The data resource collates novel measurements of the rhenium isotope geochemistry of various materials measured between 2019 and 2024. The data were collected as part of NERC funded research (NE/T001119) aiming to constrain the behavior of the rhenium isotope system at Earth's surface. Sampling, analyses and data collation were undertaken at Royal Holloway, Durham University and the University of Oxford. The main outputs include: Table 1 - Measurements of Icelandic groundwaters and hydrothermal systems, samples collected in September 2021 from locations around Iceland, and analysed 2021-2023. Table 2 - Measurements on multiple shale weathering profiles from sites across the USA, New Zealand, collected in the 1990s (USA) and 2018 (New Zealand), and measured between 2020-2022. Table 3 - Rhenium isotope measurements on the Eagle Ford Shale, USA, collected in the 2010s and analysed between 2021-2024. Table 4 - Rhenium elemental and isotopic measurements in igneous rocks from Iceland (Helka magmatic evolution sequence collected in the 2000s and 2010s) and Mid-Ocean Ridge in Atlantic, Indian and Pacific Oceans and analysed in 2019-2024. Table 5 - Rhenium isotopes in river sediments and river waters of the northern Mackenzie River basin, Canada, delta region, including Peel and Arctic Red Rivers. Materials were collected between 2017 and 2018 and analysed in 2019. Table 6 - Rhenium isotope measurements on Jurassic aged sedimentary rocks from the MOCHRAS core. Materials were processed and analysed between 2022 and 2025. Together, these data provide a step change in our understanding of the rhenium isotope system and how it can be applied to understand pressing environmental science questions. Full details about this dataset can be found at https://doi.org/10.5285/a9bc6c28-cee5-4bf9-8539-d112c0a4c3d4

The dataset contains stable isotope data from surface and groundwater samples collected in the Gandak Basin, north India. The data was collected between March 2017 and February 2019. These measurements were taken to improve understanding of surface and subsurface water interconnections and movement through river and canal networks and underlying aquifers. The data were collected as part of the NERC sponsored project Coupled Human and Natural Systems Environment (CHANSE), grant number NE/N01670X/1 Full details about this dataset can be found at https://doi.org/10.5285/09ae86d6-896f-430f-aab4-c5b46c265213

Data comprise methane and carbon dioxide concentrations in soil following injection of discrete pulses of methane into subsoil (50 cm depth) below a spring wheat crop during the growing season. Supporting data on soil moisture, soil temperature and meteorology are provided. The data may be useful for testing models of methane and carbon dioxide transport and fate in temperate agricultural soils. Full details about this dataset can be found at https://doi.org/10.5285/18939865-d863-498b-b4cb-5661eaeadcfc

This dataset presents both isotopic and elemental data for a series of cation exchange experiments between mineral water, montmorillonite clay and seawater. These were a series of in-house experiments to determine isotopic fractionation and elemental distribution coefficients (if any) as the exchange pool switched from mineral water rich to seawater rich. Full details about this dataset can be found at https://doi.org/10.5285/8db593bf-cdc9-4256-ac28-e002814d636d

A dataset of historical sediment Carbon and Nitrogen isotope measurements from lake cores (n=95) spanning the range of lake types and catchments found across the UK. These data have been obtained from the Environmental Change Research Centre (ECRC) lake sediment core archive with well-resolved time intervals (1850, 1900, 1980 and present) determined by radiometric dating (210Pb; 137Cs). This data has been collated to investigate historical sources and accumulation of C and N in lakes. This dataset provides historical data for hydrological / nutrient modelling from the Long Term Large Scale (LTLS) Project in the NERC Macronutrients programme. Full details about this dataset can be found at https://doi.org/10.5285/4b53b1d7-f290-4b47-97e9-9f9ec79f3003

This dataset contains the concentrations of Ni, Cu, Zn, Cd and Pb, extracted from four soils, using the chemical extractants: 0.43 M HNO3, 0.43 M CH3COOH, 1 M CaCl2 and 0.05 M Na2H2EDTA (MExt mg/kg). The concentrations of isotopically exchangeable (labile) Ni, Cu, Zn, Cd and Pb (EValue mg/kg) are also given. Additionally, the concentrations of isotopically exchangeable soil metal, measured when the soils when suspended in each of the above extractants (EExt mg/kg), are presented. Full details about this dataset can be found at https://doi.org/10.5285/4ecdb4b3-3af6-4c92-abbb-20a330be398b

This dataset comprises the delta-13C and delta-15N stable isotopic information from two tissue samples (whole blood and mantle feathers) from 16 adults of 8 species of Southern Ocean procellariform collected at Bird Island, South Georgia during the austral summer 2001-2002. There have been numerous long-term research projects carried out at Bird Island under the auspices of the British Antarctic Survey, and this data represents one very small component that has been used to examine inter-specific competition in both the breeding and non-breeding periods. Full details about this dataset can be found at https://doi.org/10.5285/d2c301d4-8a77-4571-9667-01168356a2d3

The dataset contains a key to species and locations of moss samples and water samples collected along with relative water contents for moss samples. The stable carbon (13C/12C) and oxygen (18O/17O) composition of cellulose is presented, along with the stable oxygen (18O/17O) and hydrogen (2H/1H) isotope compositions of fresh water and water samples distilled from moss tissue. Full details about this dataset can be found at https://doi.org/10.5285/1e57032c-327a-49c7-bb2e-43921dc116e2

The data consist of leaf extension rates of seagrass growth as the primary response variable; elemental and isotopic compositions of seagrass above- and below-ground biomass; seagrass morphological parameters; site-characterisation environmental parameters and temperature recorded over the experimental windows. This dataset contains in-situ experimental information relating two separate nutrient enrichment experiments that were conducted in January/February 2022 and January 2023 over 2-week periods. The experiments were designed to understand the growth response of seagrass to elevated nutrient concentrations relative to controls plots. We used agricultural fertilisers to elevate local concentrations. In 2022, we used a slow-release fertiliser and compared growth response rates at two contrasting site types with 3 treatment levels (Control, Low N and High N). In 2023, we used an all-purpose granular fertiliser, the same 3 treatment levels but varied how the fertiliser was delivered to the seagrass, i.e., water-column diffusion vs below-ground diffusion. Both experiments were conducted on the same island of Gan, in Laamu atoll, Maldives. The work has been undertaken has been funded by the GCRF-UKRI South Asian Nitrogen Hub and enabled through the University of Edinburgh and Maldivian non-governmental organisation, Maldives Resilient Reefs. Full details about this dataset can be found at https://doi.org/10.5285/8760a6d4-b9df-406d-b910-678ab0f6557f

This dataset contains biogeochemical measurements of surface water, sampled across Loch Etive, Scotland, between the 3rd and 7th of October 2022. The dataset encompasses 23 locations including nine open loch stations, four fish-farm adjacent loch sites, six river inflows, and four process experiment river sites, enabling a comparison of water chemistry across marine, freshwater, and anthropogenically influenced environments. Surface water samples were collected and analysed for an extensive range of biogeochemical parameters. In-field measurements included water temperature, pH, dissolved oxygen, and specific conductivity. Laboratory analyses comprised: - Alkalinity - Major nutrients, including nitrate, nitrite, ammonium, soluble reactive phosphorus (SRP), and silica - Dissolved and total organic and inorganic carbon and nitrogen (DOC, TIC, TDN) - Trace elements and rare earth elements (REEs), including lithium, barium, aluminium, and a full suite of lanthanides - Stable isotope composition of oxygen (δ18O), determined via isotope ratio mass spectrometry - Chromophoric and fluorescent dissolved organic matter (CDOM/FDOM), with derived indices such as fluorescence index (FI), biological index (BIX), and humification index (HIX) In addition to water chemistry, particulate samples were collected and analysed for total suspended solids (TSS), particulate organic matter (POM), particulate inorganic matter (PIM), chlorophyll-a concentration, and particulate organic carbon/nitrogen (POC/PON). Phytoplankton community composition was assessed by flow cytometry, quantifying major groups including diatoms, pico- and nano-chlorophytes, cryptophytes, and cyanobacteria. This comprehensive dataset is intended to inform biogeochemical process understanding in polar analogue environments and to validate analytical workflows and inter-institutional protocols. Full details about this dataset can be found at https://doi.org/10.5285/50f4344e-a79a-4e1f-a9ee-e7985ed847cd