Thomas Oliver Robert ollie@projectseagrass.org 0009-0000-1636-9492 Unsworth Richard K F r.k.f.unsworth@swansea.ac.uk Swansea University https://www.swansea.ac.uk https://ror.org/053fq8t95 2026 Ecological planting record data of restored seagrass planted in North Wales between 2023–2024 by Project Seagrass dataset https://doi.pangaea.de/10.1594/PANGAEA.996142 2026-07-24T12:14:17 https://doi.pangaea.de/10.1594/PANGAEA.996148 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. Thomas Oliver Robert ollie@projectseagrass.org 0009-0000-1636-9492 Patterson Bridget M 0009-0000-8621-2247 Rowland Caroline Berthou Ségolène 0000-0002-9164-0841 Worsfold Mark 0000-0003-0722-4456 Yates Emily 0009-0000-0776-4466 Keen Charlotte den Haan Stijn Unsworth Richard K F r.k.f.unsworth@swansea.ac.uk 2026 Marine heat waves endanger the rebuilding of marine life journal article Environmental Research Letters 21(10) https://doi.org/10.1088/1748-9326/ae6d17 104019 -4.4634467 -4.319450833 52.86612995 52.90484139 -4.3787520398703705 52.88850949425927 2023-02-20T00:00:00 2024-04-08T00:00:00 0.0 0.0 time series SORNW Seagrass Ocean Rescue North Wales https://www.wwf.org.uk/what-we-do/projects/north-wales-seagrass-ocean-rescue World Wide Fund for Nature International WWF http://www.wwf.org/ https://ror.org/001pprn90 Natural Environment Research Council NERC http://www.nerc.ac.uk/ https://doi.org/10.13039/501100000270 NE/V016385/1 The National Lottery Heritage Fund HLF https://www.heritagefund.org.uk/ https://doi.org/10.13039/501100016135 NL-21-00035 NWMHWOTRU2026_CYD_seeding Carreg y Defaid (CYD) 52.866446 -4.463013 2023-02-20T00:00:00 2024-03-13T00:00:00 Field experiment Intertidal zone / mean sea level NWMHWOTRU2026_PHD_seeding Penrhos Headland (PHD) 53.305035 -4.587141 2024-04-07T00:00:00 Field experiment Intertidal zone / mean sea level NWMHWOTRU2026_PYC_seeding Pen-y-Chain (PYC) 52.903678 -4.320823 2023-02-21T00:00:00 2024-03-10T00:00:00 Field experiment Merged Pen-y-Chain site (former East/West plots); midpoint coordinate; intertidal zone / mean sea level NWMHWOTRU2026_PYN_seeding Penrhyn (PYN) 53.320517 -4.577271 2024-04-08T00:00:00 Field experiment Intertidal zone / mean sea level 2975 CC-BY-4.0 Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/ Event label Event Unsworth Richard K F r.k.f.unsworth@swansea.ac.uk Event Latitude of event Latitude Unsworth Richard K F r.k.f.unsworth@swansea.ac.uk Latitude Longitude of event Longitude Unsworth Richard K F r.k.f.unsworth@swansea.ac.uk Longitude Date/Time of event Date/Time Unsworth Richard K F r.k.f.unsworth@swansea.ac.uk Date/Time Date/Time of event 2 Date/Time 2 Unsworth Richard K F r.k.f.unsworth@swansea.ac.uk Date/Time 2 Type of study Study type type Unsworth Richard K F r.k.f.unsworth@swansea.ac.uk Study type DEPTH, water Depth water m depth http://purl.obolibrary.org/obo/PATO_0001595 water http://purl.obolibrary.org/obo/CHEBI_15377 Length L http://dbpedia.org/resource/Length Unsworth Richard K F r.k.f.unsworth@swansea.ac.uk Depth water [m] DATE/TIME Date/Time http://en.wikipedia.org/wiki/ISO_8601 Time T http://dbpedia.org/resource/Time Unsworth Richard K F r.k.f.unsworth@swansea.ac.uk Planting Date (date the seagrass was planted) Date/Time (Planting Date (date the seagr...) Identification ID Unsworth Richard K F r.k.f.unsworth@swansea.ac.uk ID Project Project Unsworth Richard K F r.k.f.unsworth@swansea.ac.uk Project Site Site site Unsworth Richard K F r.k.f.unsworth@swansea.ac.uk Site Site index code Site ind Unsworth Richard K F r.k.f.unsworth@swansea.ac.uk Site ind Area/locality Area Area http://dbpedia.org/resource/Area Unsworth Richard K F r.k.f.unsworth@swansea.ac.uk Region Area (Region) Planting method Plant method Unsworth Richard K F r.k.f.unsworth@swansea.ac.uk Plant method Date/time start, experiment Date/time start exp Unsworth Richard K F r.k.f.unsworth@swansea.ac.uk Planting Date Date/time start exp (Planting Date) Year of observation Year obs a AD year Time T http://dbpedia.org/resource/Time Unsworth Richard K F r.k.f.unsworth@swansea.ac.uk Year obs [a AD] Species, unique identification (Semantic URI) Species UID (Semantic URI) species Unsworth Richard K F r.k.f.unsworth@swansea.ac.uk Species UID (Semantic URI) Species, unique identification (URI) Species UID (URI) species Unsworth Richard K F r.k.f.unsworth@swansea.ac.uk Species UID (URI) Species, unique identification Species UID species Unsworth Richard K F r.k.f.unsworth@swansea.ac.uk Species UID Condition Cond Unsworth Richard K F r.k.f.unsworth@swansea.ac.uk Intertidal / subtidal Cond (Intertidal / subtidal) Sediment type Sediment sediment http://purl.obolibrary.org/obo/ENVO_00002007 Unsworth Richard K F r.k.f.unsworth@swansea.ac.uk Sediment Experimental plot Experimental plot Unsworth Richard K F r.k.f.unsworth@swansea.ac.uk Plot / transect Experimental plot (Plot / transect) Distance, shore to sea Dist shore sea m distance http://purl.obolibrary.org/obo/PATO_0000040 shore http://purl.obolibrary.org/obo/ENVO_00000304 sea http://purl.obolibrary.org/obo/ENVO_00000016 Length L http://dbpedia.org/resource/Length Unsworth Richard K F r.k.f.unsworth@swansea.ac.uk Plot dimensions (shore-to-sea) planted area: 1 m² quadrat Dist shore sea [m] (Plot dimensions (shore-to-sea...) Distance, parallel to sea Dist parallel sea m distance http://purl.obolibrary.org/obo/PATO_0000040 sea http://purl.obolibrary.org/obo/ENVO_00000016 Length L http://dbpedia.org/resource/Length Unsworth Richard K F r.k.f.unsworth@swansea.ac.uk Plot dimensions (parallel to sea), planted area: 1 m² quadrat Dist parallel sea [m] (Plot dimensions (parallel to ...) Planted area Planted area m**2 Area http://dbpedia.org/resource/Area Unsworth Richard K F r.k.f.unsworth@swansea.ac.uk Planted area [m**2] Zostera marina, seeds Z. marina seeds #/m**2 Zostera marina https://www.marinespecies.org/aphia.php?p=taxdetails&id=495077 Individual Density Unsworth Richard K F r.k.f.unsworth@swansea.ac.uk Targeted Z. marina seeds [#/m**2] (Targeted) Zostera marina, seeds Z. marina seeds #/m**2 Zostera marina https://www.marinespecies.org/aphia.php?p=taxdetails&id=495077 Individual Density Planted by hand Unsworth Richard K F r.k.f.unsworth@swansea.ac.uk Z. marina seeds [#/m**2] (Planted by hand) Zostera marina, seeds per plot Z. marina seeds plot # Zostera marina https://www.marinespecies.org/aphia.php?p=taxdetails&id=495077 Abundance or Count Planted by hand Unsworth Richard K F r.k.f.unsworth@swansea.ac.uk Z. marina seeds plot [#] (Planted by hand) Zostera marina, seed balls per plot Z. marina seed balls plot # Zostera marina https://www.marinespecies.org/aphia.php?p=taxdetails&id=495077 Abundance or Count Unsworth Richard K F r.k.f.unsworth@swansea.ac.uk Manual count/volume measure during planting Z. marina seed balls plot [#] (Manual count/volume measure d...) Zostera marina, hessian bags per plot Z. marina hessian bags plot # Zostera marina https://www.marinespecies.org/aphia.php?p=taxdetails&id=495077 Abundance or Count Unsworth Richard K F r.k.f.unsworth@swansea.ac.uk Manual count/volume measure during planting Z. marina hessian bags plot [#] (Manual count/volume measure d...) Sample comment Sample comment Unsworth Richard K F r.k.f.unsworth@swansea.ac.uk Coordinate Description Sample comment (Coordinate Description) Easting, local East local m Length L http://dbpedia.org/resource/Length Differential Global Positioning System (DGPS), Trimble DA2 Unsworth Richard K F r.k.f.unsworth@swansea.ac.uk Individual dGPS-coordinates recorded per plot/point at the time of planting. East local [m] (Individual dGPS-coordinates r...) Northing, local North local m Length L http://dbpedia.org/resource/Length Differential Global Positioning System (DGPS), Trimble DA2 Unsworth Richard K F r.k.f.unsworth@swansea.ac.uk Individual dGPS-coordinates recorded per plot/point at the time of planting. North local [m] (Individual dGPS-coordinates r...) LATITUDE Latitude http://en.wikipedia.org/wiki/ISO_6709 Differential Global Positioning System (DGPS), Trimble DA2 Unsworth Richard K F r.k.f.unsworth@swansea.ac.uk Individual dGPS-coordinates recorded per plot/point at the time of planting. Latitude (Individual dGPS-coordinates r...) LONGITUDE Longitude http://en.wikipedia.org/wiki/ISO_6709 Differential Global Positioning System (DGPS), Trimble DA2 Unsworth Richard K F r.k.f.unsworth@swansea.ac.uk Individual dGPS-coordinates recorded per plot/point at the time of planting. Longitude (Individual dGPS-coordinates r...) Sea level, relative Sea lev rel m relative Length L http://dbpedia.org/resource/Length Differential Global Positioning System (DGPS), Trimble DA2 Unsworth Richard K F r.k.f.unsworth@swansea.ac.uk During planting Sea lev rel [m] (During planting, Differential...) Accuracy, vertical Accuracy V cm vertical http://purl.obolibrary.org/obo/PATO_0001854 Length L http://dbpedia.org/resource/Length Differential Global Positioning System (DGPS), Trimble DA2 Unsworth Richard K F r.k.f.unsworth@swansea.ac.uk dGPS during planting Accuracy V [cm] (dGPS during planting, Differe...) Accuracy, horizontal Accuracy H cm horizontal http://purl.obolibrary.org/obo/PATO_0001855 Length L http://dbpedia.org/resource/Length Differential Global Positioning System (DGPS), Trimble DA2 Unsworth Richard K F r.k.f.unsworth@swansea.ac.uk dGPS during planting Accuracy H [cm] (dGPS during planting, Differe...) Investigator Investigator Investigator https://www.marinespecies.org/aphia.php?p=taxdetails&id=296877 Unsworth Richard K F r.k.f.unsworth@swansea.ac.uk Planter Investigator (Planter) Comment Comment Unsworth Richard K F r.k.f.unsworth@swansea.ac.uk Comment Monitoring reference database Monitoring DB Unsworth Richard K F r.k.f.unsworth@swansea.ac.uk Monitoring DB CurationLevelC Enhanced curation https://wiki.pangaea.de/wiki/Curation_levels Field experiment In-situ Monitoring author106706 author118504 author118506 author118507 author118508 author118509 author118510 author118511 author118512 award5164 award5167 curlevel30 event3420968 event3420969 event3420970 event3420971 funder1797 funder22897 geocode1599 geocode1600 geocode1601 geocode1619 inst22896 inst2617 journal5064 license21 method12831 method19449 method19450 param102259 param132665 param141184 param145013 param15373 param155369 param1570 param18011 param184312 param184313 param184731 param185520 param48491 param510679 param516119 param533102 param567424 param567425 param567426 param567427 param567428 param567429 param567430 param567431 param567432 param567433 param7056 param7151 param88037 pi106706 project5123 ref140776 term1062349 term1068249 term1073131 term1073146 term1073520 term1073579 term1073628 term1073733 term2606205 term37810 term38263 term38842 term41076 term42421 term43770 term43863 term43975 term44022 term44025 term47611 term49384 term49506 term50572 topotype8