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Natureserve 2017 NVC Field Keys and Report Nov 2017 CBR

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Natureserve 2017 NVC Field Keys and Report Nov 2017 CBR Field Keys to Groups and Alliances in the National Vegetation Classification: Central Basin & Range Ecoregion NatureServe Conservation Science Division P r i n c i p a l Investigator Patrick J. Comer , Chief Ecologist [email protected] 703.797.4802 November 2017 Photos (clockwise from top left; all used under Creative Commons license CC BY 2.0.): Big sage shrubland, Humboldt-Toiyabe National Forest, Nevada. USDA Photo by Susan Elliot. http://flic.kr/p/ax64DY Jeffrey pine woodland, photo by David Prasad. https://www.flickr.com/photos/33671002@N00 Northwest Great Plains Mixedgrass Prairie, Dakota Prairie National Grasslands, North Dakota. Western juniper woodland, BLM Black Hills Recreation Area, Oregon. Acknowledgements This work was completed with funding provided by the Bureau of Land Management through the BLM’s Fish, Wildlife and Plant Conservation Resource Management Program under Cooperative Agreement L13AC00286 between NatureServe and the BLM. Suggested citation: Schulz, K., G. Kittel, M. Reid and P. Comer. 2017. Field Keys to Divisions, Macrogroups, Groups and Alliances in the National Vegetation Classification: Central Basin & Range Ecoregion. Report prepared for the Bureau of Land Management by NatureServe, Arlington VA. 14p + 51p of Keys + Appendices. See appendix document: Descriptions_NVC_Groups_Alliances_CentralBasinRange_Nov_2017.pdf 2 | P a g e Contents Introduction and Background ....................................................................................................................... 4 Purpose and Objectives ................................................................................................................................ 4 Project Overview ........................................................................................................................................... 4 List of Products.......................................................................................................................................... 5 Field Key Design and Instructions for Use .................................................................................................... 6 NVC Hierarchy ........................................................................................................................................... 6 Use in Field ................................................................................................................................................ 9 Use in the office ........................................................................................................................................ 9 Key Instructions......................................................................................................................................... 9 Other tips for using field keys. ................................................................................................................ 11 References Cited ......................................................................................................................................... 13 Keys to USNVC Divisions, Macrogroups, Groups and Alliances in the Central Basin and Range Ecoregion .................................................................................................................................................................... 15 Figures Figure 1. EPA Ecoregions used to organize field keys to the Groups and Alliances of the National Vegetation Classification (NVC) .................................................................................................................... 5 Figure 2. Summary of the primary criteria used to define the various levels of the USNVC. ....................... 6 Tables Table 1. Levels, definition and example of the hierarchy for natural vegetation......................................... 7 Field keys to NVC Groups and Alliances in Four EPA Ecoregions for BLM NatureServe November 2017 3 | P a g e Introduction and Background BLM manages extensive lands that support a variety of vegetation types that have been classified and mapped and multiple scales to facilitate resource planning, decision making, and natural resource management. On the ground land managers and biologists need to be able to independently classify these habitats to US National Vegetation Classification (NVC) vegetation types to assess the accuracy of these maps and directly label new AIM vegetation transects while in the field. These new labeled transects can be used to improve the map accuracy, assess ecological condition (ruderal vs natural or semi-natural vegetation), assess fuel loads/fire risk, and target habitats for species of concern for species management. Field key to vegetation types are an important tool for managers to label vegetation. Dichotomous keys allow field personnel to systematically step through options and arrive at a label for a given geographic area. Field key results are linked to descriptions of each type, which can help confirm result and provide information on range of type, species composition, environmental factors, and ecological processes such as fire, and other information that will assist in resource management and vegetation restoration. Purpose and Objectives Across the West, BLM managers are implementing Secretarial Order 3336, to apply new strategies appropriate to conservation and management of sagebrush ecosystems and sage-grouse habitat. The sage-grouse habitat assessment framework (Stiver et al. 2015) and the BLMs Assessment, Inventory and Monitoring strategy (MacKinnon et al. 2011, Toevs et al. 2011, Herrick et al. 2015) have field data collection as components during which a land cover type “label” can be applied to the area being sampled. Having keys to units in the National Vegetation Classification (NVC; FGDC 2008) for use in the field would provide tools for achieving consistent application of NVC type names to these field samples. Accurately labeled on-the-ground vegetation samples are extremely valuable for a number of applications, e.g. monitoring of rangeland condition by vegetation type, training sites for mapping, inventory of vegetation types found in a management area and identifying particular habitats for species of concern (Reid et al. 2016). NatureServe ecologists have developed keys for use in the field to the NVC Macrogroups, Groups, and Alliances found in 4 clusters of EPA ecoregions (Figure 1): a) Central Basin and Range, b) Northern Great Basin and Range / Columbia Basin, c) Wyoming Basin, and c) Northwestern and Western Great Plains / High Plains (northern portion) (EPA 2013, Omernik 1987). The keys include the vegetation types most relevant to the BLM, such as sagebrush, pinyon-juniper, semi-desert scrub (e.g. blackbrush, salt desert scrub), lower elevation grasslands, and riparian and wet meadow types. Generally, higher elevation forests and alpine vegetation types were not included, unless of particular interest in one ecoregion (e.g. aspen in the Central Basin and Range) or to clarify contrasting vegetation units. Project Overview NatureServe ecologists are well prepared to write field keys such as these. For the original LANDFIRE effort, we developed field keys to ecological systems, organized into clusters of map zones (roughly corresponding to ecoregions). NatureServe is a [artner with the National Park Service’s Vegetation Inventory Program, and has written keys over recent decades for many national park vegetation inventory efforts in the western U.S. (e.g. Cogan et al. 2012, Kearsley et al. 2015), many of them organized by NVC alliances. NatureServe ecologists developed the procedures for assigning of expert labels to plots, in coordination with the LANDFIRE, FIA, USGS and TNC partners. In partnership with LANDFIRE NatureServe staff recently developed keys to automate the labeling of some 400,000 plots in CONUS to NVC Groups (Reid et al. 2014). The writing of field keys includes the following major tasks: 1) Determine list of NVC Groups and Alliances found in the geography selected for the field key. 2) Compile and review previously written keys for related vegetation (e.g. keys to ecological systems, NPS park units). 3) Review concepts (e.g. descriptions) and criteria used in the LANDFIRE auto-keys to NVC Groups 4) Write the keys to selected NVC Macrogroups, Groups, and Alliances 5) Have someone who did not write the keys conduct a thorough review of the keys 6) Revise keys as necessary Field keys to NVC Groups and Alliances in Four EPA Ecoregions for BLM NatureServe November 2017 4 | P a g e Figure 1. EPA Ecoregions used to organize field keys to the Groups and Alliances of the National Vegetation Classification (NVC) that are found in these ecoregions. NVC types found in the Northern Basin and Range and Columbia Plateau ecoregions were combined into one key. Types found in the northern portion of the High Plains ecoregion were included in the Northwestern Great Plains key. List of Products 1) Project summary report (this document) 2) Field keys NVC Groups and Alliances found in 4 clusters of EPA ecoregions including: a. Central Basin and Range b. Northern Basin and Range / Columbia Plateau c. Wyoming Basin d. Northwestern Great Plains / High Plains (northern portion) 3) Descriptions of NVC Divisions, Macrogroups, Groups and Alliances reported to occur in each EPA ecoregion (Appendices to each ecoregional key, see appendix document Descriptions_NVC_Groups_Alliances_CentralBasinRange_Nov_2017.pdf). Each ecoregion-based key is a separate document, with the same
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