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Nitrogen Fertilization Experiment (Nfert): Seasonal Biomass And Seasonal And Annual Npp Data At The Sevilleta National Wildlife Refuge, New Mexico (2004- Present), Scott Collins
Sevilleta LTER Program Data
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 …
Core Research Site Web Seasonal Biomass And Seasonal And Annual Npp Data For The Net Primary Production Study At The Sevilleta National Wildlife Refuge, New Mexico (1999-Present), Esteban Muldavin, Douglas I. Moore
Core Research Site Web Seasonal Biomass And Seasonal And Annual Npp Data For The Net Primary Production Study At The Sevilleta National Wildlife Refuge, New Mexico (1999-Present), Esteban Muldavin, Douglas I. Moore
Sevilleta LTER Program Data
This long-term study at the Sevilleta LTER measures net primary production (NPP) across four distinct ecosystems: creosote-dominant shrubland (Site C, est. winter 1999), black grama-dominant grassland (Site G, est. winter 1999), blue grama-dominant grassland (Site B, est. winter 2002), and pinon-juniper woodland (Site P, est. winter 2003), which is now in its own dataset, SEV278 (Pinon-Juniper (Core Site) Quadrat Data). 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 …
Small Mammal Exclosure Study (Smes) Ant Data From Chihuahuan Desert Grassland And Shrubland At The Sevilleta National Wildlife Refuge, New Mexico (1995-2005), David Lightfoot
Sevilleta LTER Program Data
Animal consumers have important roles in ecosystems, determining plant species composition and structure, regulating rates of plant production and nutrients, and altering soil structure and chemistry. This is data for numbers and species of seed harvester ant nests mapped from each of the SMES study plots. Seed harvester ant nests were mapped on each of the study plots once each year in the autumn. Ant nest maps were drawn on to pre-designed plot diagrams. Each nest was located on the diagram in reference to one of the 36 vegetation quadrat marker posts. The distance from the post, direction from the …
Small Mammal Exclosure Study (Smes) Cryptogamic Crust Data From Chihuahuan Desert Grassland And Shrubland At The Sevilleta National Wildlife Refuge, New Mexico (1995-2005), David Lightfoot
Sevilleta LTER Program Data
The purpose of this study is to determine whether or not the activities of small mammals regulate plant community structure, plant species diversity, and spatial vegetation patterns in Chihuahuan Desert shrublands and grasslands. What role if any do indigenous small mammal consumers have in maintaining desertified landscapes in the Chihuahuan Desert? Additionally, how do the effects of small mammals interact with changing climate to affect vegetation patterns over time? This is data for soil surface cover of cryptobiotic (cryptogam) crusts measured on each of the SMES study plots. Cryptobiotic crusts were measured from each of the 36 one-meter2 quadrats twice …
Multi-Temporal Tm-Ndvi Vectors At Rodent Webs From The Sevilleta National Wildlife Refuge, New Mexico (1984-1993), Robert Parmenter, Charly Irland, James Cheeck, Greg Shore
Multi-Temporal Tm-Ndvi Vectors At Rodent Webs From The Sevilleta National Wildlife Refuge, New Mexico (1984-1993), Robert Parmenter, Charly Irland, James Cheeck, Greg Shore
Sevilleta LTER Program Data
This database contains mean NDVI values for 200 m diameter circles encompassing Rodent Webs on the Sevilleta National Wildlife Refuge (NWR), for 21 Landsat TM scene dating from 1984 to 1993. These NDVI vectors were generated as part of cooperative project between the Sevilleta LTER and the Indian Health Service, to study the 1992 Hantavirus outbreak.
Small Mammal Exclosure Study (Smes) Leaf Litter Study In The Chihuahuan Desert Grassland And Shrubland At The Sevilleta National Wildlife Refuge, New Mexico, David Lightfoot
Sevilleta LTER Program Data
The purpose of this study is to determine whether or not the activities of small mammals regulate plant community structure, plant species diversity, and spatial vegetation patterns in Chihuahuan Desert shrublands and grasslands. What role if any do indigenous small mammal consumers have in maintaining desertified landscapes in the Chihuahuan Desert? Additionally, how do the effects of small mammals interact with changing climate to affect vegetation patterns over time? This is data for cover of dead plant leaf litter accumulations on soil surfaces measured on each of the SMES study plots. Leaf litter cover was measured from each of the …
Long-Term Intersite Decomposition Team (Lidet) Plant Litter Data At The Sevilleta National Wildlife Refuge, New Mexico (1990-2001), Carleton White
Long-Term Intersite Decomposition Team (Lidet) Plant Litter Data At The Sevilleta National Wildlife Refuge, New Mexico (1990-2001), Carleton White
Sevilleta LTER Program Data
Sevilleta data from a study testing the degree to which substrate quality and macroclimate control the carbon and nitrogen dynamics of decomposing leaf, wood, and fine-root litter in a 10-year, 28 site (17 LTER) team experiment. http://andrewsforest.oregonstate.edu/data/abstract.cfm?dbcode=TD023&topnav=97
The Effect Of Kangaroo-Rat Activity On Plant Species Composition At The Sevilleta National Wildlife Refuge, New Mexico (1999), Gyuri Kroel-Dulay, Debra Peters, Tamara Hochstrasser
The Effect Of Kangaroo-Rat Activity On Plant Species Composition At The Sevilleta National Wildlife Refuge, New Mexico (1999), Gyuri Kroel-Dulay, Debra Peters, Tamara Hochstrasser
Sevilleta LTER Program Data
Our objective was to evaluate the effects of kangaroo rat mounds on species diversity and composition at a semiarid-arid grassland ecotone. We expected that source populations of plants occurring on kangaroo rat mounds have important influences on the species composition of vegetation at the landscape scale, and that these influences differ by grassland type. Our study was conducted at the Sevilleta LTER in New Mexico, where a grassland type dominated by Bouteloua gracilis, a shortgrass steppe species, and a grassland type dominated by B. eriopoda, a desert grassland species, meet to form patches across the landscape. Four 0.4 ha plots …
Plant Litter Decomposition At The Sevilleta National Wildlife Refuge, New Mexico (1990-1998), Jim Gosz
Plant Litter Decomposition At The Sevilleta National Wildlife Refuge, New Mexico (1990-1998), Jim Gosz
Sevilleta LTER Program Data
The long-term goal of the decomposition study was to document the effects of climate variation on decomposition of major plant litter-types. The project began in 1989 and underwent changes of locations and litter types. The long-term litter types included black grama, Indian rice grass, juniper, and creosote. Â Mass loss of the litter types can be compared to precipitation and other meteorological factors obtained at nearby locations.
Discontinued Vegetation Line-Intercept Transects In Transition Zones At The Sevilleta National Wildlife Refuge, New Mexico (1989-1998), Scott Collins
Discontinued Vegetation Line-Intercept Transects In Transition Zones At The Sevilleta National Wildlife Refuge, New Mexico (1989-1998), Scott Collins
Sevilleta LTER Program Data
The line-intercept transects included in this data set have been discontinued. These transects were installed to evaluate temporal and spatial dynamics in vegetation transition zones (e.g.black grama grassland/creosote shrubland) at one centimeter resolution. Each study site originally contained four 400 m transects, representing total coverage of 1 sq km. The transects were placed along a roughly north/south azimuth. The northwestern and southwestern transects were 100 meters from the western edge of the 1 sq km study area and the northeastern and southeastern transects were 100 m from the eastern edge, providing 800 meters between the eastern and western transects. The …
Below-Ground Net Primary Production (Bnpp): Root Ingrowth Donuts In Chihuahuan Desert Grassland And Creosote Shrubland At The Sevilleta National Wildlife Refuge, New Mexico (2005-Present), Scott Collins
Sevilleta LTER Program Data
In 2005, annually harvested root ingrowth donut structures were co-located with previously established mini-rhizotron tubes established at four sites on McKenzie Flats located on the east side of Sevilleta NWR: 10 replicate structures in both burned and unburned blue and black grama dominated grassland plots at Deep Well, 10 replicates each on nitrogen fertilization plots and respective control plots on McKenzie Flats(20 total), 10 replicates in creosote dominated shrubland at the Five Points Creosote Core site and in 2011, 13 structures were put in the Monsoon site. Roots and soil are harvested annually in late fall after the growing season, …
Net Primary Productivity (Npp) Weight Data At The Sevilleta National Wildlife Refuge, New Mexico (1999 - Present), Douglas I. Moore
Net Primary Productivity (Npp) Weight Data At The Sevilleta National Wildlife Refuge, New Mexico (1999 - Present), Douglas I. Moore
Sevilleta LTER Program Data
Several long-term studies at the Sevilleta LTER measure net primary production (NPP) across ecosystems and treatments. 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. Above-ground net primary production (ANPP) is the change in plant biomass, including loss to death and decomposition, over a given period of time. To measure this change, vegetation variables, including species composition and the cover and height of individuals, are sampled up …
Livestock Exclosure Nutrient Study From A Chihuahuan Desert Grassland At The Sevilleta National Wildlife Refuge, New Mexico (2003), Lydia Zeglin
Sevilleta LTER Program Data
Data on soil characteristics and dominant grass and soil chemical composition gathered on active rangeland, livestock exclosures on active rangeland, and the Sevilleta NWR.
2003 Prescribed Burn Effect On Chihuahuan Desert Grasses And Shrubs At The Sevilleta National Wildlife Refuge, New Mexico: Grass Recovery Study (2003-2012), Esteban Muldavin
2003 Prescribed Burn Effect On Chihuahuan Desert Grasses And Shrubs At The Sevilleta National Wildlife Refuge, New Mexico: Grass Recovery Study (2003-2012), Esteban Muldavin
Sevilleta LTER Program Data
The U.S. Fish and Wildlife's plan to apply a prescribed burn to a large portion of Mckenzie Flats was deemed an opportunity to study the effects of fire on vegetation at the boundary between shrubland and grassland. This study actually was undertaken on an area that had prescribed fire applied to 8 of 16 (300 m x 300 m) plots 10 years before in 1993. This previous study had also examined the effects of fencing to exclude the indigenous prong-horn antelope. In the 2003 study the prescribed fire was applied to the northeastern half of the 16 plots while the …
Ecological Effects Of Prescribed Fire On Soils In A Chihuahuan Desert Grassland At The Sevilleta National Wildlife Refuge, New Mexico (2003), Lydia Zeglin
Sevilleta LTER Program Data
Fire resulting from natural ignition has become a more common event on the Sevilleta National Wildlife Refuge (NWR) since the exclusion of domesticated livestock. Efforts to return fire to the native landscape has resulted in the use of prescribed fire during periods that meet burn prescriptions. A prescribed fire was performed on the Sevilleta NWR in June 2003. Among the measured site and burn characteristics that were measure, this project sampled soils before and after the fire from 5 previously-sampled locations that were burned in June 2003 and from 5 newly established locations that served as controls. The controls were …
Warming-El Nino-Nitrogen Deposition Experiment (Wenndex): Net Primary Production Quadrat Data At The Sevilleta National Wildlife Refuge, New Mexico (2006 -Present), Scott Collins, William Pockman, Joe Fargione
Warming-El Nino-Nitrogen Deposition Experiment (Wenndex): Net Primary Production Quadrat Data At The Sevilleta National Wildlife Refuge, New Mexico (2006 -Present), Scott Collins, William Pockman, Joe Fargione
Sevilleta LTER Program Data
Humans are creating significant global environmental change, including shifts in climate, increased nitrogen (N) deposition, and the facilitation of species invasions. A multi-factorial field experiment is being performed in an arid grassland within the Sevilleta National Wildlife Refuge (NWR) to simulate increased nighttime temperature, higher N deposition, and heightened El Niño frequency (which increases winter precipitation by an average of 50%). The purpose of the experiment is to better understand the potential effects of environmental change on grassland community composition and the growth of introduced creosote seeds and seedlings. The focus is on the response of three dominant species, all …
Grassland Vegetation Line-Intercept Transects At The Sevilleta National Wildlife Refuge, New Mexico (1989 - Present), Scott Collins
Grassland Vegetation Line-Intercept Transects At The Sevilleta National Wildlife Refuge, New Mexico (1989 - Present), Scott Collins
Sevilleta LTER Program Data
In 1989, line-intercept transects were installed to evaluate temporal and spatial dynamics across vegetation transition zones. Currently, a 400m transect is sampled at a grassland site (Deep Well) which is dominated by Bouteloua eriopoda (black grama) and, near the southern end of the transect, B. gracilis (blue grama). A second grassland site (Five Points), dominated by B. eriopoda and, to the south, Larrea tridentata (creosote), is also sampled. Both sites are sampled twice a year, in May/June and September/October, and measurements are taken at a one-centimeter resolution. The biannual sampling protocol detects potential responses in both cool and warm season …
Effects Of Multiple Resource Additions On Community And Ecosystem Processes: Nutnet Npp Quadrat Sampling At The Sevilleta National Wildlife Refuge, New Mexico (2007-Present), Scott Collins
Sevilleta LTER Program Data
Two of the most pervasive human impacts on ecosystems are alteration of global nutrient budgets and changes in the abundance and identity of consumers. Fossil fuel combustion and agricultural fertilization have doubled and quintupled, respectively, global pools of nitrogen and phosphorus relative to pre-industrial levels. In spite of the global impacts of these human activities, there have been no globally coordinated experiments to quantify the general impacts on ecological systems. This experiment seeks to determine how nutrient availability controls plant biomass, diversity, and species composition in a desert grassland. This has important implications for understanding how future atmospheric deposition of …
Mega-Monsoon Experiment (Megame) Vegetation Sampling Data From The Sevilleta National Wildlife Refuge, New Mexico (2014 - Present), Scott Collins
Mega-Monsoon Experiment (Megame) Vegetation Sampling Data From The Sevilleta National Wildlife Refuge, New Mexico (2014 - Present), Scott Collins
Sevilleta LTER Program Data
Shrub encroachment is a global phenomenon. Both the causes and consequences of shrub encroachment vary regionally and globally. In the southwestern US a common native C3 shrub species, creosotebush, has invaded millions of hectares of arid and semi-arid C4-dominated grassland. At the Sevilleta LTER site, it appears that the grassland-shrubland ecotone is relatively stable, but infill by creosotebush continues to occur. The consequences of shrub encroachment have been and continue to be carefully documented, but the ecological drivers of shrub encroachment in the southwestern US are not well known.One key factor that may promote shrub encroachment is grazing by domestic …
Burn Study Sites Quadrat Data For The Net Primary Production Study At The Sevilleta National Wildlife Refuge, New Mexico (2004-Present), Esteban Muldavin
Burn Study Sites Quadrat Data For The Net Primary Production Study At The Sevilleta National Wildlife Refuge, New Mexico (2004-Present), Esteban Muldavin
Sevilleta LTER Program Data
In 2003, the U.S. Fish and Wildlife Service conducted a prescribed burn over a large part of the northeastern corner of the Sevilleta National Wildlife Refuge. Following this burn, a study was designed to look at the effect of fire on above-ground net primary productivity (ANPP) (i.e., the change in plant biomass, represented by stems, flowers, fruit and foliage, over time) within three different vegetation types: mixed grass (MG), mixed shrub (MS) and black grama (G). Forty permanent 1m x 1m plots were installed in both burned and unburned (i.e., control) sections of each habitat type. The core black grama …
Point-Quarter Harvested Plant Weight Measurements To Estimate Shrub Anpp In A Chihuahuan Desert Creosote Shrubland At The Sevilleta National Wildlife Refuge, New Mexico (2007- Present), Esteban Muldavin, Douglas I. Moore
Point-Quarter Harvested Plant Weight Measurements To Estimate Shrub Anpp In A Chihuahuan Desert Creosote Shrubland At The Sevilleta National Wildlife Refuge, New Mexico (2007- Present), Esteban Muldavin, Douglas I. Moore
Sevilleta LTER Program Data
In an effort to better quantify NPP of Creosotebush in the Five-Points region, it was decided to test the Point-Quarter method against the standard 1-m2 quadrat method that has been in use since 1998. Transects were laid out across the 5 mammal trapping webs as well as across burned and unburned plots of the Mixed Shrub site (MS). Repeat measures of the same bushes are performed seasonally. Whole shrubs of various size classes are collected and sorted and weighed to develop regressions for biomass.
Pinon-Juniper (Core Site) Quadrat Data For The Net Primary Production Study At The Sevilleta National Wildlife Refuge, New Mexico (2003-Present ), Esteban Muldavin
Pinon-Juniper (Core Site) Quadrat Data For The Net Primary Production Study At The Sevilleta National Wildlife Refuge, New Mexico (2003-Present ), Esteban Muldavin
Sevilleta LTER Program Data
This dataset contains pinon-juniper woodland quadrat data and is part of a long-term study at the Sevilleta LTER measuring net primary production (NPP) across four distinct ecosystems: creosote-dominant shrubland (Site C, est. winter 1999), black grama-dominant grassland (Site G, est. winter 1999), blue grama-dominant grassland (Site B, est. winter 2002), and pinon-juniper woodland (Site P, est. winter 2003). 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. …
Core Site Grid Quadrat Data For The Net Primary Production Study At The Sevilleta National Wildlife Refuge, New Mexico (2013- Present), Esteban Muldavin
Core Site Grid Quadrat Data For The Net Primary Production Study At The Sevilleta National Wildlife Refuge, New Mexico (2013- Present), Esteban Muldavin
Sevilleta LTER Program Data
Begun in spring 2013, this project is part of a long-term study at the Sevilleta LTER measuring net primary production (NPP) across three distinct ecosystems: creosote-dominant shrubland (Site C), black grama-dominant grassland (Site G), and blue grama-dominant grassland (Site B). 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.Above-ground net primary production is the change in plant biomass, represented by stems, flowers, fruit and and foliage, over …
Biome Transition Along Elevational Gradients In New Mexico (Seon) Study: Flux Tower Net Primary Productivity (Npp) Quadrat Study At The Sevilleta National Wildlife Refuge, New Mexico (2011- Present), Marcy Litvak
Sevilleta LTER Program Data
The varied topography and large elevation gradients that characterize the arid and semi-arid Southwest create a wide range of climatic conditions - and associated biomes - within relatively short distances. This creates an ideal experimental system in which to study the effects of climate on ecosystems. Such studies are critical givien that the Southwestern U.S. has already experienced changes in climate that have altered precipitation patterns (Mote et al. 2005), and stands to experience dramatic climate change in the coming decades (Seager et al. 2007; Ting et al. 2007). Climate models currently predict an imminent transition to a warmer, more …
Sevilleta Lter Vegetation Sample Catalog- Ground Samples For Chemical Analysis (2000-Present), Douglas I. Moore, Stephanie Baker
Sevilleta Lter Vegetation Sample Catalog- Ground Samples For Chemical Analysis (2000-Present), Douglas I. Moore, Stephanie Baker
Sevilleta LTER Program Data
Several long-term studies at the Sevilleta LTER measure net primary production (NPP) across ecosystems and treatments. 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. The NPP weight data (SEV 157) is obtained by harvesting a series of covers for species observed during plot sampling. These species are always harvested from habitat comparable to the plots in which they were recorded. This data is then used to …
Ukulinga Farms, South Africa: Species List, Alan Knapp, Melinda Smith, John Blair, Scott Collins, Deron Burkepile, Kevin Kirkman
Ukulinga Farms, South Africa: Species List, Alan Knapp, Melinda Smith, John Blair, Scott Collins, Deron Burkepile, Kevin Kirkman
Sevilleta LTER Program Data
The distribution, structure and function of mesic savanna grasslands are strongly driven by fire regimes, grazing by large herbivores, and their interactions. This research addresses a general question about our understanding of savanna grasslands globally: Is our knowledge of fire and grazing sufficiently general to enable us to make accurate predictions of how these ecosystems will respond to changes in these drivers over time? Some evidence suggests that fire and grazing influence savanna grassland structure and function differently in South Africa (SA) compared to North America (NA). These differences have been attributed to the contingent factors of greater biome age, …
Konza Prairie, Kansas Plant Species List, Alan Knapp, Melinda Smith, John Blair, Scott Collins, Deron Burkepile, Kevin Kirkman
Konza Prairie, Kansas Plant Species List, Alan Knapp, Melinda Smith, John Blair, Scott Collins, Deron Burkepile, Kevin Kirkman
Sevilleta LTER Program Data
The distribution, structure and function of mesic savanna grasslands are strongly driven by fire regimes, grazing by large herbivores, and their interactions. This research addresses a general question about our understanding of savanna grasslands globally: Is our knowledge of fire and grazing sufficiently general to enable us to make accurate predictions of how these ecosystems will respond to changes in these drivers over time? Some evidence suggests that fire and grazing influence savanna grassland structure and function differently in South Africa (SA) compared to North America (NA). These differences have been attributed to the contingent factors of greater biome age, …
Kruger Species Composition: Konza-Kruger Fire-Grazing Project (2006-2010), Alan Knapp, Melinda Smith, John Blair, Scott Collins, Deron Burkepile, Kevin Kirkman
Kruger Species Composition: Konza-Kruger Fire-Grazing Project (2006-2010), Alan Knapp, Melinda Smith, John Blair, Scott Collins, Deron Burkepile, Kevin Kirkman
Sevilleta LTER Program Data
The distribution, structure and function of mesic savanna grasslands are strongly driven by fire regimes, grazing by large herbivores, and their interactions. This research addresses a general question about our understanding of savanna grasslands globally: Is our knowledge of fire and grazing sufficiently general to enable us to make accurate predictions of how these ecosystems will respond to changes in these drivers over time? Some evidence suggests that fire and grazing influence savanna grassland structure and function differently in South Africa (SA) compared to North America (NA). These differences have been attributed to the contingent factors of greater biome age, …
Warming-El Nino-Nitrogen Deposition Experiment (Wenndex): Meteorology Data (4/30/2007 - 8/5/2009), Scott Collins
Warming-El Nino-Nitrogen Deposition Experiment (Wenndex): Meteorology Data (4/30/2007 - 8/5/2009), Scott Collins
Sevilleta LTER Program Data
Humans are creating significant global environmental change, including shifts in climate, increased nitrogen (N) deposition, and the facilitation of species invasions. A multi-factorial field experiment is being performed in an arid grassland within the Sevilleta National Wildlife Refuge (NWR) to simulate increased nighttime temperature, higher N deposition, and heightened El Niño frequency (which increases winter precipitation by an average of 50%). The purpose of the experiment is to better understand the potential effects of environmental change on grassland community composition and the growth of introduced creosote seeds and seedlings. The focus is on the response of three dominant species, all …
Master Plant Species Information Database For The Sevilleta National Wildlife Refuge, New Mexico (1989-1996), Tim Lowrey
Master Plant Species Information Database For The Sevilleta National Wildlife Refuge, New Mexico (1989-1996), Tim Lowrey
Sevilleta LTER Program Data
This data base contains taxonomic and ecological information for the plant species on the Sevilleta National Wildlife Refuge.