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MSc European Forestry Applied Period June – August 2019
Pemelyn Santos Presented by: Supervisors:
- Dr. Dominik Stangler
- Mrs. Elena Larysch
THE CLIMATE IS CHANGING
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Phenology Of Abies alba And Pinus syslvestris Along Altitudinal - - PowerPoint PPT Presentation
Phenology Of Abies alba And Pinus syslvestris Along Altitudinal - - PowerPoint PPT Presentation
MSc European Forestry Applied Period June August 2019 Wood Formation And Tree Growth Phenology Of Abies alba And Pinus syslvestris Along Altitudinal Gradient In The Black Forest Supervisors: Dr. Dominik Stangler Mrs. Elena Larysch
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Pinus sylvestris Abies alba
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Gradient 1
Elevation 450 – 1225masl
1 2 3 4
Gradient 2
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3 trees/sp.
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1 2 3 4 5 7 6 8
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8 Plots
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Increment core Microcore
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Microcores collection
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Cambial cells – thin cell walls and small radial diameters Enlarging cells – larger than cambial cells and had thin walls that were not birefringent under polarized light Cell-wall thickening and lignifying cells were birefringent under polarized light and demonstrated violet and blue walls Previous tree ring Mature cells – Tracheids were considered mature when walls were completely blue.
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- CAVIAR – R Package
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Detecting errors in the dataset
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detect basic errors in data encoding, recording and transfer
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Detecting outliers at the radial file level
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difference between raw cell counts of different radial files from the same tree
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Detecting outliers at the tree level
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difference between the behaviours of different trees from the same group
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Assessing group consistency
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comparing the central tendencies (mean vs median) of tree groups
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Final display of the group trend
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plots the median or the mean cell counts for each selected group
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Multi-panel graph: Cell differentiation phases along the 4 elevations
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- Research in Dendroecology provide new possibilities for a
better understanding of the mechanisms related
to plant growth–environment interactions and better deciphers the information retained in tree-rings.
- Data cleaning and checking – completeness of data
- There are problems with bad quality pictures and broken
samples
- Intensive monitoring of tree samples is needed to have an
adequate information on cambium dynamics
- Recommendation based on the challenges
- Sharp Trephor to have less problem in the quality of the
sample/picture
- Larger hammer when collecting microcores (getting rid
- f breaking the sample)
- CAVIAR – R Package = Naming in Excel/Methods used
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In the coming weeks…
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