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410 results for “APEx”
Data from: Cascading effects of apex predator recovery on rodent foraging activity and seed predation
This dataset was collected to examine the effects of apex predator presence on post-dispersal seed predation and rodent foraging behavior in Mediterranean ecosystems of southern Spain. The study focused on the Iberian lynx (Lynx pardinus) as a top predator capable of altering mesopredator and small mammal communities through cascading interactions. We used the fleshy-fruited tree Pyrus bourgaeana as a model species and conducted a seed predation experiment in two areas with and without lynx presence. A total of 1152 seeds were placed in 144 seed depots across forest and open habitats and three microhabitat types (rock, shrub, and open ground). Rodent activity and foraging behavior were monitored using 36 camera traps installed at a subset of seed depots, and rodent abundance was estimated with live trapping one week later. The dataset includes seed predation counts, camera-trap records of rodent visits, live-trapping results, and vegetation cover estimates. These data allow investigation of how predation risk and habitat structure influence rodent activity and post-dispersal seed predation dynamics in Mediterranean landscapes.
APEX beta greenhouse gas flux data from both the permafrost plateau area and the active thaw margin, from 2017 on
This dataset contains greenhouse gas flux data for the bog and permafrost plateau sites at the Alaskan Peatland Experiment (APEX) from 2017 on. Includes some environmentals, raw gas concentrations, and derived gas flux rates.
Aquatic biofilm autotrohic index, carbon dioxide flux, and environmental conditions for the APEX water table experiment 2021-2023
To better understand linkages between hydrology and ecosystem carbon flux in northern aquatic ecosystems, we evaluated the relationship between plant communities, biofilm development, and carbon dioxide (CO2) exchange following long-term changes in hydrology in an Alaskan fen. We quantified seasonal variation in biofilm composition and CO2 exchange in response to lowered and raised water-table position (relative to a control) during years with varying levels of background dissolved organic carbon (DOC). We then used nutrient-diffusing substrates to evaluate cause-effect relationships between changes in plant subsidies (i.e., leachates) and biofilm composition among water-table treatments. We found that background DOC concentration determined whether plant subsidies promoted net autotrophy or heterotrophy on nutrient diffusing substrates. In conditions where background DOC was <= 40 mg L-1, plant subsidies promoted an autotrophic biofilm. Conversely, when background DOC concentration was >= 50 mg L-1, plant subsidies promoted heterotrophy. Greater light attenuation associated with elevated levels of DOC may have overwhelmed the stimulatory effect of nutrients on autotrophic microbes by constraining photosynthesis while simultaneously allowing heterotrophs to outcompete autotrophs for available nutrients. At the ecosystem level, conditions that favored an autotrophic biofilm resulted in net CO2 uptake among all water-table treatments, whereas the site was a net source of CO2 to the atmosphere in conditions that supported greater heterotrophy. Taken together, these findings show that hydrologic history interacts with changes in dominant plant functional groups to alter biofilm composition, which has consequences for ecosystem CO2 exchange.
Redox-Active Organic Matter Measurements at the APEX fen in the Bonanza Creek Experimental Forest near Fairbanks, Alaska (2021-2022)
This dataset contains measurements collected for the publication "Direct and Indirect Effects of Water Table on Redox-Active Organic Matter Reduction in an Alaskan Rich Fen". This includes redox-active organic matter reduction measurements for three different experiments that took place at the APEX Fen; (1) common substrate in 2021, (2) common substrate in 2022, (3) peat collected from each water-table manipulation plot. Water-table levels are reported for experiments 1 and 2. Carbon greenhouse gas measurements and fluorescence and absorbance data are reported for experiment 2. Carbon greenhouse gas measurements are reported for experiment 3.
Urban material ground truth data for the 2015 APEX hyperspectral image of Brussels
<p>This dataset entails a spectral library file (.sli file with matching .hdr text file) with 1350 georeferenced and labeled spectra derived from the 2m resolution airborne hyperspectral APEX image of Brussels (Belgium) that was acquired during the summer of 2015. The labeled spectra included in this dataset describe level 2A surface reflectance profiles ranging between 450 and 2431 nm. The original APEX image files can be downloaded via the <a href="https://belair.vito.be/en/belair-data" target="_blank" rel="noopener">Belair website</a>, and the preprocessing performed on this image data is explained in Sterckx et al. (2016) and Vreys et al. (2016). See the "Related works" section of this data publication.</p> <p>The main purpose of this dataset is to provide Ground Truth (GT) data for remote sensing-based mapping experiments with a generic urban spectral library, performed in the frame of the GENLIB research project. The content of this dataset hence focuses on the optical reflectance/absorption behaviour of urban surface materials and their variations.</p> <p>The spectra included in this dataset were manually sampled from the above mentioned APEX image and labeled using ancillary reference data (very high-resolution aerial imagery, Google Street View, LiDAR ...), already published urban spectral libraries, terrain knowledge and some field work. The header of the spectral library contains the various labels that were added to these spectra. These labels cover:</p> <ul> <li>EAGLE Land Cover Component (LCC) from the EAGLE matrix version 3.1. Visit the <a href="https://land.copernicus.eu/en/eagle" target="_blank" rel="noopener">website of the EAGLE framework</a> for more information.</li> <li>Material Groups (MG).</li> <li>Artificial Material Types (AMT).</li> <li>Artificial Material Coating or Fabrication (AMCF).</li> <li>Artificial Material Forms (AMF).</li> <li>Latitude (degrees, WGS84).</li> <li>Longitude (degrees, WGS84).</li> </ul> <p>The value domains of these spectrum attributes are described in the look-up table included as a CSV-file in this data publication.</p> <p>While considerable efforts have been made to safeguard the accuracy of these data, they are published as is, without any warranty or support. Use at your own discretion.</p>
APEX beta vegetation surveys from both the permafrost plateau area and the active thaw margin, from 2017 to present
This dataset contains the vegetation survey data for the bog and permafrost plateau sites at the Alaskan Peatland Experiment (APEX) from 2018 to 2024. Each year of surveys is recorded in a separate subsheet.
APEX beta environmentals from both the permafrost plateau area and the active thaw margin, from 2017 to 2019
This dataset contains the environmental data for the bog and permafrost plateau sites at the Alaskan Peatland Experiment (APEX) from 2017 to 2019. Includes summarized flux and vegetation values as well for ease of use in analysis.
APEX fen Raised plot soil temperatures, 2005-Present
Soil temperature measurements were recorded hourly at an array of depths at APEX Fen beginning June 2005. APEX Fen is located in the Bonanza Creek LTER outside of Fairbanks, AK. APEX Fen uses a full-factorial water table (flooded or raised, lowered or drained, and control treatments, as well as a moisture gradient) by warming manipulation (warmed, unwarmed treatment).
APEX fen Lowered plot soil temperatures, 2005-Present
Soil temperature measurements were recorded hourly at an array of depths at APEX Fen beginning June 2005. APEX Fen is located in the Bonanza Creek LTER outside of Fairbanks, AK. APEX Fen uses a full-factorial water table (flooded or raised, lowered or drained, and control treatments, as well as a moisture gradient) by warming manipulation (warmed, unwarmed treatment).
Alaskan Peatland Experiment (APEX): Static chamber methane fluxes from fen sites, 2005-2011 and 2015-2016
Methane fluxes were collected at APEX rich fen during the summers of 2005 - 2011 and 2015-2016. APEX Fen is located in the Bonanza Creek LTER outside of Fairbanks, AK. APEX Fen uses a full-factorial water table (flooded or raised, lowered or drained, and control treatments, as well as a moisture gradient). A warming manipulation (warmed, unwarmed treatment) was in place in 2005-2011, but ceased by 2014. In 2015, vegetation manipulation subplots were installed within the water table treatments.
Water table level data from APEX Fen plots, 2005-2006
Water table level data from a soil climate manipulation experiment in an Alaskan rich fen (APEX). APEX Fen is located in the Bonanza Creek LTER outside of Fairbanks, AK. APEX Fen uses a full-factorial water table (flooded or raised- APEXele, lowered or drained- APEXlow, and control treatments- APEXcon, as well as a moisture gradient) by warming manipulation (warmed, unwarmed treatment). Automated water table measurements were collected in each plot using a pressure transducer and a datalogger.
APEX beta NW site: hourly soil temperature, soil moisture, air temperature and RH, photosynthetically active radiation (PAR), and rain.
This dataset contains hourly averages of air temperature and RH, soil temperature and moisture, PAR, and rain. This basic environmental data supports the other research that is going on at this site.
APEX beta SE site: hourly soil temperature, soil moisture and net radiation.
This dataset contains hourly averages of soil temperature and moisture, and net radiation. This basic environmental data supports the other research that is going on at this site.
APEX beta SW site: hourly soil temperature, and soil moisture.
This dataset contains hourly averages of soil temperature and moisture. This basic environmental data supports the other research that is going on at this site.
APEX gamma black spruce site: hourly soil temperature, soil moisture, air temperature and RH and photosynthetically active radiation (PAR).
This dataset contains hourly averages of air temperature and RH, soil temperature and moisture, and PAR. This basic environmental data supports the other research that is going on at this site.
Alaskan Peatland Experiment (APEX): Static chamber methane fluxes from bog sites, 2008-2011
This dataset includes the static chamber methane fluxes collected from 2008-2011 at the APEX bog site. The bog site includes three types of bogs: a permafrost bog (broken into a control and experimental area), a new collapse site (NW, Nwref, and SW), and an old collapse site (NE and SE). Static chambers are fluxed for methane approximately weekly at the collapse sites and monthly at the permafrost sites. The flux is calculated the linear change in concentration within the chamber over a 30 minute period. The flux is reported as mgCH4/m2/d.
Data from: Do introduced apex predators suppress introduced mesopredators? A multiscale spatiotemporal study of dingoes and feral cats in Australia suggests not
<p>1. The role of apex predators in structuring ecosystems through the suppression of mesopredator activity and abundance is receiving increasing attention, largely due to the potential benefits for biodiversity conservation. In Australia, invasive mesopredators such as feral cats (Felis catus) have been identified as major contributors to Australia's mass mammal extinctions since European arrival. The introduced dingo (Canis familiaris) has been proposed as a novel way to suppress the impacts of feral cats, however scientific evidence of the dingo's suppressive role is equivocal. 2. We used camera traps to investigate whether a large introduced predator (dingo) suppresses the activity of an established introduced mesopredator (feral cat) across a national park site conserving endangered species, and an agricultural site supporting cattle grazing enterprises. 3. Feral cats and dingoes exhibited marked overlap in both temporal and spatial activity, indicating coexistence. Some temporal separation was evident at the agricultural site, however this reflected higher diurnal activity by dingoes, not a responsive shift in cat activity. Cat activity times were unrelated to dingo presence and did not differ between areas occupied by dingoes and dingo-free areas. There was no evidence of dingoes excluding cats from patches at either site, nor was there evidence of within-night fine-scale spatiotemporal avoidance of dingoes by cats. 4. Species co-occurrence models revealed dingoes had no negative effect on the probability of cat presence. The probability of detecting a cat on the national park was significantly higher in areas with dingoes than in dingo-free areas, while on agricultural land, cat detectability did not differ between areas with and without dingoes. Cats remained active, abundant and widespread across both sites, with evidence of cats hunting and breeding successfully in areas occupied by dingoes. 5. Synthesis and applications. Our findings indicate that feral cats can coexist with dingoes, without apparent suppression of cat activity, abundance, or fitness. Proposals to reintroduce or restore dingoes and other large predators to suppress invasive mesopredators and conserve biodiversity should be carefully evaluated on a site-by-site basis, as their ability to suppress cats and protect species of conservation significance will likely be context dependent.</p>
- Wings yellowish with apex blackish and an additional subapical transverse blackish band on fore wing (a); epicnemial carina very short, hardly extending onto mesopleuron (b) ………E. maynei Benoit, 1952 in A review of the Afrotropical Rhyssinae (Hymenoptera: Ichneumonidae) with the descriptions of five new species
- Wings yellowish with apex blackish and an additional subapical transverse blackish band on fore wing (a); epicnemial carina very short, hardly extending onto mesopleuron (b) ………E. maynei Benoit, 1952
- Sternite 1 without a pair of submedian tubercles, tubercles present on sternites 2–4 only (a); general coloration pale to striking yellow with isolated black markings (b) …………………………………7 7. Apex of subtegular ridge concave, laterally flanged (A) ……………………………………………8 - Apex of subtegular ridge convex, without lateral flange (a) ……………………………………9 in A review of the Afrotropical Rhyssinae (Hymenoptera: Ichneumonidae) with the descriptions of five new species
- Sternite 1 without a pair of submedian tubercles, tubercles present on sternites 2–4 only (a); general coloration pale to striking yellow with isolated black markings (b) …………………………………7 7. Apex of subtegular ridge concave, laterally flanged (A) ……………………………………………8 - Apex of subtegular ridge convex, without lateral flange (a) ……………………………………9
Text-fig. 5. SRXTM images of Miranthus elegans gen. et sp. nov.; Mira locality, Portugal. a, b: Transverse sections of flower (a, orthoslice xy0665 close to the apex of placenta; b, orthoslice xy0800 in middle part of placenta) showing remains of calyx with distinct bundles (arrows), ovary wall (ow) and numerous ovules (ov) on the central mushroom-shaped globose placenta (pl) with central column (cc). c: Transverse section of flower (orthoslice xy0620) through perianth and ovary (ow) at a level above the placenta showing ovules (ov) and cellular preservation of the sepal bundles (arrows shown for one sepal); note abaxial surface of sepals with thick-walled epidermal cells, thick cuticle, and fine pointed verrucae. d: Longitudinal section of flower (orthoslice xz0500) showing perigynous position of calyx and semi-inferior ovary (ow, ovary wall) with a central placenta (pl), central column (cc) and numerous ovules (ov); note spiny verrucae on abaxial surface of calyx lobes. Specimens, Mira 100-S153145 (a, b), Mira 100-S170155 (c, d, holotype). Scale bars = 600 µm (a–d). in Early Flowers Of Primuloid Ericales From The Late Cretaceous Of Portugal And Their Ecological And Phytogeographic Implications
Text-fig. 5. SRXTM images of Miranthus elegans gen. et sp. nov.; Mira locality, Portugal. a, b: Transverse sections of flower (a, orthoslice xy0665 close to the apex of placenta; b, orthoslice xy0800 in middle part of placenta) showing remains of calyx with distinct bundles (arrows), ovary wall (ow) and numerous ovules (ov) on the central mushroom-shaped globose placenta (pl) with central column (cc). c: Transverse section of flower (orthoslice xy0620) through perianth and ovary (ow) at a level above the placenta showing ovules (ov) and cellular preservation of the sepal bundles (arrows shown for one sepal); note abaxial surface of sepals with thick-walled epidermal cells, thick cuticle, and fine pointed verrucae. d: Longitudinal section of flower (orthoslice xz0500) showing perigynous position of calyx and semi-inferior ovary (ow, ovary wall) with a central placenta (pl), central column (cc) and numerous ovules (ov); note spiny verrucae on abaxial surface of calyx lobes. Specimens, Mira 100-S153145 (a, b), Mira 100-S170155 (c, d, holotype). Scale bars = 600 µm (a–d).
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Allen Brain Atlas
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DANDI Archive for NWB datasets
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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.