| 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.
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| Keywords: |
| Keyword: |
inorganic nutrients |
| Keyword Thesaurus: |
Core Areas |
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| 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
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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://sev.lternet.edu/content/monsoon-rainfall-manipulation-experiment-mrme-soil-nitrogen-data-sevilleta-national-wildlife |
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|
| 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 |
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|
| Temporal Coverage: |
| Date Range: |
| Begin Date: |
| Calendar Date: |
2007-01-01 |
|
| End Date: |
| Calendar Date: |
2015-12-31 |
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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 |
|
| 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.
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| 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: |
, |
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| Distribution: |
| Online: |
| URL: |
https://pasta.lternet.edu/package/data/eml/knb-lter-sev/309/2/a18b90650c116cde2ea0fa940192c3a4 |
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| 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 |
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|
| 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. |
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|
| 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 |
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| Code Definition: |
| Code: |
L |
| Definition: |
large, infrequent rain treatment |
|
| Code Definition: |
| Code: |
C |
| Definition: |
ambient rainfall |
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| 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
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| 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 |
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| 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 |
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|
| 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 |
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| Missing Value Code: |
| Code: |
"." |
| Code Explanation: |
missing |
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