Canadian Forest Service Publications

Distribution of the boreal felt lichen in a ribbed moraine landscape of eastern Newfoundland. 2012. Arsenault, A.; van Kesteren, R.; Clarke, B. Page 38 in J. O'Halloran et al. Second International IUFRO Conference on Biodiveristy in Forest Eccosystems and Landscapes, 28-31 August 2012, Cork, Ireland.

Year: 2012

Issued by: Atlantic Forestry Centre

Catalog ID: 34542

Language: English

Availability: Not available through the CFS (click for more information).

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Abstract

The boreal felt lichen (Erioderma pedicellatum) is considered endangered in Canada and critically endangered by the International Union for Conservation of Nature. The species has suffered a major reduction in its range over the last century including its extirpation from New Brunswick Canada, Sweden, and Norway and loss of known local populations in other areas. The healthiest and most abundant populations occur on the Island of Newfoundland. Interestingly, while some Newfoundland populations may have disappeared and some seem to be undergoing significant reductions in the number of thalli, conversely recent observations in other areas have discovered new populations and new thalli establishment. Our study has two major objectives: 1. Describe the preference of the boreal felt lichen for specific ecosystems using the forest ecosystem classification of Canada including a detailed terrestrial ecosystem map produced by air photo interpretation and field-work in a ribbed moraine landscape of the Avalon Peninsula. 2. Assess the dynamics of the habitats preferred by the boreal felt lichen using forest structure, disturbance, and tree-ring analysis. Preliminary results using the distribution of over 1000 thalli of Erioderma suggest that the species exerts a clear preference for certain forest ecosystem types as well as certain specific microhabitat characteristics associated with the host trees. We will discuss further the dynamics of the preferred ecosystems and microhabitats we have uncovered and the management implications for an endangered species in a managed landscape in the context of past, present and likely future disturbances such as climate change.