Populations

PWV01 Cover of woody vegetation at Konza Prairie

Abstract: 

This data set relates effects of soil, grazing intensity and burning treatments on the establishment and subsequent expansion of woody plants in prairie communities. The locations of woody vegetation are marked on a mylar overlay of an aerial photograph of the area being surveyed with an unique symbol for each species and a number for the size. For trees, size is the height to the nearest meter. For shrubs, the number of stems is recorded as a measure of size if the number is less than 25. For large patches of shrubs, the diameter is recorded and the shape of the patch is drawn on the overlay. Two forms of the data are archived. One of them is the actual mylar sheets. The other form is an electronic ascii data that is stored in the subdirectory woody on the lter Novell server. Files are named according to the name of the watershed and year the data was collected (e.g. 004b86.one = first data file for 004b in 1986). For 1986, the files also exist as coverages in PC ARC/INFO files.

Core Areas: 

Data set ID: 

70

Short name: 

PWV01

Purpose: 

Relate effects of soil, grazing intensity and burning treatments on the establishment and subsequent growth of woody plants in prairie communities and how these factors affect the prairie-forest boundary.

Related sites: 

1D
2D
N4D
4B
N4A
4F
N1B

Data sources: 

PWV011

Methods: 

Watersheds Sampled:

1981: 020B, 020C, 020D, 001A, 001D, 004B, 004F, 004G, 004H, 010D, 033A, 033D, 099C.

1986: 020B, 020C, 020D, 001A, 002D, 001D, 004B, 004F, 004G, 004H, 010D, 033A, 033D, 099C, N20B, N01B, N04A, N04D.

1991: 001D, 002D, 004B, 020B, N01B, N04D,N20B.

1996: 001D, 002D, 004B, 020B, 001A, 020A, N01B, N04D, N20B, 020C, 020D.

Frequency of Sampling: Beginning in 1981 and every five years thereafter.

Variable Measured: Location of each individual tree, shrub and patch of scrubs according to species and size

Methods: Each area is walked in parallel lines approximately 15-20 m apart. The locations of woody

vegetation are marked on a mylar overlay on a large-scale aerial photograph of the area being surveyed with a unique symbol for each species and a number for size. A real effort is made to detect young individuals in order to estimate when growth started and ascertain mortality in the early years. Species are coded by symbols and color. For trees, size is the height to the nearest meter above 2 m. For shrubs, the approximate diameter and shape of the patch is drawn on the overlay.

Form of Data Output: A GIS file is prepared for each watershed and the raw ASCII X,Y file coordinates are available for 1981 and 1986.

For additional metadata information see: http://lter.konza.ksu.edu/sites/default/files/DC.pdf

For additional methods information see: http://lter.konza.ksu.edu/sites/default/files/MM.pdf

Maintenance: 

complete

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