Evaluation of ecosystem processes and global change adaptation. Extreme Ecosystems

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  • Evaluation of ecosystem processes and global change adaptation. Extreme Ecosystems

  • Research teamCarlos Ivn EspinosaPablo RamnElizabeth GusmnOmar CabreraIndira BlackDiego MarnAndrea Jara

  • Tropical dry forest of Southern Ecuador Dry season: May to November

    Annual temperature: 20-26 C

    Annual precipitation: 300-700 mm

  • Tropical dry forest of Southern EcuadorHigh levels of endemism

    Amotape-Huancabamba area constitutes a single phytogeographic zone. Imgenes fauna: http://www.darwinnet.org

  • General objetive:To examine the biological effects of global change on the dynamic and integritys ecosystems, indicated by changes in the structure and functionality.

    Evaluation of ecosystem processes and global change adaptation. Extreme ecosystems.

  • 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

  • Objective 1: Dry forest characterization and definition of indicators of change.Establishment of a 25 has. plot

  • Objective 1Is 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 establishedfloristic composition

    spatial distribution data

    Installing seed traps in 5 ha plot for sampling of seed rain density

  • Objective 1:

  • Objective 1:

    Preliminary inventory of birds species of REMA25 species captured in mist nets

  • 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 chrysanthavariation of precipitation and temperature phenology of growth ring of deciduous, semi-deciduous and evergreen

    4 months of monitoring

  • Objective 2: Extreme ecosystems adequacies to environmental variationsSpatial patterns: 30 x 30 m plots 200m

  • 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)

  • Objective 2:What changes are there in the community structure and species morpho-physiology in response to changing environmental conditions?

    Factors:Altitud temperaturaPendiente nutrients

    Croton wagneri

    3500 mapped points:- Dependent variables: location, length, crown area

  • Objective 2:How do environmental conditions, interspecific relationships and soil seed bank influence the gap patch dynamic?

    -432 soil samples soil seed bank

    I presented the progress we have developed so far within this project*First, one few notes of dry forest*we know little this ecosystem, your functionality and your structure, however this forest have high levels of endemism. One factor that influenced in this levels of endemism is the

    A pesar de la escasa e incompleta informacin disponible respecto a este ecosistema, se pueden destacar algunas reas que tienen un alto grado de endemismo pero pocas reas protegidas. Lewis et al. (2007 en Pennington et al.) sealan entre esas reas a los valles interandinos de Ecuador. Estas reas deberan ser consideradas prioritarias para la conservacin, sin embargo, no todas reciben la atencin que merecen (Pennington et al. 2007).

    *In grey have the forest losses, how you show in the grafic, the losses in the coast ecosistem is the highest.

    Estos ecosistemas existen como una matriz de parches con diferentes grados de disturbio y recuperacin. Estn ubicados en zonas relativamente pobladas, muchas veces en suelos aptos para cultivos y por tal razn han sido muy intervenidos y destruidos mucho ms que los bosques hmedos (Janzen 1988, Aguirre et al. 2006).

    Los bosques secos han sido explotados de varias maneras, una de estas es la extraccin de una variedad de productos de plantas y animales para el uso local o comercio internacional, que en algunos casos han transformado la estructura de los bosques o dado paso a la extincin local de especies tiles (Bullock et al. 1995). La degradacin y conversin de bosque seco es mucho ms avanzada que la del bosque hmedo, de hecho nicamente una pequea fraccin permanece intacta y el rea conservada es poco perceptible (Bullock et al. 1995 y otras referencias en este).*Analizar los efectos biolgicos del cambio global sobre la dinmica e integridad de los ecosistemas, indicados por cambios en la funcionalidad y estructura de las comunidades.The first step was to obtain information about the structure and diversity of dry ecosystems in the southern region of Ecuador. To spatial level, until today, we have advanced in studying the structure of dry scrub vegetation along an altitudinal gradient.

    Para cumplir con este objetivo se trabajar con dos enfoques uno espacial y uno temporal. *