RheaultDrapeauBergeronEtAl2003

Référence

Rheault, H., Drapeau, P., Bergeron, Y. and Esseen, P.A. (2003) Edge effects on epiphytic lichens in managed black spruce forests of eastern North America. Canadian Journal of Forest Research, 33(1):23-32.

Résumé

We studied the spatial and temporal response of three epiphytic lichens (Bryoria spp., Evernia mesomorpha Nyl., and Usnea spp.) to edge effects in conifer forests of northwestern Quebec. Lichen abundance and substrate variables were sampled at four distances (5, 25, 50, and 100 m) from the edge in 15 edge - interior transects in managed black spruce (Picea mariana (Mill.) BSP) forests. Responses to edge effects were assessed for short-term (1-3 years) and long-term (8 and 16-23 years) periods. We also assessed the effect of forest fragment size on lichen abundance in 27 forest fragments ranging in size from 0.03 ha to >4 ha. We found a significant effect of distance to edge on mass of E. mesomorpha and Usnea spp. Lichen mass was lower in the first 50 m of edge compared with the forest interior (100 m). Size of forest fragments had no significant effect in any of the three lichens. However, mass of Usnea spp. was low in the seven smallest (<0.5 ha) fragments. Our results suggest that the response of epiphytic lichens to edge conditions could be used by forest managers as an indicator in determining the size of remnant stands that should be left to increase the proportion of interior forest habitat in harvested forest landscapes.

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@ARTICLE { RheaultDrapeauBergeronEtAl2003,
    AUTHOR = { Rheault, H. and Drapeau, P. and Bergeron, Y. and Esseen, P.A. },
    TITLE = { Edge effects on epiphytic lichens in managed black spruce forests of eastern North America },
    JOURNAL = { Canadian Journal of Forest Research },
    YEAR = { 2003 },
    VOLUME = { 33 },
    PAGES = { 23-32 },
    NUMBER = { 1 },
    NOTE = { 00455067 (ISSN) Cited By (since 1996): 17 Export Date: 25 April 2007 Source: Scopus CODEN: CJFRA Language of Original Document: English Correspondence Address: Rheault, H.; Grp. de Rech. en Ecologie Forestiere; Dept. des Sci. Biologiques; Univ. du Quebec a Montreal; C.P. 8888, succursale Centre-Ville Montre?al, Que. H3C 3P8, Canada; email: heloise.rheault@internet.uqam.ca References: Adams, D.B., Risser, P.G., Some factors influencing the frequency of bark lichens in north central Oklahoma (1971) Am. J. Bot., 58, pp. 752-757; Arseneau, M.-J., Ouellet, J.-P., Sirois, L., Fruticose arboreal lichen biomass accumulation in an old-growth balsam fir forest (1998) Can. J. Bot., 76, pp. 1669-1676; Bergeron, Y., Harvey, B., Leduc, A., Gauthier, S., Forest management guidelines based on natural disturbance dynamics: Stand-and-forest-level considerations (1999) For. 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    ABSTRACT = { We studied the spatial and temporal response of three epiphytic lichens (Bryoria spp., Evernia mesomorpha Nyl., and Usnea spp.) to edge effects in conifer forests of northwestern Quebec. Lichen abundance and substrate variables were sampled at four distances (5, 25, 50, and 100 m) from the edge in 15 edge - interior transects in managed black spruce (Picea mariana (Mill.) BSP) forests. Responses to edge effects were assessed for short-term (1-3 years) and long-term (8 and 16-23 years) periods. We also assessed the effect of forest fragment size on lichen abundance in 27 forest fragments ranging in size from 0.03 ha to >4 ha. We found a significant effect of distance to edge on mass of E. mesomorpha and Usnea spp. Lichen mass was lower in the first 50 m of edge compared with the forest interior (100 m). Size of forest fragments had no significant effect in any of the three lichens. However, mass of Usnea spp. was low in the seven smallest (<0.5 ha) fragments. Our results suggest that the response of epiphytic lichens to edge conditions could be used by forest managers as an indicator in determining the size of remnant stands that should be left to increase the proportion of interior forest habitat in harvested forest landscapes. },
    KEYWORDS = { Landforms Sampling Substrates Edge effects Spatial response Forestry bioindicator edge effect epiphyte habitat fragmentation harvesting lichen silviculture spatiotemporal analysis Canada Bryoria Evernia mesomorpha Picea mariana Usnea },
    OWNER = { brugerolles },
    TIMESTAMP = { 2007.12.05 },
}

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