_Skagway.jpg?width=300.
- Q21370376 wikiPageWikiLink Q1000370.
- Q21370376 wikiPageWikiLink Q101680.
- Q21370376 wikiPageWikiLink Q1089340.
- Q21370376 wikiPageWikiLink Q1144409.
- Q21370376 wikiPageWikiLink Q128116.
- Q21370376 wikiPageWikiLink Q132825.
- Q21370376 wikiPageWikiLink Q147426.
- Q21370376 wikiPageWikiLink Q1571926.
- Q21370376 wikiPageWikiLink Q1891156.
- Q21370376 wikiPageWikiLink Q26782.
- Q21370376 wikiPageWikiLink Q2917869.
- Q21370376 wikiPageWikiLink Q593894.
- Q21370376 wikiPageWikiLink Q6938319.
- Q21370376 wikiPageWikiLink Q7223185.
- Q21370376 wikiPageWikiLink Q756.
- Q21370376 wikiPageWikiLink Q8953498.
- Q21370376 binomialAuthority Q2917869.
- Q21370376 classis Q132825.
- Q21370376 divisio Q132825.
- Q21370376 familia Q101680.
- Q21370376 genus "Picea".
- Q21370376 name "Lutz spruce".
- Q21370376 ordo Q1000370.
- Q21370376 regnum "Plantae".
- Q21370376 type Conifer.
- Q21370376 type Eukaryote.
- Q21370376 type Plant.
- Q21370376 type Species.
- Q21370376 type Thing.
- Q21370376 type Q19088.
- Q21370376 type Q756.
- Q21370376 comment "Picea × lutzii is a hybrid spruce tree that is a natural cross between white spruce and Sitka spruce occurring where the ranges of the two species overlap in coastal south-central Alaska and coastal British Columbia. Its common name is Lutz spruce. Its morphology is intermediate between the two parent species, the maritime Sitka spruce and the white spruce of dryer climates further inland. In addition to the parent spruces it shares its ecosystem with Tsuga heterophylla and T. mertensiana.".
- Q21370376 label "Picea × lutzii".
- Q21370376 depiction Picea_x_lutzii_Skagway.jpg.
- Q21370376 name "Lutz spruce".