SUMMER HABITAT USE BY SPRUCE GROUSE (Felcipennis canadensis) IN LOGGED AND UNDISTURBED AREAS IN THE PORTNEUF WILDLIFE RESERVE, QUÉBEC, CANADA Pierre Blanchette.

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SUMMER HABITAT USE BY SPRUCE GROUSE (Felcipennis canadensis) IN LOGGED AND UNDISTURBED AREAS IN THE PORTNEUF WILDLIFE RESERVE, QUÉBEC, CANADA Pierre Blanchette and Paul-Émile Lafleur, Ministère des ressources naturelles et de la faune du Québec, Canada Goal: To compare summer habitat attributes used by Spruce grouse at home range and microhabitat scales in a logged and undisturbed areas. Study area : Methods: Microhabitat characterization: Habitat variables were measured around (400 m 2 ) telemetry fixes and paired control points (n=136). Home range analysis: compared habitat composition of the home range from forest map (1: ) with 10 paired control home range of the same area. Results: Problematic : In boreal forest, Spruce grouse is maintain in logged areas by using residual conifereous forests. In mixed hardwood-conifereous regions, spruce grouse are patchy distributed and mainly found in spruce-balsam fir stands. In a way to maintain ecosystemic attributes of conifereous forests of the Réserve faunique de Portneuf, Spruce grouse was chosen as an indicator species of the management of black spruce( Picea mariana) stands. Examples of home range of adult female (bleu) and male (red) in undisturbed (left) and logged (right) areas. Guillaume Desrosiers mean* (ha) SEn 21,04,526 Mean home range size (ha) of spruce grouse in the Réserve faunique de Portneuf ( ). * : No effect of sex and area Home range scale ParameterEstimateSEChi-SquareP Proportion black spruce (%)12, ,9091< 0,0001 Proportion regeneration (%)1,41032,89670,23700,6264 Number larch stands (nb)-0,55210,22246,16370,0130 Number black spruce stands (nb)0,37170,16115,32090,0211 Prop_regeneration * logged area7,29132,96516,04710,0139 Prop_regeneration * undist. area0... Prop_spruce * female-5,04772,11615,69010,0171 Prop_spruce * male0... Microhabitat scale Stratified conditional logistic regression model (stepwise approach) predicting spruce grouse home range presence in the Réserve faunique de Portneuf, Québec, Canada, Lateral obstruction 0,5 - 1 m height No black spruce stems (dbh> 9 cm) Total herbaceous cover Used sites had a higher number of black spruce stems and of small stems (dbh < 1 cm) compared to random sites. In the logged area, grouse also used sites with a lower lateral visual obstruction between 0,5 and 1,0 m of height, and a lower herbaceous cover. Grouse home ranges were positively associated with the proportion of black spruce stands, mainly for males, and with the proportion of stands in regeneration (height < 4 m) but only in the logged area. Also, grouse occurrence probability was positively related with the number of black spruce stands and negatively with the number of larch (Larix laricina) stands. Conclusion: Spruce grouse could find suitable habitat patches within logged landscapes in the Réserve faunique de Portneuf, but residual forests (> 10 m of height) within logged areas seemed essential to maintain spruce grouse populations after forest harvest. Grouse fixes Random points No small stems (dbh< 1 cm)