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Blueberry/forestry : a reasonable accommodation? Blueberry/forestry : a reasonable accommodation ? CONFOR 2008 Julie Lavoie (UQAC) Jacques Ibarzabal (UQAC)

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Presentation on theme: "Blueberry/forestry : a reasonable accommodation? Blueberry/forestry : a reasonable accommodation ? CONFOR 2008 Julie Lavoie (UQAC) Jacques Ibarzabal (UQAC)"— Presentation transcript:

1 Blueberry/forestry : a reasonable accommodation? Blueberry/forestry : a reasonable accommodation ? CONFOR 2008 Julie Lavoie (UQAC) Jacques Ibarzabal (UQAC) Louis Imbeau (UQAT) February 2008

2 1. Context Blue gold … Blue gold … Saguenay-Lac-Saint-Jean: Saguenay-Lac-Saint-Jean: Lowbush blueberry fields since 1963 2005 = 20 000 ha et 35 M$ (harvest) 2005 = 20 000 ha et 35 M$ (harvest) New territories = TSFMA New territories = TSFMA (Timber Supply and Forest Management Agreement) Blueberry/forestry concept Blueberry/forestry concept Often on jack pine (Pinus banksiana) stands Often on jack pine (Pinus banksiana) stands Low land, sandy, well-drained and acid soils, Low land, sandy, well-drained and acid soils, native lowbush blueberry native lowbush blueberry

3 Management impact on wildlife? 2. Problematic Habitat lost and fragmentation Lost attributes Structural changes

4 2. Problematic Lowbush blueberry fields Fauna in jack pine forest community poorly unknown.Fauna in jack pine forest community poorly unknown. Jack pine stands targeted for blueberry/forestry, but these stands are under anthropic pressures (Lac-Saint-Jean region).Jack pine stands targeted for blueberry/forestry, but these stands are under anthropic pressures (Lac-Saint-Jean region). Connecticut warbler (Oporornis agilis) a rare species associated to this habitatConnecticut warbler (Oporornis agilis) a rare species associated to this habitat

5 3. Objective Assess blueberry/forestry impact on wildlife presence (birds, small and medium mammals) and their habitat Blueberry/forestry Jack pine stands Lowbush blueberry fields

6 4. Methods 4.1 Study area 15 blueberry/forestry15 blueberry/forestry (166 ha) (166 ha) 15 lowbush blueberry fields 15 lowbush blueberry fields 15 jack pine stands 15 jack pine stands

7 4. Methods 4.2 Wildlife surveys Habitat (vegetation plot) 2006-07Habitat (vegetation plot) 2006-07 Small mammals (mortal traps) 2006-07Small mammals (mortal traps) 2006-07 Medium mammals (track counts) 2007Medium mammals (track counts) 2007

8 Blueberry 60 m Forest (3*20m) Blueberry 60 m Birds (point-counts)Birds (point-counts) 3 visits 4:30 and 9:00 AM 4. Methods 4.2 Wildlife surveys 100 m –10 min passive point-counts –5 min playback –5 min mobbing calls of BCCH –5 min passive point-counts

9 Model comparison methods (QAIC c ) (Burnham & Anderson, 2002)Model comparison methods (QAIC c ) (Burnham & Anderson, 2002) 4.3 Statistical analysis 4. Methods ID Visit 1 Visit 2 Visit 3 FA01000 FA02100 FA03110 FA04111 … Detection probability (Mackenzie et al., 2006) PRESENCE 2.1 programDetection probability (Mackenzie et al., 2006) PRESENCE 2.1 program Presence-absence repeated surveysPresence-absence repeated surveys Table 1. Detection history Multimodel inference (Burnham & Anderson, 2002)Multimodel inference (Burnham & Anderson, 2002)

10 4.3 Statistical analysis 4. Methods 21 models/species21 models/species Occupancy variables (Ψ):% HarvestedOccupancy variables (Ψ):% Harvested % Harvested 2 % Deciduous tree Detection variables (p): % HarvestedDetection variables (p): % HarvestedObserver Time since sunrise Julian day

11 4.3 Statistical analysis 4. Methods % Harvested Occupancy Open-habitat species Forest-dwelling species Ubiquitous species Edge species

12 5. Preliminary results Species % H % H 2 % D % H ObsTimeJDWTSPX GCKIX MYWAX NAWAX SOVI*X RCKIX HETH BCCH *Without model averaging Table 2. Variables affecting occupancy or detection after model averaging for birds (2007 survey)

13 5. Preliminary results Figure 1. Number of visits with detection per treatment for the White- throated sparrow (Zonotrichia albicollis Figure 1. Number of visits with detection per treatment for the White- throated sparrow (Zonotrichia albicollis ) EdgeOccupancy % Harvested

14 5. Preliminary results Figure 2. Number of visits with detection per treatment for Golden-crowned kinglet (Regulus satrapa), Yellow-rumped warbler (Dendroica coronata) and Nashville warbler, (Vermivora ruficapilla) Forest-dwelling species

15 5. Preliminary results Figure 3. Number of visits with detection per treatment for hermit thrush (Catharus guttatus) Occupancy % Harvested Ubiquitous

16 6. Conclusions Reasonable accommodation … Birds (preliminary results) Ubiquitous species Edge species Forest-dwelling species Others guilds CONFOR 2009: Saguenay !!!

17 Thanks Director and codirector: Jacques Ibarzabal, Louis ImbeauDirector and codirector: Jacques Ibarzabal, Louis Imbeau Field team: Stéphane Blais, Raphaël Demers, Mélanie Meunier, Frédéric Fortin, Jessy Pronovost, Judith Boulianne, Joël Lacasse, Ludovic Béland, Audrey SanfaçonField team: Stéphane Blais, Raphaël Demers, Mélanie Meunier, Frédéric Fortin, Jessy Pronovost, Judith Boulianne, Joël Lacasse, Ludovic Béland, Audrey Sanfaçon CAFN: Victor Boulianne, Ursule BouchardCAFN: Victor Boulianne, Ursule Bouchard AGIR: Luc Simard, Michel Bouchard, Julie MoreauAGIR: Luc Simard, Michel Bouchard, Julie Moreau Study design and analysis: Marc Mazerolle, Martin-Hugues St-Laurent, Christian RoyStudy design and analysis: Marc Mazerolle, Martin-Hugues St-Laurent, Christian Roy Ministry: Christian Bélanger, Claude Dussault, Gilles LupienMinistry: Christian Bélanger, Claude Dussault, Gilles Lupien COASLSJ: Dominique LavoieCOASLSJ: Dominique Lavoie Financial supports and partners

18 An accommodation for me ??? Questions ?

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