Ib Johnsen

Research output

Research output per year 1973 1995 1997 1999 2000 2009 2016

• 22 Journal article
• 15 Book chapter
• 9 Report
• 6 Book
• 6 More
  • 3 Report chapter
  • 1 Conference abstract in proceedings
  • 1 Preface/postscript
  • 1 Poster

Research output per year

Research output per year

Search results

• 2016

  Effects of weed harrowing frequency on beneficial arthropods, plants and crop yield

  Navntoft, S., Kristensen, K., Johnsen, I., Jensen, A-M. M., Sigsgaard, L. & Esbjerg, P., 1 Feb 2016, In: Agricultural and Forest Entomology. 18, 1, p. 59-67 9 p.

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

  2 Citations (Scopus)
• 2014

  Nitrogen limitation in the coastal heath at Anholt, Denmark

  Johnsen, I., Christensen, S. & Riis-Nielsen, T., Aug 2014, In: Journal of Coastal Conservation. 18, 4, p. 369-382 14 p.

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

  3 Citations (Scopus)

• Rhynchostegium megapolitanum (Web. et Mohr) B.S.G.-A rare bryophyte in dune ecosystems of Zealand, Denmark

  Johnsen, I., 2014, In: American Journal of Plant Sciences. 5, 9, p. 1378-1383 6 p.

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

  • Rhynchostegium megapolitanum 100%
  • Rosa rugosa 70%
  • dunes 51%
  • Bryophyta 50%
  • Denmark 48%
  2118 Downloads (Pure)
• 2012

  The wild flora biodiversity in pesticide free bufferzones along old hedgerows

  Andresen, L. C., Nothlev, J., Kristensen, K., Navntoft, S. & Johnsen, I., May 2012, In: Journal of Environmental Biology. 33, 3, p. 565-572 8 p.

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

  • Biodiversity 100%
  • hedgerow 99%
  • Pesticides 95%
  • Pesticide 64%
  • flora 63%
  2 Citations (Scopus)
• 2011

  Blandt krone-epifytter i øjenhøjde på Store Løvklit i Kærgård Plantage

  Søchting, U., Hellensten, H. S., Smenge, C. G. S., Thirslund, K. B., Lund, F. M. S., Petersen, C. B. P. & Johnsen, I., May 2011, In: URT. 2011, 2, p. 74-79 6 p.

  Research output: Contribution to journal › Journal article › Research
• 2009

  Biological effects

  Johnsen, I., 2009, Air Pollution: from a local to a global perspective. Fenger, J. & Tjell, J. C. (eds.). Royal Society of Chemistry, p. 363-389 26 p.

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

• Bufferzoner på bare 6 m’s bredde: en fantastisk mulighed for at bringe noget natur tilbage i agerlandet.

  Esbjerg, P., Navntoft, S., Kristensen, K., Andresen, L. C., Sigsgaard, L., Nimgaard, R. B. & Johnsen, I., 2009, Miljøstyrelsen. 5 p.

  Research output: Book/Report › Book › Communication

• Buffer zones for biodiversity of plants and arthropods: is there a compromise on width?

  Navntoft, S., Sigsgaard, L., Nimgaard, R. B., Esbjerg, P., Kristensen, K., Andresen, L. C. & Johnsen, I., 2009, Danish Ministry of the Environment, Environmental Protection Agency. 103 p. (Pesticides research; No. 127).

  Research output: Book/Report › Report › Research

• Root uptake of lead by Norway spruce grown on ²¹⁰Pb spiked soils

  Hovmand, M. F., Nielsen, S. P. & Johnsen, I., 2009, In: Environmental Pollution. 157, 2, p. 404-409 6 p.

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

  • Needles 100%
  • Lead 88%
  • Soils 74%
  • Experiments 16%
  44 Citations (Scopus)
• 2008

  Atmospheric heavy metal deposition accumulated in rural forest soils of southern Scandinavia

  Hovmand, M. F., Kemp, K., Kystol, J., Johnsen, I., Riis-Nielsen, T. & Pacyna, J. M., 2008, In: Environmental Pollution. 155, 3, p. 537-541 5 p.

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

  • Heavy metals 100%
  • Soils 60%
  • Arsenic 28%
  • Cadmium 26%
  • Vanadium 23%
  64 Citations (Scopus)

• Ny diagnostik af neuromuskulaere sygdomme. Dansk Selskab for Klinisk Neurofysiologi

  Translated title of the contribution: New diagnostics of neuromuscular diseases. The Danish Society of Clinical NeurophysiologyCrone, C., Andersen, B., Krarup, C. & Johnsen, B., 2008, In: Ugeskrift for læger. 170, 12, p. 1042

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

• Rynket Roses (Rosa rugosa) påvirkning af diversitet og jordbundsfaktorer i et naturligt klitøkosystem ved Køge Bugt

  Vestergaard, P. & Johnsen, I., 2008.

  Research output: Contribution to conference › Poster › Research
• 2007

  Rynket rose (Rosa rugosa) i Danmark: rapport fra workshop på Biologisk Institut, Københavns Universitet, 5.-6. september 2006

  Weidema, I. (ed.), Ravn, H. P. (ed.), Vestergaard, P. (ed.), Johnsen, I. (ed.) & Svart, H. E. (ed.), 2007, København: Københavns Universitet og Skov- og Naturstyrelsen. 77 p.

  Research output: Book/Report › Report › Research

  2756 Downloads (Pure)
• 2006

  Effcts on flora and fauna of harrowing organic fields. Final report to the Danish EPA concerning the effects of harrowing intensity on flora and fauna on organically cultivated wheat fields. S Navntoft & BS Petersen (red.)

  Johnsen, I., 2006, København. 50 p.

  Research output: Book/Report › Report › Communication

• Impact of the invasive, non-native shrub Rosa rugosa Thunb. on a Danish coastal sand dune ecosystem.

  Johnsen, I. & Vestergaard, P., 2006, Ikke angivet. Rabitsch, W., Klingenstein, F. & Essl, F. (eds.). BfN - Skripten, p. 160-160

  Research output: Chapter in Book/Report/Conference proceeding › Conference abstract in proceedings › Research

• Restoration of dune habitats along the Danish west coast, revised version August 2006. Final report concerning LIFE project LIFE02/NAT/DK/8584. HS Jensen (red.)

  Johnsen, I., Riis-Nielsen, T., Christensen, S. N. & Petersen, M. R., 2006, København. 70 p.

  Research output: Book/Report › Report › Communication
• 2004

  Botanical Investigations in the Thule Air Base area

  Johnsen, I., 2004, Baseline Ecological Survey, Thule Air Base Zological and Botanical Inventory of the Thule Air Base and North Star Bay. København, p. 40

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

• Fremtidens natur i Danmark

  Johnsen, I., 2004, Fremtidens natur i Danmark. København: Projekt EDB I Undervisningen, p. 1-160

  Research output: Chapter in Book/Report/Conference proceeding › Book chapter › Research
• 2003

  Monitoring programmes - intensive

  Johnsen, I., 2003, Restoration of Dune Habitats Along the Danish West Coast. Miljøministeriet, p. 13

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

• Wild flora. Flora and fauna changes during conversion from conventional to organic farming

  Johnsen, I. & Jensen, A-M. M., 2003, Flora and fauna changes during conversion from conventional to organic farming.. 74 ed. København: Frontlinien, Miljøministeriet, p. 17-33

  Research output: Chapter in Book/Report/Conference proceeding › Report chapter › Research
• 2002

  Evaluation of the research at Zackenberg

  Johnsen, I. & Illeris, L., 2002, København. 15 p.

  Research output: Book/Report › Report › Communication

• Final report for the Botanical Studies, Hulsig Hede

  Johnsen, I. & Christensen, S. N., 2002, Aalborg. 42 p.

  Research output: Book/Report › Report › Communication

• Vegetationsudvikling på heder i Ringkøbing amt fra 1985 til 2002

  Christensen, S. N., Johnsen, I. & Søchting, U., 2002, København: Botanisk Institut.

  Research output: Book/Report › Report › Research
• 2001

  The lichen-rich coastal heath vegetation on the isle of Anholt, Denmark - conservation and management

  Christensen, S. & Johnsen, I., 2001, In: Journal of Coastal Conservation. 7, p. 13-21 9 p.

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

  9 Citations (Scopus)

• The lichen-rich coastal heath vegetation on the isle of Anholt, Denmark - description, history and development

  Christensen, S. & Johnsen, I., 2001, In: Journal of Coastal Conservation. 7, p. 1-12 12 p.

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

  17 Citations (Scopus)
• 2000

  Air pollution problems

  Johnsen, I., 2000, Principles of Pollution Abatement. Oxford, UK: Elsevier, p. 357-377

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

• Danmarks natur og den naturvidenskabelige forskning

  Johnsen, I., 2000, Redegørelse fra NATFAK til Forskningsministeren og Undervisningsministeren, bilag B. p. 5-5

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

• Effekter af reduceret pesticidforbrug på flora & fauna i agerlandet

  Esbjerg, P., Jensen, A-M. M. & Johnsen, I., 2000, København. 50 p.

  Research output: Book/Report › Report › Research

• Epifyterne på træerne på Æbelø

  Johnsen, I., 2000, .. aage V. Jensens Fonde, p. 81-85

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

• Eutrofiering - én af de største trusler mod den danske natur

  Johnsen, I., 2000, In: URT. 24, p. 154-156

  Research output: Contribution to journal › Journal article › Research

• Naturovervågning - et nødvendigt element i vor naturforvaltning

  Johnsen, I., 2000, In: URT. 24, p. 42-43

  Research output: Contribution to journal › Journal article › Research

• Nordic Empetrum dominated ecosystems: Function and susceptibility to environmental changes

  Tybirk, K., Nilsson, M-C., Michelsen, A., Kristensen, H. L., Shevtsova, A., Strandberg, M. T., Johansson, M., Nielsen, K. E., Riis-Nielsen, T., Strandberg, B. & Johnsen, I., 2000, In: Ambio. 29, p. 90-97

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

  98 Citations (Scopus)

• Plantelivet i Sydsjælland

  Johnsen, I., 2000, Københavns Universitets Almanak 2001. p. 173-184

  Research output: Chapter in Book/Report/Conference proceeding › Book chapter › Research
• 1999

  Botaniske undersøgelser i Hulsig Hede. Delrapport 1998

  Johnsen, I. & Christensen, S. N., 1999

  Research output: Book/Report › Report › Communication

• Effekter af reduceret pesticidforbrug på flora og fauna i agerlandet

  Johnsen, I., Jensen, A-M. & Esbjerg, P., 1999, København. 46 p.

  Research output: Book/Report › Book › Research

• Hederne og likénhederne på Anholt

  Johnsen, I., 1999, Hedens kultur og natur. København: Projekt EDB I Undervisningen, p. 16-21

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

• Integration udbedes

  Johnsen, I., 1999, In: DMU Nyt. 3, p. 5-6

  Research output: Contribution to journal › Journal article › Research

• Om strukturudviklingens naturkonsekvenser

  Johnsen, I., 1999, Naturrådets Temarapport, 1. København: N. Olaf Møller, p. 61-66

  Research output: Chapter in Book/Report/Conference proceeding › Book chapter › Research
• 1997

  Ecosystem vulnerability to climate change in Greenland and the Faroe Islands

  Heide-Jørgensen, H. & Johnsen, I., 1997, In: Arbejdsrapport fra Miljøstyrelsen (Working report). 97, p. 1-266

  Research output: Contribution to journal › Journal article › Research

• Hederne på Anholt - Botaniske undersøgelser

  Johnsen, I., 1997, Århus: Århus Amts Publikationsart. 30 p.

  Research output: Book/Report › Book › Research

• Høj-arktisk vegetation i Grønland

  Heide-Jørgensen, H. & Johnsen, I., 1997, In: Naturens Verden. 1997 (6), p. 208-223

  Research output: Contribution to journal › Journal article › Research

• The effects of UV-B radiation on European heathland species

  Björn, L. O., Callaghan, T. V., Johnsen, I., Lee, J. A., Manetas, Y., Paul, N. D., Sonesson, M., Wellburn, A. R., Coop, D., Heide-Jørgensen, H., Gehrke, C., Gwynn-Jones, D., Johanson, U., Kyparissis, A., Levizou, E., Nikolopoulos, D., Petropoulou, Y. & Stephanou, M., 1997, In: Plant Ecology. 128, 1-2, p. 253-264

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

  • heathland 100%
  • heathlands 94%
  • ozonosphere 57%
  • Pinus pinea 54%
  • radiation 53%
  84 Citations (Scopus)

• Økologi - En grundbog

  Fog, K. & Johnsen, I., 1997, København: Gad. 423 p.

  Research output: Book/Report › Book › Research
• 1996

  Nature management in the Anholt desert - Proceedings from Conference at Anholt 3. - 5. september 1996

  Johnsen, I., 1996, Århus: Århus Amts Publikationsart. 35 p.

  Research output: Book/Report › Book › Research

• NATURSYN - Indlæg ved miljø- og energiministeriets konference 13. juni 1996

  Johnsen, I., 1996, København: Miljøministeriets Forlag. 50 p.

  Research output: Book/Report › Book › Research
• 1995

  Analysis of surface structures in Cladonia mitis podetia in historical and recent collections from Greenland

  Heide-Jørgensen, H. & Johnsen, I., 1995, Effects of UV-B and ozone on northern forest. Helsinki: Nordic Council of Ministers, p. 56

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

• Analysis of surface structures in Cladonia mitis podetia in historical and recent collections from Greenland

  Heide-Jørgensen, H. & Johnsen, I., 1995, Effects of UV-B and ozone on northern forest, TemaNord 579. København, p. 48

  Research output: Chapter in Book/Report/Conference proceeding › Preface/postscript › Research

• Analysis of surface structures of Cladonia mitis podetia in historic and recent collections from Greenland

  Heide-Jørgensen, H. & Johnsen, I., 1995, In: Canadian Journal of Botany. 73, 3, p. 457-464

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

  • Cladonia 100%
  • Greenland 91%
  • crust 53%
  • color 41%
  • shoot tips 20%
  5 Citations (Scopus)

• Indications of UV-B sensitivity in the lichen Cladonia mitis

  Heide-Jørgensen, H. S. & Johnsen, I., 1995, Proceedings of the first European symposium on the effects of environmental UV-B radiation on health hand ecosystems. Bruxelles: ----, p. 285-288

  Research output: Chapter in Book/Report/Conference proceeding › Book chapter › Research
• 1994

  Likenenheder - dynamik og sårbarhed

  Johnsen, I. & Søchting, U., 1994, Danske klitter, overvågning, forvaltning og forskning. København: Miljøministeriet, Skov- og Naturstyrelsen, p. 55-69

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