Project properties

Title Tapering of vessels in oak – a key feature to explain the dying-off?
Group Forest Ecology and Forest Management Group
Project type thesis
Credits 36-39
Supervisor(s) Dr. U.G.W. (Ute) Sass-Klaassen; Dr. Dr. Ir. J. (Jan) den Ouden
Examiner(s) Prof. Dr. Ir. G.M.J. Mohren
Contact info
Begin date 2018/03/01
End date
Description There is a clear gradient in vessel size when following the same tree ring along a tree with vessel size increasing from the top of the tree towards the stem base. This phenomenon, known as tapering, is related to the hydraulic architecture of trees and seems to be a prerequisite for water transport. Dying-off of oak trees is often reflected in a (strong) reduction in tree-ring width and vessel size. The idea is, that this reduction in vessel size, especially at the stem base, results in ‘break down’ of vessel tapering along the tree with the consequence that water transport becomes impossible and the tree dies.

[Ecophysiology][Tree ring analyses and wood anatomy][The Netherlands][Europe][Temperate]
Used skills Enthusiasm for wood anatomy, dendrochronology, image analysis and time-series analysis.
Requirements FEM-30306 Forest Ecology and Forest Management; TNV-31806 Ecological Methods I;