Find research datasets worth reusing

opencc-by-4.0Dec 2014View details →

Sanguisorba stipulata (Rosaceae) - leaf - margin of upper + lower surface

Image of Sanguisorba stipulata (Rosaceae) - leaf - margin of upper + lower surface

opencc-by-4.0Dec 2014View details →

Heracleum maximum (Apiaceae) - leaf - margin of upper + lower surface

Image of Heracleum maximum (Apiaceae) - leaf - margin of upper + lower surface

opencc-by-4.0Jan 2025View details →

Marinoan Snowball Earth: The Impact of Deglaciation Duration on the Sea-Level History of Continental Margins

Paleogeographies, ice histories, and predicted relative sea level output are available here as Matlab (.mat) files. Complementary text (.txt) files are included for latitude, longitude, and time. For different file formats or any questions to their use, please contact the corresponding author, Freya K Morris at: morrisfreya15@outlook.com

opencc-by-4.0Sep 2024View details →

Data presented in Stress regimes and dynamic implications of the southeastern margin of the Tibetan Plateau: Insights from a refined focal mechanism catalog

The dataset includes thewaveform data required for source mechanism inversion presented in the paper Stress regimes and dynamic implications of the southeastern margin of the Tibetan Plateau: Insights from a refined focal mechanism catalog

opencc-by-4.0Aug 2020View details →

Unwrapping reworked crust at the Columbia supercontinent margin within Amazonian Craton using satellite potential field data synergy

This file contains the geochronology data inventory (Supplementary Material Table 1) as a MS Excel (*.xls) table used for interpretation in the  the original publication of 'Unwrapping reworked crust at the Columbia supercontinent margin within Amazonian Craton using satellite potential field data synergy'. Paper published in Geoscience Frontiers in early 2022.

opencc-zeroFeb 2022View details →

Environmental variation and biotic interactions limit adaptation at ecological margins: lessons from rainforest Drosophila and European butterflies

Models of local adaptation to spatially varying selection predict that maximum rates of evolution are determined by the interaction between increased adaptive potential owing to increased genetic variation, and the cost genetic variation brings by reducing population fitness. We discuss existing and new results from our laboratory assays and field transplants of rainforest Drosophila and UK butterflies along environmental gradients, which try to test these predictions in natural populations. Our data suggest that: (i) local adaptation along ecological gradients is not consistently observed in time and space, especially where biotic and abiotic interactions affect both gradient steepness and genetic variation in fitness; (ii) genetic variation in fitness observed in the laboratory is only sometimes visible to selection in the field, suggesting that demographic costs can remain high without increasing adaptive potential; and (iii) antagonistic interactions between species reduce local productivity, especially at ecological margins. Such antagonistic interactions steepen gradients and may increase the cost of adaptation by increasing its dimensionality. However, where biotic interactions do evolve, rapid range expansion can follow. Future research should test how the environmental sensitivity of genotypes determines their ecological exposure, and its effects on genetic variation in fitness, to predict the probability of evolutionary rescue at ecological margins. This article is part of the theme issue 'Species' ranges in the face of changing environments (Part II)'.

opencc-by-4.0Mar 2022View details →

Dataset for "Protracted subduction of the European hyperextended margin revealed by rutile U-Pb geochronology across the Dora-Maira massif (W. Alps)"

Dataset for "Protracted subduction of the European hyperextended margin revealed by rutile U-Pb geochronology across the Dora-Maira massif (W. Alps)" - Sample location - Rutile U-Pb-trace-element analyses - Titanite U-Pb-trace-element analyses

opencc-zeroApr 2022View details →

Dataset for manuscript entitled: Switchgrass cropping systems affect soil carbon and nitrogen and microbial diversity and activity on marginal lands

Switchgrass (Panicum virgatum L.), as a dedicated bioenergy crop, can provide cellulosic feedstock for biofuel production while improving or maintaining soil quality. However, comprehensive evaluations of how switchgrass cultivation and nitrogen (N) management impact soil and plant parameters remain incomplete. We conducted field trials in three years (2016–2018) at six locations in the North Central Great Lakes Region to evaluate the effects of cropping systems (switchgrass, restored prairie, undisturbed control) and N rates (0, 56 kg N ha-1 yr-1) on biomass yield and soil physicochemical, microbial, and enzymatic parameters. Switchgrass cropping system yielded an aboveground biomass 2.9–3.3 times higher than the other two systems (Jayawardena et al., In submission) but our study found that this biomass accumulation didn't reduce soil dissolved organic C (DOC), total dissolved N (TDN), or bacterial diversity. The annual aboveground biomass removal for bioenergy feedstock, however, reduced soil microbial biomass C (MBC) and N (MBN) and bacterial richness in the 2nd and 3rd years; despite this, continuous monocropping of switchgrass improved soil TDN, inorganic N, bacterial diversity, and shoot biomass in the 2nd and/or 3rd years when compared to the 1st year. N fertilization increased aboveground biomass yield by 1.2 times and significantly increased soil TDN, MBN, and the shoot biomass of switchgrass when compared to the unfertilized control. Locations with higher C and N contents and lower C:N ratio had higher aboveground biomass, MBC, MBN, and the activity of BG, CBH, and UREA enzymes; by contrast, locations with higher pH had higher soil TDN and activity of NAG and LAP enzymes. Our research demonstrates that switchgrass cultivation could improve or maintain soil N content and N fertilization can increase plant biomass yield. The comprehensive data also can inform future biogeochemical models to successfully implement switchgrass for bioenergy production.

opencc-by-4.0May 2022View details →

Event Data used in Seismic anisotropy along the Haida Gwaii margin from receiver function analysis

This CSV file contains metadata for earthquake events used in the study: Seismic anisotropy along the Haida Gwaii margin from receiver function analysis Event start time (UTC), latitude, longitude, depth, magnitude and the seismic station at which the event is recorded are included.

Hourly average and marginal electricity mixes for Spain for assessing systems with variable load or power

This upload contains the Supplementary Information file and the underlying data as Excel-file for the referenced Journal article ("Hourly marginal electricity mixes and their relevance for assessing the environmental performance of installations with variable load or power") More specifically, it provides <ul> <li>time series of the Spanish electricity generation mix for the year 2021 for energy system analysis (as used as basis for the underlying publication), including imports and environmental impacts of the hourly generation mix for all EF3.0 impact categories (Marginal_Electricity_Results_Analysis_2021_V17.xls)</li> <li>a spreadshhet calculator for determining the average and marginal hourly benefits of a generator with variable load (a PV installation, but the generation profile can be substituted by any other) Load-Gen_Balancing__V15.xlsm</li> <li>life cycle inventory data for import into openLCA and re-use in combination with the ecoinvent databse (Version 3.7.1).</li> </ul> Further details are available on request to the main author.

opencc-zeroJun 2022View details →

Ecological and geographical marginality in rear edge populations of Palaearctic forest birds (data)

The centre–periphery hypothesis predicts that habitat suitability will decrease at the edge of a species' range, a pattern often questioned by empirical data. Here we explore if habitat suitability decreases southwards and shapes the abundance distribution of rear edge populations of forest birds within the restricted geographical setting of the south-western Palaearctic. We also test if birds endemic to the area fit more poorly to the latitudinal decrease of habitat suitability due to the putative effect of adaptations to regional conditions. Location: North-western Africa (Morocco) Time period: Present day Major taxa studied: Passerines (11 species) Methods: Bird occurrences were used to model species distribution and line transects were used to estimate bird abundance. Occurrence probabilities provided by species distribution models were used to display the spatial patterning of habitat suitability. Habitat suitability was employed to predict abundance after controlling for the effect of the distance to some regional source areas of forest birds (tree covered large areas). The species were classified as North African endemic according to an updated review of their taxonomic status. Results: Habitat suitability decreased southwards, supporting the predicted relationship between ecological and geographical marginality in most species. Abundance was positively correlated to habitat suitability and negatively correlated to distance to source areas. The taxonomic status of birds did not affect the patterns. Main conclusions: The southward decrease of habitat suitability predicted by the centre–periphery hypothesis shapes the distribution of rear edge populations of forest birds within the south-western Palaearctic. As most of these populations are endemic, the results suggest that they track the gradients in isolation within the geographical setting of north-western Africa. These results support the vulnerability of these isolated, peripheral populations of forest birds to large-scale environmental changes in a region under the effect of increasing drought and temperature.

opencc-zeroJun 2022View details →

Transient amplification enhances the persistence of tropicalising coral assemblages in marginal high latitude environments

Predicting the viability of species exposed to increasing climatic stress requires an appreciation for the mechanisms underpinning the success or failure of marginal populations. Rather than traditional metrics of long-term population performance, here we illustrate that short-term (i.e., transient) demographic characteristics, including measures of resistance, recovery, and compensation, are fundamental in the poleward range expansion of hard corals, facilitating the establishment of coral populations at higher latitudes. Through the annual census of tropical and subtropical Acropora spp. colonies in Japan between 2017-2019, we show how enhanced transient amplification (i.e., short-term increases in population growth following disturbance) supports the persistence of coral assemblages within more variable high-latitude environments. The transient dynamics of both the tropical and subtropical assemblages were strongly influenced by their corresponding recruitment patterns. However, we demonstrate that variation in colony survival and fragmentation patterns between the two assemblages determines their relative capacities for transient amplification. This latitudinal variation in the transient dynamics of Acropora spp. assemblages emphasises that coral populations can possess the demographic plasticity necessary for exploiting more variable, marginal conditions.

Fig. 7 in Abyssal vent field habitats along plate margins in the Central Indian Ocean yield new species in the genus Anatoma (Vetigastropoda: Anatomidae)

Fig. 7. Radula of Anatoma declivis sp. nov., South-East Indian Ridge, INDEX19_127RO, (I19_Ma_78).

opencc-zeroDec 2021View details →

Site impacts nutrient translocation efficiency in intra- and interspecies miscanthus hybrids on marginal lands

Miscanthus, a C4 perennial rhizomatous grass, is capable of growing in varied climates and soil types in Europe, including on marginal lands. It can produce high yields with low nutrient inputs when harvested after complete senescence. Senescence induction and rate depend on complex genetic, environmental, and management interactions. To explore these interactions, we analysed four miscanthus hybrids (two novel seed-based hybrids, GRC 3 (M. sinensis × sinensis) and GRC 14 (M. sacchariflorus × sinensis); GRC 15, a novel M. sacchariflorus × sinensis clone; and GRC 9, a standard M. × giganteus clone) in Italy, Croatia, Germany and the UK. Over all trial locations and hybrids, the average aboveground biomass of the three-year-old stands in August 2020 was 15 t DM ha-1 with nutrient contents of 7.6 mg N g-1 and 14.6 mg K g-1. As expected, delaying the harvest until spring reduced overall yield and nutrient contents (12 t DM ha-1, 3.3 mg N g-1 and 5.5 mg K g-1). At lower latitudes, the late-ripening M. sacchariflorus × sinensis GRC 14 and GRC 15 combined high yields with low nutrient contents. At the most elevated latitude location (UK), the early-ripening M. sinensis × sinensis combined high biomass yields with low nutrient offtakes. The clonal M. × giganteus with intermediate flowering and senescence attained similar low nutrient contents by spring harvest at all four locations. Seasonal changes in yield and nutrient levels analysed in this study provide: 1) a first step towards recommending hybrids for specific locations and end uses in Europe; 2) crucial data for determination of harvest time and practical steps in the valorisation of biomass; and 3) key sustainability data for life cycle assessments. Identification of trade-offs resulting from genetic × environment × management interactions are critical for increasing sustainable biomass supply from miscanthus grown on marginal lands.

Low-fold seismic reflection data acquired across the Northern Hikurangi subduction margin and incoming Hikurangi Plateau, New Zealand

Two-dimensional seismic reflection data were acquired on two surveys of the Northern Hikurangi subduction margin, New Zealand in 2011 and 2015. The survey data were collected to support research of tectonic structure, slow slip processes, stratigraphic architecture, and thermal state of the subduction margin and incoming plate, as well as to support ocean-floor drilling associated with IODP Expeditions 372 and 375. The surveys include (1) R/V Tangaroa NIWA voyage TAN1114 undertaken in 2011 by the National Institute of Water and Atmospheric Research (NIWA) and GNS Science, as part of the OS2020 Northern Hikurangi Margin Geohazards survey; and (2) R/V Rodger Revelle cruise RR1508 undertaken in 2015 by Oregon State University as part of the Subduction Thrust Investigation of New Zealand using Geothermics and Seismics (STINGS) project (see Figure 1). TAN1114 voyage was funded by the New Zealand Government Oceans 2020 Programme, and core research programme funding by NIWA and GNS Science. Cruise RR1508 was funded by NSF grants OCE-1355878 and OCE-1355870.   R/V Tangaroa TAN1114 Seismic Data Data Acquisition:  The seismic system used on R/V Tangaroa during the 2011 National Institute of Water and Atmospheric Research (NIWA) survey TAN1114 included a source comprising two Sodera 45/105 GI guns operated in true GI mode. The guns were deployed 35 m behind the vessel RV Tangaroa at 5 m water depth. Lines TAN1114-01 to -13, and part of line 14 were acquired with a shot interval of 10.8 seconds (~25 m sailing at 4.5 knots), providing a nominal coverage of 12-fold data. Part of line TAN1114-14 and lines 15-23 were acquired with a shot interval of 21.6 seconds (~50 m sailing at 4.5 knots), providing a nominal 6-fold coverage. Data were recorded on a Geometrics GeoEel 48-channel seismic streamer with 6 X 100 m active sections, and a group interval of 12.5 m. The streamer was deployed at a depth of 7.5 m, apart from line TAN1114-01 where it was towed at 5 m depth. Depth control was maintained with a CSMX depth control system including three DigiCourse 5011 compass birds. The record length was 8 s and the sample rate 2 ms. Differential GPS was used for positioning. Table 1 summarises TAN1114 recording parameters and Table 2 lists TAN1114 lines acquired and processed. TAN1114 line coordinates are detailed in Table 3. Data Processing:  A total of 29 seismic lines were processed providing 1350 km of multichannel seismic reflection data. The lines were processed to post-stack time-migrated SEGY sections, using GNS Science GLOBE CLARITAS. With allowance for overlap of line segments the data were grouped into 51167 shot-point locations. Raw data were written to disk as IBM standard SEG-Y files. IBM Claritas Extended SEG-Y data were written to disk after geometry was added, after stack, and after migration. Shots were CDP sorted from disk during the stacking process to avoid creating large and unnecessary separate CDP sorted files.  Post-stack migration (finite difference migration) has been applied to the stacked sections to produce a dip-true image, this results in clearer resolution of structural features such as faults and folds, and of detailed sedimentary features such as on-lapping and truncated reflections. Sea-floor multiple reflections disturb structural imaging especially in water depths less than 500 m.  All seismic data are written to disk as processed sections in SEG-Y format. Line TAN1114-A is a composite splice including parts of lines TAN1114-4A, -6A and 7A. Details of the TAN1114 processing parameters are given in Table 4 and SEG-Y trace headers in Table 5.   R/V Rodger Revelle RR1508 Seismic Data Data Acquisition: The 2015 R/V Rodger Revelle survey RR1508 used a seismic system operated by Scripps Institute of Oceanography. Of two sub-regions surveyed during this cruise, only data from the northern Hikurangi margin are presented here. The seismic system used was similar to that on Tangaroa TAN1114, including a source comprising two Sodera 45/105 GI guns operated in true GI mode. The guns were deployed at a depth of 3.5 m and the shot spacing was 25 m.  Data were recorded on a Geometrics GeoEel 48-channel seismic streamer with 6 X 100 m active sections, and a group interval of 12.5 m. The streamer was deployed at a depth of 3.5 m. During acquisition of the HKS01 lines, only the nearest 40 data channels were recorded. The record length was 8 s and the sample rate 1 ms. Differential GPS was used for positioning. Table 6 summarises RR1508 recording parameters and Table 7 lists RR1508 lines acquired and processed. Data Processing: A total of 13 HKS01 seismic lines were processed to post-stack time-migrated SEGY sections, using GNS Science GLOBE CLARITAS. Data processing included application of geometry, sorting, trace editing, normal moveout correction, stack, filtering and finite difference migration. All seismic data are written to disk as processed sections in SEG-Y format. Details of the RR1508 processing parameters are given in Table 8 and SEG-Y trace headers in Table 9.   List of files Figure 1. TAN1114 and RR1508 seismic line locations on the northern Hikurangi margin. Table 1. Summary of TAN1114 recording parameters. Table 2. Summary of TAN1114 lines acquired and processed. Table 3. Summary of TAN1114 line coordinates. Table 4.  Summary of TAN1114 seismic processing sequence. Table 5.  Summary of TAN1114 SEG-Y trace headers. Table 6. Summary of RR1508 recording parameters. Table 7. Summary of RR1508 lines acquired and processed. Table 8.  Summary of RR1508 seismic processing sequence. Table 9.  Summary of RR1508 SEG-Y trace headers.   Processed SEGY seismic data TAN1114-01.sgy TAN1114-02.sgy TAN1114-03.sgy TAN1114-04.sgy TAN1114-04A.sgy TAN1114-05.sgy TAN1114-06.sgy TAN1114-06A.sgy TAN1114-07.sgy TAN1114-07A.sgy TAN1114-08.sgy TAN1114-09.sgy TAN1114-10.sgy TAN1114-10B.sgy TAN1114-11.sgy TAN1114-12.sgy TAN1114-12T.sgy TAN1114-13.sgy TAN1114-14.sgy TAN1114-15.sgy TAN1114-16.sgy TAN1114-17.sgy TAN1114-18.sgy TAN1114-19.sgy TAN1114-20.sgy TAN1114-21.sgy TAN1114-22.sgy TAN1114-23.sgy TAN1114-A.sgy RR1508-HKS01_01.sgy RR1508-HKS01_02.sgy RR1508-HKS01_02A.sgy RR1508-HKS01_03.sgy RR1508-HKS01_04.sgy RR1508-HKS01_05.sgy RR1508-HKS01_05A.sgy RR1508-HKS01_06.sgy RR1508-HKS01_07.sgy RR1508-HKS01_08.sgy RR1508-HKS01_09.sgy RR1508-HKS01_09A.sgy RR1508-HKS01_10.sgy

Evolved transcriptional responses and their trade-offs after long-term adaptation of Bemisia tabaci to a marginally-suitable host

Scripts and data used in the work "Evolved transcriptional responses and their trade-offs after long-term adaptation of Bemisia tabaci to a marginally-suitable host". Abstract: Although generalist insect herbivores can migrate and rapidly adapt to a broad range of host plants, they can face significant difficulties when accidentally migrating to novel and marginally-suitable hosts. What happens, at both the performance and transcriptional levels, if these marginally-suitable hosts must be used for multiple generations before migration to a suitable host can take place, largely remains unknown. In this study, we established multigenerational colonies of the whitefly Bemisia tabaci, a generalist phloem-feeding species, adapted to a marginally-suitable host (habanero pepper) or an optimal host (cotton). We used reciprocal host tests to estimate the differences in performance of the populations on both hosts under optimal (30 oC) and mild-stressful (24 oC) temperature conditions, and documented the associated transcriptomic changes. The habanero pepper-adapted population greatly improved its performance on habanero pepper but did not reach its performance level on cotton, the original host. It also showed reduced performance on cotton, relative to the non-adapted population, and an antagonistic effect of the lower-temperature stressor. The transcriptomic data revealed that most of the expression changes, associated with long-term adaptation to habanero pepper, can be categorized as “evolved” with no initial plastic response. Three molecular functions dominated: enhanced formation of cuticle structural constituents, enhanced activity of oxidation-reduction processes involved in neutralization of phytotoxins and reduced production of proteins from the cathepsin B family. Taken together, these findings indicate that generalist insects can adapt to novel host plants by modifying the expression of a relatively small set of specific molecular functions.

opencc-by-4.0Oct 2022View details →

Pore water and headspace gas data from Sites J1005 and J1006 on the south Chilean Margin

Pore water elemental and isotopic measurements, and headspace gas data, from Sites J1005 and J1006 on the south Chilean Margin. Tab 1: Site J1005 pore water chemistry Tab 2: Site J1006 pore water chemistry Tab 3: Headspace gas data at J1005 and J1006 Tab 4: Na/K geothermometer estimates Tab 5: Pore water sulfate diffusive flux calculations

opencc-by-4.0Dec 2009View details →

Quercus chrysolepis (Fagaceae) - leaf - margin of upper + lower surface

Image of Quercus chrysolepis (Fagaceae) - leaf - margin of upper + lower surface

opencc-by-4.0Dec 2009View details →

Quercus chrysolepis (Fagaceae) - leaf - margin of upper + lower surface

Image of Quercus chrysolepis (Fagaceae) - leaf - margin of upper + lower surface