The line-intercept transects included in this data set have been discontinued. These transects were installed to evaluate temporal and spatial dynamics in vegetation transition zones (e.g.black grama grassland/creosote shrubland) at one centimeter resolution. Each study site originally contained four 400 m transects, representing total coverage of 1 sq km. The transects were placed along a roughly north/south azimuth. The northwestern and southwestern transects were 100 meters from the western edge of the 1 sq km study area and the northeastern and southeastern transects were 100 m from the eastern edge, providing 800 meters between the eastern and western transects. The northeastern and northwestern transects began to the north and, after an interval of 200 meters, the southeastern and northeastern transects began, terminating at the southern edge of the study area.
Ongoing line-intercept transect data for transect 1, which continues to be sampled at both Deep Well and Five Points, can be found in SEV004.
Measuring the Transects: A 100 m tape was attached to permanent pieces of rebar at each of the four segments of a 400 m transect. The tape was stretched as tightly as possible to get the straightest line. Windy days were avoided as this became impossible.
Crew members worked independently, each sampling a 100 m segment simultaneously. Microcassette recorders and standard microcassettes were used to record data. At each 100m segment, the following sequence was followed:
Each species or substrate encountered along a transect was recorded at the centimeter level. The distance at which a species or substrate first crossed the tape was recorded. Starting points only were recorded as the ending point of a species or substrate was the starting point of the next. It was also noted whether vegetation was fully alive, fully dead or a mix of both.
Changes to the data: This dataset (SEV200) includes all discontinued line-intercept transect data files. In particular, data is included from Bronco Well, Valle de la Jornada, Rio Salado and Sepultura Canyon, as well as transects 2-4 from Deep Well and Five Points. Transect 1, season 2 data from Deep Well and Five Points in 1994 is also included (1994 was the only year that three seasons od data were collected). Otherwise, SEV004 contains transect 1 data from Deep Well and Five Points.
The data in this file has not been rigorously QA/QCed. Old metadata and individual year data can be found in: /export/db/local/htdocs/data/archive/plant/transect/data_oldformat. This data will not be available online. See the Sevilleta data manager for data and metadata in this old format.
Principle investigator:1989-1998: Milne, Bruce; Gosz, JimData Manager:1989-1992: Taugher, Kimberly 1993: Maddux, Troy; Taugher, Kimberly 1994: Maddux, Troy; Taugher, Kimberly; Chavez, Melissa1995: Geer, Susan; Taugher, Kimberly1996-1998: Taugher, KimberlyField Crew1989: Banar, Alethea; Keller, David; Loftin, Sam; Maddux, Troy; Wolterstorff, Susan1990: Franklin, Jennifer; Loftin, Sam; Maddux, Troy; Murillo, Michelle; Shortess, Amy; Viers, Joran1991: Maddux, Troy; Loftin, Sam; Viers, Joran; McGee, Kathleen; Prichard, Susan1992: Maddux, Troy; Chavez, Melissa; Valdez, Monica; Bradley, Mike; Knight, Julie; Collier, Anthony; Persaud, Amanda; Ortiz, Ivan1993: Oriz, Ivan; Swanick, Raine; Taylor, Rob; Wagner, Natalie1994: Chavez, Melissa; Bocock, Jonathan; Altenbach, Marilyn; Yanoff, Steven; East, Micheal; Muckenhoupt, Jim; Budkovich, Pamela; Grant, Tom1995: Geer, Susan; Smith, Richard; Carpenter, Claire; Parker, Kelli; Giese, Kristy; Belden, Lisa; Weiss, Linda1996: Taugher, Kimberly; Belden, Lisa; Payne, Jennifer; Monteith, Nancy; Newingham, Beth Oldehoeft, Kim; Sexton, Jason1997: Taugher, Kimberly; Campbell, Mariel; Conn, Rachel; Kuehner, John; Helm, Amy; Kendall, John1998: Kuehner, John; Frasier, Jason; Korbe, Nicole; Kroll, AJ; Hayes, Betty; Hersch, ErikaMore information about when the data were collected: Spring 1989 Summer 1989dw 5/17/89-6/4/89 8/4/89-8/7/89fp 6/5/89-6/12/89 8/8/89-8/9/89sp 5/22/89-5/30/89 8/1/89-8/3/89vj 6/13/89-6/20/89 8/10/89-8/11/89 Spring 1990 Summer 1990All 5/23/90-6/14/90 All 8/6/90-9/5/90 Spring 1991 Summer 1991All 5/22/91-7/12/91 All 7/22/91-8/15/91 Spring 1992 Summer 1992All 6/3/92-6/18/92 7/28/92-8/6/92 Spring 1993 Summer 1993dw 5/27/93-5/31/93 7/14/93-7/20/93 fp 6/4/93-6/10/93 7/22/93-7/27/93vj 6/14/93-6/17/93 8/3/93-8/4/93rs 6/17/93-7/9/93 8/4/93-8/10/93bw 6/21/93-7/21/93 8/12/93-8/17/93sp 7/6/93-7/8/93 not measured Spring 1994 Summer1994 Fall 1994 dw 6/6/94 7/26/94 9/27/94-9/28/94 fp 6/8/94-6/9/94 8/2/94 9/29/94-10/3/94vj 6/20/94 8/1/94-8/2/94 10/5/94rs 5/31/94-6/3/94 7/25/94 10/6/94bw 6/15/94-6/16/94 8/4/94 10/10/94-10/11/94sp 6/23/94-6/27/94 8/9/94 10/13/94 Spring 1995 Fall 1995dw 5/25/95 10/2/95 fp 5/30/95 9/26/95vj 6/5/95 9/27/95rs 5/23/95 9/25/95bw 5/31/95 10/3/95sp 6/6/95 10/4/95 Spring 1996 Fall 1996dw 5/23/96 9/17/96 fp 5/27/96 9/19/96vj 6/5/96 10/8/96rs 5/29/96 9/25/96bw 6/13/96 10/2/96sp 6/3/96 9/30/96 Spring 1997 Fall 1997dw 6/10/97 10/2/97 fp 6/11/97 10/8/97vj 6/5/97 10/14/97rs 6/12/97 10/16/97bw 6/4/97 10/15/97sp 7/15/97 10/22/97 Spring 1998 Fall 1998dw 6/8/98 9/15/98 fp 6/1/98 9/17/98vj 6/15/98 9/16/98 rs 7/8/98 9/29/98bw 6/11/98 10/6/98sp 6/30/98 10/8/98