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198 results for “field survey”
A multi-resolution, multi-epoch low Radio Frequency Survey of the Kepler K2 Mission Campaign 1 Field
<p>Data abstract:</p> <p>Contained within are the MWA images used as input data for this study. The production and analysis of these images are described in the linked paper. The final catalogues and light curves are available from VizieR (http://vizier.cfa.harvard.edu/viz-bin/VizieR?-source=J/AJ/152/82).</p> <p>Paper abstract:</p> <p>We present the first dedicated radio continuum survey of a Kepler K2 mission field, Field 1, covering the North Galactic Cap. The survey is wide field, contemporaneous, multi-epoch, and multi-resolution in nature and was conducted at low radio frequencies between 140 and 200 MHz. The multi-epoch and ultra wide field (but relatively low resolution) part of the survey was provided by 15 nights of observation using the Murchison Widefield Array (MWA) over a period of approximately a month, contemporaneous with K2 observations of the field. The multi-resolution aspect of the survey was provided by the low resolution (4‧) MWA imaging, complemented by non-contemporaneous but much higher resolution (20″) observations using the Giant Metrewave Radio Telescope (GMRT). The survey is, therefore, sensitive to the details of radio structures across a wide range of angular scales. Consistent with other recent low radio frequency surveys, no significant radio transients or variables were detected in the survey. The resulting source catalogs consist of 1085 and 1468 detections in the two MWA observation bands (centered at 154 and 185 MHz, respectively) and 7445 detections in the GMRT observation band (centered at 148 MHz), over 314 square degrees. The survey is presented as a significant resource for multi-wavelength investigations of the more than 21,000 target objects in the K2 field. We briefly examine our survey data against K2 target lists for dwarf star types (stellar types M and L) that have been known to produce radio flares.</p>
Weed surveys in Oilseed rape fields in the LTSER Zone Atelier Plaine & Val de Sèvre
<p>Dataset used in Berquer, A.; Martin, O.; Gaba, S. Landscape Is the Main Driver of Weed Assemblages in Field Margins but Is Outperformed by Crop Competition in Field Cores. Plants 2021, 10, 2131. https://doi.org/10.3390/plants10102131</p> <p>Because there personnal and sensitive data, agricultural practices data are not given. Please contact Sabrina Gaba or Vincent Bretagnolle if you are interested in a collaborative project.</p>
Field survey and long-term measurements of biological, geomorphic, and hydrologic properties across ecosystem states in a non-tidal, salinizing peat marsh in Everglades National Park, Florida, USA, June 2018 - ongoing
This dataset package details a field survey and long-term measurements of biological, geomorphic, and hydrologic properties across ecosystem states found within a salinizing, non-tidal peat marsh in the coastal Everglades. There are four datasets included: FCE1250_Lamb_AltStableState_HydroGeo includes point measurements of soil surface elevation, bedrock elevation, soil depth, water depth, and porewater salinity across ecosystem states: emergent marsh (sawgrass dominated), submerged marsh (submerged aquatic vegetation), and unvegetated open water. The survey was conducted between November 2019 to January 2020. FCE1250_Lamb_AltStableState_Bio contains plot-scale (1 m^2) biological measurements from emergent marsh (sawgrass). Biological measurements (total sawgrass, average individual sawgrass biomass, and total sawgrass aboveground biomass), are inherently plot-level but geomorphic and hydrologic measurements were averaged (n = 3) for each plot. Standard deviations are provided. FCE1250_Lamb_AltStableState_Bio_LongTerm contains biological plot-scale (1 m^2) measurements at a bi-monthly timestep from Nov 2019 - July 2022 from a subset of plots (n = 9) included in the FCE_1250_Lamb_AltStableState_Bio dataset. Each bi-monthly measurement is the average value across all 9 nine plots. Standard deviations are also included. FCE_1250_Lamb_AltStableState_SETMH contains long-term measurements of soil surface elevation change and vertical accretion from surface elevation change and marker horizon plots from June 2018 - May 2023. Average and standard errors across all plots are included as well as measurements from each plot. Also included is the cumulative number of dry days based on the average soil surface elevation for all plots. Data collection for all datasets is complete, except for FCE_1250_Lamb_AltStableState_SETMH. SET-MH measurements are still ongoing.
Field survey of mangrove regeneration, porewater variables, and light in mangrove forests in Everglades National Park, Florida, USA, July 2020 - August 2022
This dataset package encompasses measurements from field surveys of mangrove regeneration, porewater variables, and light conditions across six mangrove sites in the coastal Everglades. The goal of this project was to quantify mangrove regeneration of seedlings and saplings in mid- and downstream locations within three estuaries in Everglades National Park, Florida, USA. We assessed the effects of porewater variables and light conditions on the observed regeneration patterns. The package includes seven datasets: FCE1268_Porewater: Contains measurements of porewater salinity, sulfide, ammonia, nitrite, orthophosphate, and nitrate at a 30 cm depth. Porewater surveys were conducted biannually from 09-10-2020 to 05-17-2022. See also similar porewater data for Florida Coastal Everglades (FCE) long-term sites in data packages knb-lter-fce.1169 and knb-lter-fce.1171, which contain data for SRS-5 and SRS-6, available in the FCE LTER website's data catalog or the EDI repository. FCE1268_Foliar_Nutrient_Content dataset, collected in August 2022, includes measurements of foliar nutrient content (total carbon, total nitrogen, and total phosphorus) for three mangrove species (A. germinans, L. racemosa, R. mangle) of two life stages—seedlings (height < 1 m) and saplings (height ≥ 1 m and Diameter at Breast Height (DBH) < 2.5 cm). FCE1268_Light contains light intensity (foot-candle) measurements taken at 1-hour intervals from 09-18-2020 to 08-29-2022 at mangrove sites and converted photosynthetic active radiation values from an outdoor mesocosm experiment. FCE1268_Sapling_Density provides biannual count measurements of individuals at the sapling plot level (4 m^-2) within each site from 07-09-2020 to 08-29-2022. FCE1268_Seedling_Density contains biannual count measurements of individuals at the seedling plot level (m^-2) within each site from 07-07-2020 to 08-29-2022. FCE1268_Sapling_Regeneration contains height, crown area, and stem elongation measurements of tagged sapling indiv
FIG. 9 in Overview of Mitaraka survey: research frame, study site and field protocols
FIG. 9. — Sample size and sorting process according to the sampling type and impact on the quantity and availability of specimens for taxonomic study. Process for broad-spectrum traps: A, automatic light trap with blue LED; B, yield of the trap after one week; C, conditioning of the sample in the field laboratory, and storage in WhirlPack bags with alcohol; D-F, sorting specimens by order and family at the SEAG laboratory (Montjoly, French Guiana); G, preparing packages with glassine envelopes and Eppendorf vials for dissemination among coordinators and/or taxonomic experts; H, typical output of this kind of broad-spectrum trap samples: about 50% fraction may finally be studied (arbitrary estimate). Photos: Julien Touroult.
FIG. 10 in Overview of Mitaraka survey: research frame, study site and field protocols
FIG. 10. — Process for active collecting: A, active collection of cricket (Orthoptera); B, photography of live specimens, important part of the process in some groups; C, preparation and management of the specimens for short term storage in the field laboratory; D, output of the active or selective methods: lower yields than broad-spectrum traps but a larger proportion is effectively studied. Photos: A, C, Xavier Desmier; B, Julien Touroult.
FIG. 12 in Overview of Mitaraka survey: research frame, study site and field protocols
FIG. 12. —Database and portals for entry, consultation and access to data, illustrated by means of a newly described Mitaraka species, Eupromera pascali Dalens, 2016 (Coleoptera, Cerambycidae): A, CardObs database entry interface (https://cardobs.mnhn.fr). The morphospecies name was initially entered as "Eupromera n. sp." in April 2015 and after publication (Feb. 2016), the morphospecies name was replaced by the species name, and the record was completed with publication reference and the collection deposit number; B, INPN French Natural Heritage consultation portal, displaying this species from the Mitaraka dataset (https://inpn.mnhn.fr/espece/cd_nom/814643/tab/rep/GUF); C, public interface to database of the Coleoptera collection (EC) of the MNHN illustrating the holotype and its labels, with full traceability (http://coldb.mnhn.fr/catalognumber/mnhn/ ec/ec7591); D, International GBIF Data Portal displaying the Coleoptera collection (EC) dataset of the MNHN (https://www.gbif.org/occurrence/1413051340).
FIG. 8 in Overview of Mitaraka survey: research frame, study site and field protocols
FIG. 8. — Active and passive substrate sampling: A, B, collection of dead branches infested with saproxylic larvae for "rearing" in emergence chambers (EXL); C, sampling soil litter for invertebrates with Winkler sieve (WS); D, spraying trunks with insecticide to collect small bark-dwelling arthropods that fall on the white sheet at the bottom of the trunk; E, searching for Annelida in soil samples collected with a spade; F, fish sampling in a small stream using rotenone. Photos: A, B, Stéphane Brûlé; C, Benoît Fontaine; D, Jürgen Schmidl; E, F, Xavier Desmier.
FIG. 7 in Overview of Mitaraka survey: research frame, study site and field protocols
FIG. 7. — Active collecting techniques: A, collecting butterflies with a net; B, sweeping vegetation (NS or SW) with a rugged sweep net; C, beating tray (BS), the vegetation is hit with a stick, which causes the arthropods to fall on the white nape mounted on a frame; D, searching for aquatic larvae with a rugged aquatic net; E, looking for butterfly caterpillars (Riodinidae and Lycaenidae) on liana flowers; F, visual search for reptiles, here with a Lachesis muta (Linnaeus, 1766) snake. Photos: A, B, C, E, Stéphane Brûlé; D, Nicolas Moulin; F, Xavier Desmier.
FIG. 3 in Overview of Mitaraka survey: research frame, study site and field protocols
FIG. 3. — Illustration of the landscape and main habitat types found in the Mitaraka study area: A, general landscape of the study area, with the drop zone visible in the foreground; B, inselberg "Sommet-en-Cloche" with bare rocks and transition forest; C, mosaic of forests and cambrouses; D, forest interior; E, swamp forest (bas-fond) with Euterpe oleracea Mart palm. Photos: Xavier Desmier, except B, Stéphane Brûlé.
FIG. 5 in Overview of Mitaraka survey: research frame, study site and field protocols
FIG. 5. — Passive interception traps: A, windowpane flight intercept trap (FIT) suspended over a fallen tree crown; B, 6 meter Malaise trap (MT) set up over a fallen tree near the Alama river; C, SLAM traps on an inselberg forest edge; D, a buprestid beetle (Buprestidae) trapped in artificial spider web (ASW). Photos: A, B, D, Julien Touroult; C, Stéphane Brûlé.
FIG. 4 in Overview of Mitaraka survey: research frame, study site and field protocols
FIG. 4. — Some of the collecting sites and techniques: A, drop zone forest clearing, with a high amount a freshly cut trees, and scattered SLAM traps; B, clearing, equiped with SLAM traps, automatic light trap and artificial spider web (ASW); C, active net collecting of butterflies on the "Sommet-en-Cloche" inselberg. Photos: A, B, Julien Touroult, C, Stéphane Brûlé.
FIG. 2 in Overview of Mitaraka survey: research frame, study site and field protocols
FIG. 2. — Mitaraka study area map with the four trails indicated (map by Maël Dewynter, map base by IGN and Parc amazonien de Guyane).
FIG. 6 in Overview of Mitaraka survey: research frame, study site and field protocols
FIG. 6. — Attractive traps: A, pink LED based automatic light trap (PVP) suspended at 15 m height close to a small canopy gap; B, light trap (LT) with light bulb of 125W and with white sheet, covered with moths at the end of a rainy night; C, colored pan traps (blue [BPT], white [WPT], and yellow [YPT]) at soil surface level to collect Diptera; D, fruit baited Coleoptera traps with banana nectar (BT), suspended in forest canopy; E, Nymphalidae butterfly trap (CHX), suspended in the forest canopy; F, tree equiped with ropes and baits composed of honey and tuna at different heights to attract ants; G, pitfall trap baited with dung (PFC) to collect coprophagous Scarabaeidae; H, Big Shot, a type of slingshot used to shoot ropes and suspend traps high up in the trees. Photos: A, B, G, H, Julien Touroult; C, Marc Pollet; F, Maurice Leponce; D, E, Stéphane Brûlé.
FIG. 11 in Overview of Mitaraka survey: research frame, study site and field protocols
FIG. 11. — Process flow for Diptera: A, each Diptera coordinator and taxonomic expert signs an agreement prior to receiving samples; B, sampling specimens with an array of methods (Malaise trap, pan traps, sweep net, SLAM trap); C, transporting of partly processed and unprocessed samples to the Belgian lab; D, sorting Diptera from complete samples and splitting the Diptera fraction into workable fractions (mostly on family level) for Diptera coordinators – taxonomic experts; E, processed Diptera fractions (Dolichopodidae, Empidoidea, Mycetophilidae, Phoridae); F, dissemination of workable fractions to Diptera coordinators – taxonomic specialists (10 in Europe, 5 in Canada, 8 in the USA, 10 in Brazil); G, examination and identification of specimens of workable fractions by the taxonomic expert (or further splitting of fractions by Diptera coordinator); H, commitments as part of the signed agreement (see Fig. 11A), with submission of identification file as first.
FIGURE 1 in Developing a database of Australian grasshopper occurrences from historic field survey notebooks spanning 54 years (Orthoptera: Acrididae, Morabidae, Pyrgomorphidae, Tetrigidae)
FIGURE 1 First page of field notebook number 156. This trip was conducted from Port Augusta to Norseman, Western Australia, by Ken Key, Murray S Upton and Jim Balderson from 28/9/1963 to 23/10/1963. Plant specimens were identified by Nancy T Burbidge. On 28th of September, they started from Mildura, took Arumpo road at a vehicle odometer 6827 and travelled 6 mi to reach 6833. Site description and general observations for collection at stop 6833: Flat with sparse belah and Callitris robusta to 25 ft on pale brown sandy loam with?Cassia sp. abundant to 8 ft and regrowth. Ground layer of Bassia spp. and Kochia spp. to 6 in. and occasional Kochia?pyramidata to 2 ft barley grass and succulents drying off, considerable bare ground. Return. Grasshoppers collected at this site: Cratilopus sp. 1, Chortoicetes terminifera, Caperrala sp. 1 (j.), Apotropis vittata (j.).
FIGURE 4 in Developing a database of Australian grasshopper occurrences from historic field survey notebooks spanning 54 years (Orthoptera: Acrididae, Morabidae, Pyrgomorphidae, Tetrigidae)
FIGURE 4 Comparison of survey consistency among different surveyors. (a) Between-site distance maintained by different lead surveyors. (b) The total number of grasshoppers recorded per site by different lead surveyors. Numbers in the middle of boxplot show median value. (c) Seasonal variation in the number of species counted per site by different lead surveyors. (d) Proportion of total surveys conducted in each season by different surveyors. Values on pie charts show the number of surveys conducted by each surveyor. Seasons are indicated by colours.
FIGURE 3 in Developing a database of Australian grasshopper occurrences from historic field survey notebooks spanning 54 years (Orthoptera: Acrididae, Morabidae, Pyrgomorphidae, Tetrigidae)
FIGURE 3 Spatial bias in historic grasshopper surveys in Western Australia and Tasmania (inset). (a) Thiessen polygon network drawn based on survey sites as centre of each polygon, showing the intensity of survey activity; the smaller polygons, the more intensive the survey activity because each polygon represents a sampling site. Colours in the background represent bioregions. (b) Bioregions bias: Positive scores indicate positive survey bias (higher survey effort than expected from a random allocation) and vice versa. Bars on right side of vertical dash line represent Tasmania. Bioregions were abbreviated as: AvWh, Avon Wheatbelt; BL, Ben Lomond; Ca, Carnarvon; CeKi, Central Kimberley; CeRa, Central Ranges; Co, Coolgardie; Da, Dampierland; EsPl, Esperance plains; F, Furneaux; Ga, Gascoyne; GeSa, Geraldton Sandplains; GiDe, Gibson Desert; GrSaDe, Great Sandy Desert; GrViDe, Great Victorian Desert; Ha, Hampton; JaFo, Jarrah Forest; K, King; LiSaDe, Little Sandy Desert; Ma, Mallee; Mu, Murchison; NoKi, Northern Kimberley; Nu, Nullarbor; OrViPl, Ord Victoria Plain; Pi, Pilbara; SwCoPl, Southwest Coastal Plain; Ta, Tanami; TCH, Tasmanian Central Highlands; TNM, Tasmanian Northern Midlands; TNS, Tasmanian Northern Slopes; TSE, Tasmanian South East; TSR, Tasmanian Southern Ranges; TW, Tasmanian West; ViBo, Victorian Bonaparte; Wa, Warren; Ya, Yalgoo.
FIGURE 2 in Developing a database of Australian grasshopper occurrences from historic field survey notebooks spanning 54 years (Orthoptera: Acrididae, Morabidae, Pyrgomorphidae, Tetrigidae)
FIGURE 2 Grasshopper species count and survey effort in Western Australia and Tasmania (inset) per 50-km grid cells. Only records with both genus and species (either confirmed based on formal taxonomy for genus and species or putative taxonomy used for genus or species) names were included in these analyses. (a) Species richness (total number of recorded species per cell); (b) total number of survey sites per cell; (c) for each cell, the average number of species per survey site. No survey was conducted in white cells. Bioregions were abbreviated as: Ca, Carnarvon; CeKi, Central Kimberley; Co, Coolgardie; Da, Dampierland; EsPl, Esperance Plains; Ga, Gascoyne; Ha, Hampton; Nu, Nullarbor; Pi, Pilbara; SwCoPl, Southwest Coastal Plains; ViBo, Victorian Bonaparte.
Dataset for "Detailed cartography of Cotopaxi's 1877 primary lahar deposits obtained by drone-imagery and field surveys in the proximal northern drainage"
<p>Contains the following datasets supporting the results in "Detailed cartography of Cotopaxi’s 1877 primary lahar deposits obtained by drone-imagery and field surveys in the proximal northern drainage": 1) Drone-NDVI 25cm/pixel imagery for the four surveyed plains. 2) Geospatial vector layer for the geological fieldwork control points. 3) Geospatial vector layer for the 1877 deposit contact lines. 4) Geospatial vector layer for the 1877 deposit polygons.</p>
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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.
Annotated Behaviour and Observability Dataset (ABODe)
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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.