Thomas, Oliver Robert; Unsworth, Richard K F (2026): Ecological planting record data of restored seagrass planted in North Wales between 2023–2024 by Project Seagrass [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.996142 (DOI registration in progress), In: Thomas, OR; Unsworth, RKF (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 dataset was collected 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). It provides plot-level planting records for seagrass planted at four intertidal sites along the Llŷn Peninsula and Ynys Môn between February 2023 and March 2024, including planting method (directly injected seeds, hessian bags, and seed balls), planting date, number of seeds, seed balls and hessian bags planted per plot, and dGPS-surveyed plot coordinates.
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
Project(s):
Funding:
Coverage:
Median Latitude: 52.888509 * Median Longitude: -4.378752 * South-bound Latitude: 52.866130 * West-bound Longitude: -4.463447 * North-bound Latitude: 52.904841 * East-bound Longitude: -4.319451
Date/Time Start: 2023-02-20T00:00:00 * Date/Time End: 2024-04-08T00:00:00
Minimum DEPTH, water: 0 m * Maximum DEPTH, water: 0 m
Event(s):
NWMHWOTRU2026_CYD_seeding (Carreg y Defaid (CYD)) * Latitude: 52.866446 * Longitude: -4.463013 * Date/Time Start: 2023-02-20T00:00:00 * Date/Time End: 2024-03-13T00:00:00 * Method/Device: Field experiment * Comment: Intertidal zone / mean sea level
NWMHWOTRU2026_PHD_seeding (Penrhos Headland (PHD)) * Latitude: 53.305035 * Longitude: -4.587141 * Date/Time: 2024-04-07T00:00:00 * Method/Device: Field experiment * Comment: Intertidal zone / mean sea level
NWMHWOTRU2026_PYC_seeding (Pen-y-Chain (PYC)) * Latitude: 52.903678 * Longitude: -4.320823 * Date/Time Start: 2023-02-21T00:00:00 * Date/Time End: 2024-03-10T00:00:00 * Method/Device: Field experiment * Comment: Merged Pen-y-Chain site (former East/West plots); midpoint coordinate; intertidal zone / mean sea level
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | Unsworth, Richard K F | |||
| 2 | Latitude of event | Latitude | Unsworth, Richard K F | |||
| 3 | Longitude of event | Longitude | Unsworth, Richard K F | |||
| 4 | Date/Time of event | Date/Time | Unsworth, Richard K F | |||
| 5 | Date/Time of event 2 | Date/Time 2 | Unsworth, Richard K F | |||
| 6 | Type of study | Study type | Unsworth, Richard K F | |||
| 7 | DEPTH, water | Depth water | m | Unsworth, Richard K F | Geocode | |
| 8 | DATE/TIME | Date/Time | Unsworth, Richard K F | Geocode – Planting Date (date the seagrass was planted) | ||
| 9 | Identification | ID | Unsworth, Richard K F | |||
| 10 | Project | Project | Unsworth, Richard K F | |||
| 11 | Site | Site | Unsworth, Richard K F | |||
| 12 | Site index code | Site ind | Unsworth, Richard K F | |||
| 13 | Area/locality | Area | Unsworth, Richard K F | Region | ||
| 14 | Planting method | Plant method | Unsworth, Richard K F | |||
| 15 | Date/time start, experiment | Date/time start exp | Unsworth, Richard K F | Planting Date | ||
| 16 | Year of observation | Year obs | a AD | Unsworth, Richard K F | ||
| 17 | Species, unique identification (Semantic URI) | Species UID (Semantic URI) | Unsworth, Richard K F | |||
| 18 | Species, unique identification (URI) | Species UID (URI) | Unsworth, Richard K F | |||
| 19 | Species, unique identification | Species UID | Unsworth, Richard K F | |||
| 20 | Condition | Cond | Unsworth, Richard K F | Intertidal / subtidal | ||
| 21 | Sediment type | Sediment | Unsworth, Richard K F | |||
| 22 | Experimental plot | Experimental plot | Unsworth, Richard K F | Plot / transect | ||
| 23 | Distance, shore to sea | Dist shore sea | m | Unsworth, Richard K F | Plot dimensions (shore-to-sea) planted area: 1 m² quadrat | |
| 24 | Distance, parallel to sea | Dist parallel sea | m | Unsworth, Richard K F | Plot dimensions (parallel to sea), planted area: 1 m² quadrat | |
| 25 | Planted area | Planted area | m2 | Unsworth, Richard K F | ||
| 26 | Zostera marina, seeds | Z. marina seeds | #/m2 | Unsworth, Richard K F | Targeted | |
| 27 | Zostera marina, seeds | Z. marina seeds | #/m2 | Unsworth, Richard K F | Planted by hand | |
| 28 | Zostera marina, seeds per plot | Z. marina seeds plot | # | Unsworth, Richard K F | Planted by hand | |
| 29 | Zostera marina, seed balls per plot | Z. marina seed balls plot | # | Unsworth, Richard K F | Manual count/volume measure during planting | |
| 30 | Zostera marina, hessian bags per plot | Z. marina hessian bags plot | # | Unsworth, Richard K F | Manual count/volume measure during planting | |
| 31 | Sample comment | Sample comment | Unsworth, Richard K F | Coordinate Description | ||
| 32 | Easting, local | East local | m | Unsworth, Richard K F | Differential Global Positioning System (DGPS), Trimble DA2 | Individual dGPS-coordinates recorded per plot/point at the time of planting. |
| 33 | Northing, local | North local | m | Unsworth, Richard K F | Differential Global Positioning System (DGPS), Trimble DA2 | Individual dGPS-coordinates recorded per plot/point at the time of planting. |
| 34 | LATITUDE | Latitude | Unsworth, Richard K F | Differential Global Positioning System (DGPS), Trimble DA2 | Geocode – Individual dGPS-coordinates recorded per plot/point at the time of planting. | |
| 35 | LONGITUDE | Longitude | Unsworth, Richard K F | Differential Global Positioning System (DGPS), Trimble DA2 | Geocode – Individual dGPS-coordinates recorded per plot/point at the time of planting. | |
| 36 | Sea level, relative | Sea lev rel | m | Unsworth, Richard K F | Differential Global Positioning System (DGPS), Trimble DA2 | During planting |
| 37 | Accuracy, vertical | Accuracy V | cm | Unsworth, Richard K F | Differential Global Positioning System (DGPS), Trimble DA2 | dGPS during planting |
| 38 | Accuracy, horizontal | Accuracy H | cm | Unsworth, Richard K F | Differential Global Positioning System (DGPS), Trimble DA2 | dGPS during planting |
| 39 | Investigator | Investigator | Unsworth, Richard K F | Planter | ||
| 40 | Comment | Comment | Unsworth, Richard K F | |||
| 41 | Monitoring reference database | Monitoring DB | Unsworth, Richard K F |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
2975 data points
Download Data
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