Layer: TGW Vegetation Monitoring (ID: 13)

Parent Layer: Vegetation Monitoring Locations

Name: TGW Vegetation Monitoring

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Description: <DIV STYLE="text-align:Left;"><DIV><DIV>Vegetation monitoring in the Tallgrass West Implementation area tracks species composition, structure, and diversity of ~900 acres of grassland in the 1370-acre Tall Grass West Implementation Area, an important transitional area between the Rocky Mountain foothills and the Western Great Plains. The purpose of the monitoring is to describe the species composition, structure and diversity of the grassland vegetation, to determine temporal changes over time, and to relate those changes to agricultural management practices. 26 permanent monitoring transects were installed in 2005 in the Boulder Greens Venture, Dover-Blacker, Hedgecock, Stengel I, T.H.P., Frasier Farms and Wells east properties. The area was stratified by three grazing treatments (continuously grazed, ungrazed since 2006, and ungrazed for > 10 years prior to 2006) and environmental gradient (riparian/floodplain, upland terraces, and grassland-forest inteface) and transects were randomly placed within each stratum where possible. 15 of the 26 vegetation transects were aligned with wildlife transects established at the same time to characterize bird habitat near and far from trails: random locations were constrained to areas near these transects. Additional transects established by ESCO Associates in earlier years as part of the Tall Grass State Natural Area Monitoring (10 transects) and Prairie Dog Vegetation Monitoring (2 transects) were also sampled as part of this study.Monitoring occurred in July or August between 2005 and 2008 with most but not all transects were sampled in all four years. Details about the sampling design, monitoring objectives and field procedures can be found in the project protocol. The 50-m transects were oriented randomly from the origin point. The transect origins were marked in the field with rebar stakes driven flush with the ground and topped with labelled aluminum caps. Four-foot tall, white fiberglass stakes were positioned at both the origin and endpoint of each transect. Transect orientations were recorded to facilitate consistent relocation of the transects. Names in the feature class are a concatenation of the “TGWV” prefix for Tall Grass West Vegetation, followed by the transect number (1-33, but no transects numbered 4, 12, 15, 17, 20, 21, 23, 27, 31). The same name is used in the OSMP Inventory and Monitoring database, but a leading zero is added to the transect number.Vegetation abundance was monitored by point-intercept technique using a point-projection device mounted on a tripod. Crosshairs visible in the eyepiece delineated the intercept point, and low magnification of the lens allowed the botanist to identify the species or substrate (i.e. bare soil, litter, rock) beneath the point. Second hits were recorded when the cover-point optical device intercepted an additional point of canopy vegetation directly beneath the 1st intercept reading. Point intercepts were taken on both sides of the transect at 1.0 m intervals along a 50-m transect to give 100 points per transect used to derive % cover by species. All species observed within a 2-m wide belt transect on both sides of the 50m transect were also listed with 0.1 cover to derive species richness. Transect were photographed during each monitoring session, looking from the origin to the end point.Frequency data were collected in ten 1 m x 5 m subplots located on one side of the 50 m transect when looking from origin to endpoint. All species in the subplots were tallied and frequency was determined as the number of subplots in which the species was present divided by 10 total plots surveyed. While cover and species richness were consistently sampled, frequency was monitored in only a subset of plots in each year. Additional details on study objectives, design and methods can be found in the Tallgrass West Vegetation Monitoring Project protocol, updated april 2013.</DIV></DIV></DIV>

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