Søren Christensen

Research output

Research output per year 1980 1992 1994 1995 1996 2000 2001 2007 2012 2019

• 101 Journal article
• 6 Book chapter
• 5 Conference abstract in journal
• 2 Conference abstract for conference
• 6 More
  • 2 Letter
  • 1 Conference abstract in proceedings
  • 1 Report chapter
  • 1 Paper
  • 1 Poster

Research output per year

Research output per year

Search results

• 2001

  An examination of the biodiversity-ecosystem function relationship in arable soil microbial communities

  Griffiths, B. S., Ritz, K., Wheatley, R., Kuan, H. L., Boag, B., Christensen, S., Ekelund, F., Sørensen, S. J., Muller, S. & Bloem, J., 2001, In: Soil Biology & Biochemistry. 33, 12-13, p. 1713-1722

  Research output: Contribution to journal › Journal article › Research › peer-review

  • Biodiversity 100%
  • arable soils 84%
  • ecological function 83%
  • Ecosystem 80%
  • Soil 78%
  209 Citations (Scopus)

• Combined assessment of methane oxidation and nitrification; an indicator of air-borne soil pollution?

  Christensen, S., Degórska, A. & Priemé, A., 2001, In: Biology and Fertility of Soils. 34, p. 325-333

  Research output: Contribution to journal › Journal article › Research › peer-review

  5 Citations (Scopus)

• Distribution with depth of protozoa, bacteria, and fungi in soil profiles from three Danish forest sites

  Ekelund, F., Rønn, R. & Christensen, S., 2001, In: Soil Biology & Biochemistry. 33, p. 475-481

  Research output: Contribution to journal › Journal article › Research › peer-review

  122 Citations (Scopus)

• Effect of elevated atmospheric CO2 and vegetation type on microbiota associated with decomposing straw

  Frederiksen, H. B., Rønn, R. & Christensen, S., 2001, In: Global Change Biology. 7, p. 313-321

  Research output: Contribution to journal › Journal article › Research › peer-review

  23 Citations (Scopus)

• Effects of tylosin as a disturbance on the soil microbial community

  Westergaard, K., Müller, A. K., Christensen, S. & Sørensen, S. J., 2001, In: Soil Biology & Biochemistry. 33, p. 2061-2071

  Research output: Contribution to journal › Journal article › Research › peer-review

  128 Citations (Scopus)

• Methane oxidation in Polish forest soils of contrasting atmospheric pollution

  Christensen, S., Degórska, A. & Priemé, A., 2001, In: Atmospheric Environment. 35, p. 2795-2798

  Research output: Contribution to journal › Journal article › Research › peer-review

  3 Citations (Scopus)

• Natural perturbations, drying-wetting and freezing-thawing cycles, and the emission of nitrous oxide, carbon dioxide and methane from farmed organic soils

  Priemé, A. & Christensen, S., 2001, In: Soil Biology & Biochemistry. 33, p. 2083-2091

  Research output: Contribution to journal › Journal article › Research › peer-review

  203 Citations (Scopus)

• Reduced Particle size of plant material does not stimulate decomposition but affects the microbivorous microfauna

  Vestergaard, P., Rønn, R. & Christensen, S., 2001, In: Soil Biology & Biochemistry. 33, 12-13, p. 1805-1810

  Research output: Contribution to journal › Journal article › Research › peer-review

  • Soil 100%
  • Particle Size 96%
  • Zea mays 88%
  • particle size 81%
  • Hordeum 72%
  21 Citations (Scopus)

• Savannebrande i Afrikas Sudan-Guineabælte

  Rasmussen, K., Christensen, S., Friis, I., Kjøller, A. H., Michelsen, A., Nielsen, T. T. & Saarnak, C. F. L., 2001, In: Den ny verden. 1, p. 7-26

  Research output: Contribution to journal › Journal article › Research

• The Effect of Long Term Mercury Pollution on the Soil Microbial Community

  Müller, A. K., Westergaard, K., Christensen, S. & Sørensen, S. J., 2001, In: FEMS Microbiology Ecology. 36, 1, p. 11-19

  Research output: Contribution to journal › Journal article › Research › peer-review

  • Environmental Pollution 100%
  • Mercury 80%
  • Soil 76%
  • mercury 73%
  • Microbiota 70%
  174 Citations (Scopus)
• 2000

  Distribution of ³H within purine nucleotides of Ehrlich mouse ascites tumour cells after intraabdominal injection of myo-[2-³H]inositol

  Christensen, S., Klenow, H. & Overgaard-Hansen, K., 2000, In: Journal of Labelled Compounds and Radiopharmaceuticals. 43, 1, p. 91-96

  Research output: Contribution to journal › Journal article › Research › peer-review

  • Intraabdominal 100%
  • Purine Nucleotides 69%
  • Purine Nucleotide 68%
  • Ehrlich Tumor Carcinoma 66%
  • Ribose 65%
  1 Citation (Scopus)

• Ecosystem response of pasture soil communities to fumigation-induced microbial diversity reductions: an examination of the biodiversity-ecosystem function relationship

  Griffiths, B. S., Ritz, K., Bardgett, R. D., Cook, R., Christensen, S., Ekelund, F., Sørensen, S. J., Bååth, E., Bloem, J., de Ruiter, P. C., Dolfing, J. & Nicolardot, B., 2000, In: Oikos. 90, p. 279-294

  Research output: Contribution to journal › Journal article › Research › peer-review

  446 Citations (Scopus)

•  Effect of environmental change on the biodiversity and function of below-ground microbial communities (MICRODIVERS)

  Griffiths, B., Ritz, K., Bardgett, R., Cook, R., Christensen, S., Ekelund, F., Sørensen, S., Bååth, E., Bloem, J., de Ruiter, P., Dolfing, J. & Nicolardot, B., 2000, Terrestrial ecosystem research in Europe: successes, challenges and policy. Sutton, MA., Moreno, JM., van der Putten, WH. & Struwe, S. (eds.). Luxembourg: European Commission, p. 115-116

  Research output: Chapter in Book/Report/Conference proceeding › Book chapter › Research

• Herbivory by the wevil Strophosoma melanogrammum, causes severalfold increase in emission of monoterpenes from young Norway spruce (Picea abies)

  Priemé, A., Knudsen, T. B., Glasius, M. & Christensen, S., 2000, In: Atmospheric Environment. 34, p. 711-718

  Research output: Contribution to journal › Journal article › Research › peer-review

  28 Citations (Scopus)

• Interactions between saprotrophic fungi, bacteria and protozoa on decomposing wheat roots in soil influenced by the fungicide fenpropimorph (Corbel); a field study

  Bjørnlund, L., Ekelund, F., Christensen, S., Jacobsen, C. S., Krogh, P. H. & Johnsen, K., 2000, In: Soil Biology & Biochemistry. 32, p. 967-975

  Research output: Contribution to journal › Journal article › Research › peer-review

  27 Citations (Scopus)

• Oxidation of atmospheric methane in Northern European soils, comparison with other ecosystems, and uncertainties in the global terrestrial sink

  Smith, K. A., Dobbie, K. E., Ball, B. C., Bakken, L. R., Sitaula, B. K., Hansen, S., Brumme, R., Borken, W., Christensen, S., Priemé, A., Fowler, D., MacDonald, J. A., Skiba, U., Klemedtsson, L., Kasimir-Klemedtsson, A., Degorska, A. & Orlanski, P., 2000, In: Global Change Biology. 6, 7, p. 791-803

  Research output: Contribution to journal › Journal article › Research › peer-review

  • Ecosystem 100%
  • uncertainty 83%
  • methane 81%
  • Soil 70%
  • Methane 66%
  354 Citations (Scopus)
• 1999

  An automated technique for most-probable-number (MPN) analysis of densities of phagotrophic protists with lux-AB labelled bacteria as growth medium

  Ekelund, F., Christensen, S., Rønn, R., Buhl, E. & Jacobsen, C. S., 1999, In: Journal of Microbiological Methods. 38, 3, p. 177-182

  Research output: Contribution to journal › Journal article › Research › peer-review

  • Suspensions 100%
  • Pseudomonas fluorescens 84%
  • Bacteria 77%
  • Soil 61%
  • Growth 57%
  8 Citations (Scopus)

• A preliminary estimation of the nitrogen compounds exchange between the atmosphere and a spruce forest

  Horváth, L., Christensen, S., Führer, E., Kelecsényi, S., Mészàros, R., Nagy, Z. & Weidinger, T., 1999, In: Idojaras - Quarterly journal of the Hungarian Meteorological Service. 103, 1, p. 1-17

  Research output: Contribution to journal › Journal article › Research › peer-review

• Methane uptake by a selection of soils in Ghana with different land use

  Priemé, A. & Christensen, S., 1999, In: Journal of Geophysical Research - Oceans. 104, 19, p. 23617-23622 6 p.

  Research output: Contribution to journal › Journal article › Research › peer-review

  • Ghana 100%
  • land use 89%
  • soils 56%
  • methane 49%
  • savanna 28%
  33 Citations (Scopus)
• 1998

  Nutrients limiting microbial growth in a tropical forest soil of Ghana under different management

  Duah-Yentumi, S., Rønn, R. & Christensen, S., 1998, In: Applied Soil Ecology. 8, p. 19-24

  Research output: Contribution to journal › Journal article › Research › peer-review

  41 Citations (Scopus)
• 1997

  Seasonal and spatial variation of methane oxidation in a Danish spruce forest.

  Priemé, A. & Christensen, S., 1997, In: Soil Biology & Biochemistry. 29, p. 1165-1172

  Research output: Contribution to journal › Journal article › Research › peer-review

  111 Citations (Scopus)

• Slow increase in rate of methane oxidation in soils with time, following land use change form arable agriculture to woodland.

  Priemé, A., Christensen, S., Dobbie, K. E. & Smith, K. A., 1997, In: Soil Biology & Biochemistry. 29, p. 1269-1273

  Research output: Contribution to journal › Journal article › Research › peer-review

  106 Citations (Scopus)
• 1996

  Heterotrophic flagellates in soil, and their potential as bio-indicators

  Ekelund, F. & Christensen, S., 1996, Protistological Actualities, Proceedings of the Second European Congress of Protistology, Clermont-Ferrand, France - 21-26 July, Université Blaise Pascal de Clermont-Ferrand. Brugerolle, G. & J.-P., M. (eds.). France: Protistological Actualities, Proceedings of the Second European Congress of Protistology, Clermont-Ferrand, France - 21-26 July, Université Blaise Pascal de Clermont-Ferrand, p. 179-184

  Research output: Chapter in Book/Report/Conference proceeding › Book chapter › Research

• Nitrous oxide emission from an agricultural field: Comparison between measurements by flux chamber and micrometerological techniques

  Christensen, S., Ambus, P. L., Arah, JRM., Clayton, H., Galle, B., Griffith, DWT., Hargreaves, KJ., Klemedtsson, L., Lind, AM., Maag, M., Scott, A., Skiba, U., Smith, KA., Welling, M. & Wienhold, FG., 1 Dec 1996, In: Atmospheric Environment. 30, 24, p. 4183-4190 8 p.

  Research output: Contribution to journal › Journal article › Research › peer-review

  74 Citations (Scopus)

• Nitrous oxide emission from an agricultural field determined from soil cover boxes and comparison with micrometeorological techniques

  Christensen, S., Ambus, P., Arah, J. R. M., Clayton, H., Galle, B., Griffin, D. W. T., Hargreaves, K. J., Klemedtsson, L., Klemedtsson, L., Lind, A-M., Maag, M., Scott, A., Skiba, U., Smith, K. A., Welling, M. & Wienhold, F. G., 1996, In: Atmospheric Environment. 30, p. 4183-4190

  Research output: Contribution to journal › Journal article › Research › peer-review

• Soil respiration profiles and protozoan enumeration agree as microbial growth indicators

  Christensen, S., Rønn, R., Ekelund, F., Andersen, B. T., Damgaard, J., Friberg-Jensen, U., Jensen, L., Kiil, H., Larsen, B., Larsen, J. B., Riis, C., Thingsgaard, K., Thirup, C., Tom-Petersen, A. & Vesterdal, L., 1996, In: Soil Biology & Biochemistry. 28, 7, p. 865-868 4 p.

  Research output: Contribution to journal › Journal article › Research › peer-review

  22 Citations (Scopus)

• Spatial distribution and successional pattern of microbial activity and microfaunal populations on decomposing barley roots

  Rønn, R., Griffiths, B. S., Ekelund, F. & Christensen, S., 1996, In: Journal of Applied Ecology. 32, p. 662-672

  Research output: Contribution to journal › Journal article › Research › peer-review

• Spatial variability in CH₄ uptake in a danish forest soil and its relation to different managements techniques

  Priemé, A., Christensen, S., Galle, B., Klemedtsson, L. & Griffin, D. W. T., 1996, In: Atmospheric Environment. 30, p. 1375-1379

  Research output: Contribution to journal › Journal article › Research › peer-review
• 1995

  ³H Thymidine incorporation technique to determine soil bacterial growth rate

  Christensen, H. & Christensen, S., 1995, Methods in applied soil microbiology and biochemistry. London: Academic Press, p. 258-261

  Research output: Chapter in Book/Report/Conference proceeding › Book chapter › Research

•  An interdisciplinary approach for studying greenhouse gases at the landscape scale

  Sitaula, BK., Warner, WS., Bakken, LR., Hargreaves, K., Klemedtsson, L., Sitaula, JIB., Christensen, S. & Priemé, A., 1995, In: Norwegian Journal of Agricultural Sciences. 9, 3-4, p. 189-209 21 p.

  Research output: Contribution to journal › Journal article › Research › peer-review

  • interdisciplinary approach 100%
  • greenhouse gas 68%
  • cell 49%
  • land use 15%
  • soil 13%

• Bacterial production determined by [³H]thymidine incorporation in field rhizospheres as evaluated by comparison to rhizodeposition

  Christensen, H., Rønn, R., Ekelund, F. & Christensen, S., 1995, In: Soil Biology & Biochemistry. 27, 1, p. 93-99

  Research output: Contribution to journal › Journal article › Research › peer-review

  • Rhizosphere 100%
  • rhizodeposition 96%
  • Soil 69%
  • rhizosphere 65%
  • Thymidine 62%
  16 Citations (Scopus)

• Effects on protozoa

  Ekelund, F., Rønn, R., Christensen, S. & Løkke, H., 1995, Effects of Pesticides on Meso- and Microfauna in Soil. Løkke, H. (ed.). Danish Ministry of the Environment, Environmental Protection Agency, p. 27-32 6 p.

  Research output: Chapter in Book/Report/Conference proceeding › Report chapter › Research

  18 Citations (Scopus)

• Optimizing soil extract and broth media for MPN enumeration of naked amoebae and heterotrophic Flagellates in soil

  Rønn, R., Ekelund, F. & Christensen, S., 1995, In: Pedobiologia. 39, p. 10-19

  Research output: Contribution to journal › Journal article › Research › peer-review

  110 Citations (Scopus)

• Spatial and Seasonal Nitrous Oxide and Methane Fluxes in Danish Forest-, Grassland-, and Agroecosystems

  Ambus, P. L. & Christensen, S., 1 Sept 1995, In: Journal of Environmental Quality. 24, 5, p. 993-1001 9 p.

  Research output: Contribution to journal › Journal article › Research › peer-review

  144 Citations (Scopus)

• Spatial and Seasonal Series of N₂O and CH₄ fluxes in Danish forest, grassland and agroecosystems

  Ambus, P. L. & Christensen, S., 1995, In: Journal of Environmental Quality. 24, p. 993-1001

  Research output: Contribution to journal › Journal article › Research › peer-review
• 1994

  ³Hthymidine incorporation of rhizosphere bacteria influenced by plant N-status

  Christensen, H. & Christensen, S., 1994, In: Plant and Soil. 162, 1, p. 113-116

  Research output: Contribution to journal › Journal article › Research › peer-review

  • rhizosphere bacteria 100%
  • rhizosphere 85%
  • incorporation 69%
  • bacterial growth 57%
  • bacterium 53%
  8 Citations (Scopus)

• Decomposition patterns in barley root hot spots: Populations of protozoa and nematodes.

  Ekelund, F., Rønn, R. & Christensen, S., 1994, In: Journal of Eukaryotic Microbiology. 1, p. 1A

  Research output: Contribution to journal › Conference abstract in journal › Research

• Energy use and emission of greenhouse gases from grassland agriculture systems. Grasslands and Society

  Bakken, L. R., Refsgaard, K., Christensen, S. & Vatn, A., 1994, Proceedings of European Grassland Society. Wageningen Press

  Research output: Chapter in Book/Report/Conference proceeding › Book chapter › Research

• Interactions between Chromobacterium violaceum and soil protozoa

  Rønn, R., Griffiths, B., Ekelund, F. & Christensen, S., 1994, In: Journal of Eukaryotic Microbiology. p. 8A

  Research output: Contribution to journal › Conference abstract in journal › Research

• Measurement of N₂O emission from a fertilized grassland: An analysis of spatial variability

  Ambus, P. L. & Christensen, S., 20 Aug 1994, In: Journal of Geophysical Research: Atmospheres. 99, D8, p. 16549-16555 7 p.

  Research output: Contribution to journal › Journal article › Research › peer-review

  107 Citations (Scopus)

• Micrometeorological and chamber methods for measurement of nitrous oxide fluxes between soils and the atmosphere: Overview and conclusions

  SMITH, KA., CLAYTON, H., ARAH, JRM., Christensen, S., Ambus, P. L., FOWLER, D., HARGREAVES, KJ., SKIBA, U., HARRIS, GW., WIENHOLD, FG., KLEMEDTSSON, L. & GALLE, B., 20 Aug 1994, In: Journal of Geophysical Research: Atmospheres. 99, D8, p. 16541-16548 8 p.

  Research output: Contribution to journal › Journal article › Research › peer-review

  73 Citations (Scopus)

• The Effect of three different pesticides on soil protozoan activity

  Ekelund, F., Rønn, R. & Christensen, S., 1994, In: Pest Management Science. 42, p. 71-78

  Research output: Contribution to journal › Journal article › Research › peer-review

  24 Citations (Scopus)
• 1993

  Denitrification variability and control in a riparian fen irrigated with agricultural drainage water

  Ambus, P. L. & Christensen, S., 1993, In: Soil Biology & Biochemistry. 25, 7, p. 915-923 9 p.

  Research output: Contribution to journal › Journal article › Research › peer-review

  60 Citations (Scopus)

• Early spring nitrogen dynamies in a temperate forest landscape

  Groffman, P., Zau, D. R., Christensen, S., Mosier, A. & Tiedje, J. M., 1993, In: Ekologia. 74, p. 1579-1585

  Research output: Contribution to journal › Journal article › Research › peer-review

• Protozoa and nematodes on decomposing barley roots

  Griffiths, B. S., Ekelund, F., Rønn, R. & Christensen, S., 1993, In: Soil Biology & Biochemistry. 25, p. 1293-1295

  Research output: Contribution to journal › Journal article › Research › peer-review

  30 Citations (Scopus)

• Similar N₂O flux from soil measured with different chamber techniques

  Ambus, P. L., CLAYTON, H., ARAH, JRM., SMITH, KA. & Christensen, S., 1 Jan 1993, In: ATMOSPHERIC ENVIRONMENT PART A-GENERAL TOPICS. 27, 1, p. 121-123 3 p.

  Research output: Contribution to journal › Journal article › Research › peer-review

  23 Citations (Scopus)
• 1992

  Bacterial incorporation of tritiated thymidine and populations of bacteriophagous fauna in the rhizosphere of wheat

  Christensen, H., Griffiths, B. & Christensen, S., 1992, In: Soil Biology & Biochemistry. 24, 7, p. 703-709

  Research output: Contribution to journal › Journal article › Research › peer-review

  • Rhizosphere 100%
  • Triticum 77%
  • Soil 69%
  • rhizosphere 65%
  • Thymidine 62%
  50 Citations (Scopus)

• Huge increases in bacterivores on freshly killed barley roots

  Christensen, S., Griffiths, B., Ekelund, F. & Rønn, R., 1992, In: FEMS Microbiology Ecology. 86, 4, p. 303-310

  Research output: Contribution to journal › Journal article › Research › peer-review

  • bacterivores 100%
  • Hordeum 91%
  • barley 75%
  • Soil 69%
  • soil 32%
  57 Citations (Scopus)

• Local increase in protozoan numbers of decomposing barley roots in soil

  Rønn, R., Ekelund, F., Christensen, S. & Griffiths, B., 1992, In: European Journal of Protistology. 3, p. 355 1 p.

  Research output: Contribution to journal › Conference abstract in journal › Research

• Nitrogen turnover rates in a riparian fen determined by ¹⁵N dilution

  Ambus, P. L., MOSIER, A. & Christensen, S., 1 Dec 1992, In: Biology and Fertility of Soils. 14, 4, p. 230-236 7 p.

  Research output: Contribution to journal › Journal article › Research › peer-review

  24 Citations (Scopus)