Find research datasets worth reusing
Search datasets from major research repositories and use ShareScore to quickly assess how well each record supports discovery, access, and reuse.
1,200
datasets available to search
ShareScore release 0.9.0
Dataset results
1,200 results for “Sierra”
HeadwaterstreamSNevada: data on riparian vegetation and water parameters of headwater streams in Sierra Nevada, Spain
<p>Providing historical data on riparian plant biodiversity and physico-chemical parameters of stream water in Mediterranean mountains helps to assess the effects of climate change and other human stressors on these sensitive and critical ecosystems. This database collects data from the main natural headwater streams of the Sierra Nevada (southeastern Spain), a high mountain (up to 3,479 meters above sea level, m.a.s.l.) recognized as a biodiversity super hotspot (Arroyo et al., 2022) in the Mediterranean Basin. On this mountain, rivers and landscapes depend on snowmelt water, representing an excellent scenario for evaluating global change's impacts. This dataset covers first- to third-order headwater streams at 41 sites from 832 to 1,997 m.a.s.l., collected from December 2006 to July 2007. Our goal is to supply information on the vegetation associated with streambanks, the essential physico-chemical parameters of stream water, and the physiographic features of the subwatersheds. Riparian vegetation data correspond to six plots sampled at each site, including total canopy, individual number, height and DBH (diameter at breast height) in woody species, and cover percentage for herbs. Physico-chemical parameters were measured in situ (electric conductivity, pH, dissolved O2 concentration, stream discharge) and determined in the laboratory [alkalinity, soluble reactive phosphate-phosphorus (SRP), total phosphorus (TP), nitrate-nitrogen (NO3-–N), ammonium-nitrogen (NH4+–N), total nitrogen (TN)]. Watershed physiographic variables comprise drainage area, minimum altitude, maximum altitude, mean slope, orientation, stream order, stream length, and land cover surface percentage. We recorded 197 plant taxa (67 species, 28 subspecies and 2 hybrids), representing 8.4% of the Sierra Nevada vascular flora. Due to the botanical nomenclature used, the database can be linked to FloraSNevada database (Lorite et al., 2020), contributing to Sierra Nevada (Spain) as a laboratory of global processes.</p> <p>For more information about the data, see the metadata document (Metadata_HeadwaterstreamSNevada.docx).</p>
Characterizing ground and surface fuels across Sierra Nevada forests shortly after the 2012–2016 drought
<p>These files include the main processed data and R script used in the analysis for the publication <strong>Characterizing ground and surface fuels across Sierra Nevada forests </strong><strong>shortly after the 2012</strong>–<strong>2016 drought </strong>accepted in the journal Forest Ecology and Management.</p> <p><strong>Abtract</strong></p> <p>The 2012–2016 hotter drought in the Sierra Nevada, California, USA led to the mortality of millions of trees. This disruption to the disturbance regime is an example of how climate extremes can exacerbate current and future wildfire risks. In this study, we used data from an extensive network of forest plots across 13 different sites in the Sierra Nevada to characterize ground (i.e., duff) and surface fuels and their potential drivers shortly after the drought (2016–2018), but before snag (standing dead tree) fall associated with this massive tree mortality event occurred. Overall, we found high biomass of fuels for most sites (138.2 ± 21.7 Mg ha-1, Mean ± 95% CI), especially in areas lacking recent fire or active management, with values up to five times higher than estimates for pre-settlement conditions for mixed-conifer forests in the region. Four major groups of forest overstory structure were identified with some distinct fuel characteristics. These ranged from a cluster of ponderosa pine (Pinus ponderosa Douglas ex Lawson)-dominated plots with the highest density of snags, lowest live tree basal area, and lowest total ground and surface fuel biomass (mean = 90.1 Mg ha-1) to a group of giant sequoia (Sequoiadendron giganteum (Lindl.) J. Buchholz)-dominated plots with the highest live tree basal area and highest total fuel biomass (mean = 547.6 Mg ha-1). Although we found relatively weak relationships between forest characteristics and fuel loads, their inclusion in a model selection framework that also considered biophysical variables and disturbance history explained more than 80% of the observed variation in litter + fine woody debris loads. The baseline fuel conditions described here will not only inform the management of drought-impacted forests in the Sierra Nevada, but also help identify key drivers of fuel succession in a changing environment. </p>
Supplementary Material for Sarquis & Sierra 2023
<p>This repository includes the Supplementary Material for the publication "Information content in time series of litter decomposition studies and the transit time of litter in aridlands" by Sarquis and Sierra (Biogeosciences).</p>
Fig. 4 in A taxonomic review of the endemic Mexican genus Ceratotrupes Jekel, 1865 (Coleoptera: Geotrupidae: Ceratotrupini), with the description of an unexpected new species from the Sierra Madre del Sur
Fig. 4. Ceratotrupes gonzaloi sp. nov. (CMNC). A–B. Dorsal habitus of male (A) and female (B). C. Details of head and prothorax; arrows indicate posteromedial edge of pronotum without margin. D. Details of cephalic horn and pronotal projection of male. E. Aedeagus in dorsal view. F. Parameres in dorsal view; arrows indicate main differences between C. gonzaloi sp. nov. and C. sturmi. G. Right paramere in lateral view; arrow indicates absence of lobe beneath apical spur.H. Tergite.I. Pleurotergites. J. Phallobase in ventral view; arrow indicates straight margin of ventral lobe. K. Phallobase in dorsal view. L. Phallobase in lateral view; arrow indicates the short bifurcation. M. Internal sac (is) and median struts (ms) in dorsal view. N. Internal sac and median struts in lateral view.
Fig. 2 in A taxonomic review of the endemic Mexican genus Ceratotrupes Jekel, 1865 (Coleoptera: Geotrupidae: Ceratotrupini), with the description of an unexpected new species from the Sierra Madre del Sur
Fig. 2. Ceratotrupes bolivari Halffter & Martínez, 1962 (CMNC). A–B. Dorsal habitus of male (A) and female (B). C. Detail of the elliptical groove of the last antennal lamella. D–E. Aedeagus in dorsal (D) and lateral view (E).
"The sound comes from a meadow in the Sierra Nevada Mountains in California. The meadow is at an elevation of 2400 meters near a mountain named Olancha Peak, which is 3700 meters in altitude. Ihave a group of friends with which Ibackpack (trek) into the mountains. Our goal was to spend some time in the mountains and hike to the top of Olancha Peak (…) By the time we reached the meadow, we were in a forest and there was still snow on the ground in some places. We took the trip in June of 2006. The Sierra Nevada Mountains are a large mountain range. Much of the range is protected by national parks or preserved areas we call 'wilderness areas' (…) Ihave been backpacking for nearly 40 years and Iwill hopefully continue with this challenging activity for 40 years more! Many of my friends are much younger than Iam and it gives me much satisfaction to be able to have as much or more stamina for this activity than they have! When we are on these trips, we hike up peaks, catch fish, drink some whiskey around campfires and enjoy our time in the beautiful solitude. My memories of this trip were of the steep, hot hike from the desert to the cool meadow; the overall beauty of the nature, the absolute solitude of our campsite near the meadow; the strenuous hike to the top of Olancha Peak; the camaraderie of my friends; and, of course the sound of the frogs in the meadow. The frog sounds were astounding to me and Iwould listen in awe of the creature's instinctual desire to reproduce and continue the existence of their kind. Surely there were different species in the meadow for some of the frog sounds were different than others. The sounds only occurred after the Sun went down for the evening. Istood next to the creek in the meadow and recorded the sounds using my digital camera." [Peter/plentz1960]16 in Collecting Sounds. Online Sharing of Field Recordings as Cultural Practice
"The sound comes from a meadow in the Sierra Nevada Mountains in California. The meadow is at an elevation of 2400 meters near a mountain named Olancha Peak, which is 3700 meters in altitude. Ihave a group of friends with which Ibackpack (trek) into the mountains. Our goal was to spend some time in the mountains and hike to the top of Olancha Peak (…) By the time we reached the meadow, we were in a forest and there was still snow on the ground in some places. We took the trip in June of 2006. The Sierra Nevada Mountains are a large mountain range. Much of the range is protected by national parks or preserved areas we call 'wilderness areas' (…) Ihave been backpacking for nearly 40 years and Iwill hopefully continue with this challenging activity for 40 years more! Many of my friends are much younger than Iam and it gives me much satisfaction to be able to have as much or more stamina for this activity than they have! When we are on these trips, we hike up peaks, catch fish, drink some whiskey around campfires and enjoy our time in the beautiful solitude. My memories of this trip were of the steep, hot hike from the desert to the cool meadow; the overall beauty of the nature, the absolute solitude of our campsite near the meadow; the strenuous hike to the top of Olancha Peak; the camaraderie of my friends; and, of course the sound of the frogs in the meadow. The frog sounds were astounding to me and Iwould listen in awe of the creature's instinctual desire to reproduce and continue the existence of their kind. Surely there were different species in the meadow for some of the frog sounds were different than others. The sounds only occurred after the Sun went down for the evening. Istood next to the creek in the meadow and recorded the sounds using my digital camera." [Peter/plentz1960]16
Fire is associated with positive shifts in bumble bee (Bombus vosnesenskii) body size and bee abundance in the Southern Sierra Nevada Mountains
Open the record for dataset details and reuse information.
Rana sierrae annotated aquatic soundscapes (2022)
Open the record for dataset details and reuse information.
Forest restoration and fuels reduction work: Different pathways for achieving success in the Sierra Nevada
Open the record for dataset details and reuse information.
FATES projections of forest structure and composition (1830-2098) at a mixed conifer site in the southern Sierra Nevada
Open the record for dataset details and reuse information.
Southern Sierra Critical Zone Observatory (SSCZO), Providence Creek meteorological data, soil moisture and temperature, snow depth and air temperature
Open the record for dataset details and reuse information.
Sierra Ladrones Study Basin (SLSB) Sediment Micro Climate Research in Watersheds at the Sevilleta National Wildlife Refuge, New Mexico (1992-1995)
To support the hydrology studies in the Sierra Ladrones Study Basin, a network of moisture potential sensors and temperature sensors wereinstalled in the stream-channel sediments and adjacent soils atvarious locations up thru the watersheds in 1992. Two rain gaugeswere also added up through the watershed gradient to complement therain gauge on the weather station (Met43) at the base of the watershedto provide a better measure of moisture inputs to these watersheds.This file contains data for 1992 to 1994.
FIGURE 9 —Isolated chevron NMMNH P - 10 1 3. l in Tyrannosaurus rex from the McRae Formation (Lancian, Upper Cretaceous), Elephant Butte Resevoir, Sierra County, New Mexico
FIGURE 9 —Isolated chevron NMMNH P - 10 1 3. l Bar scale = 10 cm.
Data from: Sierra Nevada mountain lake microbial communities are structured by temperature, resources, and geographic location
<p><span>Warming, eutrophication (nutrient fertilization) and brownification (increased loading of allochthonous organic matter) are three global trends impacting lake ecosystems. However, the independent and synergistic effects of resource addition and warming on autotrophic and heterotrophic microorganisms are largely unknown. In this study, we investigate the independent and interactive effects of temperature, dissolved organic carbon (DOC, both allochthonous and autochthonous), and nitrogen (N) supply, in addition to the effect of spatial variables, on the composition, richness, and evenness of prokaryotic and eukaryotic microbial communities in lakes across elevation and N deposition gradients in the Sierra Nevada mountains of California, USA. We found that both prokaryotic and eukaryotic communities are structured by temperature, terrestrial (allochthonous) DOC and latitude. Prokaryotic communities are also influenced by total and aquatic (autochthonous) DOC, while eukaryotic communities are also structured by nitrate. Additionally, increasing N availability was associated with reduced richness of prokaryotic communities, and both lower richness and evenness of eukaryotes. We did not detect any synergistic or antagonistic effects as there were no interactions among temperature and resource variables. Together, our results suggest that (a) organic and inorganic resources, temperature, and geographic location (based on latitude and longitude) independently influence lake microbial communities; and (b) increasing N supply due to atmospheric N deposition may reduce richness of both prokaryotic and eukaryotic microbes, likely by reducing niche dimensionality. Our study provides insight into abiotic processes structuring microbial communities across environmental gradients and their potential roles in material and energy fluxes within and between ecosystems.</span></p>
Sierra Leone
[Sierra Leone](https://en.wikipedia.org/wiki/Sierra_Leone) is a country on the southwest coast of West Africa. It is bordered by Liberia to the southeast and Guinea surrounds the northern half of the nation. Sierra Leone has a tropical climate with a diverse environment ranging from savanna to rainforests, a total area of 71,740 km2 (27,699 sq mi) and a population of 7,092,113 as of the 2015 census.The capital and largest city is Freetown. The country is divided into five administrative regions which are subdivided into sixteen districts. Sierra Leone is a constitutional republic with a unicameral parliament and a directly elected president serving a five-year term with a maximum of two terms. Muslims make up about three-quarters of the population, though with an influential Christian minority. Religious tolerance in the West African nation is very high and is generally considered a norm and part of Sierra Leone's cultural identity. Source: Objaverse 1.0 / Sketchfab
2014 - 2017, Sierra Leone Ebola epidemic data and knowledge
Information about the 2014 - 2017, Sierra Leone Ebola epidemic curated from multiple publications and reports. The information is represented in machine-interpretable Apollo-XSD format. The terminology is defined by the Apollo-SV ontology and standard identifiers.
BBN designed to develop future land-use scenarios for the Sierra Nevada under different environmental and management conditions
<p>Land-use change (deforestation for crops and pastures, reforestation, firewood removal, etc.) constitutes one of the primary drivers of global change, since human activity is to a greater or lesser degree altering the vegetation cover of the planet. The combined effects of climate change and shifts in land use determine the distribution and structure of the vegetation of the Sierra Nevada, and the associated ecosystem services. The surface cover of tree formations in Sierra Nevada has expanded from 15% to 51.23% over the last 60 years. Similarly, a densification of the scattered tree cover and the natural forests and a decline in the surface area occupied by cultivated fields (from 17.8% to 4.72%) has occurred in the last six decades (Zamora, et al, 2016). Therefore, it is important to ascertain future land use change and its effects on the vegetation cover. </p><p>The main purpose of this model is to facilitate the land-use management of Protected Areas (PAs) based on ecosystem services (ES). A BBN is being designed to develop future land-use scenarios for the Sierra Nevada under different environmental and management conditions. Afterwards, we will implement these scenarios in other ES assessment models. The analysis of ES trade-offs in several scenarios will help managers to predict the state of ES and their relations in the future.</p>
Sierra Weber Model Sword
Hello, this is my model sword for my new unit. I modeled it off of a reference image provided by my teacher. I'm pretty proud of my results and what I demonstrated (bridging, adding edges, etc.). I hope you guys enjoy it!! Source: Objaverse 1.0 / Sketchfab
Data from: Abundance models of endemic birds of the Sierra Nevada de Santa Marta, northern South America, suggest small population sizes and dependence on montane elevations
<p>Abundance measures are almost non-existent for several bird species threatened with extinction, particularly range-restricted Neotropical taxa, for which estimating population sizes can be challenging. Here we use data collected over nine years to explore the abundance of 11 endemic birds from the Sierra Nevada de Santa Marta (SNSM), one of Earth's most irreplaceable ecosystems. We established 99 transects in the "Cuchilla de San Lorenzo" Important Bird Area within native forest, early successional vegetation, and areas of transformed vegetation by human activities. A total of 763 bird counts were carried out covering the entire elevation range in the study area (~175–2650 m). We applied hierarchical distance-sampling models to assess elevation- and habitat-related variation in local abundance and obtain values of population density and total and effective population size. Most species were more abundant in the montane elevational range (1800–2650 m). Habitat-related differences in abundance were only detected for five species, which were more numerous in either early succession, secondary forest, or transformed areas. Inferences of effective population size indicated that at least four endemics likely maintain populations no larger than 15,000–20,000 mature individuals. Estimates of species' area of occupancy and effective population size were lower than most values previously described, a possible consequence of increasing anthropogenic threats. At least four of the endemics exceeded criteria for threatened species listing and a thorough evaluation of their extinction risk should be conducted. Population strongholds for most of the study species were located on the northern and western slopes of the SNSM between 1500–2700 m. We highlight the urgent need for facilitating effective protection of native vegetation in premontane and montane ecosystems to safeguard critical habitats for the SNSM's endemic avifauna. Follow-up studies collecting abundance data across the SNSM are needed to obtain precise range-wide density estimations for all species.</p>
Assessment of Self-Medication Practices and Safety Profile of Medicines Utilisation among Pregnant Women attending Antenatal Clinics in Freetown, Sierra Leone: A Multicentre Cross-Sectional Descriptive Study
<p><strong><span>Background: </span></strong><span>Despite the potential fetal and maternal risks of self-medication, studies on self-medication practice and the safety profile of medicines used during pregnancy are scarce in our setting. This study determined the self-medication practice and safety profile of medicines used among pregnant women.</span></p> <p><strong><span>Methods: </span></strong><span>This cross-sectional study was conducted in face-to-face interviews among 345 pregnant women at three hospitals in Sierra Leone. Data were analyzed using descriptive statistics and binary logistic regression to <span>determine the prevalence and associated factors of self-medication. </span></span></p> <p><strong><span>Results: </span></strong><span>A total of 345 pregnant women participated in the study. The prevalence of self-medication among pregnant women with conventional and/or herbal medicine was </span><span>132 (38.3%)</span><span>. Also, 93 (75%) of the conventional medicines (CMs) were categorized as probably safe, of which paracetamol 36 (29.0%) was commonly used, followed by amoxicillin 23 (18.5%) and antimalarials 22 (17.7%) for common illnesses such as </span><span>headache 30 (25.4%), </span><span>urinary tract infection </span><span>23 (19.4%)<span> and malaria 22 (18.6%). The common reason for self-medication was previous experience with the disease 24 (27.3%). </span><em>Luffa acutangula</em> 19 (30.2%) <span>was the most used herbal medicine (HM), </span>and Oedema 30 (47.6%) was the most reported ailment. <span>Among the HM users,</span> 34 (54.0%)<span> believe they are more effective than CMs. Secondary school education (AOR = 2.128, 95%CI = 1.191 – 3.804, p = 0.011), tertiary education (AOR = 2.915, 95%CI = 1.104 – 7.693, p = 0.031), monthly income of greater than NLe 1,000 (AOR = 4.084, 95% CI = 1.269 – 13.144, p = 0.018), and perceived maternal illness (AOR = 0.367, CI = 0.213 – 0.632, p = <0.001) were predictors of self-medication.</span></span></p> <p><strong><span>Conclusion: </span></strong><span>Self-medication practice was highly prevalent and was associated with educational status, monthly income, and maternal illness during pregnancy. Therefore, intervention programs should be designed and implemented to minimize the practice and risk associated with self-medication among pregnant women.</span></p>
ScienceDex guides
Understand access before you commit
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.