Forestry & Wood Science
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ACKERMAN SA, MCDERMID HL, ACKERMAN PA, TERBLANCHE M. The effectiveness of a small-scale combination harvester/forwarder in industrial plantation first thinning operations. International Journal of Forest Engineering 2022; 33(1):56-65.

ACKERMAN SA, TALBOT BE, ASTRUP R. The effect of tree and harvester size on productivity and harvester investment decisions. International Journal of Forest Engineering 2022; 33(1):22-32.​

SAUNDERS A, DREW DM. Measurements done on excised stems indicate that hydraulic recovery can be an important strategy used by Eucalyptus hybrids in response to drought. Trees - Structure and Function 2022; 36:139-151.


ACHEAMPONG JB, DE ANGELIS M, KRAUSE A, MEINCKEN M. The effect of raw material selection on physical and mechanical properties of wood plastic composites made from recycled LDPE and wood from invasive trees in South Africa. Wood Material Science and Engineering 2021; 16(2):118-123.​

CHIMPHANGO A, AMIANDAMHEN SO, GORGENS JF, TYHODA L. Prospects for Paper Sludge in Magnesium Phosphate Cement: Composite Board Properties and Techno-Economic Analysis. Waste and Biomass Valorization 2021; 12:5211-5233.

DOVEY S, DU TOIT B, CROUS J. Tier 2 above-ground biomass expansion functions for South African plantations forests. Southern Forests: A Journal of Forest Science (Southern Hemisphere Forestry Journal) 2021; 1:69-78.

DREW DM. Exploring new frontiers in forecasting forest growth, yield and wood property variation. Annals of Forest Science 2021; 78(2):29-30.

GENG Y, YUE Q, ZHANG C, ZHAO XH, VON GADOW K. Dynamics and drivers of aboveground biomass accumulation during recovery from selective harvesting in an uneven-aged forest. European Journal of Forest Research 2021; 140:1163-1178.

GOVENDER P, MAJEKE BM, ALAWODE AO, GORGENS JF, TYHODA L. The Use of South African Spent Pulping Liquor to Synthesize Lignin Phenol-Formaldehyde Resins. Forest Products Journal 2021; 70(4):503-511.

HAO M, VON GADOW K, ALAVI SJ, ALVAREZ-GONZALEZ JG, BALUARTE-VASQUEZ JR, CORRALRIVAS JJ, HUI G, KOROL M, KUMAR R, LIANG J, MEYER P, REMADEVI OK, KAKKAR R, LIU W, ZHAO X, ZHANG C. A classification of woody communities based on biological dissimilarity. Applied Vegetation Science 2021; 24(1):1-10.

LARYSCH E, STANGLER DF, NAZARI M, SEIFERT T, KAHLE HP. Xylem Phenology and growth Response of European Beech, Silver fir and scots Pine along an Elevational Gradient during the Extreme Drought Year 2018. Forests 2021; 12(1):75.

MAJEKE BM, COLLARD FX, TYHODA L, GORGENS JF. The synergistic application of quinone reductase and lignin peroxidase for the deconstruction of industrial (technical) lignins and analysis of the degraded lignin products. Bioresource Technology 2021; 319:1-9.

MARAIS EM, LE ROUX A. Two new species of Pelargonium (Geraniaceae) from the Western and Northern Cape Provinces (South Africa) and their position within P. section Hoarea. Phytotaxa 2021; 516(1):92-100.

MEINCKEN M, ROUX GW, NIESLER TR. An African violin - The feasibility of using indigenous wood from Southern Africa as tonewood. South African Journal of Science 2021; 117(11/12):1-8.

MOHAMMED AS, MEINCKEN M. Properties of Low-Cost WPCs Made from Alien Invasive Trees and rLDPE for Interior Use in Social Housing. Polymers 2021; 13(15):2436.

NAGHIZADEH MAHANI Z, WESSELS CB. The effect of water availability on growth strain in Eucalyptus grandis-urophylla trees. Forest Ecology and Management 2021; 483(3):118926.

NEL A, ACOSTA JJ, HODGE GR. Initial growth results comparing first generation F1 and advanced-generation F2 Pinus patula x Pinus tecunumanii interspecific hybrid families. Southern Forests: A Journal of Forest Science (Southern Hemisphere Forestry Journal) 2021; 83(2):170-176.

NOCETTI M, AMINTI G, WESSELS CB, BRUNETTI M. Applying Machine Strength Grading System to Round Timber Used in Hydraulic Engineering Works. Forests 2021; 12(3):281.

OBLADEN N, DECHERING P, SKIADARESIS G, TEGEL W, KEGLER J, HOLLERL S, KAPS S, HERTEL M, DULAMSUREN C, SEIFERT T, HIRSCH M, SEIM A. Tree mortality of European beech and Norway spruce induced by 2018-2019 hot droughts in central Germany. Agricultural and Forest Meteorology 2021; 307(8):12 pages.

OLAYIWOLA HO, AMIANDAMHEN SO, MEINCKEN M, TYHODA L. Investigating the suitability of fly ash/metakaolin-based geopolymers reinforced with South African alien invasive wood and sugarcane bagasse residues for use in outdoor conditions. European Journal of Wood and Wood Products/Holz als Roh - and Werkstoff 2021; 17(1):1-17.

PRETZSCH H, RAIS A, MALHERBE GF, RUANO A, LAMBRECHTS H, UHL E, DU TOIT B. Structure, growth and growing space efficiency of Pinus radiata (D. DON) trees as effected by their social position. Southern Forests: A Journal of Forest Science (Southern Hemisphere Forestry Journal) 2021; 83(2):158-169.

QIAO X, ZHANG N, ZHANG C, ZHANG Z, ZHAO XH, VON GADOW K. Unravelling biodiversity­ productivity relationships across a large temperate forest region. Functional Ecology 2021; 35(12):2808-2820.

QIN J, GENG Y, LI X, ZHANG C, ZHAO XH, VON GADOW K. Mycorrhizal type and soil pathogenic fungi mediate tree survival and density dependence in a temperate forest. Forest Ecology and Management 2021; 496:8 pages.

RECKZIEGEL RB, SHEPPARD JP, KAHLE HP, LARYSCH E, SPIECKER H, SEIFERT T, MORHART C. Virtual pruning of 3D trees as a tool for managing shading effects in agroforestry systems. Agroforestry Systems 2021; Online:1-16.

SAUNDERS A, DREW DM, BRINK WH. Machine learning models perform better than traditional empirical models for stomatal conductance when applied to multiple tree species across different forest biomes. Trees, Forests and People 2021; 6:100139.

SAUNDERS A, DREW DM. Stomatal responses of Eucalyptus ssp. under drought can be predicted with a gain-risk optimisation model. Tree Physiology 2021; 0:1-16.

SIBIYA ZB, ACKERMAN PA, ACKERMAN SA. Productivity and workload analysis between manual and motor-manual pruning of Pinus patula at two different lifts. International Journal of Forest Engineering 2021; 32(3):191-210.

STANGLER DF, KAHLE HP, RADEN M, LARYSCH E, SEIFERT T, SPIECKER H. Effects of Intra-Seasonal Drought on Kinetics of Tracheid Differentiation and Seasonal Growth Dynamics of Norway Spruce along an Elevation Gradient. Forests 2021; 12(3):274.

TAN L, FAN CY, ZHANG C, ZHAO XH, VON GADOW K. Comparing the relative effects of species and size structure on forest productivity in different local environments. Scandinavian Journal of Forest Research 2021; 36(2-3):188-197.

UISSO AJ, CHIRWA WP, ACKERMAN PA. Forest management and conservation under the REDD + initiative: community perspectives across an altitudinal gradient in the Rubeho Mountain Ecosystem in Tanzania. SN Social Science 2021; 1(286):1-24.

UISSO AJ, CHIRWA PW, ACKERMAN PA, MBWAMBO L. Non-carbon benefits as incentives for participation in REDD + and the role of village participatory land use plans in supporting this: insights from Kilosa District, Tanzania. Journal of Environmental Planning and Management 2021; 64(6):1111-1132.

WU Z, FAN C, ZHANG C, ZHAO XH, VON GADOW K. Effects of biotic and abiotic drivers on the growth rates of individual trees in temperate natural forests. Forest Ecology and Management 2021; 503(9):7 pages.

YU C, FAN C, ZHANG C, ZHAO XH, VON GADOW K. Decomposing Spatial P-Diversity in the temperate forests of Northeastern China. Ecology and Evolution 2021; 11(16):11362-11372.​


ALAVI SJ, VEISKARAMI R, ESMAILZADEH O, VON GADOW K. Analyzing the Biological and Structural Diversity of Hyrcanian Forests Dominated by Taxus baccata L. Forests 2020; 10(6):11060701, 17 pages.

ALAWODE AO, AMIANDAMHEN SO, JOUBERT L, MEINCKEN M, TYHODA L. Performance evaluation of a natural based adhesive derived from Irvingia wood species kernel extracts on wood panel production. Journal of Adhesion Science and Technology 2020; 34(9):1-18.

ALAWODE AO, ESELEM BUNGU PS, AMIANDAMHEN SO, MEINCKEN M, TYHODA L. Evaluation of Irvingia Kernels Extract as Biobased Wood Adhesive. Journal of Wood Science 2020; 66(12); 13 pages.

AMIANDAMHEN SO, MEINCKEN M, TYHODA L. Natural Fibre Modification and its Influence on Fibre-Matrix Interfacial Properties in Biocomposite Materials. Fibers and Poylmers 2020; 21(4):677-689.

CHARLTON RA, NAGHIZADEH MAHANI Z, HAM C, WESSELS CB. A Value Chain Comparison of Pinus Patula Sawlog Management Regimes Based on Different Initial Planting Densities and Effect on Wood Quality. Forest Policy and Economics 2020; 111:102067, 11 pages.

CHARLTON RA, NAGHIZADEH MAHANI Z, KUNNEKE A, WESSELS CB. The Effect of Planting Density on The Stem Form of Pinus Patula Trees. Southern Forests: A Journal of Forest Science (Southern Hemisphere Forestry Journal) 2020; 82(1):70-74.

CRAFFORD PL, WESSELS CB. South African Log Resource Availability and Potential Environmental Impact of Timber Construction. South African Journal of Science 2020; 116(7/8):1-8.

DE CAUWER V, BEECKMAN H, KLEINN CWD, MOSES M, NOTT A, SEIFERT T, MUYS B. Improving the Knowledge Base for Tropical Dry Forest Management in Southern Africa: Regional Volume Models for Pterocarpus AngolensisForest Ecology and Management 2020; 477:118485, 14 pages.

DU TOIT B, SCHEEPERS GP. Modelling Soil Nitrogen Mineralisation in Semi-Mature Pine Stands of South Africa to Identify Nutritional Limitations and to Predict Potential Responses to Fertilisation. Annals of Forest Science 2020; 77(24), 14 pages.

ERASMUS J, DREW DM, WESSELS CB. The Flexural Lumber Properties of Pinus Patula Schiede ex Schltdl. & Cham. Improve with Decreasing Initial Tree Spacing. Annals of Forest Science 2020; 77:73, 15 pages.

ERASMUS J, WESSELS CB. The Effect of Stand Density Management on Pinus Patula Lumber Properties . European Journal of Forest Research 2020; 139:247-257.

FAN C, TAN L, ZHANG C, ZHAO XH, GAO L, VON GADOW K. Scale-Dependent Effects of Neighborhood Biodiversity on Individual Tree Productivity in a Coniferous and Broad-Leaved Mixed Forest in China. Ecology and Evolution 2020; 10:8225-8234.

GAGLIARDI KN, ACKERMAN SA, ACKERMAN PA. Multi-Product Forwarder-Based Timber Extraction: Time Consumption and Productivity Analysis of Two Forwarder Models Over Multiple Products and Extraction Distances. Croatian Journal of Forest Engineering 2020; 41(2):231-242.

HAO M, MESSIER C, GENG Y, ZHANG C, ZHAO XH, VON GADOW K. Functional Traits Influence Biomass and Productivity Through Multiple Mechanisms in a Temperate Secondary Forest. European Journal of Forest Research 2020; 139:959-968.

HIRSCH H, ALLSOPP MH, CANAVAN S, CHEEK M, GEERTS S, GELDENHUYS CJ, HARDING G, HURLEY BP, JONES W, KEET J, KLEIN H, RUWANZA S, VAN WILGEN BW, WINGFIELD MJ, RICHARDSON DM. Eucalyptus camaldulensis in South Africa - past, present, future. Transactions of the Royal Society of South Africa 2020; 75(1):1-22.

JACOBSON MG, HAM C. The (Un)broken Promise of Agroforestry: A Case Study of Improved Fallows in Zambia. Environment Development and Sustainability 2020; 22:8247-8260.

KOTZE JDF, BEUKES HB, SEIFERT T. Designing an Optimal Sampling Strategy for a National Level Invasive Alien Plant Assessment: A South African Case Study. Ecological Indicators 2020; 119:106763,11 pages.

LIN HT, LAM TY, VON GADOW K, KERSHAW JR JA. Effects of Nested Plot Designs on Assessing Stand Attributes, Species Diversity, and Spatial Forest Structures. Forest Ecology and Management 2020; 457:117658, 8 pages.

MENSAH S, SALAKO VK, ASSOGBADJO AE, KAKAI RG, SINSIN B, SEIFERT T. Functional Trait Diversity is A Stronger Predictor of Multifunctionality than Dominance: Evidence from an Afromontane Forest in South Africa. Ecological Indicators 2020; 115:106415, 11 pages.

MENSAH S, SALAKO VK, SEIFERT T. Structural Complexity and Large-Sized Trees Explain Shifting Species Richness and Carbon Relationship Across Vegetation Types. Functional Ecology 2020; 34:1731-1745.

MILLER TB, STANGLER DF, LARYSCH E, SEIFERT T, SPIECKER H, KAHLE HP. Plasticity of Seasonal Xylem and Phloem Production of Norway Spruce Along an Elevational Gradient. Trees - Structure and Function 2020; 34:1281-1297.​

MULENGA C, CLARKE CE, MEINCKEN M. Physiological and Growth Responses to Pollutant-Induced Biochemical Changes in Plants: A Review. Pollution 2020; 6(4):827-848.

MUNALULA F, SEIFERT T, MEINCKEN M. Inter-Annual Growth Response of Three Miombo Tree Species to Climatic Effects. Southern Forests: A Journal of Forest Science (Southern Hemisphere Forestry Journal) 2020; 82(2):135-147.

PADILLA-MARTINEZ JB, CORRAL-RIVAS JJ, BRISENO-REYES J, PAUL C, LOPEZ-SERRANO PM, VON GADOW K. Patterns of Density and Production in the Community Forests of the Sierra Madre Occidental, Mexico. Forests 2020; 11(3):307, 14 pages.

PAGEL CL, LENNER R, WESSELS CB. Investigation into Material Resistance Factors and Properties of Young, Engineered Eucalyptus Grandis Timber. Construction and Building Materials 2020; 230:117059, 10 pages.

SCHEEPERS GP, DU TOIT B. Soil Water Deficit as a Tool to Measure Water Stress and Inform Silvicultural Management in the Cape Forest Regions, South Africa. iForest-Biogeosciences and Forestry 2020; 13:473-481.

SHEPPARD JP, RECKZIEGEL RB, BORRASS L, CHIRWA PW, CUARANHUA CJ, HASSLER SK, HOFFMEISTER S, KESTEL F, MAIER R, MALICKE M, MORHART C, NDLOVU NP, VESTE M, FUNK R, LANG F, SEIFERT T, DU TOIT B, KAHLE HP. Agroforestry: An Appropriate and Sustainable Response to a Changing Climate in Southern Africa? Sustainability 2020; 12:12176796, 32 pages.

STERENCZAK K, ZAPLATA R, WOJCIK J, KRASZEWSKI B, MIELCAREK M, MITELSZTEDT K, BIALCZAK M, KROK G, KUBERSKI L, MARKIEWICZ A, MODZELEWSKA A, PARKITNA K, PIASECKA Z, PILCH K, RZECZYCKI K, SADKOWSKI R, WIETECHA M, RYSIAK P, VON GADOW K, CIESZEWSKI CJ. ALS-Based Detection of Past Human Activities in the Białowieza Forest - New Evidence of Unknown Remains of Past Agricultural Systems. Remote Sensing 2020; 10:3390, 23 pages.

TAN L, ZHANG P, ZHAO XH, FAN C, ZHANG C, YAN Y, VON GADOW K. Analysing Species Abundance Distribution Patterns Across Sampling Scales in Three Natural Forests in Northeastern China. iForest-Biogeosciences and Forestry 2020; 13:482-489.

VAN NIEKERK PB, DREW DM, DOVEY SB, DU TOIT B. Allometric Relationships to Predict Aboveground Biomass of 8–10-Year-Old Eucalyptus grandis × E. nitens in South-Eastern Mpumalanga, South Africa. Southern Forests: A Journal of Forest Science (Southern Hemisphere Forestry Journal) 2020; 82(1):15-23.

VESTE M, LITTMANN T, KUNNEKE A, DU TOIT B, SEIFERT T. Windbreaks as Part of Climate-Smart Landscapes Reduce Evapotranspiration in Vineyards, Western Cape Province, South Africa. Plant, Soil and Environment 2020; 66(3):119-127.

WENHOLD RM, ACKERMAN PA, ACKERMAN SA, GAGLIARDI KN. Skills Development of Mechanized Softwood Sawtimber Cut-to-Length Harvester Operators on the Highveld of South Africa. International Journal of Forest Engineering 2020; 31(1):9-18.

WESSELS CB, NOCETTI M, BRUNETTI M, CRAFFORD PL, PROELLER M, DUGMORE MK, PAGEL CL, LENNER R, NAGHIZADEH MAHANI Z. Green-Glued Engineered Products from Fast Growing Eucalyptus Trees: A Review. European Journal of Wood and Wood Products/Holz als Roh - und Werkstoff 2020; 78:933-940.

YUE Q, HAO M, LI X, ZHANG CY, VON GADOW K, ZHAO XH. Assessing Biotic and Abiotic Effects on Forest Productivity in Three Temperate Forests. Ecology and Evolution 2020; 10:7887-7900.

ZHANG C, HE F, ZHANG​ Z, ZHAO XH, VON GADOW K. Latitudinal Gradients and Ecological Drivers of β-Diversity Vary Across Spatial Scales in a Temperate Forest Region. Global Ecology and Biogeography 2020; 29:1257-1263.

Doctoral degrees completed


Da Costa Alpoim GD. The Interaction Between Site, Harvest Residue Management And Plant Stock Quality On Eucalyptus Transplant Survival, Growth And Uniformity In Kwazulu-Natal, South Africa. PhD, 2021. 322 pp. Supervisor: DU TOIT B.  Co-Supervisor: LITTLE K.

Olayiwola HO. Development of geopolymer bonded wood composites. PhD, 2021. 149 pp. Supervisor: TYHODA L. Co-Supervisor: MEINCKEN M.


Erasmus J. Modelling the effect of stand density management and environmental variables on Pinus patula wood properties. PhD, 2020. 117 pp. Supervisor: WESSELS CB. Co-Supervisor: DREW DM.​

Masters degrees completed


Kunneke A. A comparison of harvester head data with terrestrial laser scanner and manual measurements. MSc. 2021. 57 pp. Supervisor: TALBOT B. Co-Supervisor: SEIFERT T.​

Makoto M. Evaluation of a mechanized CTL harvesting system in different geometric thinning operations in terms of productivity, cost, biomass conversion, residual stand damage and spacing uniformity. MSc. 2021. 105 pp. Supervisor: TALBOT B. Co-Supervisor: ACKERMAN S.

Mbhamali NQ. Evaluating the influence of CCA and DOT wood preservative treatments on one component laminated P. patula polyurethane bond performance. MSc. 2021. 103 pp. Supervisor: WESSELS CB. Co-Supervisor: TYHODA, L.

Munarini MC. A conceptual framework for environmental service payments in South African plantation forests. MSc. 2021. 91 pp. Supervisor: HAM C. Co-Supervisor: HAM H.

Pickup CD. The effects of repeated under canopy burning operations in commercial Pine plantations in Mpumalanga, South Africa on fuel loads and stand productivity. MSc. 2021. 107 pp. Supervisor: DU TOIT, B.

Prins AC. Non-destructive methods for predicting sawn lumber properties from young, standing Eucalyptus grandis and Eucalyptus grandis X urophylla trees. MSc. 2021. 96 pp. Supervisor: WESSELS CB.

Sibiya G. Predicting growth and future yield in Eucalyptus grandis x urophylla stands using the CABALA process-based model. MSc. 2021. 167 pp. Supervisor: DREW DM


Dlamini TU. The feasibility of Wood Plastic Composites as building material for RDP houses in South Africa. MSc. 2020. 119 pp. Supervisor: MEINCKEN M. Co-Supervisor: HAM C.

Gonya NAS. An investigation into shrinkage and collapse behavior of Eucalyptus grandis and Eucalyptus grandis x urophylla wood. MSc. 2020. 86 pp. Supervisor: WESSELS CB.

Mphahlele LI. Genetic control of Fusarium circinatum tolerance in Pinus patula x P. tecunumanii hybrid families. MSc. 2020. 93 pp. Supervisor: HAM H. Co-Supervisor: NEL A.

Sibiya ZB. An ergonomic risks assessment of manual and motor-manual pruning. MSc. 2020. 82 pp. Supervisor: ACKERMAN P. Co-Supervisor: ACKERMAN S.

Soludongwe SM. Co-production of furfural and wood composite products from bio-based processing residues. MSc. 2020. 77 pp. Supervisor: TYHODA L. Co-Supervisor: CHIMPANGO A. ​