A natural burn occurred in the Deep Well area of McKenzie Flats in June, 1995, following which studies were initiated to evaluate the effect of fire on plant species composition and the spatial and temporal dynamics of regrowth. The burn area was approximately 24 hectares, forming a swath about 200 m wide from the initial lightning-ignition source. The fire moved in a westward direction from the ignition point, leaving a relatively straight border along the southern boundary and an irregular edge along the northern boundary. The fire was extinguished naturally.
One week after the burn, four 100 m line-intercept transects were established along the southern boundary of the burn. Transects were installed perpendicular to the burn, so that 50 m lay inside the burned area and 50 m outside, in unburned grassland. The first transect (nearest the road) was placed 100 m from the west end of the burn and identified as Transect A. The remaining transects (B,C,D) were located at 200 m intervals from Transect A. Rebar was placed at 0 m, 50 m, and 100 m and these points recorded with a GPS unit.
Initial measurements were made in October, 1995. In subsequent years, measurements have been made in late May and late September to evaluate the response of "cool season" and "warm season" plant species. Another fire occurred on June 24, 2001. This burn only affected the unburned southern end of one transect. A prescribed burn in 2003 did not affect the transects.
Transect Preparation - A 100 m measuring tape was affixed to the 0 meter rebar stake (north) and run to the 100 meter (south) end of each transect. The tape was stretched as tight as possible to get the straightest line. Windy days were avoided to prevent the tape from billowing.
Recording Data - Four crew members worked independently, each doing a 100 m segment simultaneously. Microcassette recorders and standard microcassettes were used to record data. At each 100 m segment, the following sequence was followed: Each species/substrate encountered along the line and the distance at which that species/substrate crossed the tape was recorded. Starting location only was recorded as the ending point was the starting point of the next species/substrate.
August 2009 Burn - On August 4, 2009, a lightning-initiated fire began on the Sevilleta National Wildlife Refuge. By August 5, 2009, this fire had reached the Deep Well line-intercept transects. While there was some minor patchiness, essentially, the fire burned evenly across the transects.
Aug.1, 2008: Changes to the data: This dataset (SEV084) includes all deep well burn line intercept transect data files. The data in this file has been rigorously QAQCed. All plant codes have been updated to current kartez codes as listed on the USDA Plants Database found at http://plants.usda.gov/ Questionable identifications and obvious mistakes were updated to the best of my (Karen Wetherill) ability. Old codes are maintained in the database and can be obtained by contacting the data manager. Old meta data and individual year data can be found in /export/db/local/htdocs/data/archive/plant/transect/data_oldformat, but this data has NOT been vigorously QAQCed and contains errors. See the Sevilleta data manager for data and metadata in this old format.Missing data: 1995 meter 40-50 for transect C Notes: - Kristin Vanderbilt -Transect D was more patchily burned than the other transects. Where the comment "2001 BURN STARTS HERE" was inserted represents the location of the first burned plant encountered. Other burned plants in this transect are noted with a "BURNED" comment.26 March 2009. Data are no longer stored in the folder:/export/db/local/htdocs/data/archive/plant/transect/data_oldformat. Instead, current and old data files can be found here: /export/db/local/htdocs/data/archive/plant/dwburntransect. Data have been rigorously qa/qced. For years previous to 2000 the variable condition in not a reliable measurement. For 2000 and subsequent seasons and years the condition measurement is consistent. Copied start into original-entry column so that data are formattted the same with two decimal points for year 1995-2004. 1998 data have overlapping measurements. These are currently still being corrected. TK
Principle investigator: 1995-2002: Gosz, Jim; 2003-2008: Collins, Scott; 2009: Koontz, Terri. 2010-Present: Moore, Douglas.
Data Manager: 1995-1997: Taugher, Kimberly; 1998-2001: Vanderbilt, Kristin; 2002-2003: Seth Munson; 2004-2008: Karen Wetherill; 2009: Terri Koontz; 2010-Present: Kristin Vanderbilt.
Field Crew 1995: Geer, Susan; Gosz, Jim; Romero, Ray; 1996: Taugher, Kimberly; Belden, Lisa; Payne, Jennifer; Monteith, Nancy; Newingham, Beth; Oldehoeft, Kim; Sexton, Jason; 1997: Taugher, Kimberly; Campbell, Mariel; Conn, Rachel; Kuehner, John; Helm, Amy; Kendall, John; 1998: Kuehner, John; Frasier, Jason; Korbe, Nicole; Kroll, AJ; Hayes, Betty; Hersch, Erika.
Employee History for 2000 to 2009: Mike Friggens 1999 to September 2001; Karen Wetherill February 7, 2000 to August 2009; Terri Koontz February 2000 to August 2003 August 2006 to August 2010; Shana Penington February 2000 to August 2000; Heather Simpson August 2000 to August 2002; Chris Roberts September 2001 to August 2002; Caleb Hickman September 9, 2002 to November 15, 2004; Seth Munson September 9, 2002 to June 2004; Maya Kapoor August 9, 2003 to January 21, 2005; Tessa Edelen August 15, 2004 to August 15, 2005; Charity Hall January 31, 2005 to January 3, 2006; Yang Xia January 31, 2005 to August 2009; Michell Thomey September 3, 2005 to August 2008; Jay McLeod January 2006 to August 2006; Amaris Swann August 25, 2008 to November 2009; John Mulhouse August 24, 2009 to November 2009.