Influence of Time since Fire and Micro-Habitat Availability on Terricolous Lichen Communities in Black Spruce (Picea mariana) Boreal Forests

Zouaoui, Saliha, Boudreault, Catherine, Drapeau, Pierre et Bergeron, Yves (2014). Influence of Time since Fire and Micro-Habitat Availability on Terricolous Lichen Communities in Black Spruce (Picea mariana) Boreal Forests. Forests , 5 (11). pp. 2793-2809. doi:10.3390/f5112793 Repéré dans Depositum à https://depositum.uqat.ca/id/eprint/1157

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Résumé

Terricolous lichens are an important component of boreal forest ecosystems, both in terms of function and diversity. In this study, we examined the relative contribution of microhabitat characteristics and time elapsed since the last fire in shaping terricolous lichen assemblages in boreal forests that are frequently affected by severe stand-replacing fires. We sampled 12 stands distributed across five age classes (from 43 to >200 years). In each stand, species cover (%) of all terricolous lichen species and species richness were evaluated within 30 microplots of 1 m2. Our results show that time elapsed since the last fire was the factor that contributed the most to explaining terricolous lichen abundance and species composition, and that lichen cover showed a quadratic relationship with stand age. Habitat variables such as soil characteristics were also important in explaining lichen richness. These results suggest that the presence of suitable substrates is not sufficient for the conservation of late-successional terricolous lichen communities in this ecosystem, and that they also need relatively long periods of times for species dispersal and establishment.

Type de document:	Article
Informations complémentaires:	Licence d'utilisation : CC-BY 4.0
Mots-clés libres:	Chronosequence; Cladonia; Model averaging; Old forests; Terricolous lichens; Variation partitioning
Divisions:	Forêts
Date de dépôt:	13 mai 2020 15:28
Dernière modification:	13 mai 2020 15:28
URI:	https://depositum.uqat.ca/id/eprint/1157

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