Blueberry forestry a reasonable accommodation
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Blueberry/forestry : a reasonable accommodation ?. CONFOR 2008 Julie Lavoie (UQAC) Jacques Ibarzabal (UQAC) Louis Imbeau (UQAT) February 2008. 1. Context. Blue gold … Saguenay-Lac-Saint-Jean: Lowbush blueberry fields since 1963 2005 = 20 000 ha et 35 M$ (harvest)

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Blueberry/forestry : a reasonable accommodation ?

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Blueberry forestry a reasonable accommodation

Blueberry/forestry : a reasonable accommodation?

CONFOR 2008

Julie Lavoie (UQAC)

Jacques Ibarzabal (UQAC) Louis Imbeau (UQAT)

February 2008


1 context

1.Context

  • Blue gold …

    Saguenay-Lac-Saint-Jean:

    Lowbush blueberry fields since 1963

    2005 = 20 000 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


Blueberry forestry a reasonable accommodation

Lost attributes

Structural changes

2.Problematic

Management impact on wildlife?

Habitat lost and fragmentation


Blueberry forestry a reasonable accommodation

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 rarespecies associated to this habitat


3 objective

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


4 methods

  • 15 blueberry/forestry

    (166 ha)

    15 lowbush blueberry fields

    15 jack pine stands

4. Methods

4.1 Study area


4 2 wildlife surveys

4.2 Wildlife surveys

4. Methods

  • Habitat (vegetation plot) 2006-07

  • Small mammals (mortal traps) 2006-07

  • Medium mammals (track counts) 2007


4 2 wildlife surveys1

Blueberry 60 m

Forest (3*20m)

Blueberry 60 m

100 m

4.2 Wildlife surveys

4. Methods

  • Birds (point-counts)

    • 3 visits

    • 4:30 and 9:00 AM

  • 10 min passive point-counts

  • 5 min playback

  • 5 min mobbing calls of BCCH

  • 5 min passive point-counts


Blueberry forestry a reasonable accommodation

4. Methods

4.3 Statistical analysis

  • Model comparison methods (QAICc) (Burnham & Anderson, 2002)

  • Presence-absence repeated surveys

  • Detection probability(Mackenzie et al., 2006) PRESENCE 2.1 program

Table 1. Detection history

  • Multimodel inference (Burnham & Anderson, 2002)


Blueberry forestry a reasonable accommodation

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


Blueberry forestry a reasonable accommodation

4. Methods

4.3 Statistical analysis

Occupancy

Open-habitat species

Forest-dwelling species

Ubiquitous species

Edge species

% Harvested


5 preliminary results

5. Preliminary results

Table 2. Variables affecting occupancy or detection after model averaging for birds (2007 survey)

*Without model averaging


Blueberry forestry a reasonable accommodation

Occupancy

% Harvested

5. Preliminary results

Edge

Figure 1. Number of visits with detection per treatment for the White-throated sparrow(Zonotrichia albicollis )


Blueberry forestry a reasonable accommodation

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)


Blueberry forestry a reasonable accommodation

Occupancy

% Harvested

5. Preliminary results

Ubiquitous

Figure 3. Number of visits with detection per treatment for hermit thrush (Catharus guttatus)


6 conclusions

6. Conclusions

Reasonable accommodation …

Birds (preliminary results)

Ubiquitous species

Edge species

Forest-dwelling species

Others guilds

CONFOR 2009: Saguenay !!!


Thanks

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


Questions

Questions ?

An accommodation for me ???


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