Projects - dr. UGW (Ute) Sass-Klaassen
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Team member of & Loglife-experiment: Decomposition patterns in coarse wood of 20 European and exotic tree species. Together with Hans Cornelissen (VU) and Mariet Hefting (UU) and numerous experts on wood, soil, animals ...
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Floods and sandstorms - Precision of dendrogeomorphic markers in trees.
This project systematically investigates the factors and mechanisms responsible for changes in tree-ring width and wood anatomy as a result of flooding and sand burial. Experiments are performed to determine the precision of dendrogeomorphic markers. Results from these experiments will be applied in reconstructing flooding and sand deposition and erosion events from trees in situ.
With Paul Copini, Jan den Ouden & Frits Mohren
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ForSEAdiscovery - Application of ecological wood anatomy for provenancing oak and pine wood from Atlantic Iberia.
Unprecedented demands on Iberian oak and pine forests led by increase of ships building in the Age of Discovery (16th to 18th centuries) caused intensive forest logging practices over Iberian Peninsula.
We study xylem structure of Iberian pine and oak species intensively used for shipbuilding, to accomplish already existing time-series and use them for provenancing of ship timber. State-of-the-art approaches will be used to build long time-series from anatomical features and to compute site specific wood-anatomical markers for each study site. Analyses of ship timber will be carried out following the same approach. Provenancing will be done by statistic comparison of time series gained from ship timber with existing and newly developed reference records built up in this study. In addition, samples from living trees and shipwrecks will undergo genetic analyses in order to identify species used for specific parts of the ships.
With Linar Akhmetzyanov, Jan den Ouden & Frits Mohren and colleagues from Spain, Portugal, France, Great Britain.
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STReESS – Studying Tree Responses to extreme a SynthesiS
In this EU COSt Action with34 participating countries we work on response of European tree species to extreme climate conditions. Experts from dendrochronology, wood anatomy, ecophysiology and forest ecology and management regulary meet and develop new research ideas.
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InputDrought - Increasing the potential of economically valuable tree species to survive drought by choosing the optimal provenance.
Climate change is confronting forestry with new challenges as tree species with the ability to acclimate to exacerbated climate conditions have to be identified. The ideal future forest would consist of species coping well with increasing drought and concurrently provide timber of high economic value.
With Britta Eilmann, Jan den Ouden, Paul Copini, Sven de Vries (Alterra), Frank Sterck & Frits Mohren
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Potential hydraulic conductivity of Pinus sylvestris from 15 sites across Europe
Recently, several vital populations of Scotch pine are decreasing in dry areas such as the Mediterranean region and Central Europe. Increasing summer... -
A network of high resolution stem-growth measurements across the Netherlands
In this long-term project, part of the Forest Reserve programme, dendrometers are placed on trees of different species in Nature Reserve areas across... -
Establishment of Hawthorn (Crataegus monogyna L.) in river forelands
Management of river forelands with a focus on water retention for flood prevention and includes the creation of a mosaic landscape, where limited... -
Vessel area of oak - a new proxy to determine changing environments through the Holocene
What is the natural variation in climatic factors throughout the Holocene? How will future climate change affect trees and forests in Europe? These... -
TROFOCLIM - Tropical forests and climate change: understanding links to predict future responses
Tropical forests cover just 7% of the Earth’s surface, but store 25% of the global terrestrial carbon pool and account for a third of net...