Christian Kjær

Research output

Research output per year 1992 1998 1999 2000 2007 2008 2019 2020 2021 2023 2024 2024

• 37 Journal article
• 28 Report
• 12 Report chapter
• 5 Poster
• 15 More
  • 5 Memorandum
  • 3 Book
  • 2 Conference abstract for conference
  • 1 Anthology
  • 1 Book chapter
  • 1 Conference abstract in proceedings
  • 1 Contribution to newspaper - Newspaper article
  • 1 PhD thesis

Research output per year

Research output per year

Search results

• 2024

  Analyse af databehov for rapportering af habitatnaturtyper i og ved vandløb

  Kjær, C., 2 Apr 2024, 24 p.. (Fagligt notat fra DCE – Nationalt Center for Miljø og Energi ; No. 18, Vol. 2024).

  Research output: Memorandum/exposition › Memorandum

  Open Access

• ANVENDELSE AF VRD-DATA FOR VURDERING AF BESTANDE OG LEVESTEDER FOR HABITATDIREKTIVETS BILAGSARTER I VANDLØB

  Boel, M. & Kjær, C., 2 Apr 2024, Aarhus University, DCE - Danish Centre for Environment and Energy. 54 p. (Videnskabelig rapport fra DCE - Nationalt Center for Miljø og Energi; No. 597, Vol. 2024).

  Research output: Book/anthology/report › Report › Commissioned

  Open Access

• Arter 2022: NOVANA

  Kjær, C., Strandberg, M. T., Elmeros, M., Hansen, R. R., Brunbjerg, A. K., Bladt, J. & Mikkelsen, P., Feb 2024, Aarhus University, DCE - Danish Centre for Environment and Energy. 54 p. (Videnskabelig rapport fra DCE - Nationalt Center for Miljø og Energi; No. 593, Vol. 2024).

  Research output: Book/anthology/report › Report › Commissioned

  Open Access

• Beskrivelse af metoder til faglig kvalitetssikring af dataemner i NOVANA vandløbsrapportering: Version 3

  Kjær, C., 5 Apr 2024, 16 p.. Apr 05, 2024. (Fagligt notat fra DCE – Nationalt Center for Miljø og Energi ; No. 20, Vol. 2024).

  Research output: Memorandum/exposition › Memorandum

  Open Access

• Miljøfarlige forurenende stoffer 2023: NOVANA

  Lassen, P., Larsen, M. M., Kjær, C., Johansson, L. S., Strand, J., Tairova, Z., Sørensen, P. B. & Damgaard, C., 9 Nov 2024, Aarhus University, DCE - Danish Centre for Environment and Energy. 207 p. (Videnskabelig rapport fra DCE - Nationalt Center for Miljø og Energi; No. 634, Vol. 2024).

  Research output: Book/anthology/report › Report › Commissioned

  Open Access

• Vandløb 2022: NOVANA

  Thodsen, H., Kjær, C., Tornbjerg, H., Rolighed, J., Larsen, S. E. & Blicher-Mathiesen, G., 27 Feb 2024, Aarhus University, DCE - Danish Centre for Environment and Energy. 83 p. (Videnskabelig rapport fra DCE - Nationalt Center for Miljø og Energi; No. 590, Vol. 2024).

  Research output: Book/anthology/report › Report › Commissioned

  Open Access

• Vandmiljø og Natur 2022: NOVANA. Tilstand og udvikling – faglig sammenfatning

  Hansen, A. S., Fredshavn, J. R., Bang, K., Bach, H., Nielsen, V. V., Kongsfelt, I. B., Svendsen, L. M., Blicher-Mathiesen, G., Thodsen, H., Hansen, J. W., Høgslund, S., Johansson, L. S., Kjær, C., Ellermann, T., Thorling, L. & Frank-Gopolos, T., Feb 2024, Aarhus University, DCE - Danish Centre for Environment and Energy. 68 p. (Videnskabelig rapport fra DCE - Nationalt Center for Miljø og Energi; No. 594).

  Research output: Book/anthology/report › Report › Commissioned

  Open Access
• 2023

  Arter 2021: NOVANA

  Kjær, C., Elmeros, M., Heldbjerg, H., Brunbjerg, A. K., Mortensen, R. M., Bladt, J. & Mikkelsen, P., Mar 2023, Aarhus University, DCE - Danish Centre for Environment and Energy. 148 p. (Videnskabelig rapport fra DCE - Nationalt Center for Miljø og Energi; No. 530).

  Research output: Book/anthology/report › Report › Commissioned

  Open Access

• Konsensus omkring vurdering af ikke-hjemmehørende arter i Danmark

  Strandberg, B., Andersen, P., Bruhn, A., Buur, H., Carl, H., Elmeros, M., Fox, A. D., Holmstrup, M., Kjær, C., Kristensen, H. V., Slotsbo, S., Strandberg, M. T. & Wiberg-Larsen, P., Apr 2023, Aarhus: Aarhus University, DCE - Danish Centre for Environment and Energy. 48 p. (Teknisk rapport fra DCE - Nationalt Center for Miljø og Energi; No. 217).

  Research output: Book/anthology/report › Report › Commissioned › peer-review

  Open Access

• Opdatering af: Håndbog om dyrearter på habitatdirektivets Bilag IV

  Kjær, C., Adrados, L. C., Boel, M., Briggs, L., Christensen, P. K., Damm, N., Frisenvænge, J., Fog, K., Hansen, R. R., Hesselsøe, M., Mortensen, R. M., Ravn, P., Stoisek, S., Strandberg, M. T., Therkildsen, O. R. & Wiberg-Larsen, P., May 2023, Aarhus University, DCE - Danish Centre for Environment and Energy. 271 p. (Videnskabelig rapport fra DCE - Nationalt Center for Miljø og Energi).

  Research output: Book/anthology/report › Report › Commissioned

  Open Access

• Quantification of arthropod species resources using distance-based measures – ground beetles as focal group

  Hansen, R. R., Damgaard, C., Kjær, C., Blikdorff Rasksen, M., Thomsen, P. F. & Strandberg, M. T., Mar 2023, In: Ecological Indicators. 147, 9 p., 110026.

  Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaper › Journal article › Research › peer-review

  Open Access

• Vandløb 2021: Kemisk vandkvalitet, stoftransport og miljøfarlige forurenende stoffer. NOVANA

  Thodsen, H., Tornbjerg, H., Rolighed, J., Kjær, C., Larsen, S. E., Ovesen, N. B. & Blicher-Mathiesen, G., 2023, Århus Universitet. 90 p. (Videnskabelig rapport fra DCE - Nationalt Center for Miljø og Energi; No. 527).

  Research output: Book/anthology/report › Report › Commissioned › peer-review

  Open Access

• Vandmiljø og Natur 2021: NOVANA. Tilstand og udvikling - faglig sammenfatning

  Jung-Madsen, S., Kongsfelt, I. B., Fredshavn, J. R., Hansen, A. S., Nielsen, V. V., Svendsen, L. M., Blicher-Mathiesen, G., Thodsen, H., Hansen, J. W., Høgslund, S., Johansson, L. S., Nielsen, R. D., Holm, T. E., Kjær, C., Ellermann, T., Thorling, L. & Frank-Gopolos, T., 2023, Århus Universitet. 72 p. (Videnskabelig rapport fra DCE - Nationalt Center for Miljø og Energi; No. 532).

  Research output: Book/anthology/report › Report › Commissioned

  Open Access
• 2022

  Accurate image-based identification of macroinvertebrate specimens using deep learning — How much training data is needed?

  Høye, T. T., Dyrmann, M., Kjær, C., Nielsen, J., Bruus, M., Mielec, C. L., Vesterdal, M. S., Bjerge, K., Madsen, S. A., Jeppesen, M. R. & Melvad, C., Aug 2022, In: PeerJ. 10, 15 p., e13837.

  Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaper › Journal article › Research › peer-review

  Open Access

  • Classification Accuracy 100%
  • Image Identification 100%
  • Deep Learning 100%
  • Taxon 100%
  • Macroinvertebrate 100%
  15 Citations (Scopus)
• 2021

  Arter 2019: NOVANA

  Kjær, C., Nygaard, B., Therkildsen, O. R., Elmeros, M., Bladt, J. & Mikkelsen, P., Jan 2021, Aarhus University, DCE - Danish Centre for Environment and Energy. 40 p. (Videnskabelig rapport fra DCE - Nationalt Center for Miljø og Energi; No. 421).

  Research output: Book/anthology/report › Report › Commissioned

  Open Access

• Arter 2020: NOVANA

  Kjær, C., Therkildsen, O. R., Brunbjerg, A. K., Bladt, J. & Mikkelsen, P., 17 Dec 2021, Aarhus University, DCE - Danish Centre for Environment and Energy. 34 p. (Videnskabelig rapport fra DCE - Nationalt Center for Miljø og Energi; No. 476).

  Research output: Book/anthology/report › Report › Commissioned

  Open Access

• Danmarks biodiversitet 2020

  Ejrnæs, R., Nygaard, B., Kjær, C., Baattrup-Pedersen, A., Brunbjerg, A. K., Clausen, K. K., Fløjgaard, C., Hansen, J. L. S., D.D. Hansen, M., Holm, T. E., Johnsen, T. J., Johansson, L. S., Moeslund, J. E., Sterup, J., Hansen, R. R., Strandberg, B., Søndergaard, M. & Wiberg-Larsen, P., 2021, Aarhus University, DCE - Danish Centre for Environment and Energy. 270 p. (Videnskabelig rapport fra DCE - Nationalt Center for Miljø og Energi; No. 465).

  Research output: Book/anthology/report › Report › Commissioned › peer-review

  Open Access

• Miljøfarlige forurenende stoffer i vandmiljøet: NOVANA. Tilstand og udvikling 2008-2019

  Boutrup, S., Kjær, C., Johansson, L. S., Larsen, M. M., Poulsen, M. B., Bossi, R., Christensen, M. R. & Frank-Gopolos, T., 2021, Aarhus University, DCE - Danish Centre for Environment and Energy. 288 p. (Videnskabelig rapport fra DCE; No. 466).

  Research output: Book/anthology/report › Report › Commissioned

  Open Access

• Vandløb 2019: Økologisk tilstand. NOVANA

  Kallestrup, H., Kjær, C. & Bruus, M., Jan 2021, Aarhus University, DCE - Danish Centre for Environment and Energy. 22 p. (Videnskabelig rapport fra DCE - Nationalt Center for Miljø og Energi; No. 416).

  Research output: Book/anthology/report › Report › Commissioned

  Open Access

• Vandmiljø og Natur 2019: NOVANA. Tilstand og udvikling - faglig sammenfatning

  Jung-Madsen, S., Boutrup, S., Nielsen, V. V., Hansen, A. S., Svendsen, L. M., Fredshavn, J. R., Blicher-Mathiesen, G., Thodsen, H., Kallestrup, H., Hansen, J. W., Høgslund, S., Johansson, L. S., Nygaard, B., Kjær, C., Nielsen, R. D., Ellermann, T., Thorling, L. & Nielsen, L., 2021, Aarhus University, DCE - Danish Centre for Environment and Energy. 78 p. (Videnskabelig rapport fra DCE; No. 453).

  Research output: Book/anthology/report › Report › Commissioned

  Open Access

• Vandmiljø og Natur 2020: NOVANA. Tilstand og udvikling - faglig sammenfatning

  Jung-Madsen, S., Boutrup, S., Nielsen, V. V., Hansen, A. S., Svendsen, L. M., Fredshavn, J. R., Blicher-Mathiesen, G., Thodsen, H., Hansen, J. W., Høgslund, S., Johansson, L. S., Nygaard, B., Kjær, C., Ellermann, T., Thorling, L. & Frank-Gopolos, T., 2021, Aarhus University, DCE - Danish Centre for Environment and Energy. 70 p. (Videnskabelig rapport fra DCE; No. 478).

  Research output: Book/anthology/report › Report › Commissioned

  Open Access
• 2020

  Implications of heathland management for ant species composition and diversity: Is heathland management causing biotic homogenization?

  Hansen, R. R., Nielsen, K. E., Offenberg, J., Damgaard, C., Byriel, D., Schmidt, I. K., Sørensen, P. B., Kjær, C. & Strandberg, M. T., Feb 2020, In: Biological Conservation. 242, 12 p., 108422.

  Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaper › Journal article › Research › peer-review

  • Moorland 100%
  • Lowlands 20%
  • Ecosystem Engineers 20%
  • Ant Colonies 20%
  8 Citations (Scopus)

• Insekters tilbagegang: hvilke insekter går tilbage, hvorfor og hvad kan der gøres?

  Kjær, C., Ehlers, B., Bruus, M., D. D. Hansen, M., Hansen, R. R., Holmstrup, M., Høye, T. T., Jensen, J., Offenberg, J., Strandberg, B., Strandberg, M. T. & Wiberg-Larsen, P., 2020, Roskilde: Aarhus University, DCE - Danish Centre for Environment and Energy. 90 p. (Videnskabelig rapport fra DCE - Nationalt Center for Miljø og Energi; No. 388).

  Research output: Book/anthology/report › Report › Research

  Open Access

• Modelling risk of competitive effects from honeybees on wild bees

  Sørensen, P. B., Strandberg, B., Bruus, M., Kjær, C., Larsen, S., Hansen, R. R., Damgaard, C. F. & Strandberg, M., Nov 2020, In: Ecological Indicators. 118, 106749.

  Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaper › Journal article › Research › peer-review

  • Apiary 100%
  • Anthesis 25%
  • Adverse Effects 25%
  • Pollinator 25%
  • Carrying Capacity 25%
  6 Citations (Scopus)

• Pesticide risk indicator for terrestrial adult stages of aquatic insects

  Sørensen, P. B., Kjær, C., Wiberg-Larsen, P., Bruus, M., Strandberg, B., Rasmussen, J., Damgaard, C. F., Larsen, S. E. & Strandberg, M. T., Nov 2020, In: Ecological Indicators. 118, p. 106718 106718.

  Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaper › Journal article › Research › peer-review

  • Reproductives 100%
  • Aquatic Insects 100%
  • Arable Land 50%
  7 Citations (Scopus)

• Terrestrial adult stages of freshwater insects are sensitive to insecticides

  Bruus, M., Rasmussen, J. J., Strandberg, M. T., Strandberg, B., Sørensen, P. B., Larsen, S. E., Kjær, C., Lorenz, S. & Wiberg-Larsen, P., Jan 2020, In: Chemosphere. 239, 9 p., 124799.

  Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaper › Journal article › Research › peer-review

  • Confidor 100%
  5 Citations (Scopus)
• 2019

  Oversigt og status for de danske sommerfuglearter

  Høye, T. T., Olsen, K., Moeslund, J. E., Strandberg, M. T. & Kjær, C., Aug 2019, 8 p.. (Notat fra DCE - Nationalt Center for Miljø og Energi (2011-2019)).

  Research output: Memorandum/exposition › Memorandum

  Open Access

• Pesticide effects on adult freshwater insects

  Strandberg, B., Bruus, M., Kjær, C., Wiberg-Larsen, P., Rasmussen, J., Sørensen, P. B., Larsen, S. E. & Strandberg, M. T., 2019, (Submitted) In: Environmental Impact Assessment Review.

  Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaper › Journal article › Research › peer-review

• Status for forskning og anvendelse af gene drives i Danmark, herunder potentielle anvendelser

  Madsen, C. K., Damgaard, C. & Kjær, C., 21 Oct 2019, 5 p.. No. 2019-760-001329, Oct 21, 2019.

  Research output: Memorandum/exposition › Memorandum

  Open Access

  File
  97 Downloads (Pure)

• Udnævnelse af ekspert til deltagelse i EU Kommissionens "Workshop on the problem formulation for the environmental risk assessment of gene drive modified insects"

  Kjær, C., 27 Mar 2019, 1 p.. No. 2019-760-001238, Mar 27, 2019.

  Research output: Memorandum/exposition › Memorandum

  Open Access

  File
  21 Downloads (Pure)

• Use "Risk of system failure" rather than additive aggregation methods of indicators when assessing habitat quality

  Damgaard, C., Strandberg, M. T., Kjær, C. & Sørensen, P. B., 2019, In: Ecological Indicators. 107, 4 p., 105564.

  Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaper › Journal article › Research › peer-review

  • Habitat Quality 100%
  • Ecological Indicator 100%
  • Conservation Status 100%
  • Habitat Type 50%
  • Conservationist 50%
  6 Citations (Scopus)
• 2018

  Kommentarer til rapporten: ”Gene-edited organisms in agriculture: Risks and unexpected consequences”

  Gregersen, P. L., Hebelstrup, K., Holme, I., Brinch-Pedersen, H., Krogh, P. H., Damgaard, C. F. & Kjær, C., 21 Dec 2018, 8 p.

  Research output: Book/anthology/report › Report › Commissioned

  Open Access

  File
  170 Downloads (Pure)
• 2015

  Introduktion til danske insektordener

  Kjær, C., Offenberg, H. J. & Axelsen, J. A., 2015, Århus Universitet. 48 p.

  Research output: Book/anthology/report › Book › Education
• 2014

  Generalisering og validering af model for afdrift af pesticider til læhegn og andre marknære biotoper

  Bruus, M., Løfstrøm, P., Andersen, H. V. & Kjær, C., 2014, Miljøstyrelsen. 76 p. (Bekæmpelsesmiddelforskning fra Miljøstyrelsen, Vol. 147).

  Research output: Book/anthology/report › Report › Research › peer-review

• Pesticide drift deposition in hedgerows from multiple spray swaths

  Kjær, C., Bruus, M., Bossi, R., Løfstrøm, P., Andersen, H. V., Nuyttens, D. & Larsen, S. E., 2014, In: Journal of Pesticide Science. 39, p. 14-21

  Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaper › Journal article › Research › peer-review
  19 Citations (Scopus)
• 2013

  The OML-SprayDrift model for predicting pesticide drift and deposition from ground boom sprayers

  Løfstrøm, P., Bruus, M., Andersen, H. V., Kjær, C., Nuyttens, D. & Astrup, P., 2013, In: Journal of Pesticide Science. 38, 3, p. 129-138 10 p.

  Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaper › Journal article › Research › peer-review
  22 Citations (Scopus)
• 2012

  Effects of herbicides on non-target plants: How do effects in standard plant tests relate to effects in natural habitats?

  Strandberg, B., Bruus, M., Kjær, C., Damgaard, C., Andersen, H. V., Bossi, R., Løfstrøm, P., Larsen, S. E., Bak, J. L. & Kudsk, P., 2012, Miljøstyrelsen. 116 p. (Bekæmpelsesmiddelforskning fra Miljøstyrelsen; No. 137).

  Research output: Book/anthology/report › Report › Research › peer-review
• 2010

  Assessment of effects of Bt-oilseed rape on large white butterfly (Pieris brassicae) in natural habitats

  Kjær, C., Damgaard, C. & Lauritzen, A. J., 2010, In: Entomologia Experimentalis et Applicata. 134, 3, p. 304-311

  Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaper › Journal article › Research › peer-review
  9 Citations (Scopus)
• 2009

  Competitive interactions and the effect of herbivory on Bt-Brassica napus, Brassica rapa and Lolium perenne

  Damgaard, C. & Kjær, C., 2009, In: Journal of Applied Ecology. 46, p. 1073–1079

  Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaper › Journal article › Research › peer-review
  24 Citations (Scopus)

• Geographiccaly based indicator for pesticide risk

  Kjær, C., 2009, Multiple Stressors Conference: Novel methods for integrated risk assessment. Løkke, H. (ed.). National Environmental Research Institute, Aarhus University, p. 69 1 p.

  Research output: Contribution to book/anthology/report/proceeding › Conference abstract in proceedings › Research

• How to Guide and Assess Risk Reduction using Risk Characterization Indicators

  Sørensen, P. B., Brüggemann, R., Thomsen, M., Gyldenkærne, S. & Kjær, C., 2009, In: American Journal of Applied Sciences. p. 1255-1263

  Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaper › Journal article › Research › peer-review
  5 Citations (Scopus)
• 2008

  Herbicide drift into hedgerows: Extent, effects and mitigation

  Bruus Pedersen, M., Strandberg, B., Kjær, C., Løfstrøm, P. & Andersen, H. V., 2008. 2 p.

  Research output: Contribution to conference › Conference abstract for conference › Research

  Open Access

  File
  236 Downloads (Pure)

• Improved indicators and monitoring of pesticide use

  Sørensen, P. B., Kjær, C., Kudsk, P., Jørgensen, L. N., Ørum, J. E., Stjernholm, M. & Gyldenkærne, S., 2008.

  Research output: Contribution to conference › Conference abstract for conference › Research

  • Denmark 100%
  • Farmland 100%
  • Geographic Information System 100%
  • Risk Reduction 100%
  • Pesticide Application 100%

• Indikator for pesticiders belastning for naturen

  Kjær, C., Sørensen, P. B., Kudsk, P., Jørgensen, L. N., Ørum, J. E., Stjernholm, M. & Gyldenkærne, S., 2008, In: Miljoeprojekter. 1248, 72 p.

  Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaper › Journal article › Commissioned

• Omfang og effekt af herbicidafdrift til læhegn

  Translated title of the contribution: Extent and effects of herbicide drift into hedgerowsBruus, M., Andersen, H. V., Løfstrøm, P., Kjær, C., Glasius, M., Jensen, B., Strandberg, M. T., Bak, J. L., Hansen, K. M. & Bossi, R., 2008, In: Bekæmpelsesmiddelforskning fra Miljøstyrelsen. 120, p. 1-86

  Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaper › Journal article › Research

• Sound construction of risk indicators

  Sørensen, P. B., Kjær, C. & Thomsen, M., 2008.

  Research output: Contribution to conference › Poster › Research

  Open Access

  File

  • Reference Condition 100%
  213 Downloads (Pure)
• 2007

  Assessing the extent and effects of herbicide drift into Danish hedgerows

  Bruus, M., Strandberg, M. T., Andersen, H. V., Løfstrøm, P. & Kjær, C., 2007.

  Research output: Contribution to conference › Poster › Research

  • Herbicide 100%
  • Crataegus 42%
  • Fruit Set 28%
  • Prunus avium 14%
  • Arable Land 14%

• Effects of cypermethrin spray drift on pollination and fruiting of Hawthorn (Crataegus monogyna Jacq. Rosaceae)

  Strandberg, M. T., Gammeltoft, S., Kjær, C. & Pedersen, M. B., 2007.

  Research output: Contribution to conference › Poster › Research

• Indikatoren behandlingshyppighed (BH) som mål for pesticidbehandlingens miljøbelastning

  Kjær, C., Sørensen, P. B., Kudsk, P. & Jørgensen, L. N., 2007, Ministeriet for Fødevarer, Landbrug og Fiskeri. 47 p.

  Research output: Book/anthology/report › Report › Commissioned

• Ny indikator vil pege på følsomme områder

  Kjær, C., 2007, In: LandbrugsAvisen. 50, 14. december, p. 8

  Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaper › Contribution to newspaper - Newspaper article