dhr. dr. B. (Boris) Jansen
Faculteit der Natuurwetenschappen, Wiskunde en Informatica
Science Park A
Science Park 904 Amsterdam
1090 GE Amsterdam
In addition, I am currently Director of the Bachelor programme Future Planet Studies.
Of the various soil scientific disciplines, soil chemistry holds my particular interest. I am fascinated by biogeochemistry in general and in particular by understanding the fate of natural and anthropogenic compounds in terrestrial ecosystems. How does the chemistry of soils and sediments regulate the transport, transformation and preservation/degradation of compounds? How is this chemistry, and thereby the fate of compounds, altered by natural or human-induced change? What are the implications for the functioning of ecosystems, and how can we use this knowledge to optimize the ecosystem services rendered by the soil?
For my personal background and CV, more information about my research interest, or a list of my publications, please click on the appropriate tab above.
Or follow the links below to access my linked-in profile or Thomson ResearchID profile.
You can download my complete Curriculum Vitae in pdf format via the link below.
Assistant Professor at the University of Amsterdam (2008-now)
As Assistant Professor I am responsible for research and teaching (Bachelor, Master and PhD levels) in Soil Chemistry.
I provided a detailed description of my current research interest on a separate page. Please click here or select the tab 'Research interests' above.
Postdoc at the University of Amsterdam (2003-2008)
Research topic: upper forest line transitions in the Ecuadorian Andes
During my Postdoc project, I worked in the multi-disciplinary RUFLE research project of the Earth Surface Processes and Materials research group and the Paleo-Ecology and Landscape Ecology research group of IBED, together with two PhD students.
The overall aim was to study past upper forest line fluctuations in Ecuador and use the information to reconstruct the natural position of the upper forest line in the absence of human impact in the form of clear-cutting and burning. To this end, I developed a new technique to reconstruct past vegetation compositions. I showed that a combination of chain-lengts of n -alkanes and n -alcohols from the epicuticular waxes on the leaves and roots of plants can be used to distinguish plant species from one another, and developed a first database of such patterns in Ecuadorian vegetation. I was also able to prove that the straight-chain lipid patterns are preserved unaltered in peat deposits and in the volcanic ash soils of the Ecuadorian Andes for thousands of years. In close cooperation with the Computational Geo-Ecology group of IBED, I subsequently developed the advanced, new 'Vegetation Reconstruction with the Help of Inverse modeling and Biomarkers'(VERHIB) model to unravel such mixed straight-chain lipid records into the most likely combination of plant species from which they originated. Within the project we combined the results of this so-called biomarker analysis, with fossil pollen analysis. This combination of proxies greatly enhanced our abilities to reconstruct past vegetation dynamics and allowed us to reconstruct past forest compositions and past upper forestline dynamics in the Ecuadorian Andes with previously unattainable accuracy.
Ph.D. in Soil Science from the University of Amsterdam (1999-2003)
Research topic: the mobility of aluminium, iron and organic matter in acidic sandy soils.
During my Ph.D. studies, first I succesfully tested the applicability of the new experimental technique of diffusive gradients in thin films (DGT). Specifically, I investigated its ability to distinguish 'free' dissolved Al and Fe from their dissolved organic complexes. Subsequently, I used a combination of DGT and mathematical modeling (Model V and Model VI) to investigate the influence of changes in pH and metal/organic carbon ratios on the degree and type of complexation of Al and Fe with dissolved organic matter in acidic sandy soil solutions. Finally, I used a combination of the before mentioned techniques to study the role of the interactions of Al, Fe and organic matter on the formation of podzols.
Altogether, my research led to a firm establishment of the DGT technique and further vindication of Model Vand Model VI for the analysis of Al and Fe speciation in acidic soil solutions. Furthermore, my studies gave new insights into the mechanisms that regulate the mobility of Al, Fe and DOM in acidic sandy soils in general and the process of podzolization in particular.
BSc. and MSc. in Environmental Chemistry from the Vrije Universiteit Amsterdam (1993-1998)
Environmental Chemistry is a study of analytical chemisty that focusses on environmental issues such as soil- and water pollution. Within the framework of my Masters studies I investigated:
- The selective extraction of pesticides from polluted soils using subcritical water.
- The impact of endocrine disruptive pesticides on drinking-water production in the Netherlands.
- The distribution of arsenic in the deeper soil of the Dutch province of Noord-Holland.
Current research interests
In general, my current research interest lies in the study of the carbon cycle in soils from a molecular point of view, and in particular the influence of land management and environmental change on (soil) ecosystems.
The global carbon cycle
Within the plethora of soil functions, the role of soils in the global carbon cycle continues to fascinate me. Not only because of the obvious link with climate change, but also because of the relation with fertility and therefore food supply. To unravel the carbon cycle in soils we need detailed soil chemical investigations of carbon dynamics under climate and land use change, and increased occurrence of extreme meteorological events. I see great promise for a combination of molecular characterization techniques and (compound specific) C, H, N and O isotope analysis. However, such investigations need to be carried out in close collaboration with in-depth analysis and modeling of the role and response of belowground biodiversity, as well as physical processes such as erosion. Not only to get a complete picture of the processes driving the carbon cycle, but also to be able transcend from the molecular level to higher scale levels. I feel that there is much progress to be made by intensifying such connections.
Closely linked to investigating the carbon cycle is the use of the molecular and/or isotopic signature of soil organic matter as proxy, or biomarker, in environmental reconstructions. Such studies are essential to unravel the response of ecosystems to environmental change, be it anthropogenic or natural. On the other hand, studies of transformations of soil organic matter are needed to assess the stability and applicability of molecular / isotopic proxies in soils. My research within the RUFLE project showed the potential of advancement in this area by the development and use of new analytical techniques, both molecular chemical (biomarker analysis) and computational (the VERHIB model). There is great potential to further develop and apply such proxies, and great interest for such proxies from the paleo-ecological and geo-archaeological communities. An exciting expansion would be the combination with the emerging application of biological proxies such as the use of ancient DNA. Again process based understanding of molecular transformations is needed to assess the applicability.
Click the link below for a short video of exploratory fieldwork in St. Eustatius in December 2012 in search of suitable records for biomarkers together with colleagues from the Paleo-ecology research group and Geo-archaeologists from SECAR.
- populair wetenschappelijk(7)
- Mohammed, Y. B. R., Jansen, B., Parsons, J. R., de Voogt, W. P., Bagnis, S., Markus, A. A., ... Kalbitz, K. (2017). Effects of clay minerals, hydroxides, and timing of dissolved organic matter addition on the competitive sorption of copper, nickel, and zinc: a column experiment, Journal of Environmental Management, 187, 273-285. DOI: http://dx.doi.org/10.1016/j.jenvman.2016.11.056 [details]
- Engels, S., Bakker, M. A. J., Bohncke, S. J. P., Cerli, C., Hoek, W. Z., Jansen, B., ... Wolma, M. (2016). Centennial-scale lake-level lowstand at Lake Uddelermeer (The Netherlands) indicates changes in moisture source region prior to the 2.8-kyr event. Holocene, 26, 1075-1091. DOI: 10.1177/0959683616632890 [details]
- Refaey, Y., Jansen, B., El-Shater, A. H., El-Haddad, A. A., & Kalbitz, K. (2015). Clay minerals of Pliocene deposits and their potential use for the purification of polluted wastewater in the Sohag area, Egypt. Geoderma, 5, 215-225. DOI: 10.1016/j.geodrs.2015.08.002 [details] [PDF]
- Sevink, J., Verstraten, J. M., Kooijman, A. M., Loayza-Muro, R. A., Hoitinga, L., Palomino, E. J., & Jansen, B. (2015). Rare Moss-Built Microterraces in a High-Altitude, Acid Mine Drainage-Polluted Stream (Cordillera Negra, Peru). Water, Air and Soil Pollution, 226(6), . DOI: 10.1007/s11270-015-2390-x [details / files]
- Acosta, J. A., Faz, A., Kalbitz, K., Jansen, B., & Martínez-Martínez, S. (2014). Partitioning of heavy metals over different chemical fraction in street dust of Murcia (Spain) as a basis for risk assessment. Journal of Geochemical Exploration, 144, 298-305. DOI: 10.1016/j.gexplo.2014.02.004 [details]
- Jansen, B., Kalbitz, K., & McDowell, W. H. (2014). Dissolved Organic Matter: Linking Soils and Aquatic Systems. Vadose Zone Journal, 13(7), 51. DOI: 10.2136/vzj2014.05.0051 [details]
- Refaey, Y., Jansen, B., El-Shater, A. H., El-Haddad, A. A., & Kalbitz, K. (2014). The role of dissolved organic matter in adsorbing heavy metals in clay-rich soils. Vadose Zone Journal, 13(7), 9. DOI: 10.2136/vzj2014.01.0009 [details] [PDF]
- Sevink, J., Tonneijck, F., Jansen, B., & Hooghiemstra, H. (2014). Reconstrucción del límite superior del bosque en la parte norte del Ecuador: algunos resultados del proyecto RUFLE. In F. Cuesta, J. Sevink, L. D. Llambí, B. De Bièvre, & J. Posner (Eds.), Avances en investigación para la conservación de los páramos andinos. (pp. 581-601). Lima: CONDESAN. [details]
- Jansen, B., de Boer, E. J., Cleef, A. M., Hooghiemstra, H., Moscol-Olivera, M., Tonneijck, F. H., & Verstraten, J. M. (2013). Reconstruction of late Holocene forest dynamics in northern Ecuador from biomarkers and pollen in soil cores. Palaeogeography, Palaeoclimatology, Palaeoecology, 386, 607-619. DOI: 10.1016/j.palaeo.2013.06.027 [details]
- van Mourik, J. M., & Jansen, B. (2013). The added value of biomarker analysis in palaeopedology; reconstruction of the vegetation during stable periods in a polycyclic driftsand sequence in SE-Netherlands. Quaternary International, 306, 14-23. DOI: 10.1016/j.quaint.2013.05.034 [details]
- Kirkels, F. M. S. A., Jansen, B., & Kalbitz, K. (2013). Consistency of plant-specific n-alkane patterns in plaggen ecosystems: a review. Holocene, 23(9), 1355-1368. DOI: 10.1177/0959683613486943 [details]
- van Mourik, J. M., Seijmonsbergen, A. C., & Jansen, B. (2012). Geochronology of soils and landforms in cultural landscapes on aeolian sandy substrates, based on radiocarbon and optically stimulated luminescence dating (Weert, SE-Netherlands). In Danuta Michalska Nawrocka (Ed.), Radiometric Dating. (pp. 75-114). Rijeka, Croatia: In Tech. DOI: 10.5772/34662 [details]
- Acosta, J. A., Faz, A., Jansen, B., Kalbitz, K., & Martínez-Martínez, S. (2011). Assessment of salinity status in intensively cultivated soils under semiarid climate, Murcia, SE Spain. Journal of Arid Environments, 75(11), 1056-1066. DOI: 10.1016/j.jaridenv.2011.05.006 [details]
- Acosta, J. A., Faz, A., Kalbitz, K., Jansen, B., & Martínez-Martínez, S. (2011). Heavy metal concentrations in particle size fractions from street dust of Murcia (Spain) as the basis for risk assessment. Journal of Environmental Monitoring, 13, 3087-3096. DOI: 10.1039/c1em10364d [details]
- Acosta, J. A., Jansen, B., Kalbitz, K., Faz, A., & Martínez-Martínez, S. (2011). Salinity increases mobility of heavy metals in soils. Chemosphere, 85(8), 1318-1324. DOI: 10.1016/j.chemosphere.2011.07.046 [details]
- Jansen, B., Tonneijck, F. H., & Verstraten, J. M. (2011). Selective extraction methods for aluminium, iron and organic carbon from montane volcanic ash soils. Pedosphere, 21(5), 549-565. DOI: 10.1016/S1002-0160(11)60157-4 [details]
- van Geel, B., Guthrie, R. D., Altmann, J. G., Broekens, P., Bull, I. D., Gill, F. L., ... Gravendeel, B. (2011). Mycological evidence of coprophagy from the feces of an Alaskan Late Glacial mammoth. Quaternary Science Reviews, 30(17-18), 2289-2303. DOI: 10.1016/j.quascirev.2010.03.008 [details]
- Jansen, B., van Loon, E. E., Hooghiemstra, H., & Verstraten, J. M. (2010). Improved reconstruction of palaeo-environments through unravelling of preserved vegetation biomarker patterns. Palaeogeography, Palaeoclimatology, Palaeoecology, 285(1-2), 119-130. DOI: 10.1016/j.palaeo.2009.10.029 [details]
- Tonneijck, F. H., Jansen, B., Nierop, K. G. J., Verstraten, J. M., Sevink, J., & de Lange, L. (2010). Towards understanding of carbon stocks and stabilization in volcanic ash soils in natural Andean ecosystems of northern Ecuador. European Journal of Soil Science, 61(3), 392-405. DOI: 10.1111/j.1365-2389.2010.01241.x [details]
- Jansen, B., & Nierop, K. G. J. (2009). Methyl ketones in high altitude Ecuadorian Andosols confirm excellent conservation of plant-specific n-alkane patterns. Organic Geochemistry, 40(1), 61-69. DOI: 10.1016/j.orggeochem.2008.09.006 [details]
- Nierop, K. G. J., & Jansen, B. (2009). Extensive transformation of organic matter and excellent lipid preservation at the upper, superhumid Guandera páramo. Geoderma, 151(3-4), 357-369. DOI: 10.1016/j.geoderma.2009.05.002 [details]
- Jansen, B., Haussmann, N. S., Tonneijck, F. H., Verstraten, J. M., & de Voogt, P. (2008). Characteristic straight-chain lipid ratios as a quick method to assess past forest-páramo transitions in the Ecuadorian Andes. Palaeogeography, Palaeoclimatology, Palaeoecology, 262(3-4), 129-139. DOI: 10.1016/j.palaeo.2008.02.007 [details]
- Scheel, T., Jansen, B., van Wijk, A. J., Verstraten, J. M., & Kalbitz, K. (2008). Stabilization of dissolved organic matter by aluminium: A toxic effect or stabilization through precipitation? European Journal of Soil Science, 59(6), 1122-1132. DOI: 10.1111/j.1365-2389.2008.01074.x [details]
- Jansen, B., Nierop, K. G. J., Tonneijck, F. H., van der Wielen, F. W. M., & Verstraten, J. M. (2007). Can isoprenoids in leaves and roots of plants serve as biomarkers for past vegetation changes? A case study from the Equadorian Andes. Plant and Soil, 291, 181-198. DOI: 10.1007/s11104-006-9185-1 [details] [PDF]
- Nierop, K. G. J., Tonneijck, F. H., Jansen, B., & Verstraten, J. M. (2007). Organic matter in volcanic ash soils under forest and paramo along an Ecuadorian altitudinal transect. Soil Science Society of America Journal, 71(4), 1119-1127. DOI: 10.2136/sssaj2006.0322 [details]
- Jansen, B., Nierop, K. G. J., Kotte, M. C., de Voogt, P., & Verstraten, J. M. (2006). The applicability of Accelerated Solvent Extraction (ASE) to extract lipid biomarkers from soils. Applied Geochemistry, 21(6), 1006-1015. DOI: 10.1016/j.apgeochem.2006.02.021 [details]
- Jansen, B., Nierop, K. G. J., Hageman, J. A., Cleef, A. M., & Verstraten, J. M. (2006). The straight-chain lipid biomarker composition of plant species responsible for the dominant biomass production along two altitudinal transects in the Ecuadorian Andes. Organic Geochemistry, 37(10), 1514-1526. DOI: 10.1016/j.orggeochem.2006.06.018 [details]
- Kraal, P., Jansen, B., Nierop, K. G. J., & Verstraten, J. M. (2006). Copper complexation by tannic acid in aqueous solution. Chemosphere, 65(11), 2193-2198. DOI: 10.1016/j.chemosphere.2006.05.058 [details]
- Nierop, K. G. J., Jansen, B., Hageman, J. A., & Verstraten, J. M. (2006). The complementarity of extractable and ester-bound lipids in a soil profile under pine. Plant and Soil, 286(1-2), 269-285. DOI: 10.1007/s11104-006-9043-1 [details]
- Tonneijck, F. H., van der Plicht, J., Jansen, B., Verstraten, J. M., & Hooghiemstra, H. (2006). Radiocarbon dating of soil organic matter fractions in Andosols in Northern Ecuador. Radiocarbon, 48(3), 337-353. [details]
- Jansen, B., Mulder, J., & Verstraten, J. M. (2005). Modeling aluminium solubility in intrazonal podzols using WHAM-S/Model V. Journal of Plant Nutrition and Soil Science, 168, 325-333. DOI: 10.1002/jpln.200421671 [details]
- Jansen, B., Nierop, K. G. J., & Verstraten, J. M. (2005). Mechanisms controlling the mobility of dissolved organic matter, aluminium and iron in podzol B horizons. European Journal of Soil Science, 56, 537-550. DOI: 10.1111/j.1365-2389.2004.00686.x [details]
- Jansen, B., Nierop, K. G. J., & Verstraten, J. M. (2004). Mobilization of dissolved organic matter, aluminium and iron in podzol eluvial horizons as affected by formation of metal-organic complexes and interactions with solid soil material. European Journal of Soil Science, 55, 287-297. DOI: 10.1111/j.1365-2389.2004.00598.x [details]
- Jansen, B., Nierop, K. G. J., Vrugt, J. A., & Verstraten, J. M. (2004). (Un)certainty of overall binding constants of Al with dissolved organic matter determined by the Scatchard approach. Water Research, 38, 1270-1280. DOI: 10.1016/j.watres.2003.11.017 [details]
- Jansen, B., Mulder, A., & Verstraten, J. M. (2003). Organic complexion of Al and Fe in acidic soil solutions comparison of diffusive gradients in thin films analyses with Models V and VI. Analytica Chimica Acta, 498, 105-117. DOI: 10.1016/j.aca.2003.08.054 [details]
- Jansen, B., Nierop, K. G. J., & Verstraten, J. M. (2003). Mobility of Fe(II), Fe(III) and Al in acidic forest soils mediated by dissolved organic matter: influence of solution pH and metal/organic carbon ratios. Geoderma, 113, 323-340. DOI: 10.1016/S0016-7061(02)00368-3 [details]
- Jansen, B., Nierop, K. G. J., & Verstraten, J. M. (2002). Influence of pH and metal/carbon ratios on soluble organic complexation of Fe(II), Fe(III) and Al(III) in soil solutions determined by diffusive gradients in thin films. Analytica Chimica Acta, 454, 259-270. DOI: 10.1016/S0003-2670(01)01551-3 [details]
- Nierop, K. G. J., Jansen, B., & Verstraten, J. M. (2002). Dissolved organic matter, aluminium and iron interactions: precipitation induced by metal/carbon ratio, pH and competition. Science of the Total Environment, 300(1-3), 199-209. [details]
- Nierop, K. G. J., Jansen, B., Vrugt, J. A., & Verstraten, J. M. (2002). Copper complexation by dissolved organic matter and uncertainty assessment of their stability constants. Chemosphere, 49(10), 1191-1200. DOI: 10.1016/S0045-6535(02)00504-0 [details]
- Kubátová, A., Jansen, B., Vaudoisot, J. F., & Hawthorne, S. B. (2002). Thermodynamic and kinetic models for the extraction of essential oil from savory and polycyclic aromatic hydrocarbons from soil with hot (subcritical) water and supercritical CO2. Journal of Chromatography A, 975, 175-188. DOI: 10.1016/S0021-9673(02)01329-8 [details]
- Jansen, B., Kotte, M. C., van Wijk, A. J., & Verstraten, J. M. (2001). Comparison of diffusive gradients in thin films and equilibrium dialysis for the determination of Al, Fe(III) and Zn complexed with dissolved organic matter. Science of the Total Environment, 277(1-3), 45-55. DOI: 10.1016/S0048-9697(01)00911-1 [details]
- Jansen, B., Cleef, A. M., Moscol Olivera, M. C., Hooghiemstra, H., Tonneijck, F. H., Sevink, J., & Verstraten, J. M. (2011). Informe final de investigación del programa Reconstructión del Límite Superior del Bosque en Ecuador (RUFLE). In S. G. Maldonado, & B. De Bievre (Eds.), PARAMUNDI, 2do Congreso Mundial de Páramos. Memorias. (pp. 74-91). Quito: CONDESAN, Ministerio del Ambiente del Ecuador. [details]
- van Mourik, J. M., & Jansen, B. (2016). enkdekken ontleed met biomarkers. Geografie, oktob2016, 34-37. [details]
- Jansen, B., Cleef, A., Moscol Olivera, M., Hooghiemstra, H., Tonneijck, F., Sevink, J., & Verstraten, J. (2009). Informe final de investigación del programa Reconstrucción del Límite Superior del Bosque en Ecuador (RUFLE). Amsterdam: Instituut v. Biodiversiteit en Ecosysteem Dynamica. [details] [PDF]
- Jansen, B., Hooghiemstra, H., Verstraten, J. M., Moscol, M., Tonneijck, F. H., & Cleef, A. M. (2006). Reforestation in the frame of the Kyoto Protocol: up to which elevation? WOTRO News, 2006(7 (JUL06)), 16-16. [details]
- Jansen, B. (2003). Review of : Cation binding by humic substances [Review of: E. Tipping (2003) Cation binding by humic substances]. Geoderma, 114, 141-142. [details]
- Hooghiemstra, H., & Jansen, B. (2013). Waar lag de bosgrens? Geobrief. [details]
- Hooghiemstra, H., Bakker, J., & Jansen, B. (2010). CO2 vastleggen door bosaanplant in de hoge Andes - Middel erger dan de kwaal. Geografie, 19, 16-19. [details]
- Jansen, B., & Reijnders, L. (2009). Biobrandstoffen: het ei van Columbus? Kennislink [online]. [details]
- Jansen, B. (2003). The mobility of aluminium, iron and organic matter in acidic Amsterdam: IBED, Universiteit van Amsterdam [details / files]
- Jansen, B. (member) (2013): Soil System Sciences Division of the European Geosciences Union (External organisation).
- Jansen, B. (member) (2013): Stichting de Nationale DenkTank (External organisation).
- Jansen, B. (member) (2011-2012): European Confederation of Soil Science Societies (External organisation).
- Jansen, B. (member) (2010-2012): European Geosciences Union (EGU) (External organisation).
- Jansen, B. (member) (2007-2010): Nederlandse Bodemkundige Vereniging (NBV) (External organisation).
- Jansen, B. (member) (2007-2010): Platform Beta & Techniek (External organisation).
Stichting de Nationale Denktank