Dr. Tim Jennerjahn

Arbeitsgruppenleiter

Department: Biogeochemistry and Geology
Working Group: WG Ecological Biogeochemistry

Phone: +49 421 23800 - 44

Fax: +49 421 23800 - 30

Email: This email address is being protected from spambots. You need JavaScript enabled to view it.

Room: 1103 (1st floor)

Research interests

- Carbon and nutrient cycling
- Rivers
- Mangroves
- Continental margins
- Tropical coastal ecosystems
- Biogeochemistry
- Isotope geochemistry
- Reconstruction of carbon and nutrient cycling and climate in the geological past
- Organic matter diagenesis


Publications

Peer-reviewed journals

Jennerjahn, T.C., E. Gilman, K.W. Krauss, L.D. Lacerda, I. Nordhaus, E. Wolanski (2017). Chapter 7: Mangrove ecosystems under climate change. In 'Mangrove Ecosystems: A Global Biogeographic Perspective Structure, Function and Services' (eds. V. Rivera-Monroy, S.Y. Lee, E. Kristensen, R.R. Twilley). Springer Publishing Company, New York, in press.

Hapsari, K.A., S. Biagioni, T.C. Jennerjahn, P. Meyer Reimer, A. Saad, Y. Achnopha, S. Sabiham, H. Behling (2017). Environmental dynamics and carbon accumulation rate of a tropical peatland in Central Sumatra, Indonesia. Quaternary Science Reviews 169: 173-187. doi:10.1016/j.quascirev.2017.05.026

Nordhaus, I., T. Salewski, T.C. Jennerjahn (2017). Interspecific variations in mangrove leaf litter decomposition are related to labile nitrogenous compounds. Estuarine, Coastal and Shelf Science 192: 137-148. doi:10.1016/jecss.2017.04.029

Poliakova, A., K.A.F. Zonneveld, L. Herbeck, T.C. Jennerjahn, Haryadi Permana, C. Kwiatkowski, H. Behling (2017). High resolution multi-proxy reconstruction of environmental changes in coastal waters of the Java Sea, Indonesia, during the late Holocene. Palynology, 41: 297-310. doi:10.1080/01916122.2016.1162865

Contreras-Rosales, L.A., E. Schefuß, V. Meyer, L. Palamenghi, A. Lückge, T.C. Jennerjahn (2016). Origin and fate of sedimentary organic matter in the northern Bay of Bengal during the last 18 ka. Global and Planetary Change 146: 53-66. doi:10.1016/j.gloplacha.2016.09.008

Kumaran, N.K.P., D. Padmalal, R.B. Limaye, S. Vishnu Mohan, T. Jennerjahn, P.G. Gamre (2016). Tropical peat and peatland development in the floodplains of the Greater Pamba Basin, South-western India during the Holocene. PLOS ONE, doi:10.1371/journal.pone.0154297

Mitchell, S.B., T.C. Jennerjahn, S. Vizzini & W. Zhang (2015). Changes to processes in estuaries and coastal waters due to intense multiple pressures – an introduction and synthesis. In Changes to processes in estuaries and coastal waters due to intense multiple pressures, (eds. S.B. MITCHELL, T.C. JENNERJAHN, S. VIZZINI & W. ZHANG), special issue, Estuarine Coastal and Shelf Science 156: 1-6. doi:10.1016/j.ecss.2014.12.027

Contreras-Rosales, L.A., T. Jennerjahn, T. Tharammal, V. Meyer, A. Paul, A. Lückge & E. Schefuß (2014). Evolution of the Indian Summer Monsoon and terrestrial vegetation in the Bengal region during the past 18 ka. Quaternary Science Reviews 102: 133-148.

Poliakova, A., T. Rixen, T. Jennerjahn & H. Behling (2014). Eleven Month High Resolution Pollen and Spore Sedimentation Record off SW Java in the Indian Ocean. Marine Micropaleontology 111: 90-99. doi:10.1016/j.marmicro.2014.06.006

Herbeck, L.S., M. Sollich, D. Unger, M. Holmer & T.C. Jennerjahn (2014). Impact of pond aquaculture effluents on seagrass performance in NE Hainan, tropical China. Marine Pollution Bulletin 85: 190-203. DOI:10.1016/j.marpolbul.2014.05.050

Jennerjahn, T.C. & S.B. Mitchell (2013). Pressures, stresses, shocks and trends in estuarine ecosystems – an introduction and synthesis. In Pressure, stresses, shocks and trends in estuarine ecosystems, (eds. T.C. Jennerjahn & S. Mitchell), special issue, Estuarine Coastal and Shelf Science130: 1-8. doi.org/10.1016/j.ecss.2013.07.008.

Jennerjahn, T.C., I. Jänen, C. Propp, Seno Adi & Sutopo Purwo Nugroho (2013). Environmental impact of mud volcano inputs on the anthropogenically altered Porong River and Madura Strait coastal waters, Java, Indonesia. In Pressure, stresses, shocks and trends in estuarine ecosystems, (eds. T.C. Jennerjahn & S. Mitchell), special issue, Estuarine Coastal and Shelf Science 130: 152-160. doi.org/10.1016/j.ecss.2013.04.007

Santos, E.S., T. Jennerjahn, T. Leipe, P.R.P. Medeiros, W.F.L. Souza, B.A. Knoppers (2013). Origin of organic matter in the sediments of the estuarine-delta São Francisco River (in Portuguese). Geochimica Brasiliensis 27: 37-48.

Jennerjahn, T.C., Seno Adi & F. Schroeder (2013). Editorial – Human activities and natural disasters affecting water quality and ecology of the Brantas River and Madura Strait coastal waters, Java, Indonesia. In Environmental change affecting the Brantas River and Madura Strait coastal zone, Java, Indonesia, (eds. T.C. Jennerjahn, Seno Adi & F. Schroeder), special issue, Asian Journal of Water, Environment and Pollution 10: 1-3.

Adi, S., I. Jänen & T.C. Jennerjahn (2013). History of development and attendant environmental changes in the Brantas River basin, Java, Indonesia, since 1970. In Environmental change affecting the Brantas River and Madura Strait coastal zone, Java, Indonesia, (eds. T.C. Jennerjahn, Seno Adi & F. Schroeder), special issue, Asian Journal of Water, Environment and Pollution 10: 5-15.

Jennerjahn, T.C. & S. Klöpper (2013). Does high silicate supply control phytoplankton and particulate organic matter composition in two eutrophied reservoirs in the Brantas River catchment, Java, Indonesia? In Environmental change affecting the Brantas River and Madura Strait coastal zone, Java, Indonesia, (eds. T.C. Jennerjahn, Seno Adi & F. Schroeder), special issue, Asian Journal of Water, Environment and Pollution 10: 41-53.

Jänen, I., Seno Adi & T.C. Jennerjahn (2013). Spatio-temporal variations in nutrient supply of the Brantas River to Madura Strait coastal waters, Java, Indonesia, related to human alterations in the catchment and a mud volcano. In Environmental change affecting the Brantas River and Madura Strait coastal zone, Java, Indonesia, (eds. T.C. Jennerjahn, Seno Adi & F. Schroeder), special issue, Asian Journal of Water, Environment and Pollution 10: 73-93.

Propp, C., I. Jänen & T. Jennerjahn (2013). Sources and degradation of sedimentary organic matter in coastal waters off the Brantas River estuary, Java, Indonesia. In Environmental change affecting the Brantas River and Madura Strait coastal zone, Java, Indonesia, (eds. T.C. Jennerjahn, Seno Adi & F. Schroeder), special issue, Asian Journal of Water, Environment and Pollution 10: 95-115.

Zhang, J., D.R. Wang, T. Jennerjahn & L. Dsikowitzky (2013). Land-Sea Interactions at the East Coast of Hainan Island, South China Sea: A Synthesis. In Land – Sea Interactions in Tropical Ecosystems of Hainan, China, (eds. T.C. Jennerjahn, J. Zhang, D.R. Wang & L. Dsikowitzky), special issue, Continental Shelf Research, in press. doi.org/10.1016/j.csr.2013.01.004.

Jennerjahn, T.C., L. Dsikowitzky, J. Zhang & D.R. Wang (2012). Editorial - Land–Sea Interactions in Tropical Ecosystems of Hainan, China. In Land – Sea Interactions in Tropical Ecosystems of Hainan, China, (eds. T.C. Jennerjahn, J. Zhang, D.R. Wang & L. Dsikowitzky), special issue, Continental Shelf Research, in press. doi.org/10.1016/j.csr.2012.11.013.

Wu, Y., H. Bao, D. Unger, L.S. Herbeck, Z. Zhu, J. Zhang & T.C. Jennerjahn (2012). Biogeochemical behavior of organic carbon in a small tropical river and estuary, Hainan, China. In Land – Sea Interactions in Tropical Ecosystems of Hainan, China, (eds. T.C. Jennerjahn, J. Zhang, D.R. Wang & L. Dsikowitzky), special issue, Continental Shelf Research, in press. doi.org/10.1016/j.csr.2012.07.017

Herbeck, L.S., D. Unger, Y. Wu & T.C. Jennerjahn (2012). Effluent, nutrient and organic matter export from shrimp and fish ponds causing eutrophication in coastal and back-reef waters of NE Hainan, tropical China. In Land – Sea Interactions in Tropical Ecosystems of Hainan, China, (eds. T.C. Jennerjahn, J. Zhang, D.R. Wang & L. Dsikowitzky), special issue, Continental Shelf Research, in press. doi:10.1016/j.csr.2012.05.006

Jennerjahn, T.C. (2012). Biogeochemical response of tropical coastal systems to present and past environmental change. Earth Science Reviews 114: 19-41. doi.org/10.1016/j.earscirev.2012.04.005.

Unger, D., L. Herbeck, M. Li, H. Bao, Y. Wu, J. Zhang & T. Jennerjahn (2012). Sources, transformation and fate of particulate amino acids and hexosamines under varying hydrological regimes in the tropical Wenchang/Wenjiao Rivers and estuary, Hainan, China. In Land – Sea Interactions in Tropical Ecosystems of Hainan, China, (eds. T.C. Jennerjahn, J. Zhang, D.R. Wang & L. Dsikowitzky), special issue, Continental Shelf Research, doi:10.1016/j.csr.2012.02.014.

Herbeck, L.S., D. Unger, U. Krumme, S.M. Liu & T. Jennerjahn (2011). Typhoon-induced precipitation impact on nutrient and suspended matter dynamics of a tropical estuary affected by human activities in Hainan, China. Estuarine Coastal and Shelf Science 93: 375-388.

Nordhaus, I., T. Salewski & T.C. Jennerjahn (2011). Food preferences of mangrove crabs related to leaf nitrogen compounds in the Segara Anakan Lagoon, Java, Indonesia. Journal of Sea Research 65: 414-426.

Dsikowitzky, L., I. Nordhaus, T. Jennerjahn, P. Khrycheva, Y. Sivatharshan, E. Yuwono & J. Schwarzbauer (2011). Anthropogenic organic contaminants in water, sediments and benthic organisms of the mangrove-fringed Segara Anakan Lagoon, Java, Indonesia. Marine Pollution Bulletin 62: 851-862.

Baumgart, A., T. Jennerjahn, M. Mohtadi & D. Hebbeln (2010). Distribution and burial of organic carbon in sediments from the Indian Ocean upwelling region off Java and Sumatra, Indonesia. Deep-Sea Res. 57: 458-467.

Dupont, L.M., F. Schlütz, C.T. Ewah, T.C. Jennerjahn, A. Paul & H. Behling (2010). Two-step vegetation response to enhanced precipitation in Northeast Brazil during Heinrich Event 1. Tropical Paleoecology & Climate Change, (eds. S. Haberle, H. Behling, L. Dupont & W. Kirleis), special issue, Global Change Biology 16: 1647-1660.

Jennerjahn, T.C., B. Knoppers, W.F.L. de Souza, C.E.V. Carvalho, G. Mollenhauer, M. Hübner & V. Ittekkot (2010). Factors controlling the production and accumulation of organic matter along the Brazilian continental margin between the equator and 22°S.- In Carbon and Nutrient Fluxes in Continental Margins: A Global Synthesis, (eds. K.K. Liu, R. Quinones, L. Talaue-Mcmanus & L. Atkinson). CMTT/IGBP, Springer Publishing Company, New York, 427-442.

Holtermann, P., H. Burchard & T.C. Jennerjahn (2009). Hydrodynamics of the Segara Anakan Lagoon. In Segara Anakan, Java, Indonesia, a mangrove-fringed coastal lagoon affected by human activities, (eds. T.C. Jennerjahn & Edy Yuwono), special issue, Regional Environmental Change 9: 245-258. DOI 10.1007/s10113-008-0075-3.

Jennerjahn, T.C. & Edy Yuwono (2009). Editorial. In Segara Anakan, Java, Indonesia, a mangrove-fringed coastal lagoon affected by human activities, (eds. T.C. Jennerjahn & Edy Yuwono), special issue, Regional Environmental Change 9: 231-233. DOI 10.1007/s10113-009-0089-5.

Jennerjahn, T.C., B. Nasir & I. Pohlenga (2009). Spatio-temporal variation of dissolved inorganic nutrients in the Segara Anakan Lagoon, Java, Indonesia. In Segara Anakan, Java, Indonesia, a mangrove-fringed coastal lagoon affected by human activities, (eds. T.C. Jennerjahn & Edy Yuwono), special issue, Regional Environmental Change 9: 259-274. DOI 10.1007/s10113-008-0077-1.

Gomani, M.C., T. Jennerjahn & E. Kaunda (2009). Biogeochemistry of mid-sized tropical river, Linthipe, Malawi. Effects of human activities on biogeochemistry of Linthipe River, southern Lake Malawi basin. VDM Verlag Dr. Müller, Saarbrücken, 92 pp.

Jennerjahn, T.C., K. Soman, V. Ittekkot, I. Nordhaus, S. Sooraj, Priya R.S. & N. Lahajnar (2008). Effect of land use on the biogeochemistry of dissolved nutrients and suspended and sedimentary organic matter in the tropical Kallada River and Ashtamudi estuary, Kerala, India. Biogeochemistry 90: 29-47.

Muller, J., M. Kylander, R.A.J. Wüst, D. Weiss, A. Martinez-Cortizas, A.N. LeGrande, T. Jennerjahn, H. Behling, W.T. Anderson & G. Jacobson (2008). Possible evidence for wet Heinrich phases in tropical NE Australia: The Lynch’s Crater deposit. Quaternary Science Reviews 27: 468-475.

Alkhatib, M., T.C. Jennerjahn & Joko Samiaji (2007). Biogeochemistry of the Dumai River estuary, Sumatra, Indonesia, a tropical blackwater river. Limnol. Oceanogr. 52: 2410-2417.

Mohtadi, M., L. Max, D. Hebbeln, A. Baumgart, N. Krück & T. Jennerjahn (2007) Modern environmental conditions recorded in surface sediment samples off W and SW Indonesia: Planktonic foraminifera and biogenic compounds analyses. Mar. Micropaleontol. 65: 96-112.

Zhang, J., Y. Wu, T.C. Jennerjahn, V. Ittekkot & Q. He (2007) Distribution of organic matter in the Changjiang (Yangtze River) Estuary and their stable carbon and nitrogen isotopic rations: Implications for source discrimination and sedimentary dynamics. Mar. Chem. 106: 111-126.

Edy Yuwono, T.C. Jennerjahn, I. Nordhaus, Erwin Ardli Riyanto, M. Husein Sastranegara, Rudhi Pribadi (2007) Ecological status of Segara Anakan, Java, Indonesia, a mangrove-fringed lagoon affected by human activities. Asian Journal of Water, Environment and Pollution 4: 61-70.

Silva, E.I.L., T.C. Jennerjahn & V. Ittekkot (2005). Nutrient fluxes into coastal waters via Sri Lankan rivers: a comparison with other Asian rivers.- International Journal of Ecology and Environmental Sciences 31: 213-221.

Jennerjahn, T.C., V. Ittekkot, H.W. Arz, H. Behling, J. Pätzold & G. Wefer (2004). Asynchronous terrestrial and marine signals of climate change during Heinrich events.- Science 306: 2236-2239.

Jennerjahn, T.C.,V. Ittekkot, S. Klöpper, Seno Adi, Sutopo Purwo Nugroho, Nana Sudiana, Anyuta Yusmal, Prihartanto & B. Gaye-Haake (2004). Biogeochemistry of a tropical river affected by human activities in its catchment: Brantas River estuary and coastal waters of Madura Strait, Java, Indonesia.- Estuar. Coast. Shelf Sci., 60: 503-514.

Koppelmann, R., H. Weikert, C. Halsband-Lenk & T. Jennerjahn (2004). Mesozooplankton community respiration and its relation to particle flux in the oligotrophic Eastern Mediterranean.- Glob. Biogeochem. Cycles 18, GB 1039, doi:10.1029/2003GB002121.

Mollenhauer, G., R.R. Schneider, T. Jennerjahn, P.J. Müller & G. Wefer (2004). Organic carbon accumulation in the South Atlantic Ocean: its modern, mid-Holocene and last glacial distribution.- Glob. Planet. Change 40: 249-266.

Jennerjahn, T.C. & V. Ittekkot (2002). Relevance of mangroves for the production and deposition of organic matter along tropical continental margins.- Naturwissenschaften 89: 23-30.

Suthhof, A., T.C. Jennerjahn, P. Schäfer & V. Ittekkot (2000). Nature of organic matter in surface sediments from the Pakistan continental margin and the deep Arabian Sea: Amino acids.- Deep-Sea Res. II 47 (1-2): 329-351.

Ovalle, A.R.C., C.E. Rezende, C.E.V. Carvalho, T.C. Jennerjahn & V. Ittekkot (1999). Biogeochemical characteristics of coastal waters adjacent to small river-mangrove systems, East Brazil.- In Sedimentation process at the East and Northeast Brazil Shelf, (eds. B. Knoppers & W. Ekau), Geo-Mar. Lett. 19 (3): 179-185

Jennerjahn, T.C., V. Ittekkot, C.E.V. Carvalho, A.R.C. Ovalle, C.E. Rezende & H. Erlenkeuser (1999). Temporal variability of amino acid, hexosamine and carbohydrate fluxes on the eastern Brazilian continental margin related to discharge of the São Francisco River, Brazil.- In Sedimentation process at the East and Northeast Brazil Shelf, (eds. B. Knoppers & W. Ekau), Geo-Mar. Lett. 19 (3): 202-208.

Jennerjahn, T.C., V. Ittekkot, C.E.V. Carvalho, A.R.C. Ovalle, C.E. Rezende & H. Erlenkeuser (1999). Temporal variability of amino acid, hexosamine and carbohydrate fluxes on the eastern Brazilian continental margin related to discharge of the São Francisco River, Brazil.- In Sedimentation process at the East and Northeast Brazil Shelf, (eds. B. Knoppers & W. Ekau), Geo-Mar. Lett. 19 (3): 202-208.

Chen, J., L. Xu, L. Zheng, H.-K. Wong & T. Jennerjahn (1998). Organic geochemical characteristics of time-series settling particles in northern South China Sea and their implications.- Chin. J. Geochem. 17: 275-283.

Jennerjahn, T.C. & V. Ittekkot (1997). Organic matter in sediments in the mangrove areas and adjacent continental margins of Brazil: I. Amino acids and hexosamines.- Oceanologica Acta, Vol. 20, No. 2: 359-369.

Von Rad, U., H. Schulz & SONNE 90 Scientific Party* (1995). Sampling the oxygen minimum zone off Pakistan: glacial-interglacial variations of anoxia and productivity (preliminary results, SONNE 90 cruise).- Mar. Geol. 125: 7-19.
* A. Ali Khan, M. Ansari, U. Berner, P. Cepek, G. Cowie, P. Dietrich, H. Erlenkeuser, M. Geyh, T. Jennerjahn, A. Lückge, V. Marchig, V. Riech, H. Rösch, P. Schäfer, S. Schulte, F. Sirocko, M. Tahir & W. Weiss.

Proceedings

Jennerjahn, T.C., R. Moll, G. Sebhatu, M.H. Sastranegara, E. Ardli, I. Nordhaus (2013). Sources and fate of mangrove organic matter in a human-impacted estuarine lagoon in Indonesia. (Lecture) ECSA53 Conference 'Estuaries and coastal areas in times of intense change', Shanghai, China, October 2013.

Jennerjahn, T.C., J. Zhang, D.R. Wang, L. Dsikowitzky, Y. Wu, S.M. Liu, U. Krumme, C. Roder, L. Herbeck, D. Unger (2013). Land-based human activities affecting coastal ecosystems of tropical China, Hainan – Scientific results and management recommendations of the LANCET project. (Poster) ECSA53 Conference 'Estuaries and coastal areas in times of intense change', Shanghai, China, October 2013.

Jennerjahn, T.C., I. Jänen, A.E. Ponnurangam, C. Propp & Seno Adi (2012). Human activities and extreme events increasing dissolved nutrient and particulate organic matter loads in the Brantas River, Java, Indonesia. (Lecture) ECSA50 Conference 'Today's Science for Tomorrow's Management', Venice, Italy, June 2012.

Unger, D., D. Kaiser, S.M. Liu, L.S. Herbeck, T.C. Jennerjahn & H. Zhou (2012). Impact of Anthropogenic Activities on Nitrogen Transformation and Export in Two Contrasting River-Estuarine Systems in the Guangxi and Hainan Provinces, South China. (Poster) ECSA50 Conference 'Today's Science for Tomorrow's Management', Venice, Italy, June 2012.

Herbeck, L.S., D. Unger & T.C. Jennerjahn (2012). Eutrophication of seagrass-covered backreef areas caused by pond aquaculture in tropical China: Evidence from stable nitrogen isotopes. (Lecture) ECSA50 Conference 'Today's Science for Tomorrow's Management', Venice, Italy, June 2012.

Dsikowitzky, L., I. Nordhaus, P. Khrycheva, Y. Sivatharshan, Edy Yuwono, T.C. Jennerjahn & J. Schwarzbauer (2011). Anthropogenic organic contaminants in water, sediments and benthic organisms in the mangrove-fringed Segara Anakan Lagoon, Java, Indonesia. SETAC Europe, 21st Annual Meeting, Milano, Italy, May 2011. Abstract book page: 227.

Arianto Budi Santoso & T.C. Jennerjahn (2009). Temporal variation of dissolved and particulate organic carbon and dissolved inorganic nutrients in the Segara Anakan Lagoon, Java, Indonesia. (Poster) World Ocean Conference, Symposium of Indonesia – Germany SPICE program, Manado.

Herrmann, R. & T. Jennerjahn (2009). Spatial variation in the carbon and nutrient biogeo-chemistry in the Segara Anakan Lagoon, Java, Indonesia. (Poster) World Ocean Conference, Symposium of Indonesia – Germany SPICE program, Manado.

Jänen, I., T. Jennerjahn, Seno Adi & Didik Agus Wijanarko (2009). Anthropogenic nutrient loading of the Brantas river affecting coastal water quality of the Madura Strait, Java, Indonesia. (Poster) World Ocean Conference, Symposium of Indonesia – Germany SPICE program, Manado.

Jänen, I., C. Propp, T. Jennerjahn, Seno Adi (2009). Impact of the Sidoarjo mud volcano on the biogeochemistry of suspended particulate matter of the Brantas river estuary Java, Indonesia. (Poster) 24th International Meeting on Organic Geochemistry (IMOG), European Association of Organic Geochemists (EAOG), Bremen.

Jennerjahn, T., S. Henkel, K. Soman, D. Padmalal, L. Krupp, D. Unger, V. Ittekkot, I. Schulz, N. T. An, Seno Adi, Y. Wu & J. Zhang (2009). Anthropogenically altered landscapes affecting the biogeochemistry of river suspensions from tropical S and SE Asia. (Poster) 24th International Meeting on Organic Geochemistry (IMOG), European Association of Organic Geochemists (EAOG), Bremen.

Unger, D., L. Krupp, S.M. Liu, Y. Wu & T. Jennerjahn (2009). Human activities affecting composition and fluxes of nutrients and organic matter in two tropical river-estuarine systems in Hainan, China. (Poster) Annual Meeting American Society for Limnology and Oceanography, Nice.

Spörl, G. & T. Jennerjahn (2009). Stable nitrogen and carbon isotope composition of suspended matter and sediments in a coastal lagoon affected by sugar cane monoculture in NE Brazil. (Poster) Annual Meeting American Society for Limnology and Oceanography, Nice.

Propp, C., T. Jennerjahn, I. Jänen & Didik Agus Wijanarko (2009). Benthic nutrient fluxes in the tropical Brantas River estuary and Madura Strait coastal waters (Java, Indonesia). (Poster) Annual Meeting American Society for Limnology and Oceanography, Nice.

Propp, C., T. Jennerjahn & Didik Agus Wijanarko (2009). Ammonium and oxygen fluxes across the sediment-water interface in tropical Brantas river estuary and adjacent coastal waters (Java, Indonesia). (Poster) World Ocean Conference, Symposium of Indonesia – Germany SPICE program, Manado.

Krupp, L.S., D. Unger, D. Wang & T. Jennerjahn (2009). Impact of shrimp pond effluents on seagrass beds in tropical Hainan, China. (Poster) Annual Meeting American Society for Limnology and Oceanography, Nice.

Krupp, L., D. Unger, U. Krumme, S. Liu, T. Jennerjahn (2009). Typhoon induced changes in the biogeochemistry of a tropical estuary in Hainan, China. (Poster) 24th International Meeting on Organic Geochemistry (IMOG), European Association of Organic Geochemists (EAOG), Bremen.

Jennerjahn, T., S. Henkel, K. Soman, D. Padmalal, L. Krupp, D. Unger, V. Ittekkot, I. Schulz, N. T. An, Seno Adi, Y. Wu & J. Zhang (2009). Anthropogenically altered landscapes affecting the biogeochemistry of river suspensions from tropical S and SE Asia. (Poster) 24th International Meeting on Organic Geochemistry (IMOG), European Association of Organic Geochemists (EAOG), Bremen.

Jänen, I., C. Propp, T. Jennerjahn, Seno Adi (2009). Impact of the Sidoarjo mud volcano on the biogeochemistry of suspended particulate matter of the Brantas river estuary Java, Indonesia. (Poster) 24th International Meeting on Organic Geochemistry (IMOG), European Association of Organic Geochemists (EAOG), Bremen.

Jänen, I., T. Jennerjahn, Seno Adi & Didik Agus Wijanarko (2009). Anthropogenic nutrient loading of the Brantas river affecting coastal water quality of the Madura Strait, Java, Indonesia. (Poster) World Ocean Conference, Symposium of Indonesia – Germany SPICE program, Manado.

Herrmann, R. & T. Jennerjahn (2009). Spatial variation in the carbon and nutrient biogeo¬chemistry in the Segara Anakan Lagoon, Java, Indonesia. (Poster) World Ocean Conference, Symposium of Indonesia – Germany SPICE program, Manado.

Arianto Budi Santoso & T.C. Jennerjahn (2009). Temporal variation of dissolved and particulate organic carbon and dissolved inorganic nutrients in the Segara Anakan Lagoon, Java, Indonesia. (Poster) World Ocean Conference, Symposium of Indonesia – Germany SPICE program, Manado.

Jennerjahn, T.C. & V. Ittekkot (2008). Natural and anthropogenic controls of nutrient input to estuaries from temperate to tropical regions. (Keynote Lecture) In: Proceedings 10th International Estuarine Biogeochemistry Symposium "Estuaries in a Changing World", Xiamen.

Yuwono, E., T. Jennerjahn, M.H. Sastranegara & P. Sukardi (eds.) (2007). Synopsis of ecological and socio-economic aspects of tropical coastal ecosystem with special reference to Segara Anakan. Conference Proceedings, Research Institute, Jenderal Soedirman University, Purwokerto, 61 p.

Baumgart, A., T. Jennerjahn, N. Krueck & W.S. Pranowo (2007). Stable carbon and nitrogen isotope distribution in the water column and sediments in the Indian Ocean upwelling region off Java and Sumatra, Indonesia. Conference Proceedings: European Geoscience Union General Assembly 2007, Vienna.

Krück, N. & T. Jennerjahn (2006). Sedimentary organic matter distribution in the Indian Ocean off Sumatra and Java, Indonesia, related to upwelling. Conference Proceedings: SLAS Southeast Asia Coastal Governance and Management Forum: Science Meets Policy for Coastal Management and Capacity Building, Bali, Indonesia

Baumgart, A., T. Jennerjahn & W.S. Pranowo (2006). Nutrient distribution in the Indian Ocean off Java and Sumatra, Indonesia, related to coastal upwelling; Conference Proceedings: SLAS Southeast Asia Coastal Governance and Management Forum: Science Meets Policy for Coastal Management and Capacity Building, Bali, Indonesia.

Schroeder, F., H.-D. Knauth, K. Pfeiffer, I. Nöhren, K. Duwe, T. Jennerjahn, V. Ittekkot, S. Adi & D. Agus (2003). (Vortrag) Integrated water quality assessment of the Brantas estuary, Indonesia - measurements and modeling. Proc. PACON 2003, session CST-8B Coastal Environmental Problems, 30.11.-3.12.2003, Kaohsiung, Taiwan Province of China.

Jennerjahn, T.C., D. Unger, P. Schäfer & V. Ittekkot (2000). Biogeochemistry of settling particles in tropical marine regions affected by river inputs. (Poster) Biogeochemical Cycles: German contributions to the International Joint Global Ocean Flux Study, JGOFS-Workshop, 18.-21. September 2000, Fachbereich Geo¬wissenschaften, Universität Bremen.

Jennerjahn, T. & A. Cremer (2000). Preliminary results of leg M44/1: Oceanography.- In Eastern Mediterranean Sea – Northern Red Sea, Cruise M44 (eds. J. Pätzold, P.E. Halbach, G. Hempel & H. Weikert), METEOR-Berichte, Universität Hamburg, 00-3: 31-32.

Suthhof, A., T. Rixen, T.C. Jennerjahn, T.C., P. Schäfer & V. Ittekkot (2000). Steuerungsprozesse des Partikelflusses am pakistanischen Kontinentalhang.- In Bericht über den 8. JGOFS-Workshop, 2.-3. Dezember 1999 in Bremen, (eds. B. Schlünz & G. Wefer), Berichte, Fachbereich Geowissenschaften, Universität Bremen.

Jennerjahn, T.C., V. Ittekkot, H.W. Arz & P.M. Grootes (1999). Climate-induced environmental changes on the continent controlled carbon accumulation in late Quaternary sediments from the Brazilian continental margin.- Abstracts AGU Fall Meeting, 13.-17.12.1999, San Francisco, Paper No. U12A-14.

Jennerjahn, T.C., V. Ittekkot, C.E.V. Carvalho, A.R.C. Ovalle, C.E. Rezende & H. Erlenkeuser (1998). Temporal variability of amino acid, hexosamine and carbohydrate fluxes to the Brazilian continental margin related to discharge of the São Francisco River.- In Bericht über den 7. JGOFS-Workshop, 3.-4. Dezember 1998 in Bremen, (eds. B. Schlünz & G. Wefer), Berichte, Fachbereich Geowissenschaften, Universität Bremen.

Jennerjahn, T.C., V. Ittekkot, I.M.O. Silveira, M. Tintelnot, G. Irion, H. Erlenkeuser, P.M. Grootes, C.E.V. Carvalho, A.R.C. Ovalle & C.E. Rezende (1997). Mangroves along the Brazilian coast – carbon sinks or sources. In Muddy Coasts '97, Abstract Volume (eds. B.W. Flemming, M.T. Delafontaine & G. Liebezeit), Forschungszentrum Terramare, Berichte, Nr. 2: 48-49.

Jennerjahn, T.C., V. Ittekkot, M. Tintelnot, H. Erlenkeuser, P.M. Grootes, H.W. Arz, J. Pätzold, C.E.V. Carvalho, A.R.C. Ovalle & C.E. Rezende (1997). Nature of the organic matter in Late Quaternary mangroves and continental margin sediments of eastern Brazil.- In Muddy Coasts '97, Abstract Volume (eds. B.W. Flemming, M.T. Delafontaine & G. Liebezeit), Forschungszentrum Terramare, Berichte, Nr. 2: 85-86.

Jennerjahn, T.C., V. Ittekkot, C.E.V. Carvalho, A.R.C. Ovalle, C.E. Rezende & I.M.O. Silveira (1997). Amino acid, hexosamine and carbohydrate fluxes to the Brazilian continental margin: Impact of the São Francisco River.- In Bericht über den 5. JGOFS-Workshop, 27.-28. November 1996 in Bremen, (eds. M. Giese & G. Wefer), Berichte, Fachbereich Geowissenschaften, Universität Bremen, Nr. 89: 24.

Jennerjahn, T., V. Ittekkot, M. Tintelnot, G. Irion, C.E.V. Carvalho, A.R.C. Ovalle, C.E. Rezende & I.M.O. Da Silveira (1996). Verteilung und Reaktivität organischer Substanz in Mangrovengebieten und am Kontinentalrand Ost¬brasiliens (8° - 24°S).- Abstracts 15.Geowiss. Lateinamerika-Kolloq., 16.-18.10. 1996, Hamburg, Terra Nostra 8/96: 69.

Jennerjahn, T., V. Ittekkot, A. Suthhof, I.M.O. Silveira, A.R.C. Ovalle, C.E. Rezende & C.E.V. Carvalho (1996). Organic carbon enrichment factors along the Brazilian and Pakistan continental margins.- Abstracts AGU Fall Meeting, 15.-19.12.1996, San Francisco, Paper No. OC72B-16: F293.

Jennerjahn, T.C., V. Ittekkot & C.E.V. Carvalho (1996). Partikelfluß am brasilianischen Kontinentalrand.- In Bericht über den 4. JGOFS-Workshop, 20.-21. November 1995 in Bremen, (eds. M. Giese & G. Wefer), Berichte, Fachbereich Geowissenschaften, Universität Bremen, Nr. 70: 22.

Barrocas, P.R.G., J.C. Wasserman, F. Pivetta & T. Jennerjahn (1995). Geochemistry of mercury in sediments from a tropical estuary: Guanabara Bay, Rio de Janeiro, Brazil.- In Heavy Metals in the Environment, 10th Int. Conference, 18.-22.9.1995, Hamburg: 178-181.

Tintelnot, M., T.C. Jennerjahn, M. Hübner, G. Irion, V. Ittekkot, J.O. Morais & A. Brichta (1994). Sedimentological and geochemical indicators of river supply along the Brazilian continental margin.- In The South Atlantic Ocean: Present and Past Circulation, Symposium Bremen, 15.-19.8.1994, Ber. FB Geow., Univ. Bremen 52: 154-156.

Tintelnot, M., T.C. Jennerjahn, M. Hübner, G. Irion, V. Ittekkot, J.O. Morais & A. Brichta (1994). Sedimentological and geochemical indicators of river supply along the Brazilian continental margin.- In The South Atlantic Ocean: Present and Past Circulation, Symposium Bremen, 15.-19.8.1994, Ber. FB Geow., Univ. Bremen 52: 154-156.

Books

Auel, H., T.C. Jennerjahn & J. Salita (2009). Tropical aquatic ecosystems – from large to small. In Tropical Waters and their Living Resources: Ecology, Assessment and Management, (ed. M. Wolff), Hauschild, Bremen, p. 25-45.

Unger, D. & T. Jennerjahn (2009). Regional variability in the biogeochemistry of settling particles in the tropical Indian Ocean.- In Indian Ocean Biogeochemical Processes and Ecological Variability, (eds. J. Wiggert, S.W.A. Naqvi, S. Smith & R.R. Hood), American Geophysical Union, Washington DC, 257-280.

Jennerjahn, T.C. (2009). Natural vs. human factors controlling dissolved and particulate river loads of tropical Asia. In Critical States: Environmental Challenges of Development in Monsoon Southeast Asia, (eds. L. Lebel, A. Snidvongs, C.-T.A. Chen). A Joint APN-START-MAIRS Assessment Report. Gerakbudaya, Kuala Lumpur, p. 281-291.

Jennerjahn, T.C. (2008). Global climate and regional environmental change affecting coastal ecosystems: 1. Biogeochemistry during Anthropocene. In Coastal Ecosystems – Hazards, Management and Rehabilitation, (ed. R.K. Datta). Centre for Science & Technology of the Non-Aligned And Other Developing Countries (NAM S&T Centre), Daya Publishing House, Delhi, p. 64-77.

Knoppers, B., P.R.P. Medeiros, W.F.L. de Souza & T. Jennerjahn (2006). The São Francisco Estuary, Brazil. In Water Pollution in Estuaries. Handbook of Environmental Chemistry, Vol. 5., P.Wangersky (Ed.), Springer Verlag, Berlin, p. 51-70.

Jennerjahn, T.C., B.A. Knoppers, W.F.L. de Souza, G.J. Brunskill & E.I.L. Silva (2006). Factors controlling dissolved silica in tropical rivers.- In The Silicon Cycle. Human Perturbations and Impacts on Aquatic Systems., (eds. V. Ittekkot, D. Unger, C. Humborg & N. Tac An), SCOPE 66, Island Press, Washington D.C., p. 29-51.

Das, B.K., P. Schäfer & T.C. Jennerjahn (1999). Biogeochemical studies in lesser Himalayan lakes of Jammu District, India.- SCOPE Sonderband, Mitt. Geol.-Paläont. Inst. Univ. Hamburg 82: 245-253.

Jennerjahn, T.C., V. Ittekkot & C.E.V. Carvalho (1996). Preliminary data on particle flux off the São Francisco River, Eastern Brazil.- In Particle Flux in the Ocean (eds. V. Ittekkot, P. Schäfer, S. Honjo & P.J. Depetris), SCOPE Report 57, Wiley, Chichester: 215-222.

Jennerjahn, T.C., G. Liebezeit, S. Kempe, L.Q. Xu, W.B. Chen & H.K. Wong (1992). Particle flux in the northern South China Sea.- In Marine Geology and Geophysics of the South China Sea (eds. J. Xianglong, H.R. Kudrass & G. Pautot), China Ocean Press: 228-235.

Cook, P.J., B.U. Haq, G.R. Heath, J.L. Hyland, T.C. Jennerjahn, C.S. Johnston, J.M. Skei, C.P. Summerhayes & P.K. Takahashi (1992). Group report: Offshore petroleum hydrocarbon exploitation - reserves, impacts, and alternatives.- In Use and Misuse of the Seafloor (eds. K.J. Hsü & J. Thiede), Dahlem Workshop Reports, Environmental Sciences Research Report 11, Wiley & Sons, Chichester: 337-356.

Kempe, S. & T.C. Jennerjahn (1988). The vertical particle flux in the northern North Sea, its seasonality and composition.- In Biogeochemistry and Distribution of Suspended Matter in the North Sea and Implications to Fisheries Biology (eds. S. Kempe, G. Liebezeit, V. Dethlefsen & U. Harms), Mitt. Geol.-Paläontol. Inst. Univ. Hamburg 65: 229-268.
Allgemeine Publikationen

Jennerjahn, T. & E. Krain (2005). Natürlicher Schutz vor Tsunamis - das deutsch-indo¬nesische SPICE-Programm. E.velop - Das Entwicklungsmagazin der Bundesregierung, online-Publikation, Nr. 29, 04/2005

Eickhoff, S., V. Ittekkot & T. Jennerjahn (2004). Der gestörte Siliziumkreislauf.- Forschung – Das Magazin der Deutschen Forschungsgemeinschaft, Okt. 2004.

Eickhoff, S. & T. Jennerjahn (2003). Nachhaltiges Küstenmanagement in Asien - ein internationales Forschungsnetzwerk ergreift gezielte Maßnahmen.- e.velop – Das Entwicklungsmagazin der Bundesregierung, online-Publikation, Nr. 13, 09/2003.

Jennerjahn, T.C. & S. Kempe (1991). Tschernobyl in der Nordsee - Schwebstoffe schreiben die Atomkatastrophe in das Geschichtsbuch der Erde.- In Kurs Nord - Meeresforschung mit Valdivia (ed. H. Thiel), Westholsteinische Verlagsanstalt Boyens & Co., Heide: 31-36.

General Publications

Jennerjahn, T. & E. Krain (2005). Natürlicher Schutz vor Tsunamis - das deutsch-indo¬nesische SPICE-Programm. E.velop - Das Entwicklungsmagazin der Bundesregierung, online-Publikation, Nr. 29, 04/2005

Eickhoff, S., V. Ittekkot & T. Jennerjahn (2004). Der gestörte Siliziumkreislauf.- Forschung – Das Magazin der Deutschen Forschungsgemeinschaft, Okt. 2004.

Eickhoff, S. & T. Jennerjahn (2003). Nachhaltiges Küstenmanagement in Asien - ein internationales Forschungsnetzwerk ergreift gezielte Maßnahmen.- e.velop – Das Entwicklungsmagazin der Bundesregierung, online-Publikation, Nr. 13, 09/2003.

Jennerjahn, T.C. & S. Kempe (1991). Tschernobyl in der Nordsee - Schwebstoffe schreiben die Atomkatastrophe in das Geschichtsbuch der Erde.- In Kurs Nord - Meeresforschung mit Valdivia (ed. H. Thiel), Westholsteinische Verlagsanstalt Boyens & Co., Heide: 31-36.

University teaching

Biogeochemistry of mangroves: highly productive ecosystems of the tropics
Lectures and practicals on the 'Biogeochemical cycling of elements in the aquatic environment'
Marine biogeochemistry