Response Statement - Flooded Jellyskin
Since this lichen was last assessed in 2004, increased search effort and a better understanding of its habitat requirements have revealed new occurrences in Manitoba, Ontario, and Québec and the minimum number of mature individuals is now estimated at 350,000. Canada is thus the stronghold for this species which has declined or disappeared from elsewhere in its global range. Emerald Ash Borer is a major threat killing ash trees that are an important host species for this lichen where it is most abundant in southern Ontario. Up to 50% of the population may be affected within the next few decades. Another threat is climate change which is expected to create drier conditions that will reduce seasonal flooding which this lichen requires to survive. It also needs calcareous enrichment, and as a result has an even more patchy distribution in the inaccessible boreal regions of Manitoba and Ontario where the number of individuals is lower but not accurately known. The predicted impact of these two threats on this lichen results in the recommended status of Special Concern.
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Canadian Wildlife Service
351 Boul St-Joseph
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