University of Stirling
University of Stirling: DataSTORRE (Stirling Online Repository for Research Data)Not a member yet
118 research outputs found
Sort by
Findon 7 Pinus sylvestris denrochronological dataset
No full textThis dataset consists of tree ring width measurements (dendrochronological measurements) calculated from cross sectional discs taken along the lengths of Pinus sylvestris trees felled in the north-east of Scotland (Site name: Findon 7, location: 57° 36′ 23″ N, 4° 16′ 50″ W) in the winters of 2002 and 2003. Trees were established in 1935 as a spacing experiment with high (FR5) and low density (FR6) stands stocked at 1047 live trees per hectare (FR5) and 647 live trees per hectare (FR6) at the time of sampling. Tree ring width measurements were calculated for 0.3m, 1.3m and 3.3m stem heights in both density treatments using Windendro software, though not all trees are represented at all stem heights as only disc images within ± 30cm from 0.3m, 1.3m and 3.3m high were selected for processing. This approach ensured that measurements were consistently taken from a similar stem height, whilst allowing for some variation in the precise location of each disc (e.g. due to the location of branch whorls). All tree-ring width data have been crossdated using the leave one out principle in the dplR package in R (Bunn et al., 2019). These data were generated to calculate the resilience of Scottish P. sylvestris trees to historic extreme drought events as part of a PhD research project titled "Assessing the resilience of UK forests to drought".FR6_BA_Complete: Crossdated P. sylvestris ring widths for samples collected within ±30cm from 0.3m stem height in the low density stand (FR6).
FR6_DBH_Complete: Crossdated P. sylvestris ring widths for samples collected within ±30cm from 1.3m stem height in the low density stand (FR6).
FR6_3.3m_Complete: Crossdated P. sylvestris ring widths for samples collected within ±30cm from 3.3m stem height in the low density stand (FR6).
FR5_BA_Complete: Crossdated P. sylvestris ring widths for samples collected within ±30cm from 0.3m stem height in the high density stand (FR5).
FR5_DBH_Complete: Crossdated P. sylvestris ring widths for samples collected within ±30cm from 1.3m stem height in the high density stand (FR5).
FR5_3.3m_Complete: Crossdated P. sylvestris ring widths for samples collected within ±30cm from 3.3m stem height in the high density stand (FR5).For additional enquiries, please contact [email protected]
Number Estimation Studies
No full textThe dataset comes from 3 independent EEG studies on number estimation described in the forthcoming Gheorghiu & Dering, "Shape before number: brain potentials and microstates reveal the interplay between form and numerosity in human vision."32 data files containing - The dataset comes from 3 independent EEG studies on number estimation described in "Gheorghiu & Dering, Shape before number: brain potentials and microstates reveal the interplay between form and numerosity in human vision." Please see readme file for more detailed description
Supplemental data for: "Effect of whole-genome duplication on the evolutionary rescue of sterile hybrid monkeyflowers"
No full textHybridisation is a creative evolutionary force, increasing genomic diversity, and facilitating adaptation and even speciation. Hybrids often face significant challenges to become established, including reduced fertility arising from genomic incompatibilities between their parents. Whole genome duplication in hybrids (allopolyploidy) can restore fertility, cause immediate phenotypic changes, and generate reproductive isolation. Yet the survival of polyploid lineages is uncertain, and few studies have compared the performance of recently formed allopolyploids and their parents under field conditions. Here we use natural and synthetically-produced hybrid and polyploid monkeyflowers (Mimulus spp.) to study how polyploidy contributes to the fertility, reproductive isolation, phenotype and performance of hybrids in the field. We find that polyploidisation restores fertility and that allopolyploids are reproductively isolated from their parents. The phenotype of allopolyploids displays the classic gigas effect of whole genome duplication, producing plants with larger organs and slower flowering. Field experiments indicate that survival of synthetic hybrids before and after polyploidisation is intermediate between the parents, whereas natural hybrids have higher survival than all the other taxa. We conclude that hybridisation and polyploidy can act as sources of genomic novelty, but adaptive evolution is key in mediating the establishment of young allopolyploid lineages.Vallejo-Marin et al. Plant Communications. Supplementary Datasets
1) Field_Leadhills_survenddat_for_pedigree_20200608.txt
Data un survival for Leadhills field experiment.
2) Field_Stirling_datp_for_pedigree_20200608.txt
Data on survival for field experiment carried out at the University of Stirling
3) Germination_datgs_20200608.csv
Data on germination of intra- and interspecific crosses.
4) Glasshouse_phenotypic_data_morph1_20200608.csv
Phenotypic data on common garden experiment carried out at the University of Stirling glasshouses1.
Wild fish fatty acid markers
No full textThe data collected includes biometrics (mass (g), total length (cm), fulton’s condition index (FCI), hepatosomatic index (HSI)), stomach contents, fatty acids and lipids (%) of flesh for mackerel (Scomber scombrus) and whiting (Merlangius merlangus) collected near and away from two fish farms on the West coast of Scotland. The two fish farms were found in Loch Melfort and Loch Leven. The data was collected in 2014 at two fish farms and reference cites in Loch Melfort and Loch Leven. In Loch Melfort the fish that was farmed was halibut (Hippoglossus hippoglossus) and in Loch Leven the fish that was farmed was Atlantic salmon (Salmo salar). All samples for fatty acids and lipids were run in duplicates.1 excel spreadsheet with biometrics (mass (g), total length (cm), fulton’s condition index (FCI), hepatosomatic index (HSI)), stomach contents, fatty acids and lipids (%) of flesh for mackerel (Scomber scombrus) and whiting (Merlangius merlangus) collected near and away from two fish farms on the West coast of Scotland
Elucidating the role of colour in shape processing in human vision
No full textShape-adaptation studies show that surround textures can inhibit the processing of contours. Using event-related potentials (ERP), we examined the time-course of neural processes involved in contour-shape and texture-shape processing following adaptation to contours and textures. Contours were made of Gabor strings whose orientations were either tangential or orthogonal to the contour path, while textures were made of a series of contours arranged in parallel. We focused on two ERP components –P1, related to low-level visual processes and N1, broadly indicative of mid-level vision– and, on ERP difference waves (no-adaptor minus with-adaptor) to isolate the effects of adaptation, which are fundamentally distinct from individual processes driving P1 and N1 components. We found that in the absence of adaptation, the N1 component for contour-tests peaked later and increased in amplitude compared to the N1 for texture-tests. Following adaptation, the ERP difference wave for contour-tests revealed an early and a late component that were differentially affected by the presence of surround texture, but critically not by its orientation. For texture-tests, the early component was of opposite polarity for contours compared to texture adaptors. From the temporal sequence of ERP modulations, we conclude that texture processing begins before contour processing and encompasses the stages of perceptual processing reflected in both the low-level P1 and the mid-level N1 vision-related components. Our study provides novel evidence on the nature of separable and temporally distinct texture and contour processing mechanisms, shown in two difference wave components, that highlights the multi-faceted nature of dynamic adaptation to shape when presented in isolation and in context.Numerous data files attached containing : Shape-adaptation studies show that surround textures can inhibit the processing of contours. Using event-related potentials (ERP), we examined the time-course of neural processes involved in contour-shape and texture-shape processing following adaptation to contours and textures. Contours were made of Gabor strings whose orientations were either tangential or orthogonal to the contour path, while textures were made of a series of contours arranged in parallel. We focused on two ERP components –P1, related to low-level visual processes and N1, broadly indicative of mid-level vision– and, on ERP difference waves (no-adaptor minus with-adaptor) to isolate the effects of adaptation, which are fundamentally distinct from individual processes driving P1 and N1 components. We found that in the absence of adaptation, the N1 component for contour-tests peaked later and increased in amplitude compared to the N1 for texture-tests. Following adaptation, the ERP difference wave for contour-tests revealed an early and a late component that were differentially affected by the presence of surround texture, but critically not by its orientation. For texture-tests, the early component was of opposite polarity for contours compared to texture adaptors. From the temporal sequence of ERP modulations, we conclude that texture processing begins before contour processing and encompasses the stages of perceptual processing reflected in both the low-level P1 and the mid-level N1 vision-related components. Our study provides novel evidence on the nature of separable and temporally distinct texture and contour processing mechanisms, shown in two difference wave components, that highlights the multi-faceted nature of dynamic adaptation to shape when presented in isolation and in context.
Maintenance of tropical forest bird communities in human-modified landscapes
No full textExample recordings of avian dawn choruses, to accompany "Rapid assessment of avian species richness and abundance using acoustic indices", accepted for publication in Ecological Indicators, and in University of Stirling thesis chapter. Recordings collected in the Emaprador landscape, Republic of Panama in March and April 2017.Recordings collected during the dawn chorus in the Emparador landscape, Republic of Panama, in March and April 2017. These illustrate soundscape patterns and variable levels of bird song and other noises
Buzz pollination: Integrating bee behaviour and floral evolution
No full textApproximately half of all bee species use vibrations to remove pollen from plants with diverse floral morphologies. In many buzz-pollinated flowers, these mechanical vibrations generated by bees are transmitted through floral tissues, principally pollen-containing anthers, causing pollen to be ejected from small openings (pores or slits) at the tip of the stamen. Despite the importance of substrate-borne vibrations for both bees and plants, few studies to date have characterised the transmission properties of floral vibrations. In this study, we use contactless laser vibrometry to evaluate the transmission of vibrations in the corolla and anthers of buzz- pollinated flowers of Solanum rostratum, and measured vibrations in three spatial axes. We found that floral vibrations conserve their dominant frequency (300Hz) as they are transmitted throughout the flower. We also found that vibrations are generally amplified (up to >400%) as they travel from the receptacle at the base of the flower to other floral structures, and that anthers vibrate with a higher amplitude velocity than petals. Together, these results suggest that vibrations travel differently through floral structures and across different spatial axes. As pollen release is a function of vibration amplitude, we conjecture that bees might benefit from applying vibrations in the axes associated with higher vibration amplification.This dataset contains a series of text (.txt) files corresponding to the vibration data recorded with laser Doppler vibrometry from flowers vibrated by a shaker. The text files contains two columns, one referring to the time in seconds, other referring to the displacement of the floral structure measured. Additionally the R code used to analyse the data is provided as a pdf file and a table with the legends for the variable names used during the analysis is provided as a .csv file. All the files are in a single folder and a .zip file reader software might me be needed to open the folder and extract the files
Elucidating the role of colour in shape processing in human vision
No full textShape-adaptation studies show that surround textures can inhibit the processing of contours. Using event-related potentials (ERP), we examined the time-course of neural processes involved in contour-shape and texture-shape processing following adaptation to contours and textures. Contours were made of Gabor strings whose orientations were either tangential or orthogonal to the contour path, while textures were made of a series of contours arranged in parallel. We found that in the absence of adaptation, the perceptual N1 component for contour-tests peaked later and increased in amplitude compared to the N1 for texture-tests, consistent with previous literature on contour and texture-driven ERPs. Following adaptation, the ERP difference wave (no-adaptor minus with-adaptor conditions) for contour-tests showed two components: an early (70-230 ms) and a late component (250-500 ms) that were differentially affected by the presence of surround-texture adaptor. From the temporal sequence of ERP modulations, we conclude that texture processing begins before contour processing and encompasses the stages of perceptual processing reflected in the earliest components of the visual evoked potential (P1 and N1). Interestingly, our dynamic adaptation paradigm shows two difference-wave components that are differentially modulated by adaptation to contours when presented in isolation (no-surround) and embedded in texture-surround (context). Altogether these findings support the dissociation between contour and texture processing mechanisms in human vision.Grand average ERPs and difference wave. See Readme file for descriptions
Webber & Lee calf scan data
No full textObservational data collected on wild and captive elephant calves during development and used to compare percentage of time spent in play between calves of different ages, sex and wild vs captive conditions. These data have been collected over a long period and are presented as percentage of scans of behaviour.all SCANS.xlsx - Data presented as percentage of scans for elephant calf activities, associated with calf ID, age, sex, locatio
Maintenance of tropical forest bird communities in human-modified landscapes
No full textData used in the Ecological Indicators paper "Rapid assessment of avian species richness and abundance using acoustic indices". Dataset includes acoustic indices values derived from audio recordings collected in the Emparador landscape, Republic of Panama.Data used in the Ecological Indicators paper "Rapid assessment of avian species richness and abundance using acoustic indices". Dataset includes acoustic indices values derived from audio recordings collected in the Emparador landscape, Republic of Panama