Summary Information
The Effect of Kangaroo-Rat Activity on Plant Species Composition at the Sevilleta National Wildlife Refuge, New Mexico (1999)
Creator:
Individual: Gyuri Kroel-Dulay
Physical Address:
Phone: US
Email: gyuri@botanika.hu
Creator:
Individual: Debra Peters
Physical Address:
Delivery Address: Box 30003, MSC 3JER New Mexico State University Ecosystems Center
City: Las Cruces
Locality: NM
Postal Code: 88003
Phone: US
Phone: (575) 646-2777
Phone: (575) 646.5889
Email: debpeter@nmsu.edu
Creator:
Individual: Tamara Hochstrasser
Physical Address:
Delivery Address: Agriculture Builiding, University College Dublin Belfield
City: Dublin
Phone: IE
Phone: (531) 716-7719
Phone: (531) 716.1102
Email: tamara.hochstrasser@ucd.ie
Metadata Provider:
Individual: Information Manager Sevilleta LTER
Physical Address:
Delivery Address: 1 University of New Mexico
City: Albuquerque
Postal Code: 87131
Phone: US
Phone: (505) 277-2109
Phone: (505) 277.5355
Email: data-use@sevilleta.unm.edu
Associated Party:
Individual: Kristin Vanderbilt
Physical Address:
Delivery Address: Department of Biology, MSC03 2020, 1 University of New Mexico
City: Albuquerque
Locality: NM
Postal Code: 87131
Phone: US
Phone: (505) 277.5355
Email: vanderbi@sevilleta.unm.edu
Role: data manager
Publication Date: 2016-03-03
Language: English
Abstract:
Our objective was to evaluate the effects of kangaroo rat mounds on species diversity and composition at a semiarid-arid grassland ecotone. We expected that source populations of plants occurring on kangaroo rat mounds have important influences on the species composition of vegetation at the landscape scale, and that these influences differ by grassland type. Our study was conducted at the Sevilleta LTER in New Mexico, where a grassland type dominated by Bouteloua gracilis, a shortgrass steppe species, and a grassland type dominated by B. eriopoda, a desert grassland species, meet to form patches across the landscape. Four 0.4 ha plots were sampled for species diversity and composition in a regular 7m x 7m grid in each grassland type. Kangaroo rat mounds were also mapped and sampled for vegetation measures in four areas of 1.6 ha in each type. The landscape scale abundance of many subordinate species was increased significantly by populations occurring on kangaroo rat mounds in both grassland types. However, the area affected by the burrowing activity of kangaroo rats was twice as large in the B. eriopoda dominated grassland type. Furthermore, dominant plants on mounds in the B. eriopoda type were also abundant in off-mound areas whereas dominant plants on mounds in the B. gracilis type were not as abundant off-mound. These results indicate that the presence of mounds in the B. gracilis dominated type is creating islands of plant communities that are distinct from the rest of the grassland. Therefore, the occurrence of certain plant species in this grassland type may be intimately associated with the disturbance regime at this ecotone. This study demonstrates that effects of small burrowing animals may facilitate the coexistence of species at this ecotone.
Keywords:
Keyword: disturbance
Keyword: populations
Keyword Thesaurus: Core Areas
Keywords:
Keyword: community patterns
Keyword: plant communities
Keyword: plant species composition
Keyword: disturbances
Keyword: plant cover
Keyword: population and community properties
Keyword: plant species composition
Keyword: species interactions
Keyword: herbivory
Keyword: herbivory
Keyword: deserts
Keyword: grasslands
Keyword: small mammals
Keyword: grasses
Keyword: forbs
Keyword Thesaurus: LTER Controlled Vocabulary
Intellectual Rights:
Data Policies
This dataset is released to the public and may be freely downloaded. Please keep the designated contact person informed of any plans to use the dataset. Consultation or collaboration with the original investigators is strongly encouraged. Publications and data products that make use of the dataset must include proper acknowledgement of the Sevilleta LTER. A copy of any publications using these data must be supplied to the Sevilleta LTER Information Manager.
Distribution:
Online:
URL: http://sevdeims-d.lternet.edu/data/sev-169
Coverage:
Geographic Goverage:
Geographic Description: Deep Well is located on McKenzie Flats and is site of the longest running SEV LTER met station, number 40, which has been active since 1988.  In addition to studies of meteorological variables, core line-intercept vegetation transects and line-intercept transects from the 1995 & 2001 Deep Well fires are sampled here.  The mini-rhizotron study, blue and black grama compositional comparison, blue and black grama patch dynamics investigation, and kangaroo rat population assessement are all ongoing here.  Deep Well Blue/Black Grama Mixed is also the location of the warming and monsoon experiments, as well as portions of the line-intercept and vegetation removal studies. On August 4, 2009, a lightning-initiated fire began on the Sevilleta National Wildlife Refuge. By August 5, 2009, the fire had reached the area of Deep Well Blue/Black Grama Mixed.  While portions of this site were burned, the entirety was not.  See individual projects for further information on the effects of the fire.
Bounding Coordinates:
West Bounding Coordinates: -106.688
East Bounding Coordinates: -106.688
North Bounding Coordinates: 34.3591
South Bounding Coordinates: 34.3591
Bounding Altitude:
Altitude Minimum: 1600
Altitude Maximum: 1600
Altitude Units: meter
Geographic Goverage:
Geographic Description: McKenzie Flats is located within the northeastern section of the Sevilleta NWR, encompassing an area from Black Butte south to Palo Duro Canyon and east to the Los Pinos.
Bounding Coordinates:
West Bounding Coordinates: -106.691
East Bounding Coordinates: -106.691
North Bounding Coordinates: 34.3592
South Bounding Coordinates: 34.3592
Bounding Altitude:
Altitude Minimum: 1615
Altitude Maximum: 1615
Altitude Units: meter
Temporal Coverage:
Calendar Date: 1999-08-01
Contact:
Position Title: Information Manager
Organization: LTER Network Office
Physical Address:
Delivery Address: UNM Biology Department, MSC03-2020
Delivery Address: 1 University of New Mexico
City: Albuquerque
Locality: NM
Postal Code: 87131-0001
Phone: USA
Phone: 505 277-2535
Phone: 505 277-2541
Email: tech-support@lternet.edu
URL: http://www.lternet.edu
Contact:
Individual: Debra Peters
Physical Address:
Delivery Address: Box 30003, MSC 3JER New Mexico State University Ecosystems Center
City: Las Cruces
Locality: NM
Postal Code: 88003
Phone: US
Phone: (575) 646-2777
Phone: (575) 646.5889
Email: debpeter@nmsu.edu
Publisher:
Individual: Information Manager Sevilleta LTER
Physical Address:
Delivery Address: 1 University of New Mexico
City: Albuquerque
Postal Code: 87131
Phone: US
Phone: (505) 277-2109
Phone: (505) 277.5355
Email: data-use@sevilleta.unm.edu
Publication Place: Sevilleta LTER
Method Step:
Description:
Experimental Design - We selected eight stands, four dominated by Bouteloua eriopoda and four by Bouteloua gracilis (stands were marked with A1, A2, A3, A4 in the data set for the Bouteloua eriopoda type, and U1, U2, U3, U4 for Bouteloua gracilis type). Study areas were selected using aerial photos to ensure that they were located in well-defined black grama- or blue grama-dominated belts.  Study areas were 126 m x 126 m in size and were placed so that they contained a randomly selected, average-sized, and recently abandoned kangaroo rat mound in the center. Field Methods - In each patch type, we mapped all kangaroo-rat mounds and measured their size within the four 1.6 ha (126 m x 126 m) areas (total areas = 8). We classified each mound as active, recently abandoned, or old according to the level of small mammal activity. We noted the dominant and co-dominant plant species on each mound (i.e. species with at least 5% relative cover). In the center of each 1.6 ha plot, we estimated canopy cover (visual cover estimation) by species in 100 2m2 quadrats arranged in a regular 7 m x 7 m grid centered on a randomly selected and recently abandoned mound. Each grid covered a 63 m x 63 m area in the centre of the 1,6 ha stands. For each quadrat, we noted its location as being on a mound proper, at the edge of a mound, or in the off-mound vegetation.
Data Table:
Entity Name: sev169_krat_03072012
Entity Description: Data for SEV169, the effect of kangaroo-rat activity on plant species composition in central New Mexico.
Object Name: sev169_krat_07312012.txt
Size: 51232
Data Format:
Text Format:
Number of Header Lines: 1
Record Delimiter: \r\n
Attribute Orientation: column
Simple Delimited:
Field Delimiter: ,
Distribution:
Online:
URL: https://pasta.lternet.edu/package/data/eml/knb-lter-sev/169/192538/213b5b8292b2ee166de06c1fe946093f
Coverage:
Temporal Coverage:
Calendar Date: 2012-03-07
Attribute List:
Attribute Name: patch
Attribute Label: Patch
Attribute Definition: The number of the patch sampled.
Storage Type: string
Measurement Scale:
Nominal:
Non Numeric Domain:
Enumerated Domain:
Code Definition:
Code: 1
Definition: black grama patch
Code Definition:
Code: 2
Definition: blue grama patch
Attribute Name: mound#
Attribute Label: Mound #
Attribute Definition: The number of the mound associated with a sampled location.
Storage Type: string
Measurement Scale:
Nominal:
Non Numeric Domain:
Text Domain:
Definition: The number of the mound associated with a sampled location.
Attribute Name: transect#
Attribute Label: Transect #
Attribute Definition: The number of the transect along which sampling occurred.
Storage Type: string
Measurement Scale:
Nominal:
Non Numeric Domain:
Text Domain:
Definition: The number of the transect along which sampling occurred.
Attribute Name: distance_from_mound
Attribute Label: Distance from Mound
Attribute Definition: The distance that a location sampled is from the associated kangaroo rat mound.
Measurement Scale:
Ratio:
Unit:
Custom Unit: meters
Precision: 0.5
Numeric Domain:
Number Type: real
Bounds:
Minimum: 0
Maximum: 25
Attribute Name: location
Attribute Label: Location
Attribute Definition: The numerical representation of the position of a sampled location.
Storage Type: string
Measurement Scale:
Nominal:
Non Numeric Domain:
Enumerated Domain:
Code Definition:
Code: 1
Definition: on mound
Code Definition:
Code: 2
Definition: transition zone
Code Definition:
Code: 3
Definition: off mound
Attribute Name: %bogr
Attribute Label: %bogr
Attribute Definition: The percent cover of blue grama (Bouteloua gracilis) observed at a sampled location.
Measurement Scale:
Ratio:
Unit:
Custom Unit: percentage
Precision: 1
Numeric Domain:
Number Type: real
Bounds:
Minimum: 0
Maximum: 49
Attribute Name: %boer
Attribute Label: %boer
Attribute Definition: The percent cover of black grama (Bouteloua eriopoda) observed at a sampled location.
Measurement Scale:
Ratio:
Unit:
Custom Unit: percentage
Precision: 1
Numeric Domain:
Number Type: real
Bounds:
Minimum: 0
Maximum: 73
Attribute Name: %gusa
Attribute Label: %gusa
Attribute Definition: The percent cover of snakeweed (Gutierrezia sarothrae) observed at a sampled location.
Measurement Scale:
Ratio:
Unit:
Custom Unit: percentage
Precision: 1
Numeric Domain:
Number Type: real
Bounds:
Minimum: 0
Maximum: 16
Attribute Name: n_gusa
Attribute Label: n_gusa
Attribute Definition: The number (density) of snakeweed (Gutierrezia sarothrae) plants observed at a sampled location.
Storage Type: string
Measurement Scale:
Nominal:
Non Numeric Domain:
Text Domain:
Definition: The number (density) of snakeweed (Gutierrezia sarothrae) plants observed at a sampled location.
Attribute Name: %herbs+sub-shrubs
Attribute Label: %herbs+sub-shrubs
Attribute Definition: The percent of herbaceous plants and sub-shrubs observed at a sampled location.
Measurement Scale:
Ratio:
Unit:
Custom Unit: percentage
Precision: 1
Numeric Domain:
Number Type: real
Bounds:
Minimum: 0
Maximum: 26
Attribute Name: n_herbs+sub-shrubs
Attribute Label: n_herbs+sub-shrubs
Attribute Definition: The number (density) of herbaceous plants and sub-shrubs observed at a sampled location.
Storage Type: string
Measurement Scale:
Nominal:
Non Numeric Domain:
Text Domain:
Definition: The number (density) of herbaceous plants and sub-shrubs observed at a sampled location.
Attribute Name: %cacti
Attribute Label: %cacti
Attribute Definition: The percent cover of cacti observed at a sampled location.
Measurement Scale:
Ratio:
Unit:
Custom Unit: percentage
Precision: 1
Numeric Domain:
Number Type: real
Bounds:
Minimum: 0
Maximum: 5
Attribute Name: n_cacti
Attribute Label: n_cacti
Attribute Definition: The number (density) of cacti plants observed at a sampled location.
Storage Type: string
Measurement Scale:
Nominal:
Non Numeric Domain:
Text Domain:
Definition: The number (density) of cacti plants observed at a sampled location.
Attribute Name: %yugl
Attribute Label: %yugl
Attribute Definition: The percent cover of Yucca glauca observed at a sampled location.
Measurement Scale:
Ratio:
Unit:
Custom Unit: percentage
Precision: 1
Numeric Domain:
Number Type: real
Bounds:
Minimum: 0
Maximum: 58
Attribute Name: n_yugl
Attribute Label: n_yugl
Attribute Definition: The number (density) of Yucca glauca plants observed at a sampled location.
Storage Type: string
Measurement Scale:
Nominal:
Non Numeric Domain:
Text Domain:
Definition: The number (density) of Yucca glauca plants observed at a sampled location.
Attribute Name: %_other_grass
Attribute Label: %_other_grass
Attribute Definition: The percent cover of unidentified grass species observed at a sampled location. For SEV169, this variable is redundant with "combined grass."
Measurement Scale:
Ratio:
Unit:
Custom Unit: percentage
Precision: 1
Numeric Domain:
Number Type: real
Bounds:
Minimum: 0
Maximum: 26
Attribute Name: %hija
Attribute Label: %hija
Attribute Definition: The percent cover of James' galleta (Hilaria jamesii, now Pleuraphis jamesii) observed at a sampled location.
Measurement Scale:
Ratio:
Unit:
Custom Unit: percentage
Precision: 1
Numeric Domain:
Number Type: real
Bounds:
Minimum: 0
Maximum: 16
Attribute Name: %spfl
Attribute Label: %spfl
Attribute Definition: The percent cover of mesa dropseed (Sporobolus flexuosus) observed at a sampled location.
Measurement Scale:
Ratio:
Unit:
Custom Unit: percentage
Precision: 1
Numeric Domain:
Number Type: real
Bounds:
Minimum: 0
Maximum: 5
Attribute Name: %arpu
Attribute Label: %arpu
Attribute Definition: The percent cover of purple three-awn (Aristida purpurea) observed at a sampled location.
Measurement Scale:
Ratio:
Unit:
Custom Unit: percentage
Precision: 1
Numeric Domain:
Number Type: real
Bounds:
Minimum: 0
Maximum: 11
Attribute Name: %epvi
Attribute Label: %epvi
Attribute Definition: The percent cover of mormon tea (Ephedra viridis) observed at a sampled location.
Measurement Scale:
Ratio:
Unit:
Custom Unit: percentage
Precision: 1
Numeric Domain:
Number Type: real
Bounds:
Minimum: 0
Maximum: 17
Attribute Name: n_epvi
Attribute Label: n_epvi
Attribute Definition: The number (density) of mormon tea (Ephedra viridis) plants observed at a sampled location.
Storage Type: string
Measurement Scale:
Nominal:
Non Numeric Domain:
Text Domain:
Definition: The number (density) of mormon tea (Ephedra viridis) plants observed at a sampled location.
Attribute Name: %combined grass
Attribute Label: %combined_grass
Attribute Definition: The percent cover of unidentified grass species observed at a sampled location. For SEV169, this variable is redundant with "% other grass."
Measurement Scale:
Ratio:
Unit:
Custom Unit: percentage
Precision: 1
Numeric Domain:
Number Type: real
Bounds:
Minimum: 0
Maximum: 26
Attribute Name: %bare ground+litter
Attribute Label: %bare_ground+litter
Attribute Definition: The percent cover of bare ground and litter observed at a sampled location.
Measurement Scale:
Ratio:
Unit:
Custom Unit: percentage
Precision: 1
Numeric Domain:
Number Type: real
Bounds:
Minimum: 0
Maximum: 100
Attribute Name: %F+S+S
Attribute Label: %F+S+S
Attribute Definition: The sum of %gusa, %herbs+sub-shrubs. %cacti, %yugl, and %epvi (i.e., forbs and sub-shrubs) observed at a sampled location.
Measurement Scale:
Ratio:
Unit:
Custom Unit: percentage
Precision: 1
Numeric Domain:
Number Type: real
Bounds:
Minimum: 0
Maximum: 66
Attribute Name: #F+S+S
Attribute Label: #F+S+S
Attribute Definition: The sum of n gusa, n herbs+sub-shrubs, n cacti, n yugl, and n epvi (i.e., forbs and sub-shrubs) observed at a sampled location.
Storage Type: string
Measurement Scale:
Nominal:
Non Numeric Domain:
Text Domain:
Definition: The sum of n gusa, n herbs+sub-shrubs, n cacti, n yugl, and n epvi (i.e., forbs and sub-shrubs) observed at a sampled location.
Attribute Name: total
Attribute Label: Total
Attribute Definition: The total percentage of vegetative cover (i.e., 100-%bare ground+litter) observed at a sampled location.
Measurement Scale:
Ratio:
Unit:
Custom Unit: percentage
Precision: 1
Numeric Domain:
Number Type: real
Bounds:
Minimum: 0
Maximum: 74
Attribute Name: diameter1
Attribute Label: Diameter1 (m)
Attribute Definition: The first measured diameter of a mound associated with a sampling location.
Measurement Scale:
Ratio:
Unit:
Custom Unit: meters
Precision: 0.01
Numeric Domain:
Number Type: real
Bounds:
Minimum: 2.3
Maximum: 4.82
Attribute Name: diameter2
Attribute Label: Diameter2
Attribute Definition: The diameter perpendicular to "diameter1" of a mound associated with a sampling location.
Measurement Scale:
Ratio:
Unit:
Custom Unit: meters
Precision: 0.01
Numeric Domain:
Number Type: real
Bounds:
Minimum: 2.86
Maximum: 5.7
Attribute Name: mound_area
Attribute Label: Mound Area
Attribute Definition: The area of a mound associated with a sampled location.
Measurement Scale:
Ratio:
Unit:
Custom Unit: square meters
Precision: 0.01
Numeric Domain:
Number Type: real
Bounds:
Minimum: 5.56
Maximum: 19.4
Attribute Name: fill_numbers
Attribute Label: Fill Numbers
Attribute Definition: The sequential number associated with a sampling event for SEV169, the effect of kangaroo-rat activity on plant species composition in central New Mexico.
Storage Type: string
Measurement Scale:
Nominal:
Non Numeric Domain:
Text Domain:
Definition: The sequential number associated with a sampling event for SEV169, the effect of kangaroo-rat activity on plant species composition in central New Mexico.