V
Volkmar Timmermann
Researcher at Norwegian Forest and Landscape Institute
Publications - 39
Citations - 1046
Volkmar Timmermann is an academic researcher from Norwegian Forest and Landscape Institute. The author has contributed to research in topics: Hymenoscyphus fraxineus & Biology. The author has an hindex of 10, co-authored 34 publications receiving 844 citations. Previous affiliations of Volkmar Timmermann include Norwegian Institute for Water Research.
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Tree mineral nutrition is deteriorating in Europe.
Mathieu Jonard,Alfred Fürst,Arne Verstraeten,Anne Thimonier,Volkmar Timmermann,Nenad Potočić,Peter Waldner,Sue Benham,Karin Hansen,Päivi Merilä,Quentin Ponette,Ana C. de la Cruz,Peter Roskams,Manuel Nicolas,Luc Croisé,Morten Ingerslev,Giorgio Matteucci,Bruno Decinti,Marco Bascietto,Pasi Rautio +19 more
TL;DR: In this article, the nutritional status of the main European tree species, to identify growth-limiting nutrients and to assess changes in tree nutrition during the past two decades was analyzed.
Journal ArticleDOI
Ash dieback: pathogen spread and diurnal patterns of ascospore dispersal, with special emphasis on Norway.
TL;DR: In this paper, a spore sampler was installed in a diseased ash stand at As, South-Eastern Norway, and a survey in early summer of the same year revealed that the disease had spread over large parts of the southern and eastern regions of the country.
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Vegetation and soil biota response to experimentally-changed nitrogen inputs in coniferous forest ecosystems of the NITREX project
A.W. Boxman,K. Blanck,Tor-Erik Brandrud,Bridget A. Emmett,Per Gundersen,Rene F. Hogervorst,O. Janne Kjønaas,Hans Persson,Volkmar Timmermann +8 more
TL;DR: The NITREX project as discussed by the authors evaluated the ecological effects of excess N with respect to changes in vegetation and soil biota in a series of experiments along a N gradient across Europe.
Part IV Visual assessment of crown condition and damaging agents
Johannes Eichhorn,Peter Roskams,Nenad Potočić,Volkmar Timmermann,Marco Ferretti,Volker Mues,Andras Szepesi,Dave Durrant,Ivan Seletković,Hans-Werner Schroeck,Seppo Nevalainen,Filippo Bussotti,Paloma Garcia,Sören Wulff +13 more
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The invasive ash dieback pathogen Hymenoscyphus pseudoalbidus exerts maximal infection pressure prior to the onset of host leaf senescence
TL;DR: Shoot dieback disease of European ash caused by the ascomycete Hymenoscyphus pseudoalbidus threatens ash on a continental scale and accumulation of pathogen DNA on leaflets of current-year leaves reached a high level plateau phase before appearance of autumn coloration, suggesting that pathogen establishment in leaves is terminated before the onset of leaf senescence.