Why are there so many small woodlots in southwestern France landscapes
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Transcript of Why are there so many small woodlots in southwestern France landscapes
In some temperate landscapes, small woodlots (forest fragments) are kept,
despite unfavorable policies, and managed in traditional ways producing a diversity of structures support for ecosystem services. Theories on social and ecological co-evolution
explain the resilience of this systems
Long Term Social & Ecological Research platform (LTER-Europe)in south west of France
Toulouse
Auch
St Gaudens
What are the determinants of forestry activities that seem to be in opposition with usual recommandations?
2 years in 2 small villages
Interviews Direct observation of
the practices Social context Relationships between
actors Historical depth A Sourdril
The House (land, building, forest and social status) is transmitted to the oldest heir son (even against the law!)
High social value of the forest: rarely sold Forest outside the main economical
development
12
Légende: Limites patrimoine Bois de chauffage Espace / gibier Pâturage Bois d’œuvre Champignons
N
50 m
« Maison » Salvy 1974
Ground beetles density (/m²)
1
5
25
125
Number of species per trap
1
3
10
25
2014 ground beetles collected, from 48 species
Density of ground beetles (m-2)Edge 25-50 m >75 m
Pred Poly Phyto
0.0
0.2
0.4
0.6
0.8
1.0
Predatory species (n=1374, s=18)
Kruskal-Wallis testp=0.32
Pred Poly Phyto
0.0
0.2
0.4
0.6
0.8
1.0
Polyphagous species (n=429, s=4)
Kruskal-Wallis testp=0.0058
Pred Poly Phyto
0.0
0.2
0.4
0.6
0.8
1.0
Phytophagous species (n=100, s=7)
Kruskal-Wallis testp=0.32
Feeding mode
Rela
tive
abun
danc
e