Summary Information
Nitrogen Fertilization Experiment (NFert): Seasonal Biomass and Seasonal and Annual NPP Data at the Sevilleta National Wildlife Refuge, New Mexico (2004- present)
Creator:
Individual: Scott Collins
Physical Address:
Delivery Address: Department of Biology, MSC03 2020, 1 University of New Mexico
City: Albuquerque
Locality: NM
Postal Code: 87131
Phone: US
Email: scollins@sevilleta.unm.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
Associated Party:
Individual: Douglas I. Moore
Physical Address:
Delivery Address: Sevilleta LTER, 167 Castetter Hall, University of New Mexico
City: Albuquerque
Locality: NM
Postal Code: 87131
Phone: US
Email: dmoore@sevilleta.unm.edu
Role: data manager
Associated Party:
Individual: Stephanie Baker
Physical Address:
Delivery Address: Department of Biology
City: Albuquerque
Locality: NM
Postal Code: 87131
Phone: US
Phone: (505) 277-8119
Email: srbaker@sevilleta.unm.edu
Role: field crew
Associated Party:
Individual: Megan McClung
Organization: Sevilleta LTER
Physical Address:
Delivery Address: 1 University of New Mexico, 167 Castetter Hall, MSC03 2020
City: Albuquerque
Locality: NM
Postal Code: 87131
Phone: US
Email: mmcclung@sevilleta.unm.edu
Role: field crew
Associated Party:
Individual: Chandra Tucker
Physical Address:
Phone: US
Email: ctucker@sevilleta.unm.edu
Role: field crew
Publication Date: 2016-03-09
Language: English
Abstract:
Begun in spring 2004, this long-term study at the Sevilleta LTER examines how fertilization affects above-ground biomass production (ANPP) in a mixed desert-grassland. Net primary production is a fundamental ecological variable that quantifies rates of carbon consumption and fixation. Estimates of NPP are important in understanding energy flow at a community level as well as spatial and temporal responses to a range of ecological processes.  While measures of both below- and above-ground biomass are important in estimating total NPP, this study focuses on above-ground net primary production (ANPP). Above-ground net primary production is the change in plant biomass, including loss to death and decomposition, over a given period of time. Volumetric measurements are made using vegetation data from permanent plots (SEV155, "Nitrogen Fertilization Experiment (NFert): Net Primary Production Quadrat Data") and regressions correlating species biomass and volume constructed using seasonal harvest weights from SEV157, "Net Primary Productivity (NPP) Weight Data." This site was burned by a prescribed fire in 2003.
Keywords:
Keyword: primary production
Keyword Thesaurus: Core Areas
Keywords:
Keyword: plant communities
Keyword: plant species composition
Keyword: plant cover
Keyword: net primary productivity
Keyword: annual net primary production
Keyword: plant biomass
Keyword: aboveground biomass
Keyword: long term
Keyword: seasonality
Keyword: permanent plots
Keyword: fertilization
Keyword: harvesting
Keyword: fertilizer
Keyword: deserts
Keyword: grasslands
Keyword: grasses
Keyword: herbs
Keyword: forbs
Keyword: shrubs
Keyword Thesaurus: LTER Controlled Vocabulary
Additional Information:
Other researchers involved with collecting samples/data:  Chandra Tucker (CAT; 04/2014-present), Megan McClung (MAM; 04/2013-present), Stephanie Baker (SRB; 09/2010-present), John Mulhouse (JMM; 08/2010-06/2013), Amaris Swann (ALS; 08/2008-01/2013), Maya Kapoor (MLK; 08/2003-01/2005, 05/2010-03/2011), Terri Koontz (TLK; 02/2000-08/2003, 08/2006-08/2010), Yang Xia (YX; 01/2005-03/2010), Karen Wetherill (KRW; 02/2000-08/2009); Michell Thomey (MLT; 09/2005-08/2008); Seth Munson (SMM; 09/2002-06/2004), Jay McLeod (JRM; 01/2006-08/2006); Caleb Hickman (CRH; 09/2002-11/2004), Charity Hall (CLH; 01/2005-01/2006).
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://sev.lternet.edu/data/sev-186
Coverage:
Geographic Goverage:
Geographic Description: The Black Butte Mixed Grass site is located just inside the gate and to the south of Black Butte. This site is grassland, characterized by Oryzopsis hymenoides, Sporobolus giganteus, Sporobolus flexuosus, Bouteloua eriopoda, and occasional shrubs, including Gutierrezia sarothrae and Yucca glauca.  Forbs include Senecio douglasii, Baileyi multiradiata, and Sphaeralcea spp. This site contains the fertilizer study plots, which are located less than one mile from the Black Butte gate on the east side of the road to Five Points.
Bounding Coordinates:
West Bounding Coordinates: -106.683
East Bounding Coordinates: -106.683
North Bounding Coordinates: 34.408
South Bounding Coordinates: 34.408
Bounding Altitude:
Altitude Minimum: 1666
Altitude Maximum: 1666
Altitude Units: meter
Geographic Goverage:
Geographic Description: The fertilizer plots are located less than one mile from the Black Butte gate on the east side of the road to Five Points.
Bounding Coordinates:
West Bounding Coordinates: -106.677
East Bounding Coordinates: -106.677
North Bounding Coordinates: 34.4012
South Bounding Coordinates: 34.4012
Bounding Altitude:
Altitude Minimum: 1666
Altitude Maximum: 1666
Altitude Units: meter
Temporal Coverage:
Date Range:
Begin Date:
Calendar Date: 2004-03-01
End Date:
Calendar Date: 2014-12-31
Maintenance Information:
Description:
01/07/2010 Data QAQC'ed, metadata updated and compiled for 2004-2009. -YX02/05/09 Metadata created and compiled for 2004, 2005, 2006, 2007, and 2008 data. -YX02/05/09 From 2007, winter measurement was no longer been taken. -YX05/16/2005 Season 3, Plot 11 data didn't distinguish between quads 3 and 4. Original data were checked and this error was corrected. -KLV
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:
Organization: Sevilleta Long Term Ecological Research (LTER) Project
URL: http://sev.lternet.edu
Publication Place: Sevilleta LTER
Method Step:
Description:
Data Processing Techniques to Derive Biomass and NPP: Data from SEV155 and SEV157 are used used to calculate seasonal and annual production of each species in each quadrat for a given year. Allometric equations derived from harvested samples of each species for each season are applied to the measured cover, height, and count of each species in each quadrat. This provides seasonal biomass for winter, spring, and fall. Seasonal NPP is derived by subtracting the previous season's biomass from the biomass for the current season. For example, spring NPP is calculated by subtracting the winter weight from the spring weight for each species in a given quadrat. Negative differences are considered to be 0. Likewise, fall production is computed by subtracting spring biomass from fall biomass. Annual biomass is taken as the sum of spring and fall NPP.
Data Table:
Entity Name: sev186_fertilizerbiomass_20150814.txt
Entity Description: Seasonal biomass and seasonal and annual npp data for the fertilizer study.
Object Name: sev186_fertilizerbiomass_20150826.txt
Size: 384920
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/186/208429/2c8b5b46b8279e48bd27f8e60528271d
Coverage:
Temporal Coverage:
Date Range:
Begin Date:
Calendar Date: 2004-03-01
End Date:
Calendar Date: 2013-10-30
Attribute List:
Attribute Name: year
Attribute Label: year
Attribute Definition: The year in which data was collected.
Storage Type: date
Measurement Scale:
Datetime:
Format String: YYYY
Attribute Name: site
Attribute Label: site
Attribute Definition: The site at which data was collected.
Storage Type: string
Measurement Scale:
Nominal:
Non Numeric Domain:
Enumerated Domain:
Code Definition:
Code: F
Definition: fertilizer site
Attribute Name: treatment
Attribute Label: treatment
Attribute Definition: The experimental regime applied to the project.
Storage Type: string
Measurement Scale:
Nominal:
Non Numeric Domain:
Enumerated Domain:
Code Definition:
Code: F
Definition: fertilized and burned
Code Definition:
Code: C
Definition: unfertilized and burned
Attribute Name: plot
Attribute Label: plot
Attribute Definition: The plot at which data was collected.
Storage Type: string
Measurement Scale:
Nominal:
Non Numeric Domain:
Text Domain:
Definition: The plot at which data was collected.
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.
Attribute Name: species
Attribute Label: species
Attribute Definition: The Kartez code for a plant species as designated by the USDA Plants Database.
Storage Type: string
Measurement Scale:
Nominal:
Non Numeric Domain:
Text Domain:
Definition: The Kartez code for a plant species as designated by the USDA Plants Database.
Attribute Name: wwt
Attribute Label: wwt
Attribute Definition: The calculated weight of live green biomass for a species in a quadrat in the winter.
Measurement Scale:
Ratio:
Unit:
Standard Unit: gramsPerSquareMeter
Precision: 0.01
Numeric Domain:
Number Type: real
Attribute Name: swt
Attribute Label: swt
Attribute Definition: The calculated weight of live green biomass for a species in a quadrat in the spring.
Measurement Scale:
Ratio:
Unit:
Standard Unit: gramsPerSquareMeter
Precision: 0.01
Numeric Domain:
Number Type: real
Attribute Name: fwt
Attribute Label: fwt
Attribute Definition: The calculated weight of live green biomass for a species in a quadrat in the fall.
Measurement Scale:
Ratio:
Unit:
Standard Unit: gramsPerSquareMeter
Precision: 0.01
Numeric Domain:
Number Type: real
Attribute Name: snpp
Attribute Label: snpp
Attribute Definition: The calculated primary production of a species in a quadrat in the spring.
Measurement Scale:
Ratio:
Unit:
Standard Unit: gramsPerSquareMeter
Precision: 0.01
Numeric Domain:
Number Type: real
Attribute Name: fnpp
Attribute Label: fnpp
Attribute Definition: The calculated primary production of a species in a quadrat in the fall.
Measurement Scale:
Ratio:
Unit:
Standard Unit: gramsPerSquareMeter
Precision: 0.01
Numeric Domain:
Number Type: real
Attribute Name: anpp
Attribute Label: anpp
Attribute Definition: The calculated annual primary production of a species in a quadrat.
Measurement Scale:
Ratio:
Unit:
Standard Unit: gramsPerSquareMeter
Precision: 0.01
Numeric Domain:
Number Type: real