Find research datasets worth reusing

opencc-by-nc-4.0Mar 2024View details →

CoUDlabs_TA_USFD_02_ANNULAR_Regueiro. Time series analysis of sewer temperatures in an annular flume to estimate sediment accumulation

This dataset contains the results of the experimental campaign and how data were collected on the the <a href="https://co-udlabs.eu/">Co-UDlabs</a> Transnational Access project: Temperature time series analysis for predicting sedimentation in sewer systems, by Regueiro-Picallo et al. The Transnational Access project was funded under the European Union’s Horizon 2020 research and innovation programme under grant agreement No 101008626. The experiments were designed to further develop an innovative methodology for measuring sediment bed deposits in UDS based on temperature data analysis (<a href="https://doi.org/10.1039/D2EW00820C" target="_blank" rel="noopener">Regueiro-Picallo et al., 2023</a>; <a href="https://doi.org/10.1039/D3EW00825H" target="_blank" rel="noopener">Regueiro-Picallo et al., 2024</a>). Particularly, the aim of these experiments was to study the influence of the sewer hydrodynamics for estimating the sediment accumulation using temperature-based methods. Therefore, the main tasks of this project were the design of a temperature-control system for the ANNULAR flume to reproduce sewer temperature patterns, and the development of an experimental campaign including different flow, sediment depth and temperature pattern conditions. The purpose of these measurements is to prove the use of simplified systems to monitor sediment accumulation in sewer systems. The data are described so that others can use and reproduce.

Fig. 3 in Mercury accumulation in adults of two large species of diving beetles (Coleoptera: Dytiscidae)

Fig. 3. Mercury concentrations in different female morphs of C. lateralimarginalis and D. circumcinctus. Designations as in Fig.1. Рис. 3. Содержание ртути в раЗных морфах самок C. latermarginalis и D. circumcinctus. ОбоЗначениЯ как на Рис. 1.

Fig. 4 in Mercury accumulation in adults of two large species of diving beetles (Coleoptera: Dytiscidae)

Fig. 4. Dependence between mercury concentrations and body weight Рис. 4. Диаграмма Зависимости концентрации ртути от массы тела.

Fig. 2 in Mercury accumulation in adults of two large species of diving beetles (Coleoptera: Dytiscidae)

Fig. 2. Histogram of mercury concentrations in the studied species. Рис. 2. Гистограмма распределениЯ концентрации ртути длЯ иЗученных видов.

Fig. 1 in Mercury accumulation in adults of two large species of diving beetles (Coleoptera: Dytiscidae)

Fig. 1. Average dry weight of the beetles and average mercury concentration (Hg) in the studied species (median; IQR; observable minimum and maximum; outliers). Рис. 1. Средний сухой вес жуков (Weight), и обЩаЯ концентрациЯ ртути (Hg) в иЗученных видах (медиана; межквартильный раЗмах; наблюдаемые минимум и максимум; выбросы).

opencc-by-4.0Nov 2024View details →

Controlling effect of sliding zone soil on rainfall-triggered accumulation landslide in Qinling-Bashan Mountains – a typical case study

The document contains the original data of the physical and mechanical tests of the slip soil in the research paper. It mainly includes the following five tables: Table 1 Physical properties of the soil samples; Table 2 Experimental scheme of ring shear tests;  Table 3 Loading scheme of the creep test; Table 4 Long-term strength of specimens under different conditions; Table 5 Parameters of geotechnical materials used in the numerical model.

opencc-by-4.0Nov 2024View details →

Gładysz, K., Wrochna M., & Popek, R. (2024) Tracking Particulate Matter Accumulation on Green Roofs: A Comparative Study at Warsaw University Library - DATA

Open the record for dataset details and reuse information.

opencc-by-4.0Nov 2024View details →

Dataset: The role of long-term hydrodynamic evolution in the accumulation and preservation of organic carbon-rich deposits in the shelf seas

Output files from harmonic analysis of regional tidal model, glacial isostatic adjustment model input and output (relative sea level and ice sheet extent datasets), and scripts for figure generation. If using these data, please cite:  Ward, S.L., Bradley, S.L., Roseby, Z.A., Wilmes, S.B., Vosper, D.F., Roberts, C.M. and Scourse, J.D., 2025. The role of long‐term hydrodynamic evolution in the accumulation and preservation of organic carbon‐rich shelf sea deposits. Journal of Geophysical Research: Oceans, 130(4), p.e2024JC022092. <a href="https://doi.org/10.1029/2024JC022092">https://doi.org/10.1029/2024JC022092</a>

opencc-by-4.0Nov 2021View details →

Fonseca_et_al_submitted_to_GRL_interseismic_strain_rate_accumulation_near_Lisbon_DATA_FILES

Data used in the figures of Fonseca et al. (submitted to GRL), Interseismic Strain Accumulation near Lisbon from Space Geodesy

opencc-zeroNov 2021View details →

Climatic controls on soil carbon accumulation and loss in a dryland ecosystem

Arid and semiarid ecosystems drive year-to-year variability in the strength of the terrestrial carbon (C) sink, yet there is uncertainty about how soil C gains and losses contribute to this variation. To address this knowledge gap, we embedded C-depleted soil mesocosms, containing litter or biocrust C inputs, within an in situ dryland ecosystem warming experiment. Over the course of one year, changes in microbial biomass and total soil organic C pools were monitored alongside hourly measurements of soil CO2 flux. We also developed a biogeochemical model to explore the mechanisms that gave rise to observed soil C dynamics. Field data and model simulations demonstrated that water exerted much stronger control on soil biogeochemistry than temperature, with precipitation events triggering large CO2 pulses and transport of litter- and biocrust-derived C into the soil profile. We expected leaching of organic matter would result in steady accumulation of C within the mineral soil over time. Instead, the size of the total organic C pool fluctuated throughout the year, largely in response to microbial growth: increases in the size of microbial biomass were negatively correlated with the quantity of C residing in the top 2 cm, where most biogeochemical changes were observed. Our data and models suggest that microbial responses to precipitation events trigger rapid metabolism of dissolved organic C inputs, which strongly limit accumulation of autotroph-derived C belowground. Accordingly, changes in the magnitude and/or frequency of precipitation events in this dryland ecosystem could have profound impacts on the strength of the soil C sink.

opencc-by-4.0Dec 2020View details →

Effect of the growth medium composition on nitrate accumulation in the novel protein crop Lemna minor

Duckweed is a potential alternative protein source for food and feed. However, little is known about the nitrate accumulation in this plant. A high nitrate level in vegetables can indirectly lead to an elevated intake of nitrites and N-nitroso compounds, increasing the risk of diseases for humans and animals. This research hypothesizes that the nitrate accumulation of Lemna minor differs between growing media. Additionally, it evaluates whether legal safety levels of nitrate for human and animal intake are exceeded. The duckweed was grown on (i) rainwater, and (ii) three synthetic media containing different nutrient levels. Furthermore, (iii) biological effluent of swine manure treatment and (iv) aquaculture effluent from pikeperch production were used, as these are potential media for closing nutrient loops in the agriculture sector. It was found that nitrate levels increased with the increasing availability of macronutrients in the water, and pH showed a particularly strong negative correlation with the nitrate levels in the plant. Nevertheless, nitrate content never exceeded 530 mg NO3 kg−1 fresh weight. To conclude, Lemna minor's nitrate content was below safety limits for human consumption in all tested growing media; however, a potential risk for ruminants was observed as these are more sensitive to nitrate conversions in their gastro-intestinal track.

opencc-zeroDec 2021View details →

Data from: Selection bias in mutation accumulation

Mutation accumulation (MA) experiments, in which de novo mutations are sampled and subsequently characterized, are an essential tool in understanding the processes underlying evolution. In microbial populations, MA protocols typically involve a period of population growth between severe bottlenecks, such that a single individual can form a visible colony. While it has long been appreciated that the action of positive selection during this growth phase cannot be eliminated, it is typically assumed to be negligible. Here, we quantify the effect of both positive and negative selection in MA studies, demonstrating that selective effects can substantially bias the distribution of fitness effects (DFE) and mutation rates estimated from typical MA protocols in microbes. We then present a simple correction for this bias which applies to both beneficial and deleterious mutations, and can be used to correct the observed DFE in multiple environments. We use simulated MA experiments to illustrate the extent to which the MA-inferred DFE differs from the underlying true DFE, and demonstrate that the proposed correction accurately reconstructs the true DFE over a wide range of scenarios; we also provide an example of these corrections applied to experimental data. These results highlight that positive selection during microbial MA experiments is in fact not negligible, but can be corrected to gain a more accurate understanding of fundamental evolutionary parameters.

opencc-zeroDec 2021View details →

Disentangling the roles of plant functional diversity and plaint traits in regulating plant nitrogen accumulation and denitrification in freshwaters

1. There is a growing recognition that functional measures of diversity, based on quantification of functionally important species traits, are useful for explaining variation in ecosystem processes. However, the mechanisms linking functional diversity to different processes remain poorly understood, hindering development of a predictive framework for ecosystem functioning based on species traits. 2. The current understanding of how the functional traits of aquatic plants (macrophytes) affect nitrogen (N) cycling by regulating microbial communities and their activity in freshwater habitats is particularly limited. Denitrifying bacteria are typically associated with the roots of both aquatic and terrestrial plants and denitrification is the main cause of loss of N from ecosystems. Disentangling the interplay between plants and microbial denitrifiers is key to understanding variation in rates of denitrification from local to landscape scales. 3. In a mesocosm experiment, we varied the species richness (monocultures or two- species mixtures) and composition of macrophytes. We quantified effects of both macrophyte functional diversity, quantified as functional trait dissimilarity, and functional trait composition, quantified as community weighted mean trait values, on N removal in wetlands. We used structural equation modelling to disentangle the direct and indirect influences of traits on N accumulation in plant biomass, denitrification activity and abundance of key bacterial denitrification genes (nirSand nirK). 4. Both functional diversity and functional trait composition regulated N removal, explaining 70 – 94% variation in the underlying ecosystem processes. Increased macrophyte functional diversity increased plant N accumulation, and indirectly enhanced denitrification by increasing denitrification gene abundance. Among traits, greater plant relative growth rates, specific leaf area and aboveground biomass increased plant N accumulation. Denitrification activity increased with increasing belowground biomass but decreased with increasing root diameter. 5. These findings improve our understanding of N removal in freshwater wetlands dominated by macrophytes, and have broad ecological implications for wetland management targeting enhanced ecosystem services. Our results highlight the potential for optimising denitrification and plant N accumulation in wetlands and thereby improving water purification by increasing macrophyte functional diversity and ensuring the presence of key traits in macrophyte assemblages.

opencc-by-4.0Jan 2022View details →

Dataset of sediment accumulation rate (SAR) for lake (and peat) records in China

Excel spreadsheet containing: Table S1) table of site information, dating method, and all sediment accumulation rate (SAR) data; Table S2) the 1-kyr-bined median and mean ± standard error (SE) for both SARs and stalagmite O18 from 30 ka BP to the present; and 3) reference list for our dataset. This dataset relates to: Zhang, F., Li, S. H., Sun C. P., Li, W. P., Zhao, X., Chen, Z.Y., Nie, T. Y., Chen, Y. S., Li, X. X. Human impacts overwhelmed hydroclimate control of soil erosion in China 5000 years ago. Submitted to Geophysical Research Letters

opencc-zeroFeb 2022View details →

A group of ectomycorrhizal fungi restricts organic matter accumulation in boreal forest

Boreal forest soils are important global carbon sinks, with significant storage in the organic topsoil. Decomposition of these stocks requires oxidative enzymes, uniquely produced by fungi. Across Swedish boreal forests, we found that local carbon storage in the organic topsoil was 33% lower in the presence of a group of closely related species of ectomycorrhizal fungi – Cortinarius acutus s.l.. This observation challenges the prevailing view that ectomycorrhizal fungi generally act to increase carbon storage in soils but supports the idea that certain ectomycorrhizal fungi can complement free-living decomposers, maintaining organic matter turnover, nutrient cycling and tree productivity under nutrient-poor conditions. The indication that a narrow group of fungi may exert a major influence on carbon cycling questions the prevailing dogma of functional redundancy among microbial decomposers. Cortinarius acutus s.l. responds negatively to stand-replacing disturbance, and associated population declines are likely to increase soil carbon sequestration while impeding long-term nutrient cycling.

opencc-by-4.0Feb 2022View details →

Derived products from "Beyond glacier wide mass balances: parsing seasonal elevation change into spatially-resolved patterns of accumulation and ablation at Wolverine Glacier, Alaska"

Distributed mass balances, emergence velocities, firn compaction rates, and co-registered 10 m resolution DEMs from "Beyond glacier wide mass balances: parsing seasonal elevation change into spatially-resolved patterns of accumulation and ablation at Wolverine Glacier, Alaska" (in review) (Zeller et al., 2022).

opencc-zeroApr 2022View details →

Data from: Temporal variability in snow accumulation and density at Summit Camp, Greenland ice sheet

A 3-year record of weekly snow water equivalent (SWE) accumulation at Summit Camp, central Greenland ice sheet, obtained by direct sampling, is presented. While the overall SWE accumulation of 24.2 cm w.e. a−1 matches long-term ice core estimates, variability increases at shorter timescales. Half of the annual SWE accumulation occurs during a few large events, with the average accumulation rate decreasing 35% between the first and second halves of the record coinciding with exceptional anticyclonic conditions in the spring and summer of 2019. No seasonality in accumulation is detected. Rather, local accumulation rates appear to be significantly impacted by wind redistribution that obscures temporal patterns in snowfall. Surface snow density is consistent, on average, with previously measured values but does not correlate with near surface temperature or wind speed. Two surface mass balance reanalysis models significantly underestimate accumulation rates at Summit Camp. This is concerning because such models are often used to estimate ice-sheet mass loss.

opencc-zeroMay 2022View details →

Ancient geological dynamics impact neutral biodiversity accumulation and are detectable in phylogenetic reconstructions

Aim Landmasses have been continuously modified by tectonic activity, the breakup and collision of landmasses is thought to have generated or suppressed ecological opportunities, altering the rates of speciation, dispersal and extinction. However, the extent to which the signatures of past geologic events are retained in modern biodiversity patterns - or obliterated by recent ecological dynamics - remains unresolved. We aim to identify the fingerprint of different scenarios of geological activity on phylogenetic trees and geographic range size distributions. Location Global. Time period Geological time. Major taxa studied Theoretical predictions for any taxa. Methods We conducted spatially explicit simulations under a neutral model of range evolution, speciation and extinction for three different geological scenarios that differed in their geological histories. We set a limit in the number of populations that locally can coexist which along with the geographic boundaries of landmasses, influences the rate of range expansion. Results Our results demonstrate regions of similar size, age and ecological limits will differ in richness and macroevolutionary patterns based solely on the geological history of landmass breakup-collision even in the absence of species' ecological differences i.e., neutrality. When landmasses collide, regional richness is higher, lineages exhibit more similar rates of speciation and phylogenetic trees are more balanced than in the geologically static scenario. Stringent local limits to coexistence yield lower regional diversity but in general do not affect our ability to distinguish geological scenarios. Main conclusions These findings provide an alternative explanation for existence of some hotspots of diversity in areas of high geological activity. Although a limit in the number of coexisting species largely influences regional diversity, its contribution to phylogenetic patterns is lower than variation in per-capita rates of speciation and extirpation. Importantly, these findings demonstrate the potential for inferring past geological history from distributions of phylogenies and range sizes.

opencc-by-4.0May 2022View details →

The GBA variant E326K is associated with alpha-synuclein aggregation and lipid droplet accumulation in human cell lines.

Raw data corresponding to graphs in publication: The GBA variant E326K is associated with alpha-synuclein aggregation and lipid droplet accumulation in human cell lines. Files are titled with the figure number. Each graph is on a different tab within the excel spreadsheet.