Menu▼
Data Home / Data Access / Data...

Plant species composition data for Saddle grid plots from 1989 - ongoing, yearly from 2010

Data set creator(s): Hope Humphries; Marilyn Walker

For data content questions, contact Niwot LTER data manager

For methodology questions, contact Hope Humphries
INSTAAR, University of Colorado
1560 30th St., UCB 450
Boulder, CO 80309-0450
(303) 492-2594

Find More Niwot LTER Data

Search tips: Core Area, Discipline, Site, Variable, Investigator, Year, etc.

LTER Network Data Access:

LTER NIS Data Portal
(LTER Network Information System community website)

LTER Network Site

Find More Niwot LTER Data

Search tips: Core Area, Discipline, Site, Variable, Investigator, Year, etc.

Data Usage Summary
  • Data Use Policy

    1. Use our data freely. All Niwot LTER data products (except some recent data sets for which metadata but not data are available) are released to the public and may be freely copied, distributed, edited, remixed, and built upon under the condition that you provide acknowledgement as described below.

    2. Give proper acknowledgement. Publications, models and data products that make use of these data sets must include proper acknowledgement, including citing data sets in a similar way to citing a journal article. See http://www.datacite.org/whycitedata). The following acknowledgment should accompany any publication or citation of these data: Logistical support and/or data were provided by the NSF supported Niwot Ridge Long-Term Ecological Research project and the University of Colorado Mountain Research Station

    3. Let us know how you will use the data. The data set creators and Niwot LTER would appreciate hearing of any plans to use the data set. Consider consultation or collaboration with data set creators.

    4. Although efforts have been made to ensure that these data are of the highest quality, the possibility of errors exists. Plase notify the data manager of any errors at lternwt@colorado.edu.

Abstract:

Permanent 1-m^2 plots were established beside each of the 88 Saddle grid stakes in 1989 by Marilyn Walker, who led the sampling effort until 1997. Each plot was located within 2 m of the stake, but always in the same vegetation type as that associated with the stake. The distance and direction from the grid stake were randomly selected, and thus varied from plot to plot. Point quadrat measurements have been made at irregular intervals from 1989 to the present (1989, 1990, 1995, 1997, 2006, 2008,  and yearly from 2010 onward). The point-quadrat technique used was identical to that described by Auerbach (1992) for sampling in 1989 to 1997: The point-quadrat method was used for estimating plant cover. The aluminum point-quadrat frame was 1 m^2 in size, with double-layer filament spaced 10 cm apart to make a 10 x 10 cm grid, for a total of 100 sample points per plot. Before sampling, the point-quadrat frame was leveled and plots were permanently marked in the following manner. Aluminum tags were nailed into the ground so that a frame could be repositioned in the same location from year to year; i.e., tags with a hole in the middle were used to define the locations for the point frame legs and four tags with a "X" stamped on them (positioned somewhere inside each of the frame corners) were used to define alignment of the frame by positioning the string crossings over these "X"s. Plant genus and species were recorded for top and bottom hits at each point for 1990-1997 data. In 1989, middle hits were also recorded. A plant species hit occurs when a plant part touches a thin metal stick placed at the intersection of 2 filaments in the quadrat. If plant parts of a given species touch the stick at multiple places, only one hit is recorded. In the next sampling year, 2006, and continuing to the present, all hits were recorded at each point, but frame distances were not measured.  In addition, exact repositioning of the frame was not possible in some plots due to absence or relocation of tags. Data are formatted as one species hit per row (“string of pearls’).

Location:

Study sites were the 88 Niwot Ridge Saddle grid points. Original plot sheets, data entry spreadsheets, data collection/entry notes, and additional point-quadrat technique descriptions are stored with the NWT LTER data manager.

Date Range:

1989 - ongoing

Frequency:

yearly from 2010

Variables:

year, plot number, point identification number, hit type, species code, species name

Location: Saddle grid plots

At a glance:
SDL

Saddle site
Elevation: 3500 m

 

Location Group: Saddle

Found within: Niwot Ridge (USFS - UNESCO Biosphere Reserve)
Located in: USFS - UNESCO Biosphere Reserve
(Click to learn more about these locations)

More data from: Saddle

Core Data Set: yes Core Area: Populations
Discipline: Plant/vegetation ecology
Award Or Grant: DEB1027341

Map
Methods
Keywords
Columns
Creator(s)
Reference(s)
Related
Log
Data Citation

Humphries, Hope. Walker, Marilyn. 2017. Plant species composition data for Saddle grid plots from 1989 - ongoing, yearly from 2010. http://niwot.colorado.edu

Instaar
Instaar
NSF
CU Boulder

This material is based upon work supported by the National Science Foundation under Cooperative Agreement #DEB-1637686. Any opinions, findings, conclusions, or recommendations expressed in the material are those of the author(s) and do not necesarily reflect the views of the National Science Foundation.

Please contact lternwt@colorado.edu with questions, comments, or for technical assistance regarding this website.

Content

Main Menu

Home Location Flora/Fauna Research Data Publications Outreach Personnel

Utilities

News Links Contact PI login