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Quercus taxonomy
Quercus grisea Liebm.
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This species is known to occur in the following ecosystem types (as named by the U.S. Forest Service in their Forest and Range Ecosystem [FRES] Type classification):
FRES20 Douglas-fir
FRES21 Ponderosa pine
FRES28 Western hardwoods
FRES32 Texas savanna
FRES33 Southwestern shrubsteppe
FRES34 Chaparral - mountain shrub
FRES35 Pinyon - juniper
Rounded Global Status Rank: G5 - Secure
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This species is known to occur in association with the following cover types (as classified by the Society of American Foresters):
66 Ashe juniper - redberry (Pinchot) juniper
67 Mohrs (shin) oak
210 Interior Douglas-fir
235 Cottonwood - willow
237 Interior ponderosa pine
239 Pinyon - juniper
240 Arizona cypress
241 Western live oak
More info for the term: importance value
Gray oak often occurs on sites of poor quality for timber production [20].
Equations have been developed to estimate gray oak volume and biomass as
measures of current production and utilization [10,37].
In the southwestern United States, herbicides and mechanical methods
have been used with good grazing practices to control woody plants such
as gray oak [26]. Angora goats are not effective in controlling gray
oak [29].
Gray oak appeared to decrease under grazing in an evergreen woodland in
Texas. The importance value of gray oak on plots protected from grazing
from 1946 to 1962 in livestock grazed plots was 133; the importance
value on grazed plots was 83 [23].
Converted pinyon-juniper woodlands provide grasslands or enhance
watersheds. These large scale clearings of pinyon-juniper woodlands
reduce gray oak populations [30,54].
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This species is known to occur in association with the following plant community types (as classified by Küchler 1964):
K018 Pine - Douglas-fir forest
K019 Arizona pine forest
K023 Juniper - pinyon woodland
K031 Oak - juniper woodlands
Igneous or dolomitic slopes, oak woodlands, juniper woodlands, desert chaparral; usually above 1500m.
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Rights holder/Author | eFloras.org Copyright © Missouri Botanical Garden |
Source | http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=233501041 |
More info for the terms: mesic, shrubs
The build-up of surface fuels is slow in the low productivity
pinyon-juniper savannas where gray oak occurs in Big Bend National Park,
Texas [42]. Fine fuels in pine-oak woodlands in the Park are mainly
grasses; grass fires leave trees intact. On mesic Park sites in the
pine-oak woodland, low-growing gray oak and other shrubs rarely carry a
fire unless it crowns out [15].
A downed woody material summary is useful for assessing fire potential
and danger. Downed woody material ranged from 2.8 to 9.2 cubic feet per
acre in pine-oak woodlands and from 40.1 to 81.7 cubic feet per acre in
moist woodlands [15].
Although no direct reference to gray oak acorn consumption by humans was
found in the literature, gray oak belongs to the white oak subgenus
(Lepidobalanus). Edible acorns are a characteristic of the group [32].