Publication list for employee

Other publications

Refereed publications: Hofgaard, A., Dalen, L. and Hytteborn, H., 2009. Tree recruitment above the treeline and potential for climate driven treeline change. Journal of Vegetation Science 20: 1133-1144. DOI:10.1111/j.1654-1103.2009.01114.x Vlassova, T.K., Doubleday, N.C. and Hofgaard, A., 2008. Approaches, means and methods of socially-oriented observations network construction within PPS Arctic Project. Environmental Planning and Management (edited by V.M.Kotlyakov), 3-4(8-9):49-57. ISSN 1991-9344. (in Russian with abstract in English) Cornelissen, J.H.C., P.M. van Bodegom, R. Aerts, T.V. Callaghan, R.S.P. van Logtestijn, J. Alatalo, F.S. Chapin, R. Gerdol, J. Gudmundsson, D. Gwynn-Jones, A.E. Hartley, D.S. Hik, A. Hofgaard, I.S. Jónsdóttir, S. Karlsson, J.A. Klein, J. Laundre, B. Magnusson, A. Michelsen, U. Molau, V. Onipchenko, H.M. Quested, S.M. Sandvik, I.K. Schmidt, G.R. Shaver, B. Solheim, N. Soudzilovskaia, A. Stenström, A. Tolvanen, Ø. Totland, N. Wada, J.M. Welker, X.-Q. Zhao & M.O.L. Team, 2007. Global negative vegetation feedback to climate warming responses of leaf litter decomposition rates in cold biomes. Ecology Letters 10: 619-627. Mårell, A., Hofgaard, A. and Danell, K., 2006. Nutrient dynamics of reindeer forage species along snowmelt gradients at different ecological scales. Basic and Applied Ecology 7(1): 13-30. Dalen, L. and Hofgaard, A., 2005. Differential regional treeline dynamics in the Scandes Mountains. Arctic, Antarctic and Alpine Research 37(3): 284-296. Hofgaard, A., 2004. Feedbacks between northern terrestrial systems and climate. In: Gerland and Njåstad (eds.) Arctic Climate Feedback Mechanisms, Proceedings of a workshop at Norwegian Polar Institute, Tromsø, Norway 17-19 November 2003. Rapportserie Norsk Polarinstitutt 124: 23-25 Nordengren, C., Hofgaard, A. and Ball, J. P., 2003. Availability and quality of herbivore winter browse in relation to tree height and snow depth. Annales Zoologici Fennici 40(3): 305-314. Hofgaard, A. and Wilmann, B., 2002. Plant distribution patterns across the forest-tundra ecotone. The importance of treeline position. Ecoscience 9(3): 375-385. Mårell, A., Ball, J. P. and Hofgaard, A., 2002. Foraging and movements paths of female reindeer: insights from fractal analysis, correlated random walks, and Lévy flights. Canadian Journal of Zoology 80: 854-865. Callaghan, T.V., Crawford, R.M.M., Eronen, M., Hofgaard, A., Payette, S., Rees, W.G., Skre, O., Sveinbjörnsson, B., Vlassova, T.K. and Werkman, B.R., 2002. The dynamics of the tundra taiga boundary: an overview and a co-ordinated and integrated approach to research. Ambio, Special report, 12: 3-5. Sveinbjörnsson, B., Hofgaard, A. and Lloyd, A., 2002. The natural causes of the taiga-tundra boundary. Ambio, Special report, 12: 23-29. Solberg, B., Hofgaard, A. and Hytteborn, H., 2002. Shifts in radial growth responses of coastal Picea abies induced by climate change during the 20th century, Central Norway. Ecoscience, 9: 79-88. Danell, K., Hofgaard, A., Callaghan, T. V., and Ball, J. P., 1999. Scenarios for animal responses to global change in Europe's cold regions: an introduction. Ecological Bulletins 47: 8-15. Hofgaard, A., Ball, J. P., Danell, K. and Callaghan, T. V. (eds.), 1999. Animal responses to global change in the north. Ecological Bulletins 47, 187 p. Hofgaard, A., 1999. The role of “natural" landscapes influenced by man in predicting responses to climate change. Ecological Bulletins 47: 160-167. Hofgaard, A., Tardif, J and Bergeron, Y., 1999. Dendroclimatic response of Picea mariana and Pinus banksiana along a latitudinal gradient in the eastern Canadian boreal forest. Can. J. For. Res. 29: 1333-1346. Mooney, H. A. and Hofgaard, A., 1999. Biological invasions and global change. In: Sandlund, O.T., Schei, P.J. & Viken, Å., (eds) Invasive species and biodiversity management, Chapman and Hall Publishers, London. pp. 139-148. Engelmark, O., Hofgaard, A. and Arnborg, T., 1998. Successional trends 219 years after fire in an old Pinus sylvestris stand in northern Sweden. J. of Veg. Sci. 9: 583-592. Hofgaard, A., 1997. Inter-relationships between treeline position, species diversity, land-use and climate change, in the central Scandes Mountains of Norway. Global Ecology and Biogeography Letters 6: 419-429. Hofgaard, A., 1997. Structural changes in the forest-tundra ecotone: A dynamic process. In: Huntley, B., Cramer, W., Morgan, A.V., Prentice, H.C. and Allen, J.R.M. (eds.) Past and future rapid environmental changes: the spatial and evolutionary responses of terrestrial biota. pp 255-263. NATO ASI Series, Vol. I 47. Springer Verlag. Hofgaard, A., 1993. Seed rain quantity and quality, 1984-1992, in a high altitude old-growth spruce forest, northern Sweden. New Phytologist, 125: 635-640. Hofgaard, A., 1993. 50 years of change in a Swedish boreal old-growth Picea abies forest. J. of Veg. Sci. 4: 773-782. Hofgaard, A., 1993. Structure and regeneration patterns in a virgin Picea abies forest in northern Sweden. J. of Veg. Sci. 4: 601-608. Hofgaard, A., Kullman, L. and Alexandersson, H., 1991. Response of old-growth montane Picea abies (L.) Karst. forest to climatic variability in northern Sweden. New Phytol. 119: 585-594. Engelmark, O. and Hofgaard, A., 1985. The oldest Scots pine, Pinus sylvestris, in Sweden. Sv. Bot. Tidsk. 79: 415-416. (In Swedish) Hofgaard, A., 1985. Changes in a spruce forest close to the timberline during the last forty-five years. Sv. Bot. Tidsk. 79: 349-356. (In Swedish) PhD Thesis: Hofgaard, A., 1993. Natural dynamics of old-growth Picea abies forest - spatial and temporal patterns, northern Sweden. Doctoral dissertation. Swedish University of Agricultural Sciences, Umeå, Sweden. Non refereed publications: Hofgaard, A. 2009. Overvåking av palsmyr. Førstegangsundersøkelse i Ferdesmyra, Øst-Finnmark 2008. NINA Rapport 476. 34pp. Nybø, S., Strann, K.-B., Bjerke, J.W., Tømmervik, H., Hagen, D. & Hofgaard, A., 2009. Tilpasninger til klimaendringer i Nord-Norge og på Svalbard. Vurdering av vernebehovet og terrestriske økosystemers evne til å binde karbon. NINA Rapport 436. 44pp. Hofgaard, A., 2009. Norwegian monitoring program for palsa peatlands. In: Stefan Fronzek, Margareta Johansson, Torben R. Christensen, Timothy R. Carter, Thomas Friborg and Miska Luoto (eds.). Climate change impacts on sub-arctic palsa mires and greenhouse gas feedbacks. Proceedings of the PALSALARM symposium, Abisko, Sweden, 28-30 October 2008 Reports of the Finnish Environment Institute 3/2009, 74 p. Finnish Environment Institute. URN:ISBN:952-11-3362-6. ISBN 952-11-3362-6 (PDF). Available: http://www.ymparisto.fi/default.asp?contentid=311823&lan=en Hofgaard, A. & Rees, G., 2008. PPS Arctic Manual. Common protocols for field measurements and handling of collected material. PDF document available at the PPS Arctic website (http://ppsarctic.nina.no ). Hofgaard, A. 2008. Overvåking av palsmyr. Førstegangsundersøkelse i Leirpullan, Sør-Trøndelag 2007. NINA Rapport 364. 35pp. Hofgaard, A. & Rees, G. 2008. Tundra Taiga Interface (TTI) - Rationale, history and development towards the future. Project Report 2007. IASC 06/07 Bulletin, page 33-40. Hofgaard, A. 2007. Overvåking av palsmyr. Førstegangsundersøkelse i Goatteluobbal, Vest-Finnmark 2006. NINA Rapport 257. 33pp. Hofgaard, A. & Rees, G. 2006. Tundra Taiga Interface Annual Report 2006. www.iasc.se/projects 5pp. Framstad, E., Hansen-Bauer, I., Hofgaard, A., Kvamme, M. Ottesen, P., Toresen, R., Wright, R., Åndalsvik, B., Løbersli, E. & Dalen, L. 2006. Effekter av klimaendringer på økosystem og biologisk mangfold. DN-utredning 2006-2. 62pp. Hofgaard, A. 2006. Overvåking av palsmyr. Førstegangsundersøkelse i Dovre 2005, Haukskardmyrin og Haugtjørnin. NINA Rapport 154. 35pp. Callaghan, T. and 19 co-authors, 2005. Terrestrial and freshwater biosphere and biodiversity. ICARP II - Science Plan WP8, Copenhagen November 2005. 18pp. www.icarp.dk /Working Group reports. Hofgaard, A. & Rees, G. 2005. Tundra Taiga Interface Annual Report 2005. IASC project Catalogue 2005, page 74-78. Hofgaard, A. 2005. Overvåking av palsmyr. Førstegangsundersøkelse i Ostojeaggi, Troms, 2004. NINA Rapport 42. 29pp. Tombre, I. M., Andersen, O., Erikstad, L., Frivoll, V, Hofgaard, A., Sloreid, S. E., Strann, K. -B., Svestad, A., & Tømmervik, H. 2004. Basecearro vindpark. Vurdering av konsekvenser for landskap, flora, fauna, friluftsliv, kulturminner og reindriftsnæringen. - NINA Oppdragsmelding 851. 64pp. Tombre, I. M., Andersen, O., Erikstad, L., Frivoll, V, Hofgaard, A., Sloreid, S. E., Strann, K. -B., Svestad, A., & Tømmervik, H. 2004. Båtsfjordfjellet vindpark. Vurdering av konsekvenser for landskap, flora, fauna, friluftsliv, kulturminner og reindriftsnæringen. - NINA Oppdragsmelding 850. 67pp. Hofgaard, A. 2004. Effekter av klimaendringer på økologiske/biologiske systemer. DNs overvåkingsdata - potensial og kunnskapsresurs. Oppdragsmelding 848, 53pp. Hofgaard, A. 2004. Etablering av overvåkingsprosjekt på palsmyrer. NINA Oppdragsmelding 841, 32pp. Hofgaard, A., Anker-Nilssen, T., Bruteig, I.E., Kålås, J.A. and Solberg, E.J. 2004. Overvåking avdekker klimarelaterte forandringer i norsk natur. Eksempler med utgangspunkt i DN-finansierte overvåkingsdata. NINA Minirapport 70, 18pp. Callaghan, T.V., Christensen, T.R., Crill, P, Hansen-Bauer, I., Hofgaard, A., Holmlund, P. Johansson, M., Jonasson, C., Jonsdottir, I.S., Melillo, J.J., Sælthun, N.R., Shaver, G.R., and Wolf, A. 2004. Climate change and its impacts on terrestrial ecosystems and landscapes of the Arctic: insights, challenges and ways forward. Conclusions and recommendations from a workshop to explore trilateral collaboration among Sweden, Norway and the USA. Hofgaard, A. 2003. Effects of climate change on the distribution and development of palsa peatlands: background and suggestions for a national monitoring project. NINA Project Report 21. 32 pp. Trondheim. Dalen, L. and Hofgaard, A. 2003. Stationary treelines - evidence of climate insensibility or seasonally counteracting changes of the climate. Conference abstract. Arctic - Alpine ecosystems and people in a changing environment. Tromsø. Dalen, L. Hytteborn, H. and Hofgaard, A. 2002. Establishment of treeline trees and warming effects on naturally occurring saplings. Conference abstract. Ecosystem dynamics at the forest-tundra ecotone in Arctic Europe. Abisko. Dalen, L. Hytteborn, H. and Hofgaard, A. 2002. Investigate the Role and Establishment of Outlying Individual Trees. In The DART - Fifth Annual Workshop Report edited by B. Huntley Hofgaard, A. 2002. Skoggrense som anvendbar målestokk på klimaendring. In The ACIA Fagmøte - Effekter av klimaendringer på reindrift, landbruk og naturforvaltning. Norsk Polatinstitutt, Tromsø. Ims, R. A., Hofgaard, A. and Yoccoz, N. G. 2002. Spatial scaling of structural diversity in subarctic birch forest ecosystems and its relation to components of biodiversity. Conference abstract and poster. Biologisk mangfold - Dynamikk, trusler og forvaltning. Oslo. Solberg, B. Ø., Hofgaard, A. and Hytteborn, H. 2002. Effects of climate change on the growth of dominating tree species along major environmental gradients. Conference abstract and poster. Biologisk mangfold - Dynamikk, trusler og forvaltning. Oslo. Dalen, L., Hofgaard, A. and Hytteborn, H. 2001. The role and significance of outlying trees and saplings. In The DART - Fourth Annual Workshop Report edited by B. Huntley. Dalen, L., Hytteborn, H. and Hofgaard, A. 2000. Mountain birch saplings in OTCs and the effects of OTCs on wind and evaporation. Abstract. Presented at the workshop ‘From decade to Millennium: The 10th ITEX meeting'. Solberg, B. Ø., Hofgaard, A. and Hytteborn, H. 2000. Dendroclimatic response of Norway spruce and Scots pine along major environmental gradients in Central Norway. Conference abstract. In: Biologisk mangfold - Dynamikk, trusler og forvaltning. NINA Temahefte 15, p. 12. Dalen, L., Hytteborn, H. and Hofgaard, A. 2000. The role and significance of outlying trees/saplings. Page 19-23. In The DART - Third Workshop Report edited by B. Huntley. Hulme, P., Crawley, M., Hofgaard, A., Huntley, B., Lurz, P., O'Connell, M., Rushton, S., Schaffner, U., Sykes, M., Vila, M., Watt, A., and Willis, S. 2000. Terrestrial Ecosystem Research Initiative - Concerted Acition, Workgroup III Report: Alien Species and Outbreaking Species in Ecosystems. Page 44-48 in Terrestrial Ecosystem Research in Europe: successes, challenges and policy. European Commision. Hofgaard, A. and Callaghan, T. V. 1999. Preface, to Animal responses to global change in the north. Ecol. Bull. 47: 7. Solberg, B. Ø., Hofgaard, A. and Hytteborn, H. 1999. Dendroclimatic response of Norway spruce and Scots pine along major environmental gradients in Central Norway. Project report. The Research Council of Norway. Hofgaard, A., Nordengren, C. and Mårell, A. 1999. Current status of terrestrial ecology research, CIRC. Mid Term Report. Environment and Space Research Institute. Kiruna, Sweden. Page 34-35. Hytteborn, H. and Hofgaard, A. 1998. Site report - Dovre. Page 17-21 in The DART - Second Workshop Report, edited by B. Huntley. Hytteborn, H. and Hofgaard, A. 1998. Experiments on isolated ‘krummholz' trees. Page 25-27. In The DART - Second Workshop Report, edited by B. Huntley. Hill, M. O., Carey, P. D., French, D. D., Scott, D., Thomson, A. G., Welch, D., Wright, S. M., Holten, J. I., Hofgaard, A., Eilertsen, O., Wilmann, B., Borel, J.-L., Richard, L., Ozenda, P., Spada, F., Cramer, W., Huntley, B. and Allen, J. R. M. 1996. Effects of rapid climatic change on plant biodiversity in boreal and montane ecosystems. ITE Monks Wood, Huntingdon. Hofgaard, A., Cramer, W. and Eilertsen, O. 1996. Interrelationships between treeline position, species diversity, land-use and climate change, in the central Scandes montains. Page 91-113. In Effects of rapid climatic change on plant biodiversity in boreal and montane ecosystems. Final Report, edited by Mark O. Hill et al. Tømmerås, B. Å., Hofgaard, A., Wilmann, B. and Breistein, J. 1996. Fragmenteringsforsøk i granskog. Rapport etter sesongen 1995. NINA Oppdragsmelding, 402: 1-35. (In Norwegian). Hofgaard, A., Cramer, W. and Eilertsen, O. 1996. Interrelationships between treeline position, species diversity, land-use and climate change, in the central Scandes montains. Page 120-121. In Bergeron, Y. and Frisque, G. (eds.) Second international workshop on Disturbance Dynamics in Boreal Forest, Workshop abstracts, Université du Québec, Rouyn-Noranda, Canada. Hofgaard, A. 1995. Temporal dynamics of high altitude boreal spruce forest. In Groupe de recherche en écologie forestière. Colloque annuel. Programme et résumés. Université du Québec à Montréal. Hofgaard, A., Eilertsen, O. and Cramer, W. 1994. Effects of climate change on forest-tundra ecotone vegetation: population dynamics and species diversity. Page 57-63. In Effects of rapid climatic change on plant biodiversity in boreal and montane ecosystems. Second Annual Report, edited by Mark O. Hill. Hofgaard, A. 1994. Temporal dynamics of high altitude boreal spruce forest. Abstract. First GCTE Science Conference, Woods Hole, Massachusetts, USA, 23-27 May 1994. Hofgaard, A. 1992. A half century of arboreal regeneration and decease in boreal old-growth Picea abies (L.) Karst. forest, northern Sweden. In Engelmark, O. and Bradshaw, R. (eds.), Disturbance dynamics in boreal forest, Abstract volume, University of Umeå. Hofgaard, A. 1992. Boreala naturgranskogars utvecklingshistoria från istiden till idag. In Björklund, J. and Östlund, L. (eds). Norrländsk skogshistoria. Människan, skogen och industrin. Skogshistoriska seminariedagar, Umeå 8-9 april 1992. Umeå. (In Swedish) Hofgaard, A. 1991. Reserapport för "Ökologie von Gebirgswäldern, besonders natürlichen Fichtenwälden", studievistelse vid Botanisches Institut, Universität für Bodenkultur, Wien, Österrike. 10 pages. Swedish University of Agricultural Sciences, Umeå. (In Swedish) Hofgaard, A. 1989. Revitalization of a high altitude Picea abies forest over a fifty years period in the central Swedish Scandes. Abstract. Swedish Royal Academy Sciences Workshop: "Climate variations on the scale years to hundred of years and their influence on the mountain environment", Abisko, Sweden. Kullman, L. and Hofgaard, A. 1987. The limit of climatic hazard in montane forests. Swedish University of Agricultural Sciences, Umeå. 31 pages. (In Swedish)