PANGAEA_996148 Spatial, Light, Temperature and Seagrass Planting and Monitoring record data from North Wales 2023-2024 Thomas, Oliver Robert; Unsworth, Richard K F Spatial, Light, Temperature and Seagrass Planting and Monitoring record data from North Wales 2023-2024 2026-07-24 PANGAEA Dataset https://doi.pangaea.de/10.1594/PANGAEA.996148 Earth Science geoscientificInformation Field experiment In-situ Monitoring restoration 2023-02-20 2025-10-08 Complete 52.86612995 53.320517 -4.587140999999974 -4.319450833000019 SORNW Seagrass Ocean Rescue North Wales unrestricted CC-BY-4.0: Creative Commons Attribution 4.0 International English PANGAEA Data Publisher for Earth & Environmental Science https://www.pangaea.de/ Data Center Contact Michael Diepenbroek info@pangaea.de

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Bremen Bremen 28359 Germany online 5 datasets application/zip 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 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

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. ** For all details see the full metadata description at "https://doi.pangaea.de/10.1594/PANGAEA.996148"!

https://doi.org/10.1088/1748-9326/ae6d17 Marine heat waves endanger the rebuilding of marine life https://doi.org/10.48670/MOI-00054 Atlantic - European North West Shelf - Ocean Physics Analysis and Forecast https://doi.org/10.48670/MOI-00055 Atlantic - European North West Shelf - Ocean Wave Analysis and Forecast https://www.wwf.org.uk/what-we-do/projects/north-wales-seagrass-ocean-rescue SORNW DIF 9.4 2026-07-24 2026-07-24