| Summary Information |
| Livestock Exclosure Nutrient Study from a Chihuahuan Desert Grassland at the Sevilleta
National Wildlife Refuge, New Mexico (2003)
|
| Creator: |
| Individual: |
Lydia Zeglin |
| Physical Address: |
| Delivery Address: |
, |
| Phone: |
US |
|
| Email: |
lydia.zeglin@oregonstate.edu |
|
| 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 |
|
| Publication Date: |
2016-03-03 |
| Language: |
English |
| Abstract: |
| Data on soil characteristics and dominant grass and soil chemical composition gathered
on active rangeland, livestock exclosures on active rangeland, and the Sevilleta NWR.
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|
|
| Keywords: |
| Keyword: |
disturbance |
| Keyword: |
inorganic nutrients |
| Keyword Thesaurus: |
Core Areas |
|
| Keywords: |
| Keyword: |
soil texture |
| Keyword: |
grazing |
| Keyword: |
grazing |
| Keyword: |
nutrients |
| Keyword: |
organic matter |
| Keyword: |
water |
| Keyword: |
soil |
| Keyword: |
grasslands |
| Keyword: |
grasses |
| Keyword Thesaurus: |
LTER Controlled Vocabulary |
|
| Additional Information: |
| Additional field crew member: Ben Zimmerman Additional Study Area Information Study
Area Name: Pino Gate Study Area Location: The study site was located near the base
of the Los Pinos mountains and directly adjacent to the nothern fencline of the SNWR
at Pino GateElevation: 1600 m Vegetation: Burrograss (Scleropogon brevifolius), sand
dropseed (Sporobolus ryptandrus), and black grama (Bouteloua eriopoda) were the dominant
vegetation. Soils: Deep clayey loam soilsGeology: On an upper bajada slope, in a broad
swale Climate: Long-term mean annual precipitation is 243 mm, about 60% of which occurs
during the summer. Long-term mean monthly temperatures for January and July are 1.5°C
and 25.1°C, respectively. Site history: Historically, prairie dogs were common throughout
the area, but were exterminated by the early 1970’s (John Ford, United States Department
of Agriculture Wildlife Services, personal communication). Gunnison’s prairie dogs
began to re-colonize the study site from adjacent private land in 1998. During our
study, the colony occurred within a 5 ha area, near the base of the Los Piños Mountains
in an area with deep clayey loam soils. The site has been long inhabited by kangaroo
rats, and represents typical northern Chihuahuan Desert grassland.North Coordinate:34.406954South
Coordinate:34.406954East Coordinate:-106.606269West Coordinate:-106.606269 Additional
Metadata Animal grazers affect grassland disturbance patterns via changes in plant
community composition and structure, nutrient cycling, and soil structure. Human-managed
livestock grazing is a significant grassland disturbance worldwide.Research Questions/Hypotheses:
a. Is livestock grazing related to changes in arid grassland soil structure and chemical
composition or plant nutrient composition? If so, how? (hypothesis) Grazed rangeland
will have more compact soil (lower water holding capacity), lower levels of nutrients
(C, N, P) and lower organic matter content than grassland unaffected by livestock
grazing. Grazed rangeland will produce grasses of lower nutritional quality (i.e.
higher C:N and C:P ratios) than grassland unaffected by livestock grazing. b. When
livestock are exclosed from a rangeland, does soil structure and chemical composition
or plant nutrient composition `recover', exhibit resilience, align more closely with
values characteristic of grassland unaffected by livestock grazing?(hypothesis) Within
livestock exclosures (free of livestock for 9 years) soil water holding capacity will
be higher, levels of nutrients (C, N, P) and organic matter content will be higher,
and plant nutritional quality will be higher (C:N and C:P ratios will be lower) than
on grazed rangeland. These structural and chemical characteristics will be intermediate
between those of grazed rangeland and grassland unaffected by livestock grazing.
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|
| 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.
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|
| Distribution: |
| Online: |
| URL: |
http://sevdeims-d.lternet.edu/data/sev-159 |
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| Coverage: |
| Geographic Goverage: |
| Geographic Description: |
Cattle pastures are currently grazed, exclosures added in 1993. Plots are located
on both sides of the dirt road in the cattle pasture.
|
| Bounding Coordinates: |
| West Bounding Coordinates: |
-106.61 |
| East Bounding Coordinates: |
-106.61 |
| North Bounding Coordinates: |
34.416 |
| South Bounding Coordinates: |
34.416 |
| Bounding Altitude: |
| Altitude Minimum: |
1600 |
| Altitude Maximum: |
1600 |
| Altitude Units: |
meter |
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|
| Geographic Goverage: |
| Geographic Description: |
On the eastern side of McKenzie and Nunn Flats areas just west of the Los Pinos Mountains |
| Bounding Coordinates: |
| West Bounding Coordinates: |
-106.609 |
| East Bounding Coordinates: |
-106.609 |
| North Bounding Coordinates: |
34.406 |
| South Bounding Coordinates: |
34.406 |
| Bounding Altitude: |
| Altitude Minimum: |
1600 |
| Altitude Maximum: |
1600 |
| Altitude Units: |
meter |
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| Temporal Coverage: |
| Date Range: |
| Begin Date: |
| Calendar Date: |
2003-08-01 |
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| End Date: |
| Calendar Date: |
2003-09-01 |
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|
| 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: |
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 |
|
| 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 This study compares grazed grassland (treatment G), grassland
within livestock exclosures (treatment X) and undisturbed (by livestock) grassland
(treatment S - for Sevilleta). During the winter of 1992/1993, three 300m x 300m plots
were delineated for each of these three treatments. Plots are referred to as G1, G2,
G3, X1, X2, X3, S1, S2, and S3 (number increasing from west to east). Each of these
nine plots are separated by at least 300 m. Exclosure plots are surrounded by wire
fencing, and the Sevilleta plots are located within the NWR boundary. A rodent trapping
web is centered within each plot. Within the framework of this mammal trapping web,
twelve 3x4 m quadrats were randomly placed. Corners of plots are marked by aluminum
fence posts and locations were recorded with GPS. Centers and lines of mammal trapping
webs are marked by 1m high (centers and end of lines) and .25m high (lines) rebar
and aluminum numbered tags. Corners of quadrats are marked by short rebar. The location
of mammal trapping webs and quadrats is the same within each plot. For this particular
study a subsample of four quadrats, chosen randomly for each plot, within each plot
was sampled. Data collected include soil texture, field water content, 50% water holding
capacity, organic matter content, percent C, percent N, percent P, and dominant grass
(usually Bouteloua eriopoda) percent C, percent N, and percent P. Soil samples were
collected as cores to 10cm depth, with 5-10 cores taken along a diagonal from one
corner of the quadrat to the other corner, then pooled in a plastic bag as one sample
from each quadrat. Grass samples of green above-ground tissue (growth from summer/fall
03) include tissue from 5-10 individual plants within the quadrat. All analyses were
conducted for each quadrat excepting soil texture, for which equal weights of soil
from each quadrat were pooled into one sample per plot. Soil samples were collected
on 8/10/03 and plant samples were collected on 10/18/03, before and after the most
significant rains of the season. Soil texture was analyzed using the hydrometer method,
and data are recorded as sand, silt, and clay. Soil field water content was measured
as the difference in weight before and after the drying of a subsample of soil. Soil
organic matter was measured as the difference in weight before and after combustion
of a subsample of dry soil. Soil 50% water holding capacity was measured using standard
Sevilleta techniques (after White). Soil and plant percent C and N were measured using
a Carlo Erba AutoAnalyzer. Soil and plant percent P was measured as extractable P,
converted to PO4-P, using a Technicon AutoAnalyzer.
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| Data Table: |
| Entity Name: |
sev159_exclosnutrient_09212005.txt |
| Entity Description: |
Data for the Livestock Exclosure Nutrient Study |
| Object Name: |
sev159_exclosnutrient_09212005.txt |
| Size: |
4186 |
| Data Format: |
| Text Format: |
| Number of Header Lines: |
1 |
| Record Delimiter: |
\r\n |
| Attribute Orientation: |
column |
| Simple Delimited: |
| Field Delimiter: |
, |
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|
| Distribution: |
| Online: |
| URL: |
https://pasta.lternet.edu/package/data/eml/knb-lter-sev/159/220447/18751ec5eba50ab4a36bf3f1c1507ab9 |
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|
| Coverage: |
| Temporal Coverage: |
| Date Range: |
| Begin Date: |
| Calendar Date: |
2003-08-01 |
|
| End Date: |
| Calendar Date: |
2003-09-01 |
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| Attribute List: |
| Attribute Name: |
treatment |
| Attribute Label: |
treatment |
| Attribute Definition: |
Grazing disturbance level |
| Storage Type: |
string |
| Measurement Scale: |
| Nominal: |
| Non Numeric Domain: |
| Enumerated Domain: |
| Code Definition: |
| Code: |
G |
| Definition: |
grazed |
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| Code Definition: |
| Code: |
X |
| Definition: |
exclosure |
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| Code Definition: |
| Code: |
S |
| Definition: |
Sevilleta |
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|
| Attribute Name: |
plot |
| Attribute Label: |
plot |
| Attribute Definition: |
plot from which data were collected |
| Storage Type: |
string |
| Measurement Scale: |
| Nominal: |
| Non Numeric Domain: |
| Text Domain: |
| Definition: |
plot from which data were collected |
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|
| Attribute Name: |
quad |
| Attribute Label: |
quad |
| Attribute Definition: |
The quadrat at which data was collected. |
| Storage Type: |
string |
| Measurement Scale: |
| Nominal: |
| Non Numeric Domain: |
| Text Domain: |
| Definition: |
The quadrat at which data was collected. |
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| Attribute Name: |
pct_sand |
| Attribute Label: |
pct_sand |
| Attribute Definition: |
soil texture percent sand |
| Measurement Scale: |
| Ratio: |
| Unit: |
|
| Custom Unit: |
percent |
| Numeric Domain: |
| Number Type: |
real |
| Bounds: |
| Minimum: |
100 |
| Maximum: |
0 |
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| Missing Value Code: |
| Code: |
* |
| Code Explanation: |
missing |
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| Attribute Name: |
pct_silt |
| Attribute Label: |
pct_silt |
| Attribute Definition: |
soil texture percent silt |
| Measurement Scale: |
| Ratio: |
| Unit: |
|
| Custom Unit: |
percent |
| Numeric Domain: |
| Number Type: |
real |
| Bounds: |
| Minimum: |
0 |
| Maximum: |
100 |
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|
| Missing Value Code: |
| Code: |
* |
| Code Explanation: |
missing |
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| Attribute Name: |
pct_clay |
| Attribute Label: |
pct_clay |
| Attribute Definition: |
soil texture percent clay |
| Measurement Scale: |
| Ratio: |
| Unit: |
|
| Custom Unit: |
percent |
| Numeric Domain: |
| Number Type: |
real |
| Bounds: |
| Minimum: |
0 |
| Maximum: |
100 |
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| Missing Value Code: |
| Code: |
* |
| Code Explanation: |
missing |
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| Attribute Name: |
soil_fwc |
| Attribute Label: |
soil_fwc |
| Attribute Definition: |
soil field water content |
| Measurement Scale: |
| Ratio: |
| Unit: |
|
| Custom Unit: |
gramPerGram |
| Numeric Domain: |
| Number Type: |
real |
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|
| Missing Value Code: |
| Code: |
na |
| Code Explanation: |
missing |
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| Attribute Name: |
soil_om |
| Attribute Label: |
soil_om |
| Attribute Definition: |
soil organic matter content |
| Measurement Scale: |
| Ratio: |
| Unit: |
|
| Custom Unit: |
gramPerGram |
| Numeric Domain: |
| Number Type: |
real |
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| Missing Value Code: |
| Code: |
na |
| Code Explanation: |
missing |
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| Attribute Name: |
soil_50pctwhc |
| Attribute Label: |
soil_50pctwhc |
| Attribute Definition: |
soil 50% water holding capacity |
| Measurement Scale: |
| Ratio: |
| Unit: |
|
| Custom Unit: |
gramPerGram |
| Numeric Domain: |
| Number Type: |
real |
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| Missing Value Code: |
| Code: |
na |
| Code Explanation: |
missing |
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| Attribute Name: |
soil_pctC |
| Attribute Label: |
soil_pctC |
| Attribute Definition: |
soil percent C by mass |
| Measurement Scale: |
| Ratio: |
| Unit: |
|
| Custom Unit: |
percent |
| Numeric Domain: |
| Number Type: |
real |
| Bounds: |
| Minimum: |
0 |
| Maximum: |
100 |
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| Missing Value Code: |
| Code: |
na |
| Code Explanation: |
missing |
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| Attribute Name: |
soil_pctN |
| Attribute Label: |
soil_pctN |
| Attribute Definition: |
soil percent N by mass |
| Measurement Scale: |
| Ratio: |
| Unit: |
|
| Custom Unit: |
percent |
| Numeric Domain: |
| Number Type: |
real |
| Bounds: |
| Minimum: |
0 |
| Maximum: |
100 |
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|
| Missing Value Code: |
| Code: |
na |
| Code Explanation: |
missing |
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| Attribute Name: |
soil_pctP |
| Attribute Label: |
soil_pctP |
| Attribute Definition: |
soil percent P by mass |
| Measurement Scale: |
| Ratio: |
| Unit: |
|
| Custom Unit: |
percent |
| Numeric Domain: |
| Number Type: |
real |
| Bounds: |
| Minimum: |
0 |
| Maximum: |
100 |
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|
|
|
| Missing Value Code: |
| Code: |
* |
| Code Explanation: |
missing |
|
| Attribute Name: |
soil_c_n |
| Attribute Label: |
soil_c_n |
| Attribute Definition: |
Soil C:N ratio |
| Storage Type: |
string |
| Measurement Scale: |
| Nominal: |
| Non Numeric Domain: |
| Text Domain: |
| Definition: |
Soil C:N ratio |
|
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|
|
| Attribute Name: |
soil_c_p |
| Attribute Label: |
soil_c_p |
| Attribute Definition: |
soil C:P ratio |
| Storage Type: |
string |
| Measurement Scale: |
| Nominal: |
| Non Numeric Domain: |
| Text Domain: |
| Definition: |
soil C:P ratio |
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| Attribute Name: |
soil_n_p |
| Attribute Label: |
soil_n_p |
| Attribute Definition: |
soil N:P ratio |
| Storage Type: |
string |
| Measurement Scale: |
| Nominal: |
| Non Numeric Domain: |
| Text Domain: |
| Definition: |
soil N:P ratio |
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|
| Attribute Name: |
grass_pctC |
| Attribute Label: |
grass_pctC |
| Attribute Definition: |
grass percent C by mass |
| Measurement Scale: |
| Ratio: |
| Unit: |
|
| Custom Unit: |
percent |
| Numeric Domain: |
| Number Type: |
real |
| Bounds: |
| Minimum: |
0 |
| Maximum: |
100 |
|
|
|
|
| Missing Value Code: |
| Code: |
* |
| Code Explanation: |
missing |
|
| Attribute Name: |
grass_pctN |
| Attribute Label: |
grass_pctN |
| Attribute Definition: |
grass percent N by mass |
| Measurement Scale: |
| Ratio: |
| Unit: |
|
| Custom Unit: |
percent |
| Numeric Domain: |
| Number Type: |
real |
| Bounds: |
| Minimum: |
0 |
| Maximum: |
100 |
|
|
|
|
| Missing Value Code: |
| Code: |
* |
| Code Explanation: |
missing |
|
| Attribute Name: |
grass_pctP |
| Attribute Label: |
grass_pctP |
| Attribute Definition: |
grass percent P by mass |
| Measurement Scale: |
| Ratio: |
| Unit: |
|
| Custom Unit: |
percent |
| Numeric Domain: |
| Number Type: |
real |
| Bounds: |
| Minimum: |
0 |
| Maximum: |
100 |
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|
| Missing Value Code: |
| Code: |
* |
| Code Explanation: |
missing |
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| Attribute Name: |
grass_c_n |
| Attribute Label: |
grass_c_n |
| Attribute Definition: |
grass C:N ratio |
| Storage Type: |
string |
| Measurement Scale: |
| Nominal: |
| Non Numeric Domain: |
| Text Domain: |
| Definition: |
grass C:N ratio |
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|
| Attribute Name: |
grass_c_p |
| Attribute Label: |
grass_c_p |
| Attribute Definition: |
grass C:P ratio |
| Storage Type: |
string |
| Measurement Scale: |
| Nominal: |
| Non Numeric Domain: |
| Text Domain: |
| Definition: |
grass C:P ratio |
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| Attribute Name: |
grass_n_p |
| Attribute Label: |
grass_n_p |
| Attribute Definition: |
grass N:P ratio |
| Storage Type: |
string |
| Measurement Scale: |
| Nominal: |
| Non Numeric Domain: |
| Text Domain: |
| Definition: |
grass N:P ratio |
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