Quercus buckleyi Nixon & Dorr  

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IUCN Red List Assessment:
Red List Category

LC
Least Concern

Red List Criteria

Version

3.1

Year Assessed

2015

Assessor/s

Kenny, L. & Wenzell , K.

Reviewer/s

Oldfield, S.

Contributor/s

Rivers, M.C.

Justification

Buckley Oak, endemic to the Edwards Plateau in the south-central United States, has an extent of occurrence (EOO) of more than 240,000 km2 and occurs abundantly in the upland woodlands of this region. Despite reports of poor regeneration and oak wilt, declines are not known to be impacting the population across the range. Given its large, stable population and sizeable extent of occurrence, Quercus buckleyiis of Least Concern.

History

  • 1998
    Vulnerable (VU)
Licensehttp://creativecommons.org/licenses/by-nc-sa/3.0/
Rights holder/AuthorInternational Union for Conservation of Nature and Natural Resources
Sourcehttp://www.iucnredlist.org/apps/redlist/details/34030

National NatureServe Conservation Status:
United States

Rounded National Status Rank: N5 - Secure

Licensehttp://creativecommons.org/licenses/by-nc/3.0/
Rights holder/AuthorBroaddus, Lynn (1991), rev. L. Morse (1998), rev. L. McDonald (2001), NatureServe
Sourcehttp://explorer.natureserve.org/servlet/NatureServe?searchName=Quercus+buckleyi

NatureServe Conservation Status:

Rounded Global Status Rank: G5 - Secure

Reasons: Quercus buckleyi occurs in north central and central Texas and reported from Oklahoma and Kansas as well.

Licensehttp://creativecommons.org/licenses/by-nc/3.0/
Rights holder/AuthorBroaddus, Lynn (1991), rev. L. Morse (1998), rev. L. McDonald (2001), NatureServe
Sourcehttp://explorer.natureserve.org/servlet/NatureServe?searchName=Quercus+buckleyi

Population:

Population

While the population size of Quercus buckleyiis unknown, observations of the abundance of this species within its range suggest that the population is large and relatively stable. Impacts of oak wilt and poor regeneration have been reported in some areas, but no current reports have observed widespread decline.

Population Trend

Stable
Licensehttp://creativecommons.org/licenses/by-nc-sa/3.0/
Rights holder/AuthorInternational Union for Conservation of Nature and Natural Resources
Sourcehttp://www.iucnredlist.org/apps/redlist/details/34030

Threats:

Major Threats

Since the 1930s, low recruitment in stands of Quercus buckleyi has been reported, likely due to browsing from increasing white-tailed deer populations. While the population is not currently in decline, this may impact future population viability as mature trees age and die.

Reports also suggest that oak wilt (caused by the fungusCeratocystis fagacearum) is impacting Q. buckleyi stands in central Texas, resulting in degradation of critical habitat for the endangered Golden-cheeked Warbler.

Licensehttp://creativecommons.org/licenses/by-nc-sa/3.0/
Rights holder/AuthorInternational Union for Conservation of Nature and Natural Resources
Sourcehttp://www.iucnredlist.org/apps/redlist/details/34030

Conservation Actions:

Conservation Actions

Though some threats to Buckley Oak have been noted, the local abundance and currently stable population suggest that this species is not currently a priority for conservation efforts. However, monitoring of these threats would be beneficial and allow for early response if the population starts to decline across the range. According to BGCI, this species is maintained in 23 ex situ collections worldwide (BGCI 2015).
Licensehttp://creativecommons.org/licenses/by-nc-sa/3.0/
Rights holder/AuthorInternational Union for Conservation of Nature and Natural Resources
Sourcehttp://www.iucnredlist.org/apps/redlist/details/34030

Quercus buckleyi:

Quercus buckleyi, commonly known as Texas red oak or Buckley's oak, is a species of flowering plant in the Fagaceae family.[2][3] It is endemic to the southern Great Plains of the United States. It is smaller and more likely to be multi-trunked than its close relative, the Shumard oak. The two species are interfertile, and hybrids are common along a line from Dallas to San Antonio. Texas red oak usually is 30 to 50 feet (9 to 15 meters) tall at maturity, and seldom reaches a height of more than 75 feet (23 meters). Its previous scientific name was Quercus texana which is now the scientific name for Nuttall's oak and thus has led to much confusion when referencing this oak.[4]

It is a highly regarded ornamental and shade tree. In autumn the leaves turn vivid red and orange.

References[edit]

  1. ^ Nixon, K. et al. 1998. Quercus buckleyi. 2006 IUCN Red List of Threatened Species. Downloaded on 23 August 2007.
  2. ^ Preston, Richard J.; Braham, Richard R. Quercus buckleyi. In: North American trees. Iowa State Press.
  3. ^ USDA Natural Resources Conservation Service. Plant Profile: Quercus buckleyi
  4. ^ Flora of North America: Quercus buckleyi
Licensehttp://creativecommons.org/licenses/by-sa/3.0/
Rights holder/AuthorWikipedia
Sourcehttp://en.wikipedia.org/w/index.php?title=Quercus_buckleyi&oldid=640073676

Range Description:

Endemic to the Edwards Plateau of the south-central United States, Buckley Oak (Quercus buckleyi) grows only incentral Texas and Oklahoma, with an unconfirmed report from Kansas. Despite its somewhat restricted occurrence, Q. buckleyiis locally abundant within this area, in the upland forests and woodlands of central Texas and southern Oklahoma. Herbarium records document this species from at least 35 counties in Texas and13 counties in Oklahoma, reflecting that it occurs commonly throughout these states. Its estimated extent of occurrence (EOO) is roughly 240,800 km2.

Licensehttp://creativecommons.org/licenses/by-nc-sa/3.0/
Rights holder/AuthorInternational Union for Conservation of Nature and Natural Resources
Sourcehttp://www.iucnredlist.org/apps/redlist/details/34030

Comments:

For many years the names Quercus texana , Q . rubra var. texana , and Q . shumardii var. texana were erroneously used for Q . buckleyi (L. J. Dorr and K. C. Nixon 1985). 

 Quercus texana reportedly hybridizes with Q . marilandica (= Q . × hastingsii Sargent). Quercus × hastingsii may be derived from Q . marilandica var. ashei (D. M. Hunt 1989). Hybridization with Q . shumardii may also occur (L. J. Dorr and K. C. Nixon 1985).

Licensehttp://creativecommons.org/licenses/by-nc-sa/3.0/
Rights holder/AuthoreFloras.org Copyright © Missouri Botanical Garden
Sourcehttp://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=233501014

National Distribution:
United States

Origin: Native

Regularity: Regularly occurring

Currently: Present

Confidence: Confident

Licensehttp://creativecommons.org/licenses/by-nc/3.0/
Rights holder/AuthorNatureServe
Sourcehttp://explorer.natureserve.org/servlet/NatureServe?searchName=Quercus+buckleyi
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