uid=SEV,o=LTER,dc=ecoinformatics,dc=org all public read Scott Collins SEV LTER

Department of Biology, MSC03 2020, 1 University of New Mexico Albuquerque NM 87131

scollins@sevilleta.unm.edu 12275 Kristin Vanderbilt SEV LTER

Department of Biology, MSC03 2020, 1 University of New Mexico Albuquerque NM 87131

(505) 277-2109 (505) 277.5355 vanderbi@sevilleta.unm.edu 11054 data manager Stephanie Baker SEV LTER (505) 277-8119 srbaker@sevilleta.unm.edu field crew Megan McClung SEV LTER

1 University of New Mexico, 167 Castetter Hall, MSC03 2020 Albuquerque NM 87131 United States

mmcclung@sevilleta.unm.edu field crew John Mulhouse SEV LTER

1 University of New Mexico, 167 Castetter Hall, MSC03 2020 Albuquerque NM 87131 United States of America

mulhouse@sevilleta.unm.edu 15417 field crew 2011 english

Begun in winter 2006, this long-term study at the Sevilleta LTER examines how heightened winter precipitation, N addition, and warmer nighttime temperatures affect 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 (SEV176, "Warming-El Nino-Nitrogen Deposition Experiment (WENNDEx): Net Primary Productivity (NPP) Study") and regressions correlating species biomass and volume constructed using seasonal harvest weights from SEV157, "Net Primary Productivity (NPP) Weight Data."

disturbance primary production Core Areas community patterns plant communities plant ecology vegetation dynamics successional dynamics plant species composition species richness fires wildfires plant cover net primary productivity annual net primary production plant biomass aboveground biomass precipitation population and community properties species composition soil moisture long term seasonality permanent plots plant growth nitrification succession aboveground production nitrogen deposition soil warming burning simulation fertilization harvesting ammonia fertilizer deserts grasslands plants foliage grasses herbs forbs shrubs vegetation LTER Controlled Vocabulary Other researchers involved with collecting samples/data: Megan McClung (MAM: 04/2013-present), Stephanie Baker (SRB; 09/2010-present), John Mulhouse (JMM; 08/2010-present), 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).

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. Datasets must be cited as in the example below. Muldavin, E. 2004. Sevilleta LTER Fertilizer NPP Study Dataset. Albuquerque, NM: Sevilleta Long Term Ecological Research Site Database: SEV155. (Date of download) A copy of any publications using these data must be supplied to the Sevilleta LTER Information Manager.

http://sev.lternet.edu/node/2641 Location: Five Points is the area which encompasses the Five Points Black Grama and Five Points Creosote Core study sites and falls along the transition between Chihuahuan Desert Scrub and Desert Grassland habitats. Both sites are subject to intensive research activity, including NPP measurement, phenology observation, pollinator diversity studies, and ground dwelling arthropod and rodent population assessments. There are drought rain-out shelters in both the Black Grama and Creosote sites, as well as the mixed-ecotone, with co-located ET Towers.Vegetation: The Five Points Creosote site is characterized as Chihuahuan Desert Scrub, dominated by a creosotebush overstory with broom snakeweed, purple pricklypear (O. macrocentra) and soapweed yucca as notable shrubs. The site is also characterized by numerous dense grass dominated patches, reflecting proximity to the Five Points Black Grama site and the relatively recent appearance of creosotebush. Dominant grasses are black grama, fluffgrass (Dasyochloa pulchellum), burrograss (Scleropogon brevifolia), bush muhly (M. porteri), and galleta (Pleuraphis jamesii). Notable forb species include field bahia (Bahia absinthifolia), baby aster (Chaetopappa ericoides), plains hiddenflower (Cryptantha crassisepala), Indian rushpea (Hoffmannseggia glauca), Fendlers bladderpod (Lesquerella fendleri), and globemallow (Sphaeralcea spp.). Five Points Black Grama habitat is ecotonal in nature, bordering Chihuahuan Desert Scrub at its southern extent and Plains-Mesa Grassland at its northern, more mesic boundary. There is also a significant presence of shrubs, particularly broom snakeweed (Gutierrezia sarothrae), along with less abundant fourwing saltbush (Atriplex canescens), Mormon tea (Ephedra torreyana), winterfat (Krascheninnikovia lanata), tree cholla (Opuntia imbricata), club cholla (O. clavata), desert pricklypear (O. phaeacantha), soapweed yucca (Yucca glauca), and what are presumed to be encroaching, yet sparsely distributed, creosotebush (Larrea tridentata). Characteristically, the dominant grass is black grama (Bouteloua eriopoda). Spike, sand, and mesa dropseed grasses (Sporobolus contractus, S. cryptandrus, S. flexuosus) and sand muhly (Muhlenbergia arenicola) could be considered co-dominant throughout, along with blue grama (B. gracilis) in a more mesic, shallow swale on the site. Notable forb species include trailing four o’clock (Allionia incarnata), horn loco milkvetch (Astragalus missouriensis), sawtooth spurge (Chamaesyce serrula), plains hiddenflower (Cryptantha crassisepala), blunt tansymustard (Descarania obtusa), wooly plaintain (Plantago patagonica), globemallow (Sphaeralcea wrightii), and mouse ear (Tidestromia lanuginosa)., siteid: 2 106.717 106.717 34.3381 34.3381 1615 1615 meter Location: The Warming site is located just to the northeast of the Deep Well meteorological station. The site can best be accessed by parking on the main road next to signs for Deep Well and the mini-rhizotron study. Note that vehicles are not permitted on the road to the Deep Well meteorological station.  Travel on foot towards Deep Well and look for a well-trod path to the northwest shortly before the meteorological station.  For plot maps, see power point slides in the on-line Sevilleta LTER WIKI page. On August 4, 2009, a lightning-initiated fire began on the Sevilleta National Wildlife Refuge. By August 5, 2009, the fire had reached the Warming site, which was burned extensively though not entirely. Approximately 50% of plots burned on August 5 and those plots which did not burn were burned within three weeks by US Fish and Wildlife.  Thus, the condition of all plots at the Warming site was comparable by early September 2009.Vegetation: The vegetation is Chihuahuan Desert Grassland, dominated by black grama (Bouteloua eriopoda) and blue grama (B. gracilis)., siteid: 28 -106.6908662 -106.6908662 34.35946709 34.35946709 2006-02-02 2010-10-13 02/06/09 (YX) Metadata created and compiled for 2006, 2007, 2008 data. From 2007, winter measurements are no longer taken. Sevilleta Information Manager SEV LTER data-use@sevilleta.unm.edu Sevilleta LTER

Derivation of Biomass and NPP: Data from SEV176 and SEV157 are 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 spring and 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.August 2009 Burn: On August 4, 2009, a lightning-initiated fire began on the Sevilleta National Wildlife Refuge. By August 5, 2009, the fire had reached the Warming site, which was burned extensively though not entirely. Approximately 50% of plots burned on August 5 and those plots which did not burn were burned within three weeks by US Fish and Wildlife.  Thus, the condition of all plots at the Warming site was comparable by early September 2009.

sev205_warmingbiomass_04092012txt.txt Seasonal biomass and seasonal and annual NPP for the warming study. sev205_warmingbiomass_04092012txt.txt column , http://sev.lternet.edu/sites/default/files/data/sev-205/sev205_warmingbiomass_04092012txt.txt 2006-02-02 2011-10-13 year year The year in which data was collected. date YYYY treatment treatment The experimental regime applied to a project. string C Control plot. N Nitrogen manipulated. P Precipitation manipulated. PN Precipitation and nitrogen manipulated. T Temperature manipulated. TN Temperature and nitrogen manipulated. TP Temperature and precipitation manipulated. TPN Temperature, precipitation, and nitrogen manipulated. plot plot The plot at which data was collected. string The plot at which data was collected. quad quad The quadrat at which data was collected. string The quadrat at which data was collected. species species The Kartez code for a plant species as designated by the USDA Plants Database. string The Kartez code for a plant species as designated by the USDA Plants Database. wwt wwt The calculated weight of live green biomass for a species in a quadrat in the winter. gramsPerSquareMeter 0.01 real swt swt The calculated weight of live green biomass for a species in a quadrat in the spring. gramsPerSquareMeter 0.01 real fwt fwt The calculated weight of live green biomass for a species in a quadrat in the fall. gramsPerSquareMeter 0.01 real snpp snpp The calculated primary production of a species in a quadrat in the spring. gramsPerSquareMeter 0.01 real fnpp fnpp The calculated primary production of a species in a quadrat in the fall. gramsPerSquareMeter 0.01 real anpp anpp The calculated annual primary production of a species in a quadrat. gramsPerSquareMeter 0.01 real