Thomas, Oliver Robert; Unsworth, Richard K F (2026): Ecological monitoring data of restored seagrass planted in North Wales between 2023–2025 by Project Seagrass [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.996141 (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 intertidal quadrat survey data recording seagrass shoot and reproductive shoot density, rhizome presence, canopy height, percentage cover of seagrass, epiphytes and algae, and sediment redox potential, pH and temperature, collected during repeated monitoring visits to four restored seagrass sites between June 2023 and October 2025.
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: 53.098919 * Median Longitude: -4.487062 * South-bound Latitude: 52.866446 * West-bound Longitude: -4.587141 * North-bound Latitude: 53.320517 * East-bound Longitude: -4.320823
Date/Time Start: 2023-06-04T00:00:00 * Date/Time End: 2025-10-08T00:00:00
Minimum DEPTH, water: 0 m * Maximum DEPTH, water: 0 m
Event(s):
NWMHWOTRU2026_CYD_monitoring (Carreg y Defaid (CYD)) * Latitude: 52.866446 * Longitude: -4.463013 * Date/Time Start: 2023-06-04T00:00:00 * Date/Time End: 2024-09-18T00:00:00 * Method/Device: Field experiment * Comment: Intertidal zone / mean sea level
NWMHWOTRU2026_PHD_monitoring (Penrhos Headland (PHD)) * Latitude: 53.305035 * Longitude: -4.587141 * Date/Time Start: 2024-10-16T00:00:00 * Date/Time End: 2025-10-06T00:00:00 * Method/Device: Field experiment * Comment: Intertidal zone / mean sea level
NWMHWOTRU2026_PYC_monitoring (Pen-y-Chain (PYC)) * Latitude: 52.903678 * Longitude: -4.320823 * Date/Time Start: 2023-06-05T00:00:00 * Date/Time End: 2024-09-20T00:00:00 * 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 – Date of the monitoring/survey visit | ||
| 9 | Principal investigator | PI | Unsworth, Richard K F | |||
| 10 | Identification | ID | Unsworth, Richard K F | |||
| 11 | Project | Project | Unsworth, Richard K F | |||
| 12 | Site | Site | Unsworth, Richard K F | |||
| 13 | Site index code | Site ind | Unsworth, Richard K F | |||
| 14 | Planting method | Plant method | Unsworth, Richard K F | |||
| 15 | Planted (yes/no) | Planted (y/n) | Unsworth, Richard K F | |||
| 16 | Monitoring identification | Monitoring ID | Unsworth, Richard K F | |||
| 17 | Month | Month | Unsworth, Richard K F | |||
| 18 | Year of observation | Year obs | a AD | Unsworth, Richard K F | ||
| 19 | Monitoring method | Monitor method | Unsworth, Richard K F | |||
| 20 | Sampling strategy | Sampling strat | Unsworth, Richard K F | |||
| 21 | Monitoring area | Monitoring area | m2 | Unsworth, Richard K F | ||
| 22 | Condition | Cond | Unsworth, Richard K F | Intertidal / subtidal | ||
| 23 | Experimental plot | Experimental plot | Unsworth, Richard K F | Plot / transect | ||
| 24 | Zostera marina, shoots | Z. marina shoots | # | Unsworth, Richard K F | Manual quadrat count | Observed |
| 25 | Zostera marina, shoots | Z.marina shoots | #/m2 | Unsworth, Richard K F | Manual quadrat count | |
| 26 | Depth, redox | Depth redox | cm | Unsworth, Richard K F | Ruler stick (RULER) | |
| 27 | Worm casts | Worm casts | # | Unsworth, Richard K F | Manual quadrat count | |
| 28 | Worm casts | Worm casts | #/m2 | Unsworth, Richard K F | Manual quadrat count | |
| 29 | Canopy height | Canopy h | cm | Unsworth, Richard K F | Ruler stick (RULER) | 1 |
| 30 | Canopy height | Canopy h | cm | Unsworth, Richard K F | Ruler stick (RULER) | 2 |
| 31 | Canopy height | Canopy h | cm | Unsworth, Richard K F | Ruler stick (RULER) | 3 |
| 32 | Epiphytes, cover | Epiphytes cov | % | Unsworth, Richard K F | Visual estimation | |
| 33 | Algae, cover | Algae cov | % | Unsworth, Richard K F | Visual estimation | |
| 34 | Blackening | Blackening | % | Unsworth, Richard K F | Visual estimation | |
| 35 | Bleaching | Bleaching | % | Unsworth, Richard K F | Visual estimation | |
| 36 | Oxidation reduction (RedOx) potential | Eh | mV | Unsworth, Richard K F | Multiparameter probe, HANNA Instruments, HI-98191 | Sediment |
| 37 | pH | pH | Unsworth, Richard K F | Multiparameter probe, HANNA Instruments, HI-98191 | Sediment | |
| 38 | Sediment surface temperature | Sed surf temp | °C | Unsworth, Richard K F | Multiparameter probe, HANNA Instruments, HI-98191 | |
| 39 | Lithology/composition/facies | Lithology | Unsworth, Richard K F | |||
| 40 | Sea level, relative | Sea lev rel | m | Unsworth, Richard K F | ||
| 41 | Accuracy, vertical | Accuracy V | cm | Unsworth, Richard K F | Global Positioning System (GPS), Garmin, GPSmap 60 CSx | dGPS |
| 42 | Comment | Comment | Unsworth, Richard K F | |||
| 43 | 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:
6936 data points
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