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Blueberry/forestry : a reasonable accommodation ?

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Presentation on theme: "Blueberry/forestry : a reasonable accommodation ?"— Presentation transcript:

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

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

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

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

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

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

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

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

9 4. Methods 4.3 Statistical analysis Presence-absence repeated surveys
Detection probability (Mackenzie et al., 2006) PRESENCE 2.1 program Table 1. Detection history Model comparison methods (QAICc) (Burnham & Anderson, 2002) ID Visit 1 Visit 2 Visit 3 FA01 FA02 1 FA03 FA04 Multimodel inference (Burnham & Anderson, 2002)

10 4. Methods 4.3 Statistical analysis 21 models/species
Occupancy variables (Ψ): % Harvested % Harvested2 % Deciduous tree Detection variables (p): % Harvested Observer Time since sunrise Julian day

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

12 5. Preliminary results Table 2. Variables affecting occupancy or detection after model averaging for birds (2007 survey) Species % H % H2 % D Obs Time JD WTSP X GCKI MYWA NAWA SOVI* RCKI HETH BCCH *Without model averaging

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

14 5. Preliminary results Forest-dwelling species 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)

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

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

17 Financial supports and partners
Thanks Director 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 Sanfaçon CAFN: Victor Boulianne, Ursule Bouchard AGIR: Luc Simard, Michel Bouchard, Julie Moreau Study design and analysis: Marc Mazerolle, Martin-Hugues St-Laurent, Christian Roy Ministry: Christian Bélanger, Claude Dussault, Gilles Lupien COASLSJ: Dominique Lavoie Financial supports and partners

18 An accommodation for me ???
Questions ? An accommodation for me ???


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