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8,175 results for “additive”

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edi44/100

Data from: 'A large, infrequent ecosystem subsidy (cicada carcasses) and warming additively accelerate development and increase growth of larval amphibians'

These data are from an experiment designed to quantify how ecosystem subsidies and elevated temperatures affect pond food webs, focusing on the response of frogs and the mechanisms affecting their responses. The subsidy we examined was the deposition of periodical cicada carcasses into ponds, simulating a large subsidy event that happens only every 17 years. The 7-week experiment was conducted in outdoor tanks using a factorial design with four treatments: Control (no subsidy, ambient temperature); Cicadas (cicada carcasses added in one large pulse); Warming (temperature elevated about 2.6°C above ambient); and Cicadas & Warming. The data set includes two frog response variables: time to metamorphosis (days) and size at metamorphosis (g wet mass). It also includes temperature in each tank, measured at 30-minute intervals. In addition, it includes data designed to characterize resource supply to frogs, including the abundance of periphyton and phytoplankton measured as chlorophyll concentration; periphyton and phytoplankton composition at the Division level using data from a spectrofluoroprobe; and water column nutrient concentrations, including ammonium, nitrate, total nitrogen, soluble reactive phosphorus, and total phosphorus. In addition, we estimated algal gross primary production using data on dissolved oxygen measured at 30-minute intervals, and include oxygen data here. Finally, we measured the rate at which cicada carcasses and leaf litter decomposed, and dissolved organic carbon concentrations at the end of the experiment, as these data may shed light on factors affecting nutrient supply to algae as well as ecosystem respiration rates, which are used to estimate gross primary production rates. Thus, we include data on the mass of cicada carcasses and leaf litter on several dates, as well as DOC concentrations on the last day of the experiment.

openCC0Aug 2025View details →
edi44/100

Stable isotope and conservative tracer data used to estimate uptake of stream water dissolved organic carbon (DOC) through a whole-stream addition of a ¹³C-DOC tracer coupled with laboratory measurements of bioavailability of the tracer and stream water DOC using lability profiling with bioreactors

We performed a whole-stream addition of a ¹³C-DOC tracer and made laboratory measurements of the biological availability of the tracer as well as stream water DOC. The study was performed in October 2002 in a 1.27 km stretch of the third-order White Clay Creek in southeastern Pennsylvania. The tracer was prepared as a cold-water leachate of ¹³C-labeled tulip poplar saplings and it was added to the stream along with sodium bromide, a conservative tracer, over a 2-h period. Stream water samples were collected at 8 downstream stations over an 8-h period, filtered, and analyzed for concentrations of bromide and DOC. DOC was measured by Pt-catalyzed, persulfate oxidation, Br- was analyzed by ion chromatography, and C isotope samples were rotary evaporated, acidified, lyophilized, combusted, and the CO₂ analyzed with an elemental analyzer interfaced with an isotope ratio mass spectrometer. Lability profiling of the ¹³C-DOC tracer and stream water DOC were performed with a series of plug-flow bioreactors of increasing empty-bed contact times with the concentration of biodegradable DOC operationally defined as the difference between the DOC concentrations in the influent and effluent waters of the bioreactors. The bioreactor measurements were performed 2 days after the whole-stream release. Data were analyzed to estimate the uptake of stream water DOC associated with labile and semi-labile fraction of biodegradable DOC. These data have been previously used in a 2008 publication in Freshwater Biology, doi:10.1111/j.1365-2427.2007.01941.x.

openCC (other)May 2019View details →
edi44/100

Long-term trends in abundance of Lepidoptera larvae at Hubbard Brook Experimental Forest and three additional northern hardwood forest sites, 1986-2018 (Reformatted to a Darwin Core Archive)

This data package is formatted as a Darwin Core Archive (DwC-A, event core). For more information on Darwin Core see https://www.tdwg.org/standards/dwc/. This Level 2 data package was derived from the Level 1 data package found here: https://pasta.lternet.edu/package/metadata/eml/edi/349/2, which was derived from the Level 0 data package found here: https://pasta.lternet.edu/package/metadata/eml/knb-lter-hbr/82/8. The abstract below was extracted from the Level 0 data package and is included for context: Numbers and lengths of Lepidoptera larvae (caterpillars, all species) were censused on shrub level foliage at biweekly intervals from late May/early June through late July/early August each year. Measurements were conducted on the Main bird plot in the Hubbard Brook Experimental Forest and on three additional plots within the White Mountain National Forest from 1986-1997.. These data were gathered as part of the Hubbard Brook Ecosystem Study (HBES). The HBES is a collaborative effort at the Hubbard Brook Experimental Forest, which is operated and maintained by the USDA Forest Service, Northern Research Station.

openCC (other)Sep 2021View details →
edi44/100

Belowground foodweb biomass from moist acidic tundra and dry heath tundra nutrient addition and herbivore exclusion plots (since 1996) sampled Summer 2006

Biomass of belowground community groups (bacteria, fungi, protozoa, nematodes, rotifers, tardigrades) determined for organic soils in moist acidic tundra and dry heath tundra.

openOpenDec 2015View details →
edi44/100

Belowground foodweb biomass from moist acidic tundra nutrient addition and greenhouse plots (since 1989) sampled July 2008.

Biomass of belowground community groups (bacteria, fungi, protozoa, nematodes, rotifers, tardigrades) determined for organic and mineral soils in moist acidic tundra sampled in the moist acidic tundra nutient (N&P) addition and greenhouse plots in July 2008.

openOpenDec 2015View details →
edi44/100

Belowground foodweb biomass and soil CN and bulk density from moist acidic tundra nutrient addition plots (since 1989, 2006) sampled July 2011.

Biomass of belowground community groups (bacteria, fungi, protozoa, nematodes, rotifers, tardigrades) determined for organic and mineral soils in moist acidic tundra. Soil carbon and nitrogen content, bulk density, and depth are included.

openOpenDec 2015View details →
edi44/100

Belowground foodweb biomass from moist acidic tundra nutrient addition plots (since 1989, 1996, 2006) sampled June and August 2010.

Biomass of belowground community groups (bacteria, fungi, protozoa, nematodes, rotifers, tardigrades) determined for organic and mineral soils in moist acidic tundra.

openOpenDec 2015View details →
edi44/100

Belowground foodweb biomass and soil CN and bulk density from moist acidic tundra nutrient addition plots (since 2006) sampled August 2012.

Biomass of soil rotifers, tardigrades, enchytraeids, protozoa and nematode groups from organic and mineral soils in moist acidic tundra nutrient addition plots (since 2006) sampled August 2012.

openOpenDec 2015View details →
edi44/100

Soil aggregate size distribution and particulate organic matter content from Arctic LTER moist acidic tundra nutrient addition plots, Toolik Field Station, Alaska, sampled July 2011.

Soil aggregate size distribution, aggregate carbon and nitrogen, and light fraction carbon were determined for mineral soils in moist acidic tundra. Soil was sampled in control, and N+P plots of the Arctic LTER Moist Acidic Tundra plots established in 1989 and 2006.

openOpenDec 2015View details →
edi44/100

Extracellular enzyme activities in soils from Arctic LTER moist acidic tundra nutrient addition plots, Toolik Field Station, Alaska, sampled July 2011.

Soil samples were collected from control, and N+P plots from within a set of treatments in Arctic LTER Moist Acidic Tundra plots established in 1989 and in 2006 . At the time of sampling the soil was separated into organic horizon, organic/mineral interface, and the upper 5cm of the mineral soil. In the lab the potential activities of seven hydrolytic enzymes was determined using fluorometric techniques (Saiya-Cork et al. 2002) modified following Steinweg et al(.2012).

openOpenDec 2015View details →
edi44/100

Del 13C-CO2 of in situ soil respiration post tracer addition

This dataset contains non-destructive, sequential 13C isotope measurements of soil CO2 flux following injection in situ with isotopically labeled glycine or deionized water (DIW). Data derive from a multiyear experiment covering seven forest ecosytem types located across three major biomes: southern temperate, northern temperate, and boreal forest. This data can be sorted and viewed by stand type, field replicate, treatment (glycine vs. DIW), sampling period (0.75-336 h post treatment), and sampling time (duration of measurement).

openOpenJan 2013View details →
edi44/100

Stream TASCC nutrient additions conducted in headwater streams of the Caribou-Poker Creeks Research Watershed (CPCRW) and along the Steese Highway during the summer of 2013.

Instantaneous additions of acetate-DOM, birch leachate-DOM, N+P, N alone, and P alone were conducted in headwater streams of the Caribou-Poker Creeks Research Watershed (CPCRW) and along the Steese Highway during the summer of 2013 to characterize how DOM affected uptake of inorganic N and P. Nutrient uptake was calculated using the TASCC method (Covino et al. 2010) and stream water chemistry was analyzed by colorimetric and chromatographic methods.

openOpenMar 2015View details →
edi44/100

Multiple Element Limitation in Northern Hardwood Ecosystems (MELNHE): Nitrogen and phosphorus additions affect fruiting of ectomycorrhizal fungi in a temperate hardwood forest, 2018

The functioning of mycorrhizal symbioses is tied to soil nutrient status, suggesting that nutrient availability should influence the reproduction of mycorrhizal fungi. To quantify the effects of nitrogen (N) and phosphorus (P) availability on ectomycorrhizal fungal fruiting, we collected > 4,000 epigeous sporocarps representing 19 families during the course of a season in a full factorial NxP addition experiment in six replicate forest stands. Nutrient effects on fruiting shifted as the season progressed, with early fruiting species responding more to P and late-fruiting species responding more to N. The composition of species fruiting in young successional forests differed more with nutrient addition than in mature forests. Sporocarp abundance and species richness were suppressed by N addition. This work shows that N and P availability affect ectomycorrhizal fungal fruiting, with these effects taking place within a context defined by stand age and the progression of fruiting across the season. The data table in this data package contains the sprorocarp observation counts and biomass. Corresponding DNA sequences can be found in GenBank at: https://www.ncbi.nlm.nih.gov/nuccore/?term=MT345178%3AMT345282%5Baccn%5D Additional detail on the MELNHE project, including a datatable of site descriptions and a pdf file with the project description and diagram of plot configuration can be found in this data package: https://portal.edirepository.org/nis/mapbrowse?packageid=knb-lter-hbr.344.2 These data were gathered as part of the Hubbard Brook Ecosystem Study (HBES). The HBES is a collaborative effort at the Hubbard Brook Experimental Forest, which is operated and maintained by the USDA Forest Service, Northern Research Station.

openCC (other)Sep 2024View details →
edi44/100

SNE01 Species richness, community evenness (Evar) and ANPP effects of nitrogen addition across a gradient of 8 levels in a semi-arid shortgrass steppe and a mesic tallgrass prairie, 2014-2018

This dataset contains the first five years (2014-2018) of the effect of nitrogen addition on species richness, species evenness (Evar) and productivity for a long-term nitrogen addition gradient experiment in two North American grasslands: a semi-arid shortgrass steppe and a mesic tallgrass prairie. Fertilization with time-release urea has been on-going since 2014 in a gradient of eight levels: 0, 2.5, 5, 10, 15, 20, 30 g/m-2. The effect of nitrogen on richness, evenness and Aboveground Net Primary Productivity (ANPP g/m-2 yr) is calculated as the absolute change in value from control plots to treatment plots within each block.

openCC0Feb 2025View details →
zenodo40/100

Additional material for "Sharp Congruences Adequate with Temporal Logics Combining Weak and Strong Modalities"

<p>Complementary material including the proofs of all theorems presented at TACAS 2020, a detailed description of the RERS 2019 experiment, and the actual data used for the RERS 2018,RERS 2019, and TFTP experiments.</p>

opencc-by-4.0Jan 2020View details →
zenodo40/100

FIG. 5 in Additional data towards the knowledge of european Podismini Jacobson, 1905 (Orthoptera, Acrididae, Melanoplinae)

FIG. 5. — Epiphallus of male in dorsal view: A, Peripodisma llofizii n. sp.; B, Peripodisma tymphii Willemse, 1972. Abbreviations: Ap, anterior projection; Lp, lateral pons; Pp, posterior projection; Lo, lophus; Po, pons; An, ancora. Scale bar: 1 mm.

opencc-zeroJun 2015View details →
zenodo40/100

FIG. 3 in Additional data towards the knowledge of european Podismini Jacobson, 1905 (Orthoptera, Acrididae, Melanoplinae)

FIG. 3. — Abdominal apex of male: A, Peripodisma llofizii n. sp.; B, Peripodisma tymphii Willemse, 1972.

opencc-zeroJun 2015View details →
zenodo40/100

Figures 18–24. Bahamas Pterophoridae pinned adults. 18 in Additions to the plume moth fauna of The Bahamas (Lepidoptera: Pterophoridae) with description of four new species

Figures 18–24. Bahamas Pterophoridae pinned adults. 18) Hellinsia unicolor ♂, Abaco, 1.vi.2016. 19) Hellinsia bahamensis Matthews, new species, ♀, holotype, Grand Bahama Island, 27.x.2014. 20) Hellinsia lucayana Matthews, new species, ♂, holotype, Crooked Island, 8.vi.2015. 21) Adaina perplexus ♀, Long Island, 31.v–1. vi.2014. 22) Adaina thomae ♀, Crooked Island, 7.vi.2015. 23) Adaina simplicius ♂, Abaco, 30.x.2014. 24) Adaina ambrosiae ♀, Abaco, 3.vi.2016. Scale line below each name equals 1 mm.

opencc-by-4.0Jun 2019View details →
zenodo40/100

Figure 1 in A new genus and species of Onciderini Thomson, 1860 (Coleoptera: Cerambycidae: Lamiinae) from Ecuador, with notes on additional taxa

Figure 1. Velozideres buntyni gen. and sp. nov., holotype male: a) Dorsal habitus. b) Lateral habitus. c) Close-up of head. d) Close-up of pronotum and elytral humeri.

opencc-by-4.0May 2019View details →
zenodo40/100

Figures 25–28. Bahamas Pterophoridae male genitalia. 25a in Additions to the plume moth fauna of The Bahamas (Lepidoptera: Pterophoridae) with description of four new species

Figures 25–28. Bahamas Pterophoridae male genitalia. 25a) Lioptilodes albistriolatus, slide DM 2159. 25b) phallus, same individual. 26a) Lantanophaga pusillidactylus, slide DM 2161. 26b) phallus, same individual. 27a) Postplatyptilia flinti, slide DM 2099. 27b) phallus, same individual. 28a) Stenoptilodes brevipennis, slide DM 2101. 28b) phallus, same individual.

opencc-by-4.0Jun 2019View details →

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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.

allen-brain-atlas
neuroscienceopenDocumentation, web resources, and API references are available online.
Last verified 2026-04-30Open record

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.

abode-home-cage
behavioral-neuroscienceopenThe DataShare record exposes download links for annotations, documentation, license text, and the zipped per-snippet data directory.
Last verified 2026-04-30Open record

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.

dandi-nwb
electrophysiologyopenPublished Dandiset metadata and archive endpoints are available through the production DANDI API.
Last verified 2026-04-30Open record

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.

ibl
behavioral-neuroscienceopenPublic sessions can be searched and loaded from the IBL public data server through ONE.
Last verified 2026-04-29Open record

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.

openneuro
neuroscienceopenPublished datasets are available on demand over the internet.
Last verified 2026-04-29Open record

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