70 research outputs found
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Marine Benthopelagic Food Webs of the North Sea (1997-2015)
No full textA major barrier to assessing the effects of global change on complex ecosystems is the scarcity of food web observations spanning the spatial and temporal scales needed to reveal significant change. This study hopes to rectify this by presenting 4728 empirical food webs constructed every 50 km across the North Sea annually from 1997-2015. We also present a dynamic, reproducible framework for devising food webs at different spatial or temporal scales by integrating nearly four decades of standardised groundfish survey data with one of the world’s most comprehensive stomach content databases. This time series of spatially resolved food webs should help enrich analyses of environmental change on food web structure and aid reliable benchmarking of ecosystem-based management in one of the world’s most commercially important and anthropogenically influenced continental shelves.
In this repository are final 4728 North Sea food webs , the data needed to construct these food webs as well as the code used to construct the food webs
Warming effects on trout energetic efficiency
No full textData and R code from metabolic and feeding rate experiments conducted across streams of different temperature in the Hengill geothermal valley in Iceland. Fish were collected from one cold and two warm streams in the system and acutely exposed to different experimental temperatures (using the natural temperature gradient of the streams) to measure the mass and temperature dependence of metabolic and feeding rates. Metabolism experiments lasted 2.5 hours and were conducted in situ in 7.2 litre plastic chambers containing a dissolved oxygen probe. Feeding rate experiments lasted approximately 24 hours and were conducted in situ in 250 mm diameter x 300 mm height cylindrical plastic arenas with 20 individuals of the snail Radix balthica or blackfly larvae from the Simuliidae family and a rock for shelter. The energetic efficiency of brown trout was calculated as the dimensionless ratio of feeding rate to metabolic rate. At the end of the experiments, a subset of fin clips were taken for population genetics, with 17 microsatellites genotyped
Increased benthic biodiversity and food web recovery after decommissioning of oil and gas infrastructure
No full textThis dataset used a subset of publicly available UK oil and gas industry benthic monitoring database (UK Benthos database: https://oeuk.org.uk/). A total of 17 structures were eligible to assess decommissioning effects. For each structure, there were biological and chemical samples collected before and after decommissioning or at two different time points post-decommissioning
Green Instructions: Intelligent Lighting via Real-Time Chlorophyll Fluorescence Feedback: Enhancing Yield and Energy Efficiency in Controlled Environment Agriculture
No full textData for the above paper published in Smart Agricultural Technolog
Apple hyperspectral images and maturity data.
No full textA large and diverse collection of 3636 hyperspectral images of 5756 apple samples from 3 seasons, 6 cultivars and 2 countries and their associated brix, firmness and starch data.
Some models trained on this dat
Cow space use, activity, and THI
No full textLocal positioning system (LPS) sensors were deployed on indoor dairy cows (c100) to track their location and activity. The sensors continuously recorded locations every 8 seconds and activity every 10 minutes. Temperature-humidity index (THI) was also continuously recorded around the barn every 10 minutes (from n = 16 temperature-only sensors and n = 20 humidity sensors).
From these recordings, various metrics were calculated: mean time spent near key resources and in the feeding zone, mean and variance in activity, mean z value (recorded from the LPS), mean distance travelled during high activity, and the mean and variance of four bunching metrics (range size, inter-cow distance and nearest neighbour distance). These summary metrics are provided for each four-hour time period throughout the study duration
Data for Unravelling the Physiological and Anatomical Basis of Divergent Adaptations in Cultivated and Wild Tomatoes (published in the Journal of Experimental Botany, https://doi.org/10.1093/jxb/eraf390).
No full textRaw data and read me file for the following paper in the Journal of Experimental Botany
Unravelling the Physiological and Anatomical Basis of Divergent Adaptations in Cultivated and Wild Tomatoes
Showkat A. Ganie, Guillaume Forget, Joanna Amaral, Shellie A. Wall, Pallavi Singh, Johannes Kromdijk, Elizabete Carmo-Silva Tracy Lawson
https://doi.org/10.1093/jxb/eraf39
Commercial fishing amplifies impacts of increasing temperature on predator-prey interactions in marine ecosystems.
No full textObservations of PPMR were taken from the Dapstom stomach content database (ICES 1997; Daan 1981; Pinnegar 2019). We utilised a total of 313,953 individual observations from 53,444 individual stomachs of 88 unique predator species. These observations were made on 1,862 different research hauls across the Northeast Atlantic (44° N to 79.5 ° N and 28.5 E° to 41.9° W) from 1981 to 2016. Predators were always identified to species level, with prey identified to the highest possible taxonomic level, i.e. species where possible, but often to family level. All prey species were considered (i.e. both fish and invertebrates). Fullness of stomach or level of digestibility were not considered and so the estimates of body mass may be subject to some associated uncertainty. Additional variables taken from the database included the prey abundance per predator stomach (prey count), the geographical coordinates, and the year and month each sample was collected. These variables were included in the study as any change in PPMR can be driven by multiple and not mutually exclusive processes, e.g. changes in predator body size, prey body size, predator behaviour to select different sized prey, or the behaviour of prey to avoid predation based on their body size.
This data was then joined to daily sea surface temperature (SST) data (°C) from both satellite and in situ observations were extracted from the Copernicus open access data repository (Good et al., 2020). The spatial resolution of the temperature data was 0.05° longitude x 0.05° latitude and covered every month from 1981 to 2016. The average temperature (°C) was calculated per month and matched to PPMR data sampled in the following month to account for any lag effects (i.e. if a predator’s stomach contents were sampled in May 1992, then the corresponding temperature would be the monthly average of April 1992). Other environmental variables used for modelling purposes included salinity, chlorophyll (ug/l), and the average water column depth (m), which were taken from the ICES open-source data portal (ICES Data Portal, Dataset on Ocean HydroChemistry, Extracted June 12, 2023. ICES, Copenhagen). The mean of each environmental variable was calculated for each month of every year (1981–2016) and matched to the following month of PPMR data, as described for temperature. The longitude and latitude coordinates were to four decimal points. Due to spatiotemporal limitations in the environmental data layers available, 43 % of PPMR observations did not have corresponding salinity or chlorophyll data.
The data was then joined to commercial fishing effort dataset. We make use of The Scientific, Technical and Economic Committee for Fisheries (STECF) trawling effort dataset because of its extensive coverage in space and time which corresponded with our PPMR observations (STECF, 2017). The STECF data provides annual fishing hours per ICES rectangle (0.5° latitude by 1° longitude) across areas of the Northeast Atlantic. We downloaded the data for the region 49.25° N to 63.25° N and 7.5° W to 12.5° E, covering the period 2002 to 2022. The data is a compilation of member state submissions in response to the Data Collection Framework (DCF) Fishing Effort Regimes Data Call in 2013 88. The STECF dataset used in this study included data from Belgium, Denmark, Netherlands, United Kingdom, France, Germany, and Sweden. Fishing effort was matched to the PPMR observations based on the year and ICES rectangle in which the sampling took place. This resulted in 131,767 PPMR observations in the Northeast Atlantic from 2002-2016 with a corresponding measure of fishing effort in hours per year (Fig. 1c).
References:
Daan N. Data base report of the stomach sampling project 1981. International Council for the Exploration of the Sea (1989).
Good S, et al. The current configuration of the OSTIA system for operational production of foundation sea surface temperature and ice concentration analyses. Remote Sensing 12, 720 (2020).
ICES. Database report of the stomach sampling project 1991 (Issue 219). . (ed Sea ICftEot) (1997).
Pinnegar JK. DAPSTOM—An integrated database & portal for fish stomach records. (ed Centre for Environment FAS). 5.5 edn (2019)
Cattle GPS locations, activity and temperature
No full textCommercial Global Positioning System (GPS) sensors were deployed on three outdoor cattle to track their location and activity. The sensors recorded locations every 15 minutes when the animals were active and the update rate was reduced when the animals were not active to conserve battery. Activity index was measured by a dynamometer embedded in the cow-equipped sensors, where each movement along the heave axis over a half-hour period incremented the count by one. Additionally, the sensors recorded temperature every half an hour.
Please note that this dataset is linked to the dataset 'Cattle grazing observations', doi: 10.5526/erdr-00000216
Native Oyster and associated biodiversity survey data 2016-2018 Blackwater Crouch Roach and Colne MCZ (UoE/KEIFCA)
No full textThe data set contains the results of abundance of native European flat oyster, rock oyster and other associated marine species in survey dredges collected in the BCRC MCZ by Alice Lown working alongside Kent and Essex Inshore Fisheries and Conservation Authority in 2026, 2017 and 2018. These data are now published in several manuscripts and Alice's PhD thesis