Parent Layer: BCR13_BiodiversityAtlasBiodiversite_RCO13

Name: BCR13_ForestHVForet_RCO13

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Description: This layer aggregates potential high conservation value forests per 2 ha hexagon in the Ontario portion of the Mixedwood Plains Ecozone, also known as Bird Conservation Region (BCR)13. It is one of three high value habitat datasets derived from the CWS-ON Landscape Conservation Atlas and Plan (COLCAP). COLCAP is a comprehensive landscape assessment in BCR 12 and 13 that describes and assesses the CWS landscape biodiversity portfolio.In the COLCAP, forest includes conifer swamp, coniferous plantation, deciduous swamp, dense deciduous or coniferous forest, mixed forest mainly deciduous or coniferous, sparse deciduous or coniferous forest, treed bog and treed fen. Data was extracted from the Southern Ontario Land Resources Information System v. 2.0 (OMNRF, 2015), the Provincial LandCover 28 (OMNRF, 1998) and the Forest Resource Inventory (OMNRF, 2004-2011).Using the How Much Habitat is Enough?guidelines, each study unit (2 ha hexagon) containing forest was assessed and scored by the following criteria: percent forest cover in the quaternary watershed, large forest patches, percent of interior forest habitat, proximity to big woods and connectivity.These criteria were added together to calculate an overall forest score for each study unit; this overall forest score was then divided into quartiles and the top 25% of scores were categorized as having potential high conservation value (PHCV). Species at risk (SAR) were assessed and scored by the following criteria: diversity, SAR richness, SAR irreplaceability, global rarity, candidate SAR and probability of critical habitat. These criteria were added together to calculate an overall SAR score for each study unit; this overall SAR score was then divided into quartiles and the top 25% of SAR scores that are within forests were categorized as having PHCV.Migratory bird criteria relevant to forests (landbird stopover habitat and forest bird density) were added together to calculate an overall migratory bird score for each study unit; this overall migratory bird score was then divided into quartiles and the top 25% of migratory bird scores were categorized as having PHCV.Using these three scoring criteria (overall forest scores, SAR scores and migratory bird scores), each study unit was assigned a final PHCV score (0-3). A final PHCV score of 0 indicated that while the study unit may contain forest, it was not within the top 25% of overall forest scores. Study units with a final PHCV greater than 0 were aggregated together at 750 m to derive High Value Habitat: Forest.Secondary Site - Forest = less than 20 ha in size; Biodiversity Site - Forest = greater than 20 ha in size.

Copyright Text: Environment and Climate Change Canada - Canadian Wildlife Service, Ontario, in partnership with the Nature Conservancy of Canada, 2016.

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