Please login first
Thomas Seifert   Professor  Institute, Department or Faculty Head 
Timeline See timeline
Thomas Seifert published an article in August 2018.
Top co-authors
Paxie W Chirwa

33 shared publications

Postgraduate Forest Programme, University of Pretoria, Pretoria, South Africa

Tarquinio Mateus Magalhães

3 shared publications

Departamento de Engenharia Florestal, Universidade Eduardo Mondlane, Maputo, Moçambique

Publication Record
Distribution of Articles published per year 
(2004 - 2018)
Total number of journals
published in
Publications See all
Article 0 Reads 0 Citations Age and weather effects on between and within ring variations of number, width and coarseness of tracheids and radial gr... Sven-Olof Lundqvist, Stefan Seifert, Thomas Grahn, Lars Olss... Published: 30 August 2018
European Journal of Forest Research, doi: 10.1007/s10342-018-1136-x
DOI See at publisher website ABS Show/hide abstract
Annual growth, fibre and wood properties of Norway spruce are all under strong influence from genetics, age and weather. They change dynamically, particularly at young ages. Most genetic research and tree improvement programs are based on data from this most dynamic phase of the life of trees, affected by differences in weather among sites and years. In the work presented, influences of age and weather were investigated and modelled at the detail of annual rings and at the sub-tree ring level of earlywood, transitionwood and latewood. The data used were analysed from increment cores sampled at age 21 years from almost 6000 Norway spruce trees of known genetic origin, grown on two sites in southern Sweden. The traits under investigation were radial growth, cell widths, cell numbers, cell wall thickness and coarseness as a measure of biomass allocation at cell level. General additive mixed models (GAMMs) were fitted to model the influences of age, local temperature and precipitation. The best models were obtained for number of tracheids formed per year, ring width, average radial tracheid width in earlywood, and ring averages for tangential tracheid width and coarseness. Considering the many sources behind the huge variation, the explained part of the variability was high. For all traits, models were developed using both total tree age and cambial age (ring number) to express age. Comparisons indicate that the number of cell divisions and ring width are under stronger control of tree age, but the other traits under stronger control of cambial age. The models provide a basis to refine data prior to genetic evaluations by compensating for estimated differences between sites and years related to age and weather rather than genetics. Other expected applications are to predict performance of genotypes in relation to site or climate and simulation of climate change scenarios.
Article 0 Reads 3 Citations Diversity–biomass relationship across forest layers: implications for niche complementarity and selection effects Sylvanus Mensah, Ben Du Toit, Thomas Seifert Published: 24 April 2018
Oecologia, doi: 10.1007/s00442-018-4144-0
DOI See at publisher website
Article 2 Reads 4 Citations Height – Diameter allometry in South Africa’s indigenous high forests: Assessing generic models performance and function... Sylvanus Mensah, Otto L. Pienaar, Anton Kunneke, Ben Du Toit... Published: 01 February 2018
Forest Ecology and Management, doi: 10.1016/j.foreco.2017.12.030
DOI See at publisher website
Article 5 Reads 0 Citations The effect of surface fire on tree ring growth of Pinus radiata trees Thomas Seifert, Martina Meincken, Benedict O Odhiambo Published: 14 April 2017
Annals of Forest Science, doi: 10.1007/s13595-016-0608-8
DOI See at publisher website
Article 1 Read 2 Citations Potential supply of floral resources to managed honey bees in natural mistbelt forests Sylvanus Mensah, Ruan Veldtman, Thomas Seifert Published: 01 March 2017
Journal of Environmental Management, doi: 10.1016/j.jenvman.2016.12.033
DOI See at publisher website PubMed View at PubMed
Article 0 Reads 2 Citations Comparison of wood, fibre and vessel properties of drought-tolerant eucalypts in South Africa Thomas Grahn, Thomas Seifert, Sven-Olof Lundqvist, Lars Olss... Published: 15 February 2017
Southern Forests: a Journal of Forest Science, doi: 10.2989/20702620.2016.1254910
DOI See at publisher website