Volker Haag

Volker Haag
Thünen Institute | vTI · Institute of Wood Research

PhD - Biology/Woodscience

About

55
Publications
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Citations
Introduction
Research scientist, working since 2013 at the Thünen Institute of Wood Research, Hamburg. My research is focused primarily on wood structure-properties relationships, wood formation and on identification of commercial and (CITES) protected timbers based on structural wood anatomy, as well as the utilization of so-called “lesser known species” (LKS).

Publications

Publications (55)
Article
Illegal logging and illegal timber trade is a global problem. Anatomical, genetic, and chemical techniques support illegal logging legislation by verifying the species and geographic origin of timber. In principle, these methods can be used to identify timber species and the origin of harvest, however, the availability of specific tests for importa...
Article
Molecular research has shown that the genus Acacia is in fact polyphyletic. The discussion about grouping the species of Acacia s.l. into monophyletic genera kept two International Botanical Congresses (Congresses 17 and 18) occupied and resulted in the general acceptance of the genera Acacia , Acaciella , Mariosousa , Senegalia and Vachellia . Thi...
Article
Full-text available
Wissenschaftler des Thünen-Instituts für Holzforschung in Hamburg untersuchten eine berühmte, fast 400 Jahre alte Harfe mit neu entwickelten, zerstörungsfreien Methoden der Holzartenidentifizerung. Die Untersuchung ist Teil eines groß angelegten, interdisziplinären Forschungsprojektes mit dem Ziel einer Rekonstruktion dieses einzigartigen Instrumen...
Conference Paper
Full-text available
Seit 2016 werden am Thünen-Institut für Holzforschung routiniert Holzartenidentifizierungen an Holzkohle und Briketts durchgeführt. Mit Hilfe der anatomischen Untersuchungen kann überprüft werden, ob die Deklarationen auf den Verpackungen der Warenmuster korrekt sind. Zudem können die Herkunftsangaben über die Verbreitungsgebiete der bestimmten Tax...
Technical Report
Full-text available
Hintergrund und Zielsetzung Vor dem Hintergrund einer nachhaltigen explorativen Nutzung der peruanischen Holzvorräte sollen die lokalen Institutionen CITEmadera und CITEforestal bei der Ausbildung von Expert*innen für den peruanischen Forst- und Holzwirt-schaftssektor und das Handwerk unterstützt werden. Ziel des von der Deutschen Gesellschaft für...
Technical Report
Full-text available
Background and aims Against the background of a sustainable exploratory use of Peruvian timber resources, the local institutions CITEmadera and CITEforestal are to be supported in the training of experts for the Peruvian forestry and timber industry sector and crafts. The aim of the project financed by the German Association for International Coope...
Chapter
The non-destructive anatomical investigation of the structural features for wood identification was carried out with a high resolution 3D reflected light microscope (Keyence type: VHX 5000). This special microscope uses integrated image analysis software which enables the generation of a flat surface for observation of the structural features[1, 2]...
Article
Full-text available
Key message Wavy grain, a rare figure type of wood, leads to highly priced timber in Acer pseudoplatanus L. The influence of this trait on growth performance and its causes are not known. Analyzed wavy and straight grain sycamore maple progenies show comparable growth performance in a field trial. Stability of wavy grain after vegetative propagatio...
Article
Full-text available
For millions of people in Europe, barbecuing during the summer months is a popular and frequent pastime, often with traditional charcoal. But few barbe- cue enthusiasts realise that the charcoal they use comes mostly from dubious sources in Eastern Europe or tropical regions. In these countries, charcoal production drives deforestation, threaten...
Data
Aproximadamente la mitad de la madera extraída a nivel mundial se utiliza para producir energía y alrededor del 17 % se convierte en carbón vegetal. A menudo se origina en países que se lidian con la tala ilegal, la destrucción de bosques y la corrupción. El sector del carbón vegetal que se encuentra en continuo crecimiento genera ingresos para más...
Presentation
Full-text available
Oportunidades y límites de la identificación anatómica de la madera, isótopos estables y métodos genéticos como herramienta para la regulación del comercio internacional de madera
Data
CHARCOAL MOVIE --- About half the wood extracted worldwide is used to produce energy and about 17 percent of it is converted to charcoal. Often it originates from countries dealing with illegal logging, forest destruction, and corruption. The continuously growing global charcoal sector generates income for more than 40 million people. It is large...
Article
Full-text available
Für Millionen Menschen in Europa ist Grillen während der warmen Jahreszeit ein beliebtes und regelmäßiges Freizeitritual, oft mit dem klassischen Kohle- grill. Doch kaum ein Grillfan ahnt, dass die Holzkohle, die er verwendet, zumeist aus zweifelhaften Quellen in Osteuropa oder aus tropischen Gebieten stammt. Dort treibt ihre Herstellung die Ent...
Article
About half the wood extracted worldwide from forests is used as fuelwood to produce energy, about 17 percent is converted to charcoal (FAO 2017) which represents one of the least controlled/monitored segments of the European timber market. Although charcoal has a significant share on the European market of wood-based products it is not yet covered...
Article
Full-text available
The present study focusses on the application of 3D-reflected light microscopy (3D-RLM) for the wood anatomical identification of charcoal specimens produced from domestic and tropical timbers. This special microscopic technique offers a detailed investigation of anatomical features in charcoal directly compared with the quality of field emission s...
Method
Full-text available
Today we have five types of timber tracking tools available. Each has its own strengths and limitations (see the Timber Tracking Tool Infogram), but together they offer a broad range of methods that can assist us in identifying the botanical as well as the geographic origin (provenance) of most kinds of timber samples, even those smaller than 1 cm³...
Presentation
Grilling with charcoal is the trend. According to figures from the German Federal Statistical Office, consumption in Germany in 2016 was 250,000 tonnes – and rising. Most of the wood used does not come from "domestic forests". Around 85 % of the sold charcoal is imported from abroad, often from tropical and subtropical regions, but also from Easter...
Article
Cedrelinga cateniformis (tornillo) is a timber species of the South American Amazon Basin. In its natural distribution area, the wood has various local uses, such as furniture, art work, door and window frames, and light construction. In order to promote this lesser known species for high valued applications on the international market, wood anatom...
Presentation
Presentation dealing with timber trade developments and important outdoor species - Experience reports from practical application
Presentation
Presentation dealing about Natural Durability and Characteristical Properties of Wood Species for outdoor applications - Experience reports from practical applications.
Thesis
As a consequence of globalized timber markets, overexploitation of primarily tropical tree species and relocation of industrial production facilities, new or unknown wood species, so-called "lesser known species", have been increasingly imported into the European market. Regular evaluations at the Thünen Institute of Wood Research reveal that 20 to...
Article
Anatomical and subcellular characteristics of juvenile and adult wood of seven species ( Manilkara zapota (L.) P. Royen, Platymiscium yucatanum Standl., Lonchocarpus castilloi Standl., Roseodendron donnell-smithii (Rose) Miranda, Terminalia buceras (L.) Wright, Tabebuia rosea (Bertol.) DC., Lysiloma latisiliquum (L.) Benth. from Mexico, including a...
Presentation
Full-text available
German environmental organizations and media frequently report, that charcoal/-briquettes used for barbecue are not manufactured - as generally assumed - from local forests. About 70% is imported charcoal from other European countries or even from tropical countries on a large scale. The wood used for charcoal production in West Africa and South Am...
Presentation
German environmental organizations and media frequently report, that charcoal/-briquettes used for barbecue are not manufactured - as generally assumed - from local forests. About 70% is imported charcoal from other European countries or even from tropical countries on a large scale. The wood used for charcoal production in West Africa and South Am...
Article
Full-text available
Seit Jahrhunderten ranken sich Mythen und Legenden um das besondere Wissen der histori-schen Musikinstrumentenbauer. Jede Instrumentengattung hat dabei seine eigenen Meister, deren berühmte Namen wie Stradivari (für den Geigenbau), Antonio de Torres (Erfinder der klassischen „spanischen“ Gitarre) oder den der Hamburger Pianomanufaktur „Steinway and...
Method
Full-text available
This is a guide for the collection of reference samples of trees to enable the identification of species and/or geographical origin of woody material. To enable the implementation of the different laws regulating the trade in illegal wood, reference databases for various timber tracking tools are urgently needed for at least the most traded and e...
Presentation
In the presentation Volker Haag gives a practical overview how to use the „anatomical fingerprint“ for the identification of timbers by using computer aided identification systems. In context of the event a violin and five violin bows were studied a few weeks before the workshop. The results of this investigation will be presented practically by us...
Presentation
The implementation of the 2013 established timber regulations requires reliable control mechanisms for a doubtless identification of the internationally traded wood and wood products. The clear identification of the timber is also important for the assessment of product properties “consumer protection” as lower-grade substitute timbers are imported...
Book
The present paper describes two technical approaches and practical applications of non-destructive microscopic investigation methods which are ideally suited for wood identification and dendrochronological measurements of cultural (heritage) objects, e.g. musical instruments. 3D-reflected-light microscopy enables the scientist to study individual c...
Poster
Für die Holzartenidentifizierung historischer Musikinstrumente wird am Thünen-Institut die 3D-Auflichtmikroskopie-Technik verwendet, mit der eine zerstörungsfreie Begutachtung diagnostischer Strukturmerkmale im Holz möglich ist. Dabei werden die Holzoberflächen hochauflösend gescannt und Aufnahmen mit einer hohen Qualität und Schärfe erstellt, die...
Presentation
El objetivo del Taller de Anatomía de la Madera fue capacitar a un grupo de aproximadamente 20 personas que se ocupan de la identificación de la madera en silvicultura, biología de la madera o areas relacionadas de maderas comerciales para el mercado internacional respecto a aspectos básicos de la anatomía de la madera (análisis estructural) y la i...
Presentation
El objetivo del Taller de Anatomía de la Madera fue capacitar a un grupo de aproximadamente 20 personas que se ocupan de la identificación de la madera en silvicultura, biología de la madera o areas relacionadas de maderas comerciales para el mercado internacional respecto a aspectos básicos de la anatomía de la madera (análisis estructural) y la i...
Presentation
El objetivo del Taller de Anatomía de la Madera fue capacitar a un grupo de aproximadamente 20 personas que se ocupan de la identificación de la madera en silvicultura, biología de la madera o areas relacionadas de maderas comerciales para el mercado internacional respecto a aspectos básicos de la anatomía de la madera (análisis estructural) y la i...
Presentation
Anticipation on the increasing demand for timber checks and on the need for a reliable expert database: Opportunities and limits of Macroscopic and Microscopic Wood Identification against illegal logging
Presentation
Basics of Wood Anatomy - the Role of Macroscopic and Microscopic Wood Identification against illegal logging
Presentation
Wood Anatomy and Computer Aided Identification of timbers in Europe. The Thuenen Centre of Competence on the origin of timbers.
Conference Paper
Full-text available
This paper describes the technical approach and practical application of a new non-destructive microscopic identification method which is ideally suited for the wood identification of cultural (heritage) objects, e.g. music instruments. 3D-reflected-light microscopy enables the scientist to study individual components in historical instruments with...
Presentation
This presentation describes the technical approach and practical application of a new non-destructive microscopic identification method which is ideally suited for the wood identification of cultural (heritage) objects, e.g. musicinstruments. 3D-reflected-light microscopy enables the scientist to study individual components in historical instrument...
Article
Full-text available
Der Artikel stellt die Ergebnisse der umfangreichen Untersuchungen des Thünen Instituts für Holzforschung von Holzkohle und Briketts auf dem europäischen Holzmarkt (Stand 2017) dar. Verbraucher- und Umweltschutzorganisationen, aber auch Händler und Importeure haben das Thünen-Kompetenzzentrum seit 2016 mehrfach um Prüfung von handelsüblichen Holzko...
Presentation
Traditional violin and guitar builders consider it a fact that the bridge, which transfers the vibrations of the strings to the resonance board, has a signifi-cant influence on the sound of the instrument. In this context, one can as-sume that different timber species produce a defined sound which can be related to the anatomical structure of the w...
Presentation
Anatomische Holzartenbestimmung in der Praxis Erfahrungen und Anforderungen seit Einführung der Europäischen Holzhandelsverordnung (EUTR)
Presentation
SUPPORTING THE CLOSE-TO-NATURE FOREST MANAGEMENT BY SMALL AND MEDIUM FOREST OWNERS AND FLEGT-VPA PROCESSORS IN VIET NAM
Article
Full-text available
As a contribution to global forest protection international laws and timber regulations are currently enacted, such as the USA Lacey Act, the European Timber regulation (EUTR) and, most recently, the Illegal Logging Prohibition Act in Australia. All such regulations prohibit the import and trade of illegally forested wood and wood products. Regardi...
Article
Full-text available
Zusammenfassung: Als Beitrag zum globalen Schutz der Wälder wurde im März 2013 die Europäische Holzhandelsverordnung (EUTR) erlassen. Sie verbietet den Import und den Handel mit illegal eingeschlagenem Holz und verpflichtet alle Marktteilnehmer, die innerhalb der EU Holz oder Holzprodukte erstmalig in Verkehr bringen, bestimmte Sorgfaltspflichten e...
Presentation
European Timber Regulation (EUTR) - the role of macroscopic and microscopic wood identification against illegal logging
Presentation
Introduction: Wood Anatomy and EUTR as tool for legal timber trade in Europe
Thesis
Die vorliegende Arbeit ist Teil eines Projektes der International Tropical Timber Organisation (ITTO), dessen zentraler Inhalt die Entwicklung und Etablierung von Methoden zur Holzarten- und Herkunfts-bestimmung ist. Hintergrund ist die Umsetzung internationaler Richtlinien und Gesetze, die zum ei-nem dem Artenschutz und der Erhaltung gefährdeter Ö...
Presentation
Basics of wood Identification
Thesis
Der boreale Nadelwald bildet mit etwa 1,3 Milliarden Hektar das größte zusammenhängende Waldgebiet der Erde und bedeckt etwa 13 Prozent der Festlandes (Forest Resources Assessment FAO, 2010). Vom Weltall aus kann man um die Nordhalbkugel der Erde einen zirkumpolar verlaufenden Grüngürtel erkennen. Er reicht etwa vom 50. bis zum 70. nördlichen Breit...

Questions

Question (1)
Question
Does anybody know of, or have a method suitable for sectioning very hard organic plant parts such as nut shells (e.g., coconut, walnut) and kernels (e.g.,olives) with a microtome? We want to soften the material without forfeiting details of cell structure and the intercellular bond. Any experience / advice / recommendations for dealing with such sclerotic tissues would be very welcome.

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Cited By

Projects

Projects (6)
Project
About half the wood extracted worldwide is used to produce energy and about 17 percent of it is converted to charcoal. Often it originates from countries dealing with illegal logging, forest destruction, and corruption. The continuously growing global charcoal sector generates income for more than 40 million people. It is largely informal and therefore inefficient. Hence governments forgo billions of dollars in revenue. With an amount of approx. 30%, the illegal timber trade also contributes significantly to deforestation and thus to accelerated climate change and species loss. Up to now, there are very few legislative regulations for the international charcoal trade. One of the main problems is the comprehensible identification of the processed timber species and the origin of the charcoal. The Thünen Institute of Wood Research in Hamburg is one of the leading Institutes in the field of wood identification based on anatomical structural features, the “wood anatomy”. A very special field of wood species identification is the identification of charcoal and briquettes. Charcoal cannot be processed like normal wood because it is not possible to produce microscopic slides as used for classical microscopic investigations of wood. The Thünen Institute uses a modern 3D-technology in which 3-dimensional scans are converted into 2-dimensional images. By using 3D-reflected light microscopy, the uneven surfaces are digitally scanned and, as a first step, three-dimensional representations are created that are converted into two-dimensional images in a second step. Based on the 3D investigation, the charcoal samples can usually be assigned to genus or family level and in this context also provide limited information about the origin. This research makes an important contribution to the understanding of the international charcoal trade may serve as a motive and source for the inclusion of charcoal in the respective annex to the EUTR (European Timber Regulation). For further questions you are welcome to contact Dr. rer. nat. Volker Haag.
Project
The PhD-project of Valentina Zemke is funded by the German Federal Environmental Foundation / DBU German environmental organizations and media frequently report, that charcoal/-briquettes used for barbecue are not manufactured - as generally assumed - from local forests. About 70% is imported charcoal from other European countries or even from tropical countries on a large scale. The wood used for charcoal production in West Africa and South America is often harvested from natural forests without proof of sustainability or legality. Basic investigation of the Thuenen Institute has shown that many trade assortments are misclassified and regularly contain tropical wood species. Against this background, it is currently under examination whether charcoal and charcoal briquettes should be also included and controlled according to the European Timber Regulation (EUTR). Based on the investigation and experience of the Thuenen Centre of Competence on the Origin of Timber the references for the identification of tropical timbers in charcoal need to be extended. Furthermore, the methods for their identification are more difficult as compared to the “classic” anatomical wood identification of solid woods. A successful method (by) using 3D-refelected light microscopy is currently established at the Thuenen Institute and will be applied as part of a research project, which is supported by the German Federal Environmental Foundation (DBU), with the following objectives: - analyses and description of wood anatomical structures of wood species used for charcoal international markets of leading production regions (Europe, South America, Southeast Asia and Central Africa) on the basis of 3D light microscopy. - studies of controlled carbonization processes for a systematic detection of artefacts related to the diagnostic anatomical structures of charcoal by using 3D light microscopy. - preparation of a list of anatomical features for the characterization of charcoal and regional classification of boreal-/temperate latitudes and subtropical-/ tropical latitudes of charcoal. - development of digital datasheets based on the evaluation of anatomical features (anatomical fingerprint) as references for international research institutes, customs controls, etc., which are involved in the identification and control of charcoal and charcoal briquettes. The aim of the present work is focused on the development of methodological and scientific basics for the identification and control of charcoal in accordance with the requirements and guidelines of the EUTR and thus to contribute to the protection of endangered tree species.
Project
The project consists of scientific, capacity building and knowledge transfer activities. The Thünen Institute of International Forestry and Forest Economics is responsible for conducting research activities within the project which is jointly implemented together with, WWF and HessenForst. The main goal of the scientific component is to analyze factors that influence forest owners’ decisions to increase rotation periods of acacia plantations in order to produce higher quality timber, as well as understanding the incentives of forest owners to join forest owner associations. This in turn will help policy-makers to take informed decisions on future policy developments in the field of sustainable forest management. Target Group Small-scale acacia plantation owners in the provinces Quang Tri, Quang Nam and Thua Thien Hue, Central Vietnam. Approach Analytical techniques involve descriptive statistics and econometric household farm modelling based on own data collected in the study region (18 communes in the provinces of Quang Tri, Quang Nam and Thua Thien Hue).