the forest frontier as the link between conflict risk, coca cultivation and high biodiversity areas
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The forest frontier as the link between conflict risk, coca cultivation and high biodiversity areas
Liliana M. Dávalos
ICCB24 July 2017
!
Coca = deforestation Dávalos et al. 2011 Env. Sci. & Tech.
Evaluating effects of coca
• Direct vs. indirect• Plots small, direct
effect small• Indirect effects larger
• There are other countries• Should hold across
producers• Background
deforestation ≠ 0• Must control for other
factors• E.g., roads, population
Dávalos et al. 2011 Env. Sci. & Tech.
Rates higher in areas without coca, but Bolivia
Data from Hansen et al. 2013 Science
Direct loss rate from coca is low
UNODC 2016 World Drug Report
In Bolivia rates did rise with coca boom
Killeen et al. 2007 Ambio
If not coca then what?Sánchez Cuervo & Aide 2013 Ecosystems Armenteras et al. 2013 Reg. Environ. Change Dávalos et al. 2011 Env. Sci. & Tech.
Key points, illicit crops
• Direct effects• Loss rate high when
compared to other agriculture ✘
• Indirect effects:• Loss rate higher in
producer regions ✘• Times with more coca
correspond to more deforestation in Bolivia ✔
• Coca cultivation will covary with rates ✘
Novoa & Finer 2015
Similarities
• Brücher 1977 Geogr. Z.
Coca cultivation
HighLow
2014Percent forest Probability of coca
b c
A spatial relationship Dávalos et al. 2016 Bioscience
Coca cultivation
HighLow
2014Percent forest
HighLow
Probability of coca
b c
The Amazonian frontier Denevan 1966 Geogr. Rev.
The frontier
• Border between settled lands and natural habitats (nominally belongs to the state)• Forest->property• Final state = no forest• Already happened in other
regions• Most of Andes• western Caquetá• western Putumayo
• Currently unfolding in parts of Amazonia, most of Chocó
Etter et al. 2006 J. Environ. Manage.
Frac
tion
fore
st
200 km
40 km
Not all effects depend on rates
• If endemic species• Small area = large
effect• Biodiversity in Andes,
Chocó• High• Irreplaceable
• Detailed and focused analyses needed
Unpublished
Amphibians Birds MammalsTh
reat
ened
spe
cies
All
spec
ies
2,000km0
High
HighLow
Low
Coca is a major threat Unpublished
The frontier A general model
Frac
tion
fore
stcoca beachhead
Time ->
mixed agriculture
properties
pastures!
Álvarez 2001 Environmentalist
Álvarez 2001 Environmentalist
Yes! Because the frontier goes on
Thanks!