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Fragment risk scores integrate climate suitability (using pathogen-specific temperature-dependent growth curves and a relative humidity threshold), proximity to rivers/flooding, connectivity to other alder fragments via flood events and recent planting of alder under forestry grant schemes. Data and models used to score risk factors are variable in their time frames, but are broadly representative of the period from 2013 to 2023. Phytophthora disease of alder has been widespread in southern England since at least 1995 and became more prevalent in annual surveys between 1994 and 2003. It has been confirmed at several riparian sites in Scotland. P. x alni diseases are reported only from the alder genus.","distributionFormats":[{"name":"TIFF","type":"image/tiff","version":"unknown"},{"name":"GeoPackage","version":"unknown"}],"distributorContacts":[{"organisationName":"NERC EDS Environmental Information Data Centre","organisationIdentifier":"https://ror.org/04xw4m193","role":"distributor","email":"info@eidc.ac.uk"}],"funding":[{"funderName":"Natural Environment Research Council","funderIdentifier":"https://ror.org/02b5d8509","awardNumber":"NE/V019813/1","orcid":false,"ror":true},{"funderName":"Scotland's Plant Health Centre","funderIdentifier":"CASE/592055","awardTitle":"Improved preparedness for Phytophthora prevention in Scotland","awardNumber":"PHC2023/02","awardURI":"https://www.planthealthcentre.scot/projects/improved-preparedness-phytophthora-prevention-scotland","orcid":false,"ror":false},{"funderName":"Department for Environment Food and Rural Affairs","funderIdentifier":"https://ror.org/00tnppw48","awardTitle":"Mitigating threats from Phytophthora","awardNumber":"TH12224FR10","awardURI":"https://www.gov.uk/government/publications/plant-health-research-and-development-plan-2023-to-2028/plant-health-research-and-development-plan#annex-1-defra-plant-health-research-activities-in-the-2022-to-2023-financial-year-mapped-to-areas-of-focus-excludes-co-funded-ukri-research-programme-projects","orcid":false,"ror":true}],"hasOnlineServiceAgreement":true,"id":"824f9ba8-7d1c-4a82-b5ec-a4f850f1d370","incomingCitationCount":0,"infoLinks":[{"url":"https://data-package.ceh.ac.uk/sd/824f9ba8-7d1c-4a82-b5ec-a4f850f1d370.zip","name":"Supporting information","description":"Supporting information available to assist in re-use of this dataset","function":"information","eidcDistribution":false,"type":"OTHER"}],"inspireThemes":[{"theme":"Habitats and Biotopes","uri":"http://inspire.ec.europa.eu/theme/hb"}],"keywordsOther":[{"value":"biodiversity","uri":"http://www.eionet.europa.eu/gemet/concept/827"},{"value":"exotic species","uri":"http://www.eionet.europa.eu/gemet/concept/3048"},{"value":"forest","uri":"http://www.eionet.europa.eu/gemet/concept/3406"},{"value":"forestry","uri":"http://www.eionet.europa.eu/gemet/concept/3439"},{"value":"habitat","uri":"http://www.eionet.europa.eu/gemet/concept/3808"},{"value":"pathogenic organism","uri":"http://www.eionet.europa.eu/gemet/concept/6064"},{"value":"pest","uri":"http://www.eionet.europa.eu/gemet/concept/6138"},{"value":"phytopathology","uri":"http://www.eionet.europa.eu/gemet/concept/6244"},{"value":"risk assessment","uri":"http://www.eionet.europa.eu/gemet/concept/7236"},{"value":"Alnus glutinosa","uri":"http://www.wikidata.org/entity/Q156904"},{"value":"Alnus cordata","uri":"http://www.wikidata.org/entity/Q1543689"},{"value":"Alnus incana","uri":"http://www.wikidata.org/entity/Q157641"}],"keywordsPlace":[{"value":"Scotland"}],"keywordsTheme":[{"value":"Environmental risk","uri":"http://onto.nerc.ac.uk/CEHMD/topic/5"},{"value":"Environmental survey","uri":"http://onto.nerc.ac.uk/CEHMD/topic/7"}],"licences":[{"value":"This resource is available under the terms of the Open Government Licence","code":"license","uri":"https://eidc.ac.uk/licences/ogl/plain"}],"lineage":"We employed an iterative and collaborative co-production process that brought together stakeholders with diverse expertise from across Scotland's plant health sector representing forestry, conservation, horticulture, and government agencies through a semi-structured process of survey and workshops. Fragments containing alder species were extracted from the National Forest Estate Sub-compartments 2019, Native Woodland Survey of Scotland and global database of host-Phytophthora detections, removing any felled areas since 2013 using the National Forest Inventory. Key risk factors (climate suitability, proximity to rivers/flooding, connectivity to other alder fragments via flood events and recent planting of alder) and their scoring were agreed with 15 cross-sectoral stakeholders through a self-completion survey and two workshops. The final report was peer reviewed by the Plant Health Centre. In addition, a knowledge integration and validation workshop (November 13, 2024) examined the adequacy of the outputs for horizon scanning and decision-making across sectors. Validation of the climate suitability models has been attempted using independent UK and European detections of Phytophthora x alni.","metadataDate":"2026-08-25T09:15:23","notGEMINI":false,"onlineResources":[{"url":"https://data-package.ceh.ac.uk/data/824f9ba8-7d1c-4a82-b5ec-a4f850f1d370","name":"Download the data","description":"Download a copy of this data","function":"download","eidcDistribution":true,"type":"OTHER"},{"url":"https://data-package.ceh.ac.uk/sd/824f9ba8-7d1c-4a82-b5ec-a4f850f1d370.zip","name":"Supporting information","description":"Supporting information available to assist in re-use of this dataset","function":"information","eidcDistribution":false,"type":"OTHER"}],"publicationDate":"2025-10-08T00:00:00.000Z","publishers":[{"organisationName":"NERC EDS Environmental Information Data Centre","organisationIdentifier":"https://ror.org/04xw4m193","role":"publisher","email":"info@eidc.ac.uk"}],"relAll":[{"title":"Spatial risk analysis for Phytophthora ramorum infection in 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