Thomas, Oliver Robert; Unsworth, Richard K F (2026): Spatial, Light, Temperature and Seagrass Planting and Monitoring record data from North Wales 2023-2024 [dataset bundled publication]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.996148 (DOI registration in progress)
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Published: 2026-07-24
Abstract:
This data package contains restoration, monitoring and in-situ environmental data collected between February 2023 and October 2025 in support of a study on the resilience of restored seagrass (Zostera marina) meadows to marine heatwave exposure in North Wales, United Kingdom (Thomas et al., 2026). Seagrass was planted at four intertidal sites along the Llŷn Peninsula and Ynys Môn using directly injected seeds, hessian bags and seed balls; planting locations were surveyed with a differential Global Positioning System (dGPS) receiver, producing spatial point and polygon records of the planted areas. Restoration success was subsequently assessed through repeated intertidal quadrat surveys recording shoot and reproductive shoot density, rhizome presence, canopy height, percentage cover of seagrass, epiphytes and algae, and sediment redox potential, pH and temperature, measured using a portable multiparameter meter. In-situ seawater/intertidal temperature and light intensity were additionally recorded at 30-minute intervals over one month in May 2024 using a fixed temperature/light data logger. These restoration and monitoring records were combined with satellite-derived sea surface temperature and marine heatwave indicator data from the E.U. Copernicus Marine Service (doi:10.48670/moi-00054, doi:10.48670/moi-00055) to evaluate how marine heatwave exposure affected the establishment and persistence of a restored seagrass meadow. The package comprises four data types - in-situ light and temperature logger data, spatial point and polygon data of planting locations, seagrass planting records, and seagrass monitoring records - each published here as an individual dataset.
Related to:
Thomas, Oliver Robert; Patterson, Bridget M; Rowland, Caroline; Berthou, Ségolène; Worsfold, Mark; Yates, Emily; Keen, Charlotte; den Haan, Stijn; Unsworth, Richard K F (2026): Marine heat waves endanger the rebuilding of marine life. Environmental Research Letters, 21(10), 104019, https://doi.org/10.1088/1748-9326/ae6d17
References:
Atlantic - European North West Shelf - Ocean Physics Analysis and Forecast (2018). Mercator Ocean International, https://doi.org/10.48670/MOI-00054
Atlantic - European North West Shelf - Ocean Wave Analysis and Forecast (2019). Mercator Ocean International, https://doi.org/10.48670/MOI-00055
Project(s):
Funding:
Coverage:
Median Latitude: 52.950482 * Median Longitude: -4.446425 * South-bound Latitude: 52.866130 * West-bound Longitude: -4.587141 * North-bound Latitude: 53.320517 * East-bound Longitude: -4.319451
Date/Time Start: 2023-02-20T00:00:00 * Date/Time End: 2025-10-08T00:00:00
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Size:
5 datasets
Download Data
Datasets listed in this bundled publication
- Thomas, OR; Unsworth, RKF (2026): Ecological planting record data of restored seagrass planted in North Wales between 2023–2024 by Project Seagrass. https://doi.pangaea.de/10.1594/PANGAEA.996142
- Thomas, OR; Unsworth, RKF (2026): Ecological monitoring data of restored seagrass planted in North Wales between 2023–2025 by Project Seagrass. https://doi.pangaea.de/10.1594/PANGAEA.996141
- Thomas, OR; Unsworth, RKF (2026): Light and temperature condition in North Wales between 2023–2024 by Project Seagrass. https://doi.pangaea.de/10.1594/PANGAEA.996143
- Thomas, OR; Unsworth, RKF (2026): Spatial (point) data of restored seagrass planted in North Wales between 2023–2024 by Project Seagrass. https://doi.pangaea.de/10.1594/PANGAEA.996146
- Thomas, OR; Unsworth, RKF (2026): Spatial (polygon) data of restored seagrass planted in North Wales between 2023–2024 by Project Seagrass. https://doi.pangaea.de/10.1594/PANGAEA.996144