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6,569 results for “Long-term”
Litter carbon and nitrogen: Long-Term Nitrogen Deposition During Grassland Succession
The purpose of this experiment is to measure how initially disturbing an area and 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. This experiment is conducted within fields (A, B, and C) which were initially low in soil nutrients. The ground was disturbed by thoroughly disking the area prior to establishment of the experiment. 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. Nitrogen fertilizer (NH4NO3) is applied twice per year, once in early May and once in late June. There are six replicates of each treatment per field. The treatments were randomly assigned to plots of size 4 by 4 meters. The plots are in 6 plot by 9 plot grids with 1 meter aisles between plots. The plot grids are enclosed by a fence to keep out mammalian herbivores. Gophers are trapped and removed as they appear. In the spring of 1992, subexperiments E097 and E098 were established. E097 is in fields A and C where randomly selected plots within each treatment no longer receive fertilizer. E098 is in field B where randomly selected plots within each treatment are burned. Note that the design of E002 is similar to E001 except E002 was thoroughly disked prior to establishment.
Root Carbon and Nitrogen: Long-Term Nitrogen Deposition During Grassland Succession
The purpose of this experiment is to measure how initially disturbing an area and 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. This experiment is conducted within fields (A, B, and C) which were initially low in soil nutrients. The ground was disturbed by thoroughly disking the area prior to establishment of the experiment. 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. Nitrogen fertilizer (NH4NO3) is applied twice per year, once in early May and once in late June. There are six replicates of each treatment per field. The treatments were randomly assigned to plots of size 4 by 4 meters. The plots are in 6 plot by 9 plot grids with 1 meter aisles between plots. The plot grids are enclosed by a fence to keep out mammalian herbivores. Gophers are trapped and removed as they appear. In the spring of 1992, subexperiments E097 and E098 were established. E097 is in fields A and C where randomly selected plots within each treatment no longer receive fertilizer. E098 is in field B where randomly selected plots within each treatment are burned. Note that the design of E002 is similar to E001 except E002 was thoroughly disked prior to establishment.
Soil carbon: 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.
Field C Microplot Arthropod Sweepnet Sampling: 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.
Soil nitrate and ammonium: 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.
Long-Term Nitrogen Deposition During Grassland Succession: 2018 broad soil chemistry
The purpose of this experiment is to measure how initially disturbing an area and 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. This experiment is conducted within fields (A, B, and C) which were initially low in soil nutrients. The ground was disturbed by thoroughly disking the area prior to establishment of the experiment. 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. Nitrogen fertilizer (NH4NO3) is applied twice per year, once in early May and once in late June. There are six replicates of each treatment per field. The treatments were randomly assigned to plots of size 4 by 4 meters. The plots are in 6 plot by 9 plot grids with 1 meter aisles between plots. The plot grids are enclosed by a fence to keep out mammalian herbivores. Gophers are trapped and removed as they appear. In the spring of 1992, subexperiments E097 and E098 were established. E097 is in fields A and C where randomly selected plots within each treatment no longer receive fertilizer. E098 is in field B where randomly selected plots within each treatment are burned. Note that the design of E002 is similar to E001 except E002 was thoroughly disked prior to establishment.
Soil phosphorous: 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.
Gull Lake long-term Microcystis monitoring at the Kellogg Biological Station, Hickory Corners, MI (1998 to 2014)
Dataset Abstract This dataset consists of 13 years of observations of Microcystis biomass and microcystin in an oligotrophic lake (Gull Lake, MI, USA), where it is promoted by invasive zebra mussels (Dreissena polymorpha). Annual means are reported for all variables. As originally published, the data were used to assess the influence of interannual variation in water temperature and zebra mussel mortality on Microcystis dynamics in an oligotrophic lake original data source http://lter.kbs.msu.edu/datasets/165
Long-term Dynamics in Soil Field Available Nitrogen and Potentially Mineralizable Nitrogen in a Chihuahuan Desert Grassland at the Sevilleta National Wildlife Refuge, New Mexico (1989-2014)
Associated with a project that was based upon the assumption that nitrogen may limit net primary plant production in desert grasslands, this project began measuring available inorganic soil N and potentially mineralizable N of soils at two desert grassland locations. Both available N and potentially mineralizable N were greatest following a drought period in 1989, declined during wetter periods that followed and remained relatively stable until another extended drought period. After drought in 1995-6, both forms of soil N increased, indicating the potential for greater NPP following drought and lower potential NPP during periods of normal precipitation.
SGS-LTER Long-Term Monitoring Project: Body weights of rodents captured during SGS-LTER live-trapping on the Central Plains Experimental Range, Nunn, Colorado, USA 1994 -2011, ARS Study Number 118
This data package was produced by researchers working on the Shortgrass Steppe Long Term Ecological Research (SGS-LTER) Project, administered at Colorado State University. Long-term datasets and background information (proposals, reports, photographs, etc.) on the SGS-LTER project are contained in a comprehensive project collection within the Digital Collections of Colorado (http://digitool.library.colostate.edu/R/?func=collections&collection_id=3429). The data table and associated metadata document, which is generated in Ecological Metadata Language, may be available through other repositories serving the ecological research community and represent components of the larger SGS-LTER project collection. Additional information and referenced materials can be found: http://hdl.handle.net/10217/83452. Body size is a fundamental biological measurement that is known to be related to an organism's physiology, life-history and ecology. Estimates of body size are also widely used in comparative evolutionary and ecological studies, including food web and diet studies that require estimates of biomass. Beginning in 1994, small mammals are live-trapped twice each year on the three grassland and three shrubland trapping webs. Individuals are weighed (to nearest 0.5 g using a Pesola spring scale) when first captured during a given trapping session but not upon recapture during the same session. Weights are calculated by subtracting the weight of an empty capture (ziploc) bag from the weight of animal in the bag. Individuals are classified into age classes (adult, subadult, juvenile) in the field based on a combination of size and pelage characteristics. This dataset gives means, standard deviations, minimum and maximum values for body weight, in grams, of small mammals captured between September 1994 and September 2008. All sites and sampling periods were combined. Most individuals (~93%) were classified as new captures, although a few individuals that were captured multiple time
Development of a neural interface for high-definition, long-term recording in rodents and nonhuman primates
<p>Data set and code used to generate figures in "Development of a neural interface for high-definition, long-term recording in rodents and nonhuman primates".</p> <p> </p>
Supplementary data for the article "Ayahuasca Users in Estonia: Ceremonial Practices, Subjective Long-Term Effects, Mental Health and Quality of Life"
<p>The dataset contains qualitative data from a study of ayahuasca users in Estonia:</p> <p>Appendix 1 - Appendix 6: free-text answers (shuffled and edited for protection of confidentiality of the respondents), in Estonian.</p> <p>Appendices 7 and 8: study-specific questionnaires, in Estonian.</p> <p>The dataset provides supplementary information for the article "Ayahuasca Users in Estonia: Ceremonial Practices, Subjective Long-Term Effects, Mental Health and Quality of Life" (authors Helle Kaasik and Kairi Kreegipuu from University of Tartu, Estonia), submitted to <a href="https://www.tandfonline.com/loi/ujpd20">the Journal of Psychoactive Drugs</a> on April 30, 2019 and accepted for publication on December 3, 2019. More information about the study is available from Helle Kaasik (<a href="mailto:helle.kaasik@ut.ee">helle.kaasik@ut.ee</a>).</p> <p> </p> <p>In Estonian:</p> <p>Andmehulk sisaldab kvalitatiivseid andmeid Eesti ayahuasca kasutajate uurimisest.</p> <p>Lisa 1-6: vabatekstilised vastused (juhuslikus järjekorras ja toimetatud vastajate konfidentsiaalsuse tagamiseks);</p> <p>Lisa 7-8: uurimuses kasutatud küsimustikud.</p> <p>Andmestik on täienduseks teadusartiklile "Ayahuasca Users in Estonia: Ceremonial Practices, Subjective Long-Term Effects, Mental Health and Quality of Life", mille autorid on Helle Kaasik ja Kairi Kreegipuu Tartu Ülikoolist. Artikkel on saadetud avaldamiseks ajakirjale <a href="https://www.tandfonline.com/loi/ujpd20">Journal of Psychoactive Drugs</a>. Kommentaarid ja küsimused töö kohta on oodatud Helle Kaasiku e-mailile <a href="mailto:helle.kaasik@ut.ee">helle.kaasik@ut.ee</a></p>
Long-Term Wi-Fi fingerprinting dataset and supporting material
<p>WiFi measurements database for UJI's library and supporting material.</p> <p>The measurements were collected by one person using mainly one Android smartphone during 25 months at two floor of the library building from Universitat Jaume I, in Spain. It contains 103,584 WiFi fingerprints, which are organized into datasets. Each dataset is the result of a collection campaign.</p> <p>The supporting material includes Matlab® scripts to load and filter the desired data, and provides examples on possible studies that the database may enable. The supporting material also includes the bookshelves local coordinates.</p> <p>Citation request:</p> <p>Mendoza-Silva, G.M.; Richter, P.; Torres-Sospedra, J.; Lohan, E.S.; Huerta, J. Long-Term WiFi Fingerprinting Dataset for Research on Robust Indoor Positioning. <em>Data</em> <strong>2018</strong>, <em>3</em>, 3.</p> <p>G.M. Mendoza-Silva, P. Richter, J. Torres-Sospedra, E.S. Lohan, J. Huerta, "Long-Term Wi-Fi fingerprinting dataset and supporting material", Zenodo repository, DOI 10.5281/zenodo.1066041.</p> <p> </p>
Data and Code to support COVID-19 - exploring the implications of long-term condition type and extent of multimorbidity on years of life lost: a modelling study
<p>Data and code to support paper published in Wellcome Open research on years of life lost among people who died with COVID-19.</p>
Nonylphenol in soil-celery system simulating long-term reclaimed water irrigation: occurrence, migration, and health risk assessment
<p>The data uploaded were the biomass of celery tissues and the concentraion of nonylphenol in soil and celery tissues after harvest.</p>
Extended Data Fig. 7 in Skeleton of a Cretaceous mammal from Madagascar reflects long-term insularity
Extended Data Fig. 7 | Selected individual vertebrae of A. hui holotype (UA 9030). Thoracic (T6 and T16),lumbar (L1 and L11) and anterior caudal (Ca8) vertebrae are depicted in anterior,dorsal,left lateral and ventral views.The left transverse process of L11 is preserved but was separated from the vertebral column during preparation and has not been CT scanned.Dotted outlines represent the shape of preserved left transverse process,and the mirrored reconstructed right transverse process.
Extended Data Fig. 8 in Skeleton of a Cretaceous mammal from Madagascar reflects long-term insularity
Extended Data Fig. 8 | Limb bone elements of A. hui holotype (UA 9030). a–p, ΜCT images.a, b, Left humerus in anterior (a) and posterior (b) views. c, d, Left ulna in anterior (c) and lateral (d) views.e, f, Left radius in anterior (e) and lateral (f) views.g, h, Left manus in dorsal (g) and palmar (= ventral) (h) views.i, j, Left femur in anterior (i) and posterior (j) views.k, l, Left tibia in anterior (k) and lateral (l) views.m, n, Left fibula in anterior (m) and lateral (n) views.o, p, Left pes in dorsal (o) and plantar (= ventral) (p) views.
Extended Data Fig. 1 in Skeleton of a Cretaceous mammal from Madagascar reflects long-term insularity
Extended Data Fig. 1 | Photographs of the skeleton of A. hui holotype (UA 9030). a, b, 'Top' (a) and 'bottom' (b) views, as preserved.The left and right sides are indicated as (l) and (r), respectively.as,astragalus;at, atlas;av, anticlinal vertebra;ax,axis; C, cervical vertebra;ca,calcaneus;Ca,caudal vertebra;cap,capitate;CC,costal cartilage; cl, clavicle; cor, coracoid;cu, cuboid;dpp,distal pedal phalanx;ent, entocuneiform;ep,epipubis; fe,femur; fi, fibula;ha,hamate;hu, humerus;i, lower incisor; ID, distal upper incisor; IM, medial upper incisor;imp,intermediate manual phalanx;ipp,intermediate pedal phalanx; L, lumbar vertebra;lu, lunate; m, mandible;mc,metacarpal;mt, metatarsal;na,navicular;osc, os calcaris;pc1, lower first postcanine tooth; PC1, upper first postcanine tooth; pe,pelvis;pfi, parafibula; pi, pisiform;pmp, proximal manual phalanx;ppp,proximal pedal phalanx;R, rib; ra, radius; sc, scapula;sca,scaphoid;stb, sternebra;T,thoracic vertebra; ti, tibia;tr, triquetrum; ul, ulna.
Extended Data Fig. 6 in Skeleton of a Cretaceous mammal from Madagascar reflects long-term insularity
Extended Data Fig. 6 | Enamel microstructure of A. hui holotype (UA 9030). a–d, Scanning electron micrographs of single postcanine tooth enamel fragment sectioned in various planes.a, Transverse section of entire enamel band from the enamel–dentine junction (EDJ) to the outer enamel surface (OES) (about 0.4-mm thick) showing single layer of radial enamel and absence of distinct layer of prismless external enamel.Prism size increases from,on average,2.3 to 2.8 Μm from the enamel–dentine junction to the outer enamel surface.Prisms close to the enamel–dentine junction are intersected by interprismatic matrix at slightly higher angles than towards the outer enamel surface.b, Transverse section showing the clear distinction between enamel prisms and interprismatic matrix. c, Radial section showing radial enamel in outer zone with prisms surrounded by interprismatic matrix and some cross-sections of prisms showing tubules.d, Radial,but slightly oblique, section showing enamel of inner zone with prisms enveloped by interprismatic matrix and presence of odontoblastic processes.In this zone,crystallites of interprismatic matrix lie almost perpendicular to those of prisms.Prisms rise from the enamel–dentine junction at angle of about 45°; this angle is reduced only slightly towards the outer enamel surface.IPM, interprismatic matrix; od, odontoblastic process; p, prism; tu,tubule.
Extended Data Fig. 4 in Skeleton of a Cretaceous mammal from Madagascar reflects long-term insularity
Extended Data Fig. 4 | Inner ear of A. hui holotype (UA 9030). a, Ventral view of reconstructed cranium, with petrosal fragment bounded by red line enlarged in a'. b–e, Reconstructed cochlear canal in dorsomedial (b), ventrolateral (c) and posteroventromedial (d, e) views,with the view in d being slightly more posterior and the view in e slightly more medial.In e, only the medial aspect of cochlear canal in grey is shown, to reveal primary bony lamina and cochlear nerve foramina.Semi-transparent grey,cochlear canal;yellow, cochlear nerve;blue, secondary canal.
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These curated guides explain access requirements, typical timelines, costs, and reuse considerations for widely used research datasets.
Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.