evaluation of ecosystem processes and global change adaptation. extreme ecosystems
TRANSCRIPT
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Evaluation of ecosystem processes and global change adaptation.
Extreme Ecosystems
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Research teamResearch team• Carlos Iván Espinosa• Pablo Ramón• Elizabeth Gusmán• Omar Cabrera• Indira Black• Diego Marín• Andrea Jara
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Tropical dry forest of Southern Ecuador
• Dry season: May to
November
• Annual temperature: 20-26 °C
• Annual precipitation: 300-700 mm
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Tropical dry forest of Southern Ecuador
•High levels of endemism
•Amotape-Huancabamba area constitutes a single phytogeographic zone.
Imágenes fauna: http://www.darwinnet.org
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General objetive:• To examine the biological effects of global change on the
dynamic and integrity´s ecosystems, indicated by changes in the structure and functionality.
Evaluation of ecosystem processes and global Evaluation of ecosystem processes and global change adaptation. change adaptation. Extreme ecosystemsExtreme ecosystems..
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Specific objetives:
1. To monitory the temporal changes in structure and functionality of dry forest, which allow us to define indicators of change.
Temporal approach
2. To study the changes in vegetation along an altitudinal gradient to simulate changes caused by variations in environmental conditions.
Spatial approach
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Objective 1: Dry forest characterization and definition of indicators of change.
• Establishment of a 25 has. plot
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Objective 1
• Is the community structure of dry forest (regeneration and adult plants) explained by interspecific relationship and seed dispersal processes in space and time?
• Spatial structure of woody plants
• Seed dispersal syndromes and spatial distribution of adult plants and seed rain.
The first 5 has. of the plot have been established
floristic composition
spatial distribution data
1 Ha
Installing seed traps in 5 ha plot for sampling of seed rain density
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Objective 1:
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Objective 1:
Preliminary inventory of birds species of REMA
25 species captured in mist nets
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Objective 1:
• To what extent environmental variables determine the dynamic (growth, recruitment and mortality) and the phenological cycles of dry forest species?
• Radial growth of: Geoffroea spinosa, Capparis flexuosa, Bursera graveolens & Tabebuia chrysantha
• variation of precipitation and temperature phenology of growth ring of deciduous, semi-deciduous and evergreen
4 months of monitoring
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Objective 2: Extreme ecosystems adequacies to environmental variations
• Spatial patterns: 30 x 30 m plots 200m
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Objective 2:• What changes are there in the community structure and
species morpho-physiology in response to changing environmental conditions?
• Factors:– Altitud temperatura
Croton wagneri Insects community(Leaves morpho-physiology)
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Objective 2:• What changes are there in the community structure and
species morpho-physiology in response to changing environmental conditions?
• Factors:– Altitud temperatura– Pendiente nutrients
Croton wagneri
3500 mapped points:- Dependent variables: location, length, crown area
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Objective 2:
• How do environmental conditions, interspecific relationships and soil seed bank influence the gap – patch dynamic?
- 432 soil samples soil seed bank