Summary Information
Monsoon Rainfall Manipulation Experiment (MRME): Soil Nitrogen Data from the Sevilleta National Wildlife Refuge, New Mexico (2007 - 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
Publication Date: 2016-07-11
Language: English
Abstract:
The Monsoon Rainfall Manipulation Experiment (MRME) is designed to understand changes in ecosystem structure and function of a semiarid grassland caused by increased precipitation variability, by altering rainfall pulses, and thus soil moisture, that drive primary productivity, community composition, and ecosystem functioning. The overarching hypothesis being tested is that changes in event size and frequency will alter grassland productivity, ecosystem processes, and plant community dynamics. Treatments include (1) a monthly addition of 20 mm of rain in addition to ambient, and a weekly addition of 5 mm of rain in addition to ambient during the months of July, August and September. We predict that soil N availability with interact with rainfall event size to alter net primary productivity during the summer monsoon. Specifically, productivity will be higher on fertilized relative to control plots, and productivity will be highest on N addition plots in treatments with a small number of large events because these events infiltrate deeper and soil moisture is available longer following large compared to small events.
Keywords:
Keyword: inorganic nutrients
Keyword Thesaurus: Core Areas
Keywords:
Keyword: ecology
Keyword: events
Keyword: ammonium
Keyword: nitrate
Keyword: soil moisture
Keyword: soil
Keyword: deserts
Keyword: grasslands
Keyword Thesaurus: LTER Controlled Vocabulary
Additional Information:
Data was not collected in 2011. Additional Study Area Information Study Area Name: Monsoon site Study Area Location: Monsoon site is located just North of the grassland Drought plots Vegetation: dominated by black grama (Bouteloua eriopoda), and other highly prevalent grasses include Sporabolus contractus, S.cryptandrus, S. lexuosus, Muhlenbergia aernicola and Bouteloua gracilis. North Coordinate:34.20143 South Coordinate:34.20143 East Coordinate:-106.41489 West Coordinate:-106.41489
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/content/monsoon-rainfall-manipulation-experiment-mrme-soil-nitrogen-data-sevilleta-national-wildlife
Coverage:
Geographic Goverage:
Geographic Description: The Monsoon site is located within Five Points Black Grama, just to the north of the grassland drought plots. On August 4, 2009, a lightning-initiated fire began on the Sevilleta National Wildlife Refuge. The Monsoon site was entirely burned on this date, with all plots subjected to fire of comparable intensity.
Bounding Coordinates:
West Bounding Coordinates: -106.726
East Bounding Coordinates: -106.726
North Bounding Coordinates: 34.344
South Bounding Coordinates: 34.344
Bounding Altitude:
Altitude Minimum: 1615
Altitude Maximum: 1615
Altitude Units: meter
Temporal Coverage:
Date Range:
Begin Date:
Calendar Date: 2007-01-01
End Date:
Calendar Date: 2015-12-31
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
Publication Place: Sevilleta LTER
Method Step:
Description:
Experimental Design MRME contains three ambient precipitation plots and five replicates of the following treatments: 1) ambient plus a weekly addition of 5 mm rainfall, 2) ambient plus a monthly addition of 20 mm rainfall. Rainfall is added during the monsoon season (July-Sept) by an overhead (7 m) system fitted with sprinkler heads that deliver rainfall quality droplets. At the end of the summer, each treatment has received the same total amount of added precipitation, delivered in different sized events. Each plot (9x14 m) includes subplots (2x2 m) that receive 50 kg N ha-1 y-1. Each year we measure: (1) seasonal (July, August, September, and October) soil N, (2) plant species composition and ANPP, (3) annual belowground production in permanently located root ingrowth cores, and (4) soil temperature, moisture and CO2 fluxes (using in situ solid state CO2 sensors). Soil Measurements: We use plant root simulator probes (PRS® Probes, Western Ag Innovations, Saskatoon, Saskatchewan, Canada https://www.westernag.ca/innov). Instrumentation: Plant root simulator probes On August 4th, 2009, lightning ignited a ~3300 ha wildfire that burned through the entire experiment and its surroundings allowing us to assess experimentally the effects of interactions among rainfall pulse dynamics and wildfire on post-fire grassland dynamics and ecosystem processes.
Data Table:
Entity Name: sev309_MRMEsoilnitrogendata_20160727.csv
Entity Description: Data for sev309. Soil nitrogen data for the monsoon study.
Object Name: sev309_MRMEsoilnitrogendata_20160727.csv
Size: 5816
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/309/2/a18b90650c116cde2ea0fa940192c3a4
Attribute List:
Attribute Name: year
Attribute Label: year
Attribute Definition: The year in which the data were collected.
Storage Type: date
Measurement Scale:
Datetime:
Format String: YYYY
Attribute Name: number
Attribute Label: number
Attribute Definition: The designed number for specific probe.
Storage Type: string
Measurement Scale:
Nominal:
Non Numeric Domain:
Text Domain:
Definition: The designed number for specific probe.
Attribute Name: plot
Attribute Label: plot
Attribute Definition: The plot at which data was collected. Plots 1-13.
Storage Type: string
Measurement Scale:
Nominal:
Non Numeric Domain:
Enumerated Domain:
Code Definition:
Code: S
Definition: small, frequent rain treatment
Code Definition:
Code: L
Definition: large, infrequent rain treatment
Code Definition:
Code: C
Definition: ambient rainfall
Attribute Name: treatment
Attribute Label: treatment
Attribute Definition: Treatment of plots
Storage Type: string
Measurement Scale:
Nominal:
Non Numeric Domain:
Enumerated Domain:
Code Definition:
Code: C
Definition: control
Code Definition:
Code: F
Definition: fertilized subplots that receive 5gN/m2/yr added as NO3NH4 pellets in late June or early July each year
Attribute Name: NO3+NH4
Attribute Label: NO3+NH4
Attribute Definition: The concentration of NO3 and NH4 in micrograms of N per 10cm2.
Measurement Scale:
Ratio:
Unit:
Custom Unit: microgramsPer10cm2
Precision: 0.1
Numeric Domain:
Number Type: real
Attribute Name: NO3
Attribute Label: NO3
Attribute Definition: The concentration of NO3 in micrograms of N per 10cm2.
Measurement Scale:
Ratio:
Unit:
Custom Unit: microgramPer10cm2
Precision: 0.1
Numeric Domain:
Number Type: real
Attribute Name: NH4
Attribute Label: NH4
Attribute Definition: The concentration of NH4 in micrograms of N per 10cm2.
Measurement Scale:
Ratio:
Unit:
Custom Unit: microgramsPer10cm2
Precision: 0.1
Numeric Domain:
Number Type: real
Missing Value Code:
Code: "."
Code Explanation: missing