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Assessing Human Disturbance on the Amazon/Solimões River Floodplain Forest and its
Impacts on the Várzea Aquatic Systems
Evlyn NovoCláudio Barbosa
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Who?
Evlyn Marcia Leão de Moraes Novo
Researcher: Pos-Doc Univ.Sheffield, 1987
Ph.D Physical Geography - USP, 1984
Hydrosphere and RS Spectral Analysis
Claudio Clemente Faria Barbosa
Researcher: Ph.D Remote Sensing – INPE,2005
Hydrosphere
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Research Questions
1) Which degrees of anthropicdisturbances are imposed to theforest covered area between thehigh/medium Solimões and themedium/low Amazonas?
2) What are the effects of thesedisturbances on the várzea aquaticecosystems?
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Scientific Questions1) How the structural and floristic integrity of the
Várzea Forest (measured by levels of landscapedisturbance, vegetation cover, and proportionaldistribution of habitat succession) affects aquaticsystem processes
2) How the human activities in the Várzea(settlement density, settlement age, settlementproximity to large urban areas, etc) affectsaquatic system components such as macrophytedensity and diversity, phytoplankton diversity,fish production and diversity?
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Study Area: Solimões/Amazonas Floodplain
SBelém
ManausSantarém
Source: Rennó, 2010
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FactsElectrical Conductivity Gradient
I-Workshop-Geoma_Calha Manaus, INPA,
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Solids Suspended Gradient
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Water Temperature Gradient
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Which amount of these differences in water properties is natural?
Which amount is induced by vegetation
change in the várzea?
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Problems
Natural Gradient
• Irradiance
• Temperature
• Pluviosity
• Liquid and Solid Flows
• Flood Pulse Amplitude
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Solar Radiation Gradient
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Temperature Gradient
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Precipitation Gradient
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Liquid and Solid Flows Gradients
Fonte:Warne et al. 2002
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Water Level Amplitude Gradient
São Paulo Olivença Óbidos
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Fonte: INPE, 2009
Source: Amaral, 2003, adapted from IBGE, 2000
Manaus
Population
Density
(hab/km²)
Deforestation 2009
Desflorestamento
Floresta
Não~floresta
Corpos de Água
Nuvens
Fonte: Affonso et al.2010
Floodplain Human
Occupation Gradient
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Source: IBGE, 2007
Source: INPE, 2009
Manaus
Monte Alegre
Uarini
Desflorestamento
Floresta
Não~floresta
Corpos de Água
Nuvens
Source: Affonso et al. 2010
Cattle
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Forest Removal ResultsChange in the water flow resistance
coefficient
Change in the distribution of hydraulicroughness coefficient (measure of theresistance imposed by vegetation to thefree flow of water) (Dawson & Charlton,1988; Mason et al., 2003; Straatsma &Baptist, 2008)
Change in the water flow velocity andlevel (Mason et al., 2003).
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I-Workshop-Geoma_Calha Manaus, INPA,
Flood - 1999 Flood- 2002
Óbidos
Óbidos
Max=7.24m
Max=7.84m
1999
2002Renó et al.2008
Barbosa , 2005
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Project Activities to Answer These Questions
Model and build a GIS with Solimões-Amazonas floodplain To allow decision makers to identify anthropic disturbances in the flooded forest and their critical levels for aquatic ecosystems stability.
Survey secondary data available in the literature about composition, phytostructure and phyto-phisionomy in representative floodplain forest samples from other researchers.
Identify possible gaps in this samples along the Solimões-Amazonas main channel in “Alto Solimões”, “Medium Solimões”, “Low Solimões and High Amazonas”, “Medium Amazonas” and “Low Amazonas and Estuary
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Project Activities to Answer These Questions
Create primary data in these gaps through a sampling protocol to obtain a greater representation from a 1 hectare minimum sample size in each research unity.
Execute the Flora inventory in várzeas
Model and implement database with flora species catalog and description integrated to satellite images, topographic and thematic maps
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Project Activities to Answer These Questions
Build a list of várzea species with photographic documentation and geographic location
Collect, herborize and catalog at least 200 species native and specific to várzea for the Herbário de Santarém collection
Model the effects of habitat quality and the flooded days on the reproductive biologys of cayman population in the study area
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Project Activities to Answer These Questions
Correlate primary and secondary productivity in várzea lakes;
Correlate covered area by aquatic macrophyte with secondary in várzea lakes;
Model the probability of occurrence of tree species in várzea forests, specially the 10 species with lumber potential
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Strategy
•Map the deforestation evolution in the várzea of the central Solimões/Amazonas floodplain from 1970 to 2010, from MSS, TM and ETM / Landsat images. •Map the hydro epoch from Palsar temporal series according to Hess et al. 2010•Stratify structural and flora sampling accordingly to flooding and anthropization gradients•Integrate flora and limnologic sampling