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Alliance Detail Report: A1996
Quercus alba - Nyssa sylvatica Wet Depression Forest Alliance

The U.S. National
Vegetation Classification
These are depressional wetlands with an open to nearly closed canopy dominated by various mixtures of Quercus alba, Nyssa sylvatica, and sometimes other trees, with documented examples in Alabama, Virginia, and Kentucky.
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Translated Name:White Oak - Blackgum Wet Depression Forest Alliance
Colloquial Name:White Oak Wet Depression & Pond Forest
This alliance includes depressional wetlands with an open to nearly closed canopy dominated by various mixtures of Quercus alba, Nyssa sylvatica, and sometimes other trees. In upland depressions on sandstone on ridgetops in the Cumberland Plateau of Alabama, Quercus alba and Nyssa sylvatica form an open canopy. Other canopy species are Carya glabra and Quercus falcata. Other woody species include Acer rubrum var. rubrum, Diospyros virginiana, and Pinus taeda, In Virginia, Malus coronaria and Nyssa sylvatica dominate the very open understory and shrub layers. Typically, flooding is for several months in the late winter into early spring. There are documented examples in Alabama, Virginia, and Kentucky.
These are depressional wetlands with an open to nearly closed canopy dominated by various mixtures of Quercus alba and Nyssa sylvatica.
Quercus alba and Nyssa sylvatica dominate these depressional wetlands.
This alliance needs additional assessment from a broader area. Its old alliance predecessor (A.1996) was established because studies in a variety of areas have suggested that Quercus alba ponds are a reality. Quercus phellos - Quercus alba / Vaccinium fuscatum - (Viburnum nudum) / Carex barrattii Wet Forest (CEGL007364) from Arnold Air Force Base has been moved to this alliance.
Synonomy:

Related Type Name:

Short Citation:
  • Faber-Langendoen et al. 2017b
  • Fleming and Moorhead 2000
  • NatureServe Ecology - Southeastern U.S. unpubl. data
States/Provinces:AL, KY, TN?, VA
Nations:US
Range:This alliance is currently reported for locations in the Ridge and Valley province of Virginia (Frozen Knob on Peters Mountain, Alleghany County) and the Cumberland Plateau of northern Alabama (Bankhead National Forest, Sipsey Wilderness). Its distribution is likely to be more widespread.
US Forest Service Ecoregions
Domain Name:
Division Name:
Province Name:Southeastern Mixed Forest Province
Province Code:231   Occurrence Status:Confident or certain
Section Name:Southern Cumberland Plateau Section
Section Code:231C     Occurrence Status:Confident or certain
The canopy can be open to nearly closed. Sometimes, the deepest part of the depression is wet enough that the canopy is locally absent or sparse.
In upland depressions on sandstone on ridgetops in the Cumberland Plateau of Alabama, Quercus alba and Nyssa sylvatica form an open canopy. Other canopy species are Carya glabra and Quercus falcata. Other woody species include Acer rubrum var. rubrum, Diospyros virginiana, and Pinus taeda. Prominent vines are Smilax rotundifolia and Smilax glauca. Some typical herbaceous species are Andropogon virginicus, Chamaecrista nictitans, Dichanthelium dichotomum var. dichotomum, and Hypericum hypericoides. The long hydroperiod prevents many herbs from growing. In Virginia, Malus coronaria and Nyssa sylvatica dominate the very open understory and shrub layers. The most characteristic herbaceous species are Agrostis perennans, Carex annectens, Dichanthelium villosissimum, Hypoxis hirsuta, Lysimachia lanceolata, Oxalis grandis, Polygonum hydropiperoides, Smilax glauca, and Viola hirsutula.
In the Cumberland Plateau of Alabama, this vegetation occurs in upland depressions on sandstone on ridgetops. The flooding regime is seasonal, though with a shorter duration than related vegetation in the coastal plains, such as depressions dominated by Quercus phellos, Quercus lyrata, Carya aquatica, Quercus palustris, Quercus bicolor, Nyssa aquatica, Nyssa biflora, and Nyssa ogeche.
Low
These depressions are flooded continuously for a relatively short period of time in the late winter and early spring, and probably also refill after heavy rain events in other seasons.
Authors:
M. Pyne      Version Date: 08Jan2014


References:
  • Faber-Langendoen, D., J. Drake, M. Hall, G. Kittel, S. Menard, C. Nordman, M. Pyne, M. Reid, M. Russo, K. Schulz, L. Sneddon, K. Snow, and J. Teague. 2013-2017b. Screening alliances for induction into the U.S. National Vegetation Classification: Part 1 - Alliance concept review. NatureServe, Arlington, VA.
  • Fleming, G. P., and W. H. Moorhead, III. 2000. Plant communities and ecological land units of the Peter's Mountain area, James River Ranger District, George Washington and Jefferson national forests, Virginia. Natural Heritage Technical Report 00-07. Virginia Department of Conservation and Recreation, Division of Natural Heritage, Richmond. Unpublished report submitted to the USDA Forest Service. 195 pp. plus appendices.
  • NatureServe Ecology - Southeastern United States. No date. Unpublished data. NatureServe, Durham, NC.


USNVC Credits: Detailed Description of the National Vegetation Classification Types

Date Accessed:

To cite a description:
Author(s). publicationYear. Description Title [last revised revisionDate]. United States National Vegetation Classification. Federal Geographic Data Committee, Washington, D.C.

About spatial standards:
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About this document
This document contains type descriptions at the Alliance level of the U.S. National Vegetation Classification. These descriptions were primarily written by NatureServe ecologists in collaboration with Federal Geographic Data Committee Vegetation Subcommittee and a wide variety of state, federal and private partners as a part of the implementation of the National Vegetation Classification. Formation descriptions were written by the Hierarchy Revisions Working Group. The descriptions are based on consultation with natural resource professionals, published literature, and other vegetation classification systems. The Ecological Society of America's Panel on Vegetation Classification is responsible for managing the review and formal adoption of these types into the National Vegetation Classification. Partners involved in the implementation of the USNVC include:

U.S. Government
  • Department of Agriculture (USDA)
  • Department of Commerce (DOC)
  • Department of Defense (DOD)
  • Department of the Interior (USDI)
  • Forest Service (FS) - Chair
  • National Agriculture Statistical Service (NASS)
  • Natural Resources Conservation Service (NRCS)
  • National Oceanic and Atmospheric Administration (NOAA)
  • National Marine Fisheries Service (NMFS)
  • U.S. Army Corps of Engineers (USACE)
  • U.S. Navy (NAVY)
  • Bureau of Land Management (BLM)
  • Fish and Wildlife Service (FWS)
  • National Park Service (NPS)
  • U.S. Geological Survey (USGS)
  • Environmental Protection Agency (EPA)
  • National Aeronautics and Space Administration (NASA)
Non U.S. Government
  • NatureServe (NS)
  • Ecological Society of America (ESA)

Disclaimer:
Given the dynamic nature of the standard, it is possible a type description is incomplete or in revision at the time of download; therefore, users of the data should track the date of access and read the revisions section of the USNVC.org website to understand the current status of the classification. While USNVC data have undergone substantial review prior to posting, it is possible that some errors or inaccuracies have remained undetected.

For information on the process used to develop these descriptions see:

Faber-Langendoen, D., T. Keeler-Wolf, D. Meidinger, D. Tart, B. Hoagland, C. Josse, G. Navarro, S. Ponomarenko, J.-P. Saucier, A. Weakley, P. Comer. 2014. EcoVeg: A new approach to vegetation description and classification. Ecological Monographs 84:533-561 (erratum 85:473).

Franklin, S., D. Faber-Langendoen, M. Jennings, T. Keeler-Wolf, O. Loucks, A. McKerrow, R.K. Peet, and D. Roberts. 2012. Building the United States National Vegetation Classification. Annali di Botanica 2: 1-9.

Jennings, M. D., D. Faber-Langendoen, O. L. Louckes, R. K. Peet, and D. Roberts. 2009. Standards for associations and alliances of the U.S. National Vegetation Classification. Ecological Monographs 79(2):173-199.

FGDC [Federal Geographic Data Committee]. 2008. Vegetation Classification Standard, FGDC-STD-005, Version 2. Washington, DC., USA. [http://www.fgdc.gov/standards/projects/FGDC-standards-projects/vegetation/NVCS_V2_FINAL_2008-02.pdf]

For additional information contact:

  • Implementation of the U.S. National Vegetation Classification Standard - Alexa McKerrow (amckerrow@usgs.gov)
  • NatureServe's Development of NVC Type Descriptions - Don Faber-Langendoen (don_faber- langendoen@natureserve.org)
  • Ecological Society of America's Review of the Type Descriptions Scott.Franklin@unco.edu
  • Federal Geographic Data Committee - Vegetation Subcommittee's Activities - Marianne Burke (mburke@fs.fed.us)
We have incorporated significant descriptive information previously compiled by Alan Weakley.