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Data from: UAS imagery protocols to map vegetation are transferable between dryland sites across an elevational gradient

dataset
posted on 2023-11-30, 11:23 authored by Patrick ClarkPatrick Clark

This dataset consists of point intercept data, sampled with a point frame, from three 1 ha sites along an elevation and precipitation gradient within Reynolds Creek Experimental Watershed collected between late May and mid July, 2019. The lowest elevation site ('wbs1', 1,425 m) was vegetated by shrub steppe dominated Wyoming big sage (Artemisia tridentata ssp. wyomingensis). Vegetation at the middle elevation site ('los1', 1,680 m) was shrub steppe dominated by low sage (Artemisia arbuscula). Shrub steppe at the highest elevation site ('mbs1', 2,110 m) was dominated by mountain big sage (Artemisia tridentata ssp. vaseyana) and Utah snowberry (Symphoricarpos oreophilus utahensis). At each site 30 randomly located square 1 m^2 plots were sampled. The plots were oriented with one axis randomly chosen from 45, 90, 135, 180, 225, 270, 315 and 360 degrees north azimuth. A point frame of 20 pins was orientated perpendicular to the azimuth and each pin was lowered through the canopy and each contact was recorded to species or other plant material category. Whether the contacted material was photosynthetic (coded as a '+') or non-photosynthetic (coded as '-') was also recorded. Last seasons senesced plant material that is alive but not photosynthetic is coded as '.'. There may be 0, 1, 2 or more canopy hits for each pin (numbered 1 through n with 1 being the top-most canopy hit). A final basal hit is recorded for each pin and coded as hit 0. The point frame was moved so that a total of 5 rows were recorded for a total of 100 pins for each plot. The plant species codes used follow the USDA Plants Database.


Resources in this dataset:

  • Resource Title: Data from: UAS imagery protocols to map vegetation are transferable between dryland sites across an elevational gradient .

    File Name: point_frame_2019_reynoldscreek.xlsx

    Resource Description: This dataset consists of point frame data from three 1 ha sites along an elevation and precipitation gradient within Reynolds Creek Experimental Watershed collected between late May and mid July, 2019. The lowest site's ('wbs1', 1,425 m) characteristic dominant shrub is Wyoming big sage (Artemisia tridentata ssp. wyomingensis). The middle elevation site's ('los1', 1,680 m) dominant shrub is low sage (Artemisia arbuscula). The highest elevation site's ('mbs1', 2,110 m) dominant shrubs are mountain big sage (Artemisia tridentata ssp. vaseyana) and Utah snowberry (Symphoricarpos oreophilus utahensis). At each site 30 randomly located square 1 m^2 plots were sampled. The plots were oriented with one axis randomly chosen from 45, 90, 135, 180, 225, 270, 315 and 360 degrees north azimuth. A point frame of 20 pins was orientated perpendicular to the azimuth and each pin was lowered through the canopy and each contact was recorded to species or other plant material category. Whether the contacted material was photosynthetic (coded as a '+') or non-photosynthetic (coded as '-') was also recorded. Last seasons senesced plant material that is alive but not photosynthetic is coded as '.'. There may be 0, 1, 2 or more canopy hits for each pin (numbered 1 through n with 1 being the top-most canopy hit). A final basal hit is recorded for each pin and coded as hit 0. The point frame was moved so that a total of rows rows were recorded for a total of 100 pins for each plot. The plant species codes used follow the USDA Plants Database.

    Resource Software Recommended: Microsoft Excel,url: https://www.microsoft.com/en-us/microsoft-365/excel


  • Resource Title: GeoJSON.

    File Name: ReynoldsCrkExpWtrshdGeoJSON.json

Funding

Agricultural Research Service, 59-2052-8-002

National Science Foundation, OIA-1757324

History

Data contact name

Clark, Patrick E.

Data contact email

pat.clark@usda.gov

Publisher

Ag Data Commons

Intended use

Dataset may be used to determine plant species cover, leaf area index, and fractional photosynthetic cover. These values are used in models and may be correlated with values derived using UAS and remote sensing technologies.

Temporal Extent Start Date

2019-05-29

Temporal Extent End Date

2019-07-17

Theme

  • Not specified

Geographic Coverage

{"type":"FeatureCollection","features":[{"geometry":{"type":"MultiPolygon","coordinates":[[[[-116.73692466199,43.143771635851],[-116.73692466199,43.142691847142],[-116.73544960651,43.142691847142],[-116.73544960651,43.143771635851],[-116.73692466199,43.143771635851]]],[[[-116.74965253897,43.064659433492],[-116.74965253897,43.063579633541],[-116.74817937891,43.063579633541],[-116.74817937891,43.064659433492],[-116.74965253897,43.064659433492]]],[[[-116.71379004486,43.168698287446],[-116.71379004486,43.167618497891],[-116.71231439136,43.167618497891],[-116.71231439136,43.168698287446],[-116.71379004486,43.168698287446]]]]},"type":"Feature","properties":{}}]}

Geographic location - description

Three field sites on Reynolds Creek Experimental Watershed, Owyhee County, Idaho, USA. The sites are along an elevational and precipitation gradient. Wyoming big sage (*Artemisia tridentata ssp. wyomingensis*) is the most common shrub species at the Low site, which has an elevation of 1,425 m. The Middle site has an elevation of 1,680 m and is characterized by low sage (*Artemisia arbuscula*) and co-dominant forbs, tailcup, and silvery lupine (*Lupinus caudatus* and *Lupinus argenteus*). At the High site, with an elevation of 2,110 m, mountain big sage (*Artemisia tridentata ssp. vaseyana*) and Utah snowberry (*Symphoricarpos oreophilus utahensis*) shrubs are co-dominant.

ISO Topic Category

  • biota
  • imageryBaseMapsEarthCover

National Agricultural Library Thesaurus terms

vegetation; arid lands; streams; watersheds; shrubs; sage; Artemisia tridentata subsp. wyomingensis; Artemisia arbuscula; Artemisia tridentata subsp. vaseyana; Symphoricarpos oreophilus; canopy; photosynthesis; leaf area index; remote sensing

OMB Bureau Code

  • 005:18 - Agricultural Research Service

OMB Program Code

  • 005:040 - National Research

ARS National Program Number

  • 215

Pending citation

  • No

Related material without URL

Roser, A., Enterkine J., Requena, J.M., Glenn, N.F., Boehm, A., de Graaff, M., Clark, P., Pierson, F., and Caughlin, T.T. 2022. UAS imagery protocols to map vegetation are transferable between dryland sites across an elevational gradient. Ecosphere (in review)

Public Access Level

  • Public

Preferred dataset citation

Clark, Patrick E. (2022). Data from: UAS imagery protocols to map vegetation are transferable between dryland sites across an elevational gradient. Ag Data Commons. https://doi.org/10.15482/USDA.ADC/1527856