lidar group
Transcript of lidar group
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Forest physical structure in contrastingaltitudes and ecological conditions
Ana Paula Florentino, Georgina Conti, Imma Oliveras, Javier Silva and Lía MonttiCoordinated by Scott Stark
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Forest structure may influence or predict several ecosystems attributes
-Canopy structureLAI: Photosynthesis , productivity, decomposition
-Diameter and height structure Forest Growth, aboveground biomass
carbon stocks
- Physical attributes: albedo, cover, roughness microclimate
- Diversity of microsites and habitatsabundance and ditribution of several
organisms
STRUCTURE FUNCTION
Why is important study forest structure?
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How does an altitudinal gradient influence forest attributes?
Girardin et al. 2010
ABOVEGROUND BIOMASSBASAL AREA
Silman´s presentation
What is the future of Amazon forests under climate change?
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How to study forest cover structure?
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Satellite remote
sensing
Permanent field plot
Direct and & effective measures of
forest structure and ecosystemprocesses
Estimation for large areas
Local scale, time-consuming.
Low resolution for ecological
processes, two-dimentional
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Light detection and ranking (LIDAR)
Airborne LIDAR Portable ground LIDAR
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Questions
1-Does forest structure change with elevation?
3- Does fire affect forest structure?
2- Do changes in forest structure affect light incidence and
forest absorption over the Amazon?
4-Do LIDAR-based estimations differ from field observations?
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Methods
STUDY SITE ELEVATION
(m)
TEMPERATURE
( °C)
RAINFALL
(mm yr-1)
Wayqecha 3025 11.1 1706
Tambopata 210 23.9 2730
Study area
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Methods
- Field data from Wayqecha and Tambopata plots (RAINFOR and fire project plots)
- LIDAR data from conical sampling (Wayqecha) and linear transects (Tambopata)
Experimental design (LiDAR)
Wayqecha
(conical sampling at 6 different angles)
Tambopata
(linear sampling)
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Results: Does forest structure differ with elevation?
WAYTAM
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Results: Do changes in forest structure affect light incidence and
forest absorption?
TAM-03TAM-04TAM-09
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Results: Do changes in forest structure affect light incidence and
forest absorption?
TAM-03TAM-04TAM-09
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Results: Do changes in forest structure affect light incidence and
forest absorption?
TapajosTAMDuckeTAM
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Results: How does fire affect forest structure?
BurnedUnburned
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Results: How does fire affect forest structure?
R l
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Results: Do LIDAR-based estimations differ from field
observations?TAM-04 TAM-09 WAYQECHA
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Conclusions
• Altitude changes tree height, and there is some changes in
relative vertical distribution of vegetation
• Light absorption and incidence are driven by the canopy
vertical distribution (difference between plot 9 and plot 4)
• Fire deeply changes forest structure by eliminating tallest
trees
• Some evidnece that LAI similar at different elevations, but
changes with fire
• Local forest structure is similar to a site in Central Amazon (~
1,000 km away)
• A simple model relating basal area to leaf area can predict
vertical forest structure
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LIDAR Group
PASI 2011-PERÚ
Gracias!!!
Moltes gràcies!!!
Obrigada!!! Thank you!!!