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3,682 results for “ROOTS”
Alaska Peatland Experiment: 2009 All sites Root Biomass data taken during peak biomass (late July)
This dataset includes root biomass data taken at peak biomass during the 2009 growing season. Data was collected at the Alaskan Peatland Experiment sites. Sites included: Alpha, Beta, Gamma, and the Gradient.
Alaska Peatland Experiment: 2010 Alpha Root Biomass data taken during peak biomass (late July)
This dataset includes root biomass data taken at peak biomass during the 2010 growing season. Data was collected at the Alaskan Peatland Experiment Alpha site. Root biomass was collected for the root respiration experiment conducted at the control plot of the Alpha site. The root respiration experiment was used to partition root respiration from ecosystem respiration at the control plot.
Alaska Peatland Experiment: 2011 Gradient Root Biomass data taken during peak biomass (late July)
This dataset includes root biomass data taken at peak biomass during the 2011 growing season. Data was collected at the Alaskan Peatland Experiment Gradient site. Root biomass was collected for the root respiration experiment conducted at the Sedge/forb and control plots of the Gradient site. The root respiration experiment was used to partition root respiration from ecosystem respiration a both of these plots.
Alaska Peatland Experiment: 2011 Beta Root Biomass data taken during peak biomass (late July)
This dataset includes root biomass data taken at peak biomass during the 2011 growing season. Data was collected at the Alaskan Peatland Experiment Beta and Gamma sites.
Alaska Peatland Experiment: 2010-2011 Root Respiration Experiment Root Fluxes
This dataset includes root respiration data collected at peak biomass during the 2010 and 2011 growing season along the wetland gradient. Data for 2010 was taken at the rich fen only and data for the 2011 season was taken at the rich fen and sedge/forb fen.
Alaska Peatland Experiment: 2010-2011 Root Respiration Experiment Aboveground biomass
This dataset includes aboveground biomass data collected at peak biomass during the 2010 and 2011 growing season along the wetland gradient. Data for 2010 was taken at the rich fen only and data for the 2011 season was taken at the rich fen and sedge/forb fen.
Alaska Peatland Experiment: 2010-2011 Root Respiration Experiment Ecosystem Respiration Fluxes
This dataset includes Ecosystem respiration data collected at peak biomass during the 2010 and 2011 growing season along the wetland gradient. Data for 2010 was taken at the rich fen only and data for the 2011 season was taken at the rich fen and sedge/forb fen.
Alaska Peatland Experiment: 2010-2011 Root Respiration Experiment Percent Cover
This dataset includes percent cover data collected at peak biomass during the 2010 and 2011 growing season along the wetland gradient. Data for 2010 was taken at the rich fen only and data for the 2011 season was taken at the rich fen and sedge/forb fen.
Alaska Peatland Experiment: 2010-2011 Root Respiration Experiment Soil Descriptions
This dataset includes soil description data from soil cores collected at peak biomass during the 2010 and 2011 growing season along the wetland gradient. Data for 2010 was taken at the rich fen only and data for the 2011 season was taken at the rich fen and sedge/forb fen.
Alaska Peatland Experiment: 2010-2011 Root Respiration Experiment Vascular Green Area
This dataset includes vascular green area data collected at peak biomass during the 2010 and 2011 growing season along the wetland gradient. Data for 2010 was taken at the rich fen only and data for the 2011 season was taken at the rich fen and sedge/forb fen.
Effects of permafrost thaw on nitrogen availability and plant-soil interactions in a boreal Alaskan lowland: III - Root Abundance 2013
This dataset examines shifts in rooting along a lowland boreal permafrost thaw chronosequence. Data was collected in 2013 at the APEX Beta and forested study plots, located adjacent to the BNZ experimental forest.
Post-fire succession in 1994 Hajdukovich Creek Burn: measurements of root biomass, shoot biomass, total plant C content, total plant N content for aspen and spruce
This dataset contains measurements of root biomass, shoot biomass, total plant C, and total plant N of 10 aspen and 10 spruce saplings harvested in one severely burned and one lightly burned site in the 1994 Hajdukovich Creek burn.
ARISA profiles for root-associated fungal communities associated with seedlings that established after fire and adjacent shrubs harvested at Finger Mountain and Nome Creek in 2009
This dataset contains the ARISA profiles of the root-associated fungal communities associated with seedlings that established after the 2004 fires and the closest resprouting shrub.
Root biomass data: Long-Term Nitrogen Deposition: Population, Community, and Ecosystem Consequences
The purpose of this experiment is to measure how adding nitrogen over a long time will affect the number of species, the type of species present, the amount of annual growth, and the change from year to year in the growth of each species in a plant community which is also relieved of grazing by large and small mammals. The experiment is being conducted within fields (A, B, C, and D) which were initially low in soil nutrients. There are 8 different levels of nitrogen addition with other nutrients added to ensure that nitrogen remains the limiting nutrient, and a control which receives no nutrients. There are 6 replicates of the 9 treatments in fields A, B, and C and 5 replicates in field D. The treatments were randomly assigned to the plots. In fields A, B, and C the plots are in 6 by 9 grids and are 4 by 4 meters in size with 1 meter aisles between plots. In field D the plots are 1.5 by 4 meters and are placed in a 3 by 17 grid. The plots are enclosed by a fence to keep out mammalian herbivores. Gophers are trapped and removed as they appear. Nitrogenfertilizer (NH4NO3) is applied twice per year, once in early May and once in late June. This experiment was begun in 1982 by David Tilman.
Root biomass data: Biodiversity II: Effects of Plant Biodiversity on Population and Ecosystem Processes
Biodiversity II (E120) is designed to determine how the number of plant species affects the dynamics of ecological processes at the population, community, and ecosystem levels. By experimentally manipulating the number of species and the kinds of species, the amount of plant growth and the change from year to year, that result can be examined. Plots are large (9m x 9m actively maintained) and well-replicated, allowing responses of plant pathogens, insect herbivores, seed predators, soil parameters, invasive plant species and other variables to also be studied. Plots were seeded in May 1994 to have 1, 2, 4, 8, or 16 species, with roughly 30 replicates of each diversity level. The species composition of each plot was chosen by random draw from a pool of 18 grassland perennials that included four warm-season (C4) grasses, four cool-season (C3) grasses, four legumes, four non-legume forbs, and two woody species. All species occur in monoculture allowing comparison of responses of each species in monoculture to combinations of these same species. The experiment was established in 1994 by the lead investigators David Tilman, Peter Reich, Johannes Knops, and David Wedin. Experiment 120 is similar to Experiment 123, but it uses larger plots to provide a large capacity for long-term subexperiments.
Root biomass carbon and nitrogen: Old-Field Chronosequence: Plant Productivity
The goal of this research is to study the change in plant growth and species distribution during succession. Annual plant growth above ground is annually sampled in more than 20 fields from 4 permanently marked 3m x 4m plots in each field. These fields were previously cultivated, but then abandoned from agriculture at various times in the past. The fields were left undisturbed for plants to develop from seeds within the soil or brought into the fields by wind or animals. The fields included in this study are 4, 5, 10, 24, 26, 28, 35, 39, 41, 45, 53, 70, 72, 77 and the Lawrence strip that was abandoned in 1988. This experiment was started in 1987 by lead investigators David Tilman and Johannes Knops. In 2001 new sampling was started in positions similar to the E054 plots in these E014 fields: 21, 27, 32, 40, 44, 47, 76. Past work at CDR and elsewhere has demonstrated an overriding influence of fire frequency in maintaining prairie openings and oak savanna at the prairie-forest border. Fire regimes harm some types of species while favoring others and drive light and nutrient dynamics, which in turn drive community functional attributes and diversity levels. Ultimately, fire frequency interacts with climate, N deposition, land use, and biotic invasion to determine the outcomes of tree-grass interactions and the dynamics of vegetation at ecotones such as the prairie-forest border in Minnesota. In 2006 each field was divided in half, and one half randomly chosen for periodic prescribed burning (a fire every other year). We anticipate that the burned half will continue succession to prairie grassland while the unburned half will become white pine stands if seed sources are nearby, or will otherwise undergo extremely slow succession to oaks.
Ectomycorrhizal fungal effects on soil carbon storage, root litter decomposition, and fungal necromass decomposition
This project investigates the impacts of ectomycorrhizal-saprotrophic fungal interactions on soil C storage and the decomposition of root litter and fungal necromass. Specifically, we conducted a field experiment wherein the ectomycorrhizal:saprotrophic fungal ratio was reduced via experimental trenching (with control plots left untrenched). From these plots we then measured bulk soil C stocks, particulate organic matter C stocks, mineral associated organic matter C stocks, and the decomposition of root litter and fungal necromass. The Cedar Creek Ecosystem Science Reserve (CCESR) experiment name is e309 "The effects of mycelial morphology and mycorrhizal type on fungal necromass decomposition."
Fine root dynamics along an elevational gradient in the southern Appalachian mountains in the Coweeta Hydrologic Laboratory from 1993 to 1994
Annual rates of fine root mass appearance and disappearance were calculated from samples of fine roots taken in soil cores over time on the five gradient plots.
Fine root dynamics along an elevational gradient in the southern Appalachian mountains in the Coweeta Hydrologic Laboratory from 1994 to 1995 (lengths of fine root segments)
The lengths of fine root segments visible in photographs of roots growing against the windows of minirhizotron boxes were measured.
Leaf nutrient and root biomass data from the Peat Collapse-Saltwater Intrusion Field Experiment within Everglades National Park (FCE), collected from October 2014 to September 2016
With sea level rise increasing, saltwater intrusion into low-lying coastal wetlands is likely to occur. We simulated saltwater intrusion into an Everglades marsh through monthly additions of elevated salinity water. Yearly sawgrass leaf carbon, nitrogen, and phosphorus concentrations and live root biomass measurements were measured from a brackish water and freshwater marsh. All measurements were taken every other month 24 hours after dosing. Measurements occurred from Oct 2014 - Sep 2016. Ecosystem flux measured includes gross ecosystem production, ecosystem respiration of CO2, net ecosystem production, and ecosystem respiration of CH4. These data are published in Wilson, B.J., Servais, S., Mazzei, V., Davis, S.E., Kelly, S., Gaiser, E., Kominoski, J.S., Richards, J., Rudnick, D., Sklar, F., Stachelek, J., and Troxler, T.G. Salinity pulses interact with seasonal dry-down to increase ecosystem carbon loss in marshes of the Florida Everglades. Ecological Applications. Accepted.
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