Geological tools to study organic matter in soils and recent environments

1. -Malou O.P., Sebag D., Moulin P., Chevallier T., Badiane-Ndour N.Y., Thiam A., Chapuis-Lardy L.2020. The Rock-Eval signature of soil organic carbon in arenosols of the Senegalese groundnut basin. How do agricultural practices matter? Agriculture, Ecosystems & Environment 301, 107030.
   

1. -Thoumazeau A., Chevallier T., Baron V., Rakotondrazafy N., Panklang P..,Marichal R., Kibblewhite M. Sebag D., Tivet F., Bessou C., Gay F., Brauman A. 2020. A new in-field indicator to assess the impact of land management on soil carbon dynamics. Geoderma 375, 114496.
   

1. -Schomburg A., Sebag D., Turberg P., Verrecchia E.P., Guenat C., Brunner P., Adatte T., Schlaepfer R., Le Bayon R.C. 2019. Composition and superposition of alluvial deposits drive macro-biological soil engineering and organic matter dynamics in floodplains. Geoderma 355, 113899.
   

1. -Ordoñez L., Vogel H., Sebag D., Ariztegui D., Adatte T., Russell J.M., Kallmeyer J., Vuillemin A., Friese A., Crowe S.A., Bauer K.W., Simister R., Henny C., Nomosatryo S., Bijaksana S. and the Towuti Drilling Project Scientific Team. 2019. Empowering conventional Rock-Eval pyrolysis for organic matter characterization of the siderite-rich sediments of Lake Towuti (Indonesia) using End-Member Analysis. Organic Geochemistry 134, 32-44.
   

1. -Sebag D., Garcin Y., Adatte T., Deschamps P., Ménot G., Verrecchia E.P. 2018. Correction for the siderite effect on Rock-Eval parameters: Application to the sediments of Lake Barombi (southwest Cameroon). Organic Geochemistry 123, 126–135.
   

1. -Matteodo M., Grand S., Sebag D., Rowley M.C., Vittoz P., Verrecchia E.P. 2018. Decoupling of topsoil and subsoil controls on organic matter dynamics in the Swiss Alps. Geoderma 330, 41-51.
   

1. -Schomburg A., Verrecchia E.P., Guenat C., Brunner P., Sebag D., Le Bayon R.C. 2018. Rock-Eval pyrolysis discriminates soil macro-aggregates formed by plants and earthworms. Soil Biology and Biochemistry 117, 117-124.
   

1. -Sebag D., Verrecchia E.P., Cecillon L., Adatte T., Albrecht R., Aubert M., Bureau F., Cailleau G., Copard Y., Decaens T., Disnar J.R., Hetényi M., Nyilas T., Trombino L. 2016. Dynamics of soil organic matter based on new Rock-Eval indices. Geoderma 284, 185–203.
   

1. -Vindusková O., Sebag D., Cailleau G., Brus J. & Frouz J. 2015. Methodological comparison for quantitative analysis of fossil and recently derived carbon in mine soils with high content of aliphatic kerogen. Organic Geochemistry 89-90,14-22.
   

1. -Albrecht R., Sebag D. & Verrecchia E.P. 2015. Organic matter decomposition: bridging the gap between Rock-Eval pyrolysis and chemical characterization (CPMAS 13C NMR). Biogeochemistry 122, 101-111.
   

1. -Saenger A., Cécillon L., Sebag D. & Brun J-J. 2013. Soil organic carbon quantity, chemistry and thermal stability in a mountainous landscape: A Rock-Eval pyrolysis survey. Organic Geochemistry 54, 101-114.
   

1. -Debret M., Sebag D., Desmet M., Balsam W., Copard Y., Mourier B., Susperrigui A.S., Vanwelden A., Andrieux Ponel V., Arnaud F., Chapron E., Nomade J., Lalliers-Vergès E. 2011. Spectrophotometry for sedimentary dynamics : a new “Q7/4 diagramm". Earth-Science Reviews 109, 1-19.
   

1. -Sebag D., Copard Y., Di-Giovanni C., Durand A., Laignel B., Ogier S. & Lallier-Vergès E. 2006. Palynofacies as useful tool to study origins and transfers of particulate organic matter in recent terrestrial environments: synopsis and prospects. Earth-Science Reviews 79 (3/4), 241-259.
   

1. -Sebag D., Di-Giovanni C., Ogier S., Mesnage V., Laggoun-Défarge F. & Durand A. 2006. Inventory of sedimentary organic matter in modern wetland (Marais Vernier, Normandy, France) as source-indicative tools to study Holocene alluvial deposits (Lower Seine Valley, France). International Journal of Coal Geology 67 (1/2), 1-16.
   

1. -Sebag D., Disnar J.R., Guillet B., Di-Giovanni C., Verrecchia E.P. & Durand A. 2006. Monitoring OM dynamics in soils by Rock Eval pyrolysis: [...] quantification of degradation. Eur. J. Soil Sc. 57, 344-355.
   

1. -Disnar J.R., Guillet B., Kéravis D., Di-Giovanni C. & Sebag D. 2003. Soil organic matter (SOM) characterisation by Rock-Eval pyrolysis: main possibilities and limitations. Organic Geochemistry 34 (3), 327-343.
   

Anthropogenic impact on soils and water resource in modern African environments ...

1. -Branchet, P., Ariza Castro N., Fenet H., Gomez E., Courant F., Sebag D., Gardon J., Jourdan C., Ngounou Ngatcha B. Kengne I., Cadot E., Gonzalez C. 2019. Anthropic Impacts on Sub-Saharan Urban Water Resources through Their Pharmaceutical Contamination (Yaoundé, Center Region, Cameroon). Science of The Total Environment 660, 886-898.
   

1. -Branchet P., Cadot E., Fenet H., Sebag D., Ngounou Ngatcha B., Borrell Estupina V., Ndam Ngoupayou J.R., Kengne I., Braun J.J., Gonzalez C. 2018. Polar pesticide contamination of an urban and peri-urban tropical watershed affected by agricultural activities (Yaoundé, Center Region, Cameroon). Environmental Science and Pollution Research.
   

1. -Abdourhamane Touré A., Tidjani A.D., Guillon R., Rajot J-L., Petit C., Garba Z., Sebag D. 2016. Teneur en matières en suspension des lacs sahéliens en liaison avec les variations piézométrique et pluviométrique : cas des lacs Bangou Kirey et Bangou Bi, Sud-Ouest Niger. Afrique Science 12 (2), 384-392.
   

1. -Cadot E., Borrell Estupina V., Rousseau M., Sebag D. 2015. Impact environnemental de la diffusion de produits phytosanitaires par ruissellement. Deux exemples contrastés en Europe et en Afrique. Dynamiques Environnementales - Journal International des géosciences et de l’environnement, 36, 182-196.
   

1. -Mabicka Obame, R., Copard, Y., Sebag, D., Abdourhamane Touré A., Boussafir M., Bichet V., Garba Z., Guillon R.,  Petit C., Rajot J-L. & Durand A. 2014. Carbon sinks in small Sahelian lakes as an unexpected effect of land use changes since the 1960s (Saga Gorou and Dallol Bosso, SW Niger). Catena, 114, 1-10.
   

1. -Abdourhamane Touré A., Rajot J.-L., Garba Z., Guillon R., Didier T.A., Marticorena B., Petit C. & D. Sebag. 2013. Six années de suivi du flux d’érosion éolienne sur un sol sableux cultivé au Sahel : Impacts des résidus de culture et de l’encroûtement. Etude et Gestion des Sols 20 (2), 57-70.
   

1. - Leroux L., Oszwald J., Ngounou Ngatcha B., Sebag D., Penven M-J. & Servat E. 2013. Le bassin versant du Mayo Tsanaga (Nord Cameroun) : un bassin versant d’expérimentation et de compréhension des relations Homme/Milieu. Revue Française de Photogrammétrie et de Télédétection 202, 42-54.
   

1. -Abdourhamane Touré A., Rajot J-L., Garba Z., Marticorena B., Petit C. & Sebag D. 2011. Impact of very low crop residues cover on wind erosion in the Sahel. Catena 85 (3), 205-214.
   

... and other contexts

1. -Rossi A., Massei N., Laignel B., Sebag D. & Copard Y. 2009. The response of the Mississippi River to climate fluctuations and reservoir construction as indicated by wavelet analysis of streamflow and suspended-sediment loads, 1950-1975. Journal of Hydrology 377 (3/4), 237-244.
   

Soil ecology, biodiversity and ecosystem services in intertropical environments

1. -Delabye S., Rougerie R., Bayendi S., Andeime-Eyene M., Ayala D., Zakharov E.V., deWaard J.R., Hebert P.D.N., Kamgang R., Le Gall P., Lopez–Vaamonde C., Mavoungou J-F., Moussavou G., Moulin N., Oslisly R., Rahola N., Sebag D., the ECOTROP team, Decaëns T. Characterization and comparison of poorly known moth communities through DNA barcoding in two Afrotropical environments. Genome. Accepted for publication.
   

1. -Peerawat M., Blaud A., Trap J., Chevalier T., Alonso P., Gay F., Thaler P., Ayme S., Sebag D., Choosai C., Nopmanee S., Kannika S., Brauman A. 2018. Rubber plantation ageing controls soil biodiversity after land conversion from cassava. Agriculture, Ecosystems & Environment 257, 92-102.
   

2. 
   

3. -Pons S., Bindschedler S., Sebag D., Junier P., Verrecchia E.P., Cailleau G. 2018. Biocontrolled soil nutrient distribution under the influence of an oxalogenic-oxalotrophic ecosystem. Plant and Soil https://doi.org/10.1007/s11104-018-3573-1.
   

1. -Shirley M.H., Burtner B., Oslisly R., Sebag D., Testa O. 2017. Diet and body condition of cave-dwelling dwarf crocodiles (Osteolaemus tetraspis, Cope 1861) in Gabon. African Journal of Ecology 55, 411-422.
   

1. -Anthony N.M., Mickala P., Abernethy K.A., Atteke C., Bissiengou P., Bruford M.W., Dallmeier F., Decaëns T., Dudu A., Freedman A., Gonder M.K., Hardy O., Hart J., Jeffery K., Johnson M., Koumba Pambo F., Ley A., Korte L., Lahm S.A., Lee M., Lowenstein J., Mboumba J.F., Ndiade Bourobou D., Ngomanda A., Ntie S., Sebag D., Sullivan J., Vanthomme H., Vergnes V., Verheyen E., & Zimkus B. 2012. Biodiversity and conservation genetics research in central Africa: new approaches and [...]. Conservation Genetics Resources 4 (2), 523-525.
   

Climate Change in Sahelian environments ...

1. -Hassane B., Durand A., Garba Z., Dieppois B., Sebag D., Rajot J.-L., Diedhiou A., Ngounou Ngatcha B., Traoré A. 2016. Can daily meteorological measurement of near-surface wind detect climate changes in the Sahel (SE Niger, 1950-1992). Journal of Arid Environments 124, 91-101.
   

1. -Dieppois, B., Durand, A., Fournier, M., Diedhiou, A., Fontaine, B., Massei N., Nouaceur, Z., & Sebag, D. 2015. Low-frequency variability and zonal contrast in Sahel rainfall and Atlantic sea surface temperature teleconnections during the last century. Theoretical and Applied Climatology 121 (1/2), 139-155 .
   

1. -Dieppois, B., Diedhiou, A., Durand, A., Fournier, M., Massei N., Sebag, D., Xue, Y. & Fontaine, B. 2013. Quasi-decadal signals of Sahel rainfall and West African monsoon in 20th century. JGR Atmosphere 118, 12 587-12 599.
   

... and Holocene climate changes

1. -Debret M., Sebag D., Crosta X., Massei N., Petit JR., Chapron E. & Bout-Roumazeilles V. 2009. Evidence from wavelet analysis for a mid-Holocene transition in global climate forcing. QSR 28 (25/26), 2675-2688.
   

1. -Debret M., Bout-Roumazeilles V., Grousset F., Desmet M., McManus J.F., Massei N., Sebag D., Petit J.R, Copard Y., Trentesaux A. 2007. The origin of the 1500y climate cycles in Holocene N-Atlantic records. CP 3, 569-575.
   

Geoarcheology and anthropogenic impact on past African environments

1. -Garcin Y, Deschamps P., Ménot G., de Saulieu G., Schefuß E., Sebag G., et al. 2018. Reply to Giresse et al.: No evidence for climate variability during the late Holocene rainforest crisis in Western Central Africa. PNAS. https://doi.org/10.1073/ pnas.1808481115
   

1. -Garcin Y, Deschamps P., Ménot G., de Saulieu G., Schefuß E., Sebag G., et al. 2018. Reply to Clist et al.: Human activity is the most probable trigger of the Late Holocene Rainforest Crisis in Western Central Africa. PNAS. https://doi.org/10.1073/pnas.1805582115
   

1. -Garcin Y., Deschamps P., Ménot G., de Saulieu G., Schefuß E., Sebag D., Dupont L.M., Oslisly R., Brademann B., Mbusnum K.G., Onana J-M., Ako A.A., Epp L.S., Tjallingii R., Strecker M.R., Brauer A., Sachse D. 2018. Early anthropogenic impact on Western Central African rainforests 2,600 y ago, PNAS, DOI:10.1073/pnas.1715336115.
   

1. -Nfoumou Obame V., Makaya Mvoubou, Sebag D., Oslisly R., Brémond L., Mbina Mounguengui M., Giresse P. 2017. Le rôle de l’évolution des paysages holocènes dans le comblement des bas-fonds du Parc National de la Lopé (Moyenne vallée de l’Ogooué, Gabon). Bois et Forêts des Tropiques 333, 67-77.
   

1. -Sebag D., Bremond L., Jeffrey K. J., Makaya M’Voubou, Nguetsop F., Oslilsy R., Ozwald J., Saulieu G. de, 2016. Le rôle des bas-fond dans l’évolution des paysages du parc National de la Lopé, In Saulieu G. de, Elouga M., Sonké B. (éds), Pour une écologie historique en Afrique Centrale, p. 141-156.
   

1. -Oslisly R., White L., Bentaleb I., Favier C., Fontugne M., Gillet J-F. & Sebag D. 2013. Climatic and cultural changes in the west Congo Basin forests over the past 5 000 years. Phil Trans R Soc B 20120304.
   

1. -Guillon, R., Petit, C., Rajot, J-L., Abdourhamane Touré A., Bichet, V., Sebag, D. & Quiquérez, A. 2013. Stone lines and heaps on southwestern Niger plateaus as remains of ancient agricultural land. In Theory and methods in landscape archaeology, archaeogeography, 87-96.
   

1. -Guillon R., Petit C., Rajot J-L., Bichet V., Sebag D., Ide O.A. & Garba Z. 2013. Analyse de l’organisation spatiale de deux sites de production du fer dans le Sud-Ouest du Niger. ArchéoSciences 37, 123-134.
   

1. -Guillon R., Petit C., Rajot J-L., Bichet V., Ide O.A., Garba Z., Sebag D. & Abdourhamane Touré A. Analyse de la répartition spatiale des bas fourneaux d'un territoire sidérurgique au Sud-Ouest du Niger (4e-14e siècle ap. JC). BAR International Series, Cambridge Monographs in African Archaeology 81, 153-163.
   

Long-term environmental changes in central Sahel, Lake Chad and Congo Basin ...

1. -Diaz N., Dietrich F., Sebag D., King G.E., Valla P.G., Durand A., Garcin Y., de Saulieu G., Deschamps P., Herman F., Verrecchia E.P. 2018. Pedo-sedimentary constituents as proxies for paleoenvironmental reconstructions of the Late Quaternary in the Sudano-Sahelian belt. Quaternary Science Reviews 191, 348–362.
   

1. -Dietrich F., Diaz N., Deschamps P., Ngounou Ngatcha B., Sebag D., Verrecchia E.P. 2017. Origin of calcium in pedogenic carbonate nodules from silicate watersheds in the Far North Region of Cameroon: Respective contribution of in situ weathering source and dust input. Chemical Geology 460, 54-69.
   

1. -Diaz N., Dietrich F., Cailleau G., Sebag D., Ngounou Ngatcha B. & Verrecchia E. P. 2016. Can mima-like mounds be Vertisol relics (Far North Region of Cameroon, Chad Basin)? Geomorphology 261, 41-56.
   

1. -Durand A. & Sebag D. 2015. Le relief et les dynamiques morpho-climatiques : de vieilles structures guident l'action de l'eau et du vent. In: Magrin G., Lemoalle J., Pourtier R. (ed.). Atlas du lac Tchad. Passages 183, p. 44-46.
   

1. -Debret M., Bentaleb I., Sebag D., Favier C., Nguetsop V.F., Fontugne M., Oslisly R. & Ngomanda A. 2014. Continuous color and bulk organic matter analyses highlight influence of inherited paleotopography and water level rise on the sedimentary infill of Ossa Lake (S Cameroon). Palaeogeogr. Palaeoclim., Palaeoecology 411, 110-121.
   

1. -Sebag D., Durand A., Garba Z. & Verrecchia E.P. 2013. Paleohydrological reconstruction using sedimentological and mineralogical features from Late Holocene records in interdune lakes (N’Guigmi, Northern Bank of the Lake Chad, Niger). Open Journal of Geology 3 (2).
   

1. -Sebag D., Debret M., Makaya Mvoubou, Mabicka R., Ngomanda A., Oslisly R., Bentaleb I., Disnar J-R. & Giresse P. 2013. Coupled Rock-Eval pyrolysis and spectrophotometry for lacustrine sedimentary dynamics: application for West Central African rainforests (Kamalété and Nguène, Gabon). The Holocene 23, 1173-1183.
   

1. -Garba Z., Durand A., Sebag D. & Lang J. 2007. Caractérisation des marqueurs sédimentaires du ruissellement sur un massif saharien au Tardiglaciaire et à l’Holocène inférieur (Termit, Niger oriental, Bassin du lac Tchad). Africa Geoscience Review 14 (3), 337-349.                                                                                                 
   

1. -Sebag D., Durand A., Garba Z., Lang J. & Verrecchia E.P. 2006. Dynamique sédimentaire et diagenétique d’un lac holocène en milieu subaride. (N’Guigmi, Lac Tchad). Africa Geoscience Review 13 (4), 409-423.
   

1. -Sebag D., Verrecchia E.P., Lee Seong-Joo & Durand A. 2001. The natural hydrous sodium silicates from the northern bank of Lake Chad: occurrence, petrology and genesis. Sedimentary Geology 139 (1), 15-31. 
   

1. -Sebag D., Verrecchia E.P. & Durand A. 1999. Biogeochemical cycle of silica in a hyperalcalin interdunal lake during the Holocene (Lake Chad, Niger). Natürwissenschaften 86 (10), 475-478.  
   

... and other topics in African geology

1. -Soumaila A., Zibo G., Abdoulkader M. I., Halitt N., & David S. 2016. Highlighting the root of a paleoproterozoic oceanic arc in Liptako, Niger, West Africa. Journal of Geology and Mining Research 8 (2), 13-27.
   

Long-term evolution of wetlands in Lower Seine Valley

1. -Sechi S., Sebag D., Laignel B. Lepert T., Frouin M. & Durand A. 2010. The last millennia history of detrital sedimen-tation in the Lower Seine Valley (Normandy, NW France): review. Terra Nova 22 (6), 434-441.
   

1. -Frouin M., Sebag D., Durand A. & Laignel B. 2010. Palaeoenvironmental evolution of the Seine River estuary during the Holocene. Quaternaire 21 (1), 71-83.
   

1. -Frouin M., Durand A., Sebag D., Huault MF., Ogier S., Verrecchia EP. & Laignel B. 2009. Holocene evolution of a wetland in the Lower Seine Valley (Marais Vernier, France). The Holocene 19 (5), 717-727.
   

1. -Frouin M., Sebag D., Durand A., Laignel B., Saliège J.F., Mahler B.J. & Fauchard C. 2007. Influence of paleotopography, base level and sedimentation rate on estuarine system response to the Holocene sea-level rise: the example of the Marais Vernier, Seine estuary, France. Sedimentary Geology 200 (1/2), 15-29.
   

1. -Frouin M., Laignel B., Sebag D., Ogier S. & Durand A. 2007. Sedimentological characterization and origin of the deposits in a Holocene marsh (Marais Vernier, France). Zeitschrift für Geomorphologie 51 (1), 1-18.
   

1. -Frouin M., Sebag D., Laignel B., Ogier S., Verrecchia E.P. & Durand A. 2006. Tidal rhythmites of the Vernier Marsh (Seine estuary) and their implications for relative sea-level. Marine Geology 235 (1/4), 165-175.

Chantiers secondaires

Niger, Burkina Faso,

Bénin, Côte d’Ivoire

orcid.org/0000-0002-6446-6921

www.researchgate.net/profile/David_Sebag