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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 …
Monsoon Rainfall Manipulation Experiment (Mrme): Net Primary Production Quadrat Data At The Sevilleta National Wildlife Refuge, New Mexico (2006-Present), Scott Collins
Sevilleta LTER Program Data
The Monsoon Rainfall Manipulation Experiment (MRME) is to understand changes in ecosystem structure and function of a semiarid grassland caused by increased precipitation variability, which alters the pulses of soil moisture that drive primary productivity, community composition, and ecosystem functioning. The overarching hypothesis being tested is that changes in event size and variability will alter grassland productivity, ecosystem processes, and plant community dynamics. In particular, we predict that many small events will increase soil CO2 effluxes by stimulating microbial processes but not plant growth, whereas a small number of large events will increase aboveground net primary production (ANPP) and soil …
Pinon Branch Demography Study At The Sevilleta National Wildlife Refuge, New Mexico (1989-1993), Diane Marshall
Pinon Branch Demography Study At The Sevilleta National Wildlife Refuge, New Mexico (1989-1993), Diane Marshall
Sevilleta LTER Program Data
This project was designed to investigate the response of plant growth and reproduction to short- and long-term variation in biotic and abiotic environmental variables. Several perennial taxa, including tree (Juniperus monsperma and Pinus edulis), shrub (Larrea tridentata) and bunch grasses (Oryzopsis hymenoides (now Achnaterum hymenoides) and Sporobolus contractus) species, were monitored at 1-3 sites differing in elevation and topography as well as edaphic variables and annual precipitation. The sites represented optimal or marginal/transitional zones for particular species. Demographic measurements were made biannually, after the 'wet' (fall) and 'dry' (spring) seasons. For tree and shrub species, estimates of growth and reproduction …
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 …
Nitrogen Fertilization Experiment (Nfert): Net Primary Production Quadrat Data At The Sevilleta National Wildlife Refuge, New Mexico (2004-Present), Scott Collins
Sevilleta LTER Program Data
This dataset is part of a long-term study at the Sevilleta LTER, begun in spring 2004, which 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. Above-ground net primary production is the change in plant biomass, represented by stems, flowers, fruit and foliage, over time and incorporates growth as well as loss to death and …
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 …
Coyote Scat Surveys In Chihuahuan Desert Grassland And Shrubland Sites, Spring, Summer And Fall At The Sevilleta National Wildlife Refuge, New Mexico (2008-2009), Virginia Seamster
Coyote Scat Surveys In Chihuahuan Desert Grassland And Shrubland Sites, Spring, Summer And Fall At The Sevilleta National Wildlife Refuge, New Mexico (2008-2009), Virginia Seamster
Sevilleta LTER Program Data
This data set contains information regarding carnivore scat surveys that were performed at sites in grama grassland and both creosote and mesquite shrubland habitats at the Sevilleta NWR. A total of nine surveys were carried out along road-based transects, each of which is a mile long, during one season in 2008 (June-July) and three seasons in 2009: spring (April-May), summer (July-August), and fall (October-November). There were 10 transects in grassland areas and 10 in shrubland areas in 2008. All 20 transects, as well as two additional transects in grassland areas, were surveyed in 2009. For more information on the structure …
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 …
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 …
Biome Transition Along Elevational Gradients In New Mexico (Seon) Study: Flux Tower Seasonal Biomass And Seasonal And Annual Npp Data At The Sevilleta National Wildlife Refuge, New Mexico, Marcy Litvak
Sevilleta LTER Program Data
No abstract provided.
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 …
Effects Of Multiple Resource Additions On Community And Ecosystem Processes: Nutnet Seasonal Biomass And Seasonal And Annual Npp Data At The Sevilleta National Wildlife Refuge, New Mexico, 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 …
Pinon-Juniper (Core Site) Seasonal Biomass And Seasonal And Annual Npp Data For The Net Primary Production Study At The Sevilleta National Wildlife Refuge, New Mexico, Esteban Muldavin
Sevilleta LTER Program Data
This dataset contains pinon-juniper woodland biomass 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.Above-ground …
Coyote Scat Survey In The Chihuahuan Desert Grasslands And Creosote Shrublands At The Sevilleta National Wildlife Refuge, New Mexico (1992-2004), Robert Parmenter
Coyote Scat Survey In The Chihuahuan Desert Grasslands And Creosote Shrublands At The Sevilleta National Wildlife Refuge, New Mexico (1992-2004), Robert Parmenter
Sevilleta LTER Program Data
This study measured the population dynamics of coyotes in the grasslands and creosote shrublands of McKenzie Flats, Sevilleta National Wildlife Refuge. The study was begun in January, 1992, and continued quarterly each year. Â Coyotes were sampled via scat counts along the roads of McKenzie Flats during winter, spring, summer, and fall of each year. The entire road transect was 21.5 miles in length. Scat counts over a week period (number of scats/mile/day) in each season along the roads were used to calculate the densities of coyotes (number of coyotes per square kilometer). Results from 1992 to 2002 indicated that …
Biannnual Creosote Branch Demography Study At The Sevilleta National Wildlife Refuge, New Mexico (1989-1993), Diane Marshall
Biannnual Creosote Branch Demography Study At The Sevilleta National Wildlife Refuge, New Mexico (1989-1993), Diane Marshall
Sevilleta LTER Program Data
No abstract provided.
Biannual Grass Demography Study At The Sevilleta National Wildlife Refuge, New Mexico (1989-1993), Douglas I. Moore
Biannual Grass Demography Study At The Sevilleta National Wildlife Refuge, New Mexico (1989-1993), Douglas I. Moore
Sevilleta LTER Program Data
No abstract provided.
Core Research Site Web Quadrat Data For The Net Primary Production Study At The Sevilleta National Wildlife Refuge, New Mexico (1999-Present), Esteban Muldavin
Core Research Site Web Quadrat Data For The Net Primary Production Study At The Sevilleta National Wildlife Refuge, New Mexico (1999-Present), Esteban Muldavin
Sevilleta LTER Program Data
This dataset 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. Above-ground net primary production is the …
Monsoon Rainfall Manipulation Experiment (Mrme): Seasonal Biomass And Seasonal And Annual Npp Data At The Sevilleta National Wildlife Refuge, New Mexico (2006-Present), Scott Collins
Sevilleta LTER Program Data
Begun in fall 2006, this long-term study at the Sevilleta LTER examines changes in net primary production (NPP) caused by increased precipitation variability within a semiarid 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 …
Point-Quarter Distance And Dimension Measurements To Calculate Shrub Density And Estimate Shrub Anpp In A Chihuahuan Desert Creosote Shrubland At The Sevilleta National Wildlife Refuge, New Mexico (2007- Present), Douglas I. Moore, Scott Collins
Point-Quarter Distance And Dimension Measurements To Calculate Shrub Density And Estimate Shrub Anpp In A Chihuahuan Desert Creosote Shrubland At The Sevilleta National Wildlife Refuge, New Mexico (2007- Present), Douglas I. Moore, Scott Collins
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). Repeated measures of the same bushes are performed seasonally. Whole shrubs of various size classes are collected, sorted, and weighed to develop regressions for biomass.
Effects Of Fire Seasonality On Chihuahuan Desert Grasslands At The Sevilleta National Wildlife Refuge, New Mexico (2007-2015), Laura Ladwig, Scott Collins, Paulette Ford
Effects Of Fire Seasonality On Chihuahuan Desert Grasslands At The Sevilleta National Wildlife Refuge, New Mexico (2007-2015), Laura Ladwig, Scott Collins, Paulette Ford
Sevilleta LTER Program Data
Native vegetation is the key resource upon which rangelands are built, and restoring rangeland ecosystems are one of the most critical challenges facing rangeland managers today. This experimental fire research project, in collaboration with the USFWS and the Sevilleta LTER, is intended to provide FWS and other land managers of southwestern grasslands and rangelands with information about vegetation recovery following fire under different seasonal conditions and burning treatments. This experimental research will enable the FWS to more effectively set project objectives for prescribed burning on the Sevilleta NWR to benefit not only wildlife habitat, but to better align the timing …
Vegetation Surveys In Chihuahuan Desert Grassland And Shrubland Sites Associated With Coyote Scat Surveys At The Sevilleta National Wildlife Refuge, New Mexico (2008-2009), Virginia Seamster
Vegetation Surveys In Chihuahuan Desert Grassland And Shrubland Sites Associated With Coyote Scat Surveys At The Sevilleta National Wildlife Refuge, New Mexico (2008-2009), Virginia Seamster
Sevilleta LTER Program Data
This data set contains information regarding vegetation structure at sites in grama grassland and both creosote and mesquite shrubland habitats at the Sevilleta NWR. This information was collected at randomly selected sites throughout the refuge. Each site is within 100 meters of one of the 22 road-based transects(20 in 2008) that were used to carry out coyote scat surveys during three seasons (spring, summer and fall) in 2009 (see "Coyote scat surveys in grassland and shrubland sites at the Sevilleta NWR, spring, summer and fall 2009" data set). Data was collected within at total of 22 circular vegetation plots (40 …
Pinon Juniper Net Primary Production Quadrat Data From The Sevilleta National Wildlife Refuge, New Mexico: 1999-2001, Esteban Muldavin
Pinon Juniper Net Primary Production Quadrat Data From The Sevilleta National Wildlife Refuge, New Mexico: 1999-2001, Esteban Muldavin
Sevilleta LTER Program Data
This three-year study at the Sevilleta LTER was designed to monitor net primary production (NPP) across two distinct ecosystems: pinon/juniper woodland (P) and juniper savannah woodland (J). Net primary production (NPP) is a fundamental ecological variable that measures 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 of the community to a wide range of ecological processes. While measures of both below- and above-ground biomass are important in estimating NPP, this study focused on estimating above-ground biomass production (ANPP).To measure ANPP (i.e., the …
Biannual Juniper Branch Demography Study At The Sevilleta National Wildlife Refuge, New Mexico (1989-1993), Diane Marshall
Biannual Juniper Branch Demography Study At The Sevilleta National Wildlife Refuge, New Mexico (1989-1993), Diane Marshall
Sevilleta LTER Program Data
No abstract provided.
Deep Well Burn Line-Intercept Vegetation Transects At The Sevilleta National Wildlife Refuge, New Mexico (1995-2009), Douglas I. Moore
Deep Well Burn Line-Intercept Vegetation Transects At The Sevilleta National Wildlife Refuge, New Mexico (1995-2009), Douglas I. Moore
Sevilleta LTER Program Data
A natural burn occurred in the Deep Well area of McKenzie Flats in June, 1995, following which studies were initiated to evaluate the effect of fire on plant species composition and the spatial and temporal dynamics of regrowth. The burn area was approximately 24 hectares, forming a swath about 200 m wide from the initial lightning-ignition source. The fire moved in a westward direction from the ignition point, leaving a relatively straight border along the southern boundary and an irregular edge along the northern boundary. The fire was extinguished naturally.One week after the burn, four 100 m line-intercept transects were …