Linking Historical and Future Land-Use Change to the...
Transcript of Linking Historical and Future Land-Use Change to the...
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Linking Historical and Future Land-Use
Change to the Economic Drivers and
Biophysical Limitations of Agricultural
Expansion in the Brazilian Cerrado
Michael T Coe1, Marcia Macedo1, Laerte Ferriera2, Manuel Ferreira2, Eric Davidson1, Gillian Galford3, Wayne Walker1,
Josef Kellndorfer1, and Britaldo Soares-Filho4
The Woods Hole Research Center1, Federal University of Goiâs, Brazil2,
University of Vermon3, Federal University of Minas Gerais, Brazil4
NASA LCLUC NNX11AE56G
April 3, 2013
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South American and the two largest
Brazilian biomes
Amazônia
Cerrado
Caatinga
Mata Atlantica
Pampas
Pantanal
Cerrado Biome:
Tropical savanna environment
2nd largest biome in Brazil (2
million km2)
Highest biodiversity of all
tropical savannas
Undergoing rapid conversion
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South American and the two largest
Brazilian biomes
Amazônia
Cerrado
Caatinga
Mata Atlantica
Pampas
Pantanal
2010
~40 years...
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South American and the two largest
Brazilian biomes
Cerrado
Cerrado biome:
The largest producer of
soy, beef, and cotton in
Brazil
National contribution:
Beef: 55%
Soybean: 63%
Cotton: 89%
Coffee: 50%
Corn: 44%
Rice: 37%
~ 60 million ha of
cultivated pasture
~ 80 million head of
cattle (1.1 head/ha)
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Soybean led the agricultural boom
Largest increases in soy
production came from areas of
Cerrado
0
5
10
15
20
25
30
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
Mt
Soybean Exports
Brazil
Source: FAO Galford et al.
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Sugar/ethanol: expanding rapidly
• Brazil: sugar cane production increased 35% in 5 yrs
• Largely due to increased production in Cerrado
0
200,000
400,000
600,000
800,000
1,000,000
1,200,000
1,400,000
1,600,000
2006 2007 2008 2009 2010 2011
Centro-Oeste: Sugarcane area (ha)
Source: SIDRA/IBGE Galford et al.
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Goals of this project:
Quantify land use and land cover changes in the last decade
and relate to biophysical and human drivers
Simulate scenarios of future land cover and land use change
as function of regional drivers
Assess impacts of historical and future changes on H2O, C,
N2O, CH4, and climate
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PROBIO 2002 LAPIG 2009
Brazilian National Cerrado Deforestation Map
Ferreira team at UFG
Quantifying Land Cover and Use Change
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Agricu
ltural F
rontie
rs (km2)
Current deforestation is
concentrated in two arcs in
west and NE
Total area deforested
47,800 km2
Rocha, G.F. et al. Revista Brasileira de Cartografia
Municipal-level deforestation in last decade
MOD13Q1
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0
2000
4000
6000
8000
10000
Are
a K
m2
Genival et al. (2011)
Annual deforestation within Cerrado region
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Differing deforestation dynamics?
Increased agricultural
production in both regions
Decreased clearing in the
Amazon but increased
clearing in the Cerrado
In Amazon new laws,
protected areas, and
enforcement appear to
reduce deforestation in
both biomes
0
2,000
4,000
6,000
8,000
10,000
12,000
14,000
2007 2008 2009 2010 2011 2012
Are
a D
efo
rest
ed
(km
2)
Amazon
Cerrado
Source: IBGE, LAPIG/UFG Source: IBGE, LAPIG/UFG Galford et al.
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Sugarcane expansion in Cerrado: (2003 - 2010)
2003
2010
Agricultural intensification
INPE-Canasat, Rudorff et al.
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Are
a (K
m2)
Sugarcane is expanding predominantly over existing
commodities
0
5000
10000
15000
20000
25000
30000
2003 2004 2005 2006 2007 2008 2009 2010
Sugarcane crops over:
Manuel Ferreira et al. - LAPIG, 2011
Croplands
Remnant Cerrado
Pasture
Manuel Ferreira et al., LAPIG, nov. 2011
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(km2)
Araújo, F.M. et al. Remote Sensing (submitted)
MODIS
MCD45A1
Fire Scars / Burned Area
(2002 – 2010)
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(km2)
Araújo, F.M. et al. Remote Sensing (submitted)
MODIS
MCD45A1
Bio
mes
(%)
Fire Scars / Burned Area
(2002 – 2010)
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(km2)
Bio
mes
(%)
MAPITOBA
GO-MT (%)
75%
Araújo, F.M. et al. Remote Sensing (submitted)
MODIS
MCD45A1
Fire Scars / Burned Area
(2002 – 2010)
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Fire Scars / Burned Area
(2002 – 2010)
Remnant Vegetation
& Burned area (%)
Araújo, F.M. et al. Remote Sensing (submitted)
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http://www.lapig.iesa.ufg.br/lapig/
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Applying products to understand effects on
historical H2O, C, N2O, and CH4
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Cerrado deforestation and carbon flux
• 25,000 km2 cleared 2007-2012
• Doubling of direct emissions
Source: WHRC, LAPIG/UMG Galford et al.
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Cerrado fires: carbon and N fluxes
0
2
4
6
8
10
12
200
7
200
8
200
9
201
0
201
1
Tg C
O2-e
Fire: CH4
Fire: N2O
Fire: CO2
BGC
AGB
• 2010: 7,500km2 burned
• N2O and CH4 important
Source: MODIS, LAPIG/UMG Galford et al.
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MOD16 Evapotranspiration
Large decrease in mean ET over deforested regions (e.g. -30%) Large increase in mean ET rate in years following fires
Macedo et al.; Galford et al.
Significant and complex hydrologic response
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Land available for agriculture
Soares-Filho et al., in prep
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Weights of evidence,
econometric model to
predict land use and land
cover transitions
Start by relating existing
distribution of crops and
pasture to biophysical and
infrastructure characteristics
Scenarios of future land use change
Soares-Filho et al.; M.E
Ferreira et al.
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Relationship with existing cleared land
M.E. Ferreira et al., 2012
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Sugar cane and relationships to infrastructure
M.E. Ferreira et al., 2012
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Agroclimatic zoning derived for soy, cocoa, wheat and cotton
L. Lima et al.
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Physical and logistic suitability for Soy
L. Lima et al.
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Potential rents for soybean crops in Brazil at 2009 prices
L. Lima et al.
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Highest rent for sugarcane, soy, and corn
L. Lima et al.
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Suitable pastureland for crops. Of 230 M ha of pasturelands, about 140 M ha is judged suitable for various types of crops.
Crop suitability
Soares-Filho et al.
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Simulated deforestation probability 2002-2009
Remnant vegetation
Deforested 2002 Deforested 2050
T. Lima, 2013
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Simulated vegetation change 2010-2050
T. Lima, 2013
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Simulated climate and crop yield as function of
deforestation and GHG scenarios
Oliveira et al., in review
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Oliveira et al., in review
Climate changes from remote (GHG) and local
(deforestation)
Deforestation reduces rainfall to point where
soy is no longer viable in portions of region
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South American and the two largest
Brazilian biomes
Cerrado
Deforestation, intensification, and
fires continue at high rates in the
Cerrado
Fluxes of C, N, and H20 have been
significantly altered
Large opportunity for agricultural
growth without new deforestation
Simulations suggest significant
potential for continued
deforestation
Future land cover changes are
large enough to alter climate and
crop yield
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