Published results from the ForHot project

Here we will put all main publications (research articles, reports, papers in conference proceedings, Powerpoint talks, theses, newspaper articles, etc.)

Expected soon

Jing Zhang, Alf Ekblad, Bjarni D. Sigurðsson, Håkan Wallander (2020). The influence of soil warming on organic carbon sequestration of arbuscular mycorrhizal fungi in a sub-Arctic grassland. Soil Biology and Biochemistry (in press).

ALREADY PUBLISHED/ACCEPTED

2020

JOURNAL PAPER: Christopher Poeplau, Pall Sigurdsson, Bjarni D Sigurdsson (2020). Strong warming of a subarctic Andosol depleted soil carbon and aggregation under forest and grassland cover. Soil  6, 115–129 https://doi.org/10.5194/soil-6-115-2020

JOURNAL PAPER: Dmitry Kutcherov, Stine Slotsbo, Bjarni D. Sigurdsson, Niki I. W. Leblans, Matty P. Berg, Jacintha Ellers, Janine Mariën, and Martin Holmstrup (2020). Temperature responses in a subarctic springtail from two geothermally warmed habitats. Pedobiologia – Journal of Soil Ecology 78,150606. https://doi.org/10.1016/j.pedobi.2019.150606.

JOURNAL PAPER: De Gruyter, Johan; Weedon, James; bazot, Stéphane; Dauwe, Steven; Roc, Pere; Geisen, Stefan; Gourlez De La Motte, Louis; Heinesch, Bernard; Janssens, Ivan; Leblans, Niki; Manise, Tanguy; Ogaya, Roma; Ottosson Lofvenius, Mikaell; Penuelas, Josep; Sigurdsson, Bjarni; Vincent, Gaelle; Verbruggen, Erik. (2020) Patterns of local, intercontinental and inter-seasonal variation of soil bacterial and eukaryotic microbial communities. FEMS Microbiology Ecology 96, fiaa018. https://doi.org/10.1093/femsec/fiaa018

JOURNAL PAPER: Tom W. N. Walker, Ivan A. Janssens, Bjarni D. Sigurdsson, Andreas Richter, Josep Peñuelas, Niki I. W. Leblans, Michael Bahn, Mireia Bartrons, Cindy De Jonge, Lucia Fuchslueger, Albert Gargallo-Garigga, Gunnhildur E. G. Gunnarsdottir, Sara Marañón-Jiménez, Edda S. Oddsdóttir, Ivika Ostonen, Christopher Poeplau, Judith Prommer, Dajana Radujkovic, Jordi Sardans, Páll Sigurðsson, Jenny Soong, Sara Vicca, Hakan Wallander, James T. Weedon & Erik Verbruggen (2020). A systemic decadal-scale overreaction to soil warming in a grassland ecosystem. Nature Ecology and Evolution 4: 101-108. https://doi.org/10.1038/s41559-019-1055-3

CONFERENCE ABSTRACT: Andrea Söllinger, Craig W. Herbold, Petra Pjevac, Joana Silva, Mathilde Borg Dahl, Bjarni D. Sigurdsson, Tim Urich, Ivan Janssens, Andreas Richter, Alexander T. Tveit (2020). LONG-TERM WARMING LED TO SOIL CARBON LOSS AND MICROBIAL ACCLIMATION IN ICELANDIC GRASSLANDS. Given at: “Nature conference: A changing Arctic”, Tromsø, Norway, 2nd-5th of June, 2020.

CONFERENCE ABSTRACT: Kathiravan Meeran, Niel Verbrigghe, Lucia Fuchslueger, Johannes Ingrisch, Sara Vicca, Jennifer Soong, Lena Müller, Bjarni D. Sigurdsson, Ivan Janssens, and Michael Bahn (2020). Effect of soil warming and N availability on the fate of recent carbon in subarctic grassland. Geophysical Research Abstracts EGU2020-15445

CONFERENCE ABSTRACT: Moritz Mohrlok et al. (2020). The influence of short-term and long-term warming on physical soil carbon pools. Geophysical Research Abstracts EGU2020-18383

2019

REPORT: Páll Sigurðsson, Edda S. Oddsdóttir, Ivika Ostonen and Bjarni D. Sigurðsson (2019). FORHOT-FOREST. Final Report – 1.2 Research Overview. Rannsóknasjóður, Unpubhlished report sent to Icelandic Research Council.

JOURNAL PAPER: Maljanen, Heli Yli-Moijala, Bjarni D. Sigurdsson, and Christina Biasi (2019/2020). Abiotic CO2 sources confound interpretation of temperature responses of in situ respiration in geothermally warmed forest soils of Iceland. Biogeoscinces Discussions (in press for Biogeosciences in 2020)

https://doi.org/10.5194/bg-2019-213

JOURNAL PAPER: Cindy De Jonge, Dajana Radujković, Bjarni D Sigurdsson, James T. Weedon, Ivan Janssens, Francien Peterse (2019) Lipid biomarker temperature proxy responds to abrupt shift in the bacterial community composition in geothermally heated soils. Organic Geochemistry 137, 103897.

https://doi.org/10.1016/j.orggeochem.2019.07.006

JOURNAL PAPER: Christopher Poeplau, Pierre Barre, Lauric Cecillion, Francois Baudin, Bjarni D. Sigurdsson (2019). Changes in the Rock-Eval signature of soil organic carbon upon extreme soil warming and chemical oxidation – A comparison. Geoderma 337: 181-190.

https://doi.org/10.1016/j.geoderma.2018.09.025

JOURNAL PAPER: Sara Marañón-Jiménez, Josep Peñuelas, Andreas Richter, Bjarni D Sigurdsson, Lucia Fuchslueger, Niki N. I. Leblans, Ivan A Janssens (2019). Coupled
carbon and nitrogen losses in response to seven years of chronic warming in subarctic soils. Soil Biology and Biochemistry 134: 152-161.

https://doi.org/10.1016/j.soilbio.2019.03.028

JOURNAL PAPER: Nicholas Rosenstock, Magnus Ellström, Edda Oddsdottir, Bjarni D Sigurdsson & Håkan Wallander (2019). Carbon sequestration and community composition of ectomycorrhizal fungi across a geothermal warming gradient in an Icelandic spruce forest. Fungal Ecology 40: 32-42.

https://doi.org/10.1016/j.funeco.2018.05.010

JOURNAL PAPER: Kaarin Parts, Leho Tedersoo, Andreas Schindlbacher, Bjarni D. Sigurdsson, Niki Leblans, Edda Oddsdottir, Werner Borken, Ivika Ostonen (2019) Acclimation of fine root systems to soil warming: comparison of an experimental setup and a natural soil temperature gradient. Ecosystsems 22(3): 457-472.

https://doi.org/10.1007/s10021-018-0280-y

2018

JOURNAL PAPER: Tom W. N. Walker, Christina Kaiser, Florian Strasser, Niki I. W. Leblans, Dagmar Woebken, Ivan A. Janssens, Bjarni D. Sigurdsson & Andreas Richter (2018). Microbial temperature sensitivity and biomass change explain soil carbon loss with warming. Nature Climate Change 8: 885-889.

https://doi.org/10.1038/s41558-018-0259-x

JOURNAL PAPER: Marañón-Jiménez S., Soong J.L., Leblans N.I.W., Sigurdsson B.D., Peñuelas J., Richter, A., Asensio D., Fransen E., Janssens I.A. (2018). Geothermally warmed soils reveal persistent increases in the respiratory costs of soil microbes contributing to substantial C losses. Biogeochemistry 138: 245–260.

https://doi.org/10.1007/s10533-018-0443-0

JOURNAL PAPER: Martin Holmstrup, Bodil K. Ehlers, Stine Slotsbo, Krassimira Ilieva-Makulec, Bjarni D. Sigurdsson, Niki Leblans, Jacintha Ellers and Matty Berg (2018). Functional diversity of Collembola is reduced in soils subjected to short‐term, but not long‐term, geothermal warming. Functional Ecology 32(5): 1304-1316.

https://doi.org/10.1111/1365-2435.13058

JOURNAL PAPER: Radujković, Dajana, Erik Verbruggen, Bjarni D. Sigurdsson, Niki I. W. Leblans, Ivan Janssens, Steven Dauwe, Sara Vicca, James T. Weedon (2018). Prolonged exposure does not increase soil microbial community response to warming along geothermal gradients. FEMS Microbiology Ecology 94(2): fix174.

https://doi.org/10.1093/femsec/fix174

JOURNAL PAPER: Marja Maljanen, Hem Raj Bhattarai, Christina Biasi & Bjarni D. Sigurdsson (2018). The potential effect of elevated soil temperatures on the production of carbon dioxide (CO2), methane (CH4), nitrous oxide (N2O), nitric oxide (NO) and nitrous acid (HONO) from volcanic soils in southern Iceland. Icelandic Agricultural Sciences 31: 11-22.

https://doi.org/10.16886/IAS.2018.02

THESIS: Lena M. Müller (2019). Title? M.Sc. thesis. University of Innsbruck, Austria

2017

JOURNAL PAPER: Leblans, Niki, Bjarni D Sigurdsson, Sara Vicca, Yongshuo Fu, Josep Penuelas, Ivan Janssens (2017). Phenological responses of Icelandic subarctic grasslands to short-term and long-term natural soil warming. Global Change Biology 23(11), 4932-4945. doi: 10.1111/gcb.13749.

JOURNAL PAPER: Gargallo-Garriga, Albert, Marta Ayala-Roque, Jordi Sardans, Mireia Bartrons, Bjarni D. Sigurdsson, Niki Leblans, Michal Oravec, Otmar Urban, Josep Peñuelas. (2017). Impact of soil warming on the plant metabolome of Icelandic grasslands. Metabolites 7(3), 44; doi:10.3390/metabo7030044

JOURNAL PAPER: Maljanen, M., Yli-Moijala, H., Biasi, C., Leblans, N. I. W., De Boeck, H. J., Bjarnadóttir, B., et al. (2017). The emissions of N2O and CH4 from natural soil temperature gradients in a volcanic area in southwest Iceland. Soil Biology and Biochemistry 109: 70-80. doi: 10.1016/j.soilbio.2017.01.021

JOURNAL PAPER: Poeplau, Christopher, Kätterer, Thomas, Leblans, Niki I. W., & Sigurdsson, Bjarni D. (2017). Sensitivity of soil carbon fractions and their specific stabilisation mechanisms to extreme soil warming in a subarctic grassland. Global Change Biology 23: 1316-1327, doi: 10.1111/gcb.13491.

THESIS: Stephanie Van Loock. (2017). Short-trem and long-term changes in vegetation and biomass in response to natural soil warming and nitrogen availability in a subarctic grassland. (M.Sc. thesis). Defended on 3rd of February 2017. Faculty of Science, Department of Biology, Unviersity of Antwerp, Belgium. 49 p.

THESIS: Nia Sigrun Perron. (2017). Warming responses of two native Icelandic species, Ranunculus acris and Thymus praecox ssp. arcticus in geothermal areas. (M.Sc. thesis). Defended in June 2017. Faculty of Life and Environmental Sciences, School of Engineering and Natural Sciences, University of Iceland, Reykjavik, Iceland. 51 p.

REPORT: Julia Bischof. (2017). PLANUNG UND ANLAGE EINER DAUERVERSUCHSFLÄCHE zur Beprobung der Hitzetoleranz von Wurzeln sommergrüner Gehölzpflanzen im Vergleich zur Sitka-Fichte (Picea stichensis). An internship report done for the Hochschule Weihenstephan-Triesdorf. 11 p.

REPORT: Paige Guevarra. (2017). Effect of geothermal soil warming on needle morphology of Picea sitchensis in southwest Iceland.A report done for the School for International Training: Iceland and Greenland Climate Change and the Arctic Spring 2017. 22 p.

REPORT: Nia Perron. (2017). Warming responses of native plants, Ranunculus acris and Thymus  praecox  ssp.  arcticus  in geothermal  areas, Iceland. A STSM report done for the COST ES1308 ClimMani project. 8 p.

CONFERENCE ABSTRACT: Sara Marañón-Jiménez, Jenniffer L. Soong, Niki I. W. Leblans, Bjarni D. Sigurdsson, Steven Dauwe, Erik Fransen, and Ivan A. Janssens (2017). Soil warming increases metabolic quotients of soil microorganisms without changes in temperature sensitivity of soil respiration. Geophysical Research Abstracts Vol. 19, EGU2017-16746, 2017 EGU General Assemply 2017.

2016

JOURNAL PAPER: Sigurdsson, B.D., N.I.W. Leblans, S. Dauwe, E. Guðmundsdóttir, P. Gundersen, G.E. Gunnarsdóttir, M. Holmstrup, K. Ilieva-Makulec, T. Kätterer, B. Marteinsdóttir, M. Maljanen, E.S. Oddsdóttir, I. Ostonen, J. Peñuelas, C. Poeplau, A. Richter, P. Sigurðsson, P.M. Van Bodegom, H. Wallander, J. Weedon and I. Janssens (2016). Geothermal ecosystems as natural climate change experiments: the ForHot research site in Iceland as a case study. Icelandic Agricultural Sciences 29:53-71, doi: 10.16886/IAS.2016.05

THESIS: Leblans, Niki I. W. (2016). Natural gradients in temperature and nitrogen: Iceland represents a unique environment to clarify longterm global change effects on carbon dynamics. Joint PhD thesis between Agricultural University of Iceland and University of Antwerp. Defended on Novemer 14, 2016, Agric. Univ. Iceland, Reykjavik, Iceland.

THESIS: Roque, Marta Ayala. (2016). Impact of soil warming on the plant metabolome of Icelandic grassland.(M.Sc. thesis), Master in Industrial Chemistry and Introduction to Chemical Research). UAB – Universitat Autonoma de Barcelona, Barcelona, Spain.

THESIS: Edlinger, Anna Theresa. (2016). Changes of belowground processes of the carbon and nitrogen cycle in response to soil warming. Will global warming increase the turnover of soil C and N above plant demands and lead to increased leaching losses (M.Sc. thesis), Copenhagen University, Denmark & University of Natural Resources and Applied Sciences (BOKU), Austria. Defended on September 4, 2016, Univ. Copenhagen, Copenhagen, Denmark.

THESIS: Dajana Radujkovic. (2016). Structure of soil microbial communities along a geothermal gradient in Iceland. (M.Sc. thesis). Defended in June 2016. Faculty of Science, Department of Biology, Unviersity of Antwerp, Belgium.

REPORT: Martin Maddison (2016). A STSM report to ES1308 COST ClimMani about his N2 incubation measuerments on samples from FN, GN and GO (in English)

REPORT: Jakob Wayne Víkingur Robertson, Lorenz Julian Brunnert and Sólrún Þórðardóttir(2016). What effect does soil temperature have on soil organic matter and vegetation density and diversity in a forest ecosystem?, Agricultural University of Iceland, October 5th 2016. 15 p.

TALK & ABSTRACTAndreas Richter (2016). Long-term versus short-term warming effects on microbial processes and soil organic matter storage. Co-authors: Tom Walker, Christina Kaiser, Florian Strasser, Dagmar Wöbken, Niki I. W. Leblans & Bjarni D. Sigurdsson. Given at a workshop etitled “SOMmic – Microbial Contribution and Impact on Soil Organic Matter, Structure and Genesis“, Leipzig, Germany, November 9-11, 2016.

TALK & ABSTRACT: Tom Walker, Niki Leblans, Bjarni D. Sigurdsson, and Andreas Richter(2006). Long-term versus short-term warming effects on microbial processes. Geophysical Research Abstracts Vol. 18, EGU2016-12277-2, 2016 EGU General Assemply 2016.

TALK & ABSTRACT: Christopher Poeplau, Niki I. W. Leblans, Bjarni D. Sigurdsson, and Thomas Kätterer (2006). Quantitative and qualitative responses of soil organic carbon to six years of extreme soil warming in a subarctic grassland in Iceland. Geophysical Research Abstracts Vol. 18, EGU2016-2394, 2016 EGU General Assembly 2016.

TALK & ABSTRACT: Marja Maljanen, Heli Yli-Moijala, Niki I. W. Leblans, Hans J. De Boeck, Brynhildur Bjarnadóttir, and Bjarni D. Sigurdsson (2016). The emissions and soil concentrations of N2O and CH4 from natural soil temperature gradients in a volcanic area in southwest Iceland. Geophysical Research Abstracts Vol. 18, EGU2016-6668, 2016 EGU General Assembly 2016.

2015

POSTER: Sigurdsson, B.D., Oddsdottir, E.S., Ragnarsdóttir, T., Bjarnadottir, B., Ostonen, I., Ilieva-Makulec, K., Körner, C., Leblans, N., Dauwe, S., Janssens, I. (2015). The ForHot experiment: Effects of natural soil warming gradients on ecosystem structure and function. Given at the “CAR-ES Conference: Managing Forests to Promote Environmental Services”, Copenhagen University, Copenhagen, Denmark, 3-5 November, 2015.

POSTER: Niki Leblans, Bjarni D. Sigurdsson and Ivan Janssens (2015). Short- and long-term natural soil warming in natural grasslands in Iceland. Given at the “CAR-ES Conference: Managing Forests to Promote Environmental Services”, Copenhagen University, Copenhagen, Denmark, 3-5 November, 2015.

POSTER: Steven Dauwe, Bjarni D. Sigurdsson and Ivan Janssens (2015). Impact of soil warming and N enrichment on ecosystem structure and function in Icelandic grasslands. Given at the “CAR-ES Conference: Managing Forests to Promote Environmental Services”, Copenhagen University, Copenhagen, Denmark, 3-5 November, 2015.

POSTER: Niki Leblans, Bjarni D. Sigurdsson and Ivan Janssens (2015). Short- and long-term natural soil warming in natural grasslands in Iceland. Given at “The Biannual Biological Conference”, Askja, Reykjavik, 5-7 November 2015.

2014
REPORT: Gundersen (ed.), P., Ginzburg, S. O., Vesterdal, L., Bárcena, T. G., Sigurdsson, B. D., Stefansdottir, H. M., . . . Lazdiņa, D. (2014). Forest soil carbon sink in the Nordic region (pp. 37): Department of Geosciences and Natural Resource Management, University of Copenhagen, Frederiksberg.

JOURNAL PAPER: O’Gorman, E., Benstead, J. P., Cross, W. F., Friberg, N., Hood, J. M., Johnson, P. W., Sigurdsson, B. D., and Woodward, G. (2014) Climate change and geothermal ecosystems: natural laboratories, sentinel systems, and future refugia, Global Change Biology, 20, 3291–3299, doi:10.1111/gcb.12602.

CONFERENCE PAPER: Sigurdsson, B. D., Leblans, N., Oddsdottir, E. S., Maljanen, M., and Janssens, I. A. (2014). Effects of geothermal soil warming on soil carbon and nutrient processes in a Sitka spruce plantation, Working Papers of the Finnish Forest Research Institute, 316, 11-13.

CONFERENCE PAPER: Elín Guðmundsdóttir, Úlfur Óskrasson, Ásrún Elmarsdóttir (2014). Áhrif af hlýnun jarðvegs á gróðurfar í skóglendi og graslendi á Reykjum, Ölfusi [Effects of soil warming on vascular- and non-vascular plant communities in grasslands and forests at Reykir, Ölfus]. Rit Mógilsár, 31/2014, 73-80 (In Icelandic).

THESIS: Damiano Cilio (2014). Influenza di un gradiente geotermico di recente comparsa su un imboschimento di Picea sitchensis.Il singolare caso di Reykir, Islanda[Effects of soil warming on growth phenology and litter fall of Sitka spruce]. BSc thesis, Department of Biology, University of Florence, Italy

THESIS: Lieven Michielsen (2014). Plant communities and global change: adaptation by changes in present species composition or adaptation in plant traits. A case study in Iceland., M.Sc. thesis, Department of Biology, University of Antwerp, Antwerp, Belgium.

THESIS: Katherine Vande Velde (2014). Effects of short-term and long-term natural soil warming gradients on plant productivity, carbon and nitrogen stocks of a sub-arctic grassland, M.Sc. thesis, Dept. of Biology, Universtiy of Antwerp, Antwerp, Belgium, 104 pp.

THESIS: Hanna André and Agnes Bondesson (2014). Hur en ökad marktemperatur påverkar fotosyntes och markrespiration i en boreal skog [How increased soil temperature affects photosynthesis and soil respiration in a boreal forest], Candidate thesis, Institutionen för mark och miljö, Swedish University of Agricultural Sciences, Uppsala, Sweden, 51 pp (in Swedish, English summary).

POSTER: Edda S. Oddsdottir, Marja Maljanen, Joonas Maljanen and Bjarni D. Sigurdsson, (2014). Organic matter decomposition in a Sitka spruce forest under natural soil warming gradient in Iceland. Given at: 1st ClimMani COST Action Workshop: “Integrating climate change experiments, data synthesis and modelling”, 12-14 November 2014, University of Aveiro, Aveiro, Portugal.

POSTER: Krassimira Ilieva–Makulec and Bjarni D. Sigurdsson (2014). Nematode abundance along a natural soil warming gradient. Given at: 1st ClimMani COST Action Workshop: “Integrating climate change experiments, data synthesis and modelling”, 12-14 November 2014, University of Aveiro, Aveiro, Portugal.

POSTER: Bjarni D. Sigurdsson, Edda S. Oddsdottir, Theodóra Ragnarsdóttir, Brynhildur Bjarnadottir, Ivika Ostonen, Krassimira Ilieva–Makulec, Christian Körner, Niki Leblans, Steven Dauwe and Ivan A. Janssens (2014). The ForHot experiment: Effects of natural soil warming gradients on ecosystem structure and function. Given at: 1st ClimMani COST Action Workshop: “Integrating climate change experiments, data synthesis and modelling”, 12-14 November 2014, University of Aveiro, Aveiro, Portugal.

TALK: Damiano Cilio (2014). A talk entitled “Influenza di un gradiente geotermico di recente comparsa su un imboschimento di Picea sitchensis.Il singolare caso di Reykir, Islanda” given at the University of Florence, Italy (in Italian).

TALK: Bjarni D. Sigurdsson et al. (2014). A talk entitled “Effects of large natural soil warming gradients on potential decomposition rate and nutrient availability in a mature spruce forest” given at the conference “The Forest Soil Carbon Sink in the Northern Europe”. Dragør Badehotel, Dragør, Denmark, 8-9 May 2014 (in English).

TALK: Parts, K., Tedersoo, L., Lõhmus, K., Kupper, P., Rosenvald, K., Schindlbacher, A., Sigurdsson, B. D., Sõber, A., and Ostonen, I. (2014). Tree roots adapt to climate change – Experiments with air humidity and soil temperature. 6th International Symbosium on Physiological Processes in Roots of Woody Plants, Nagoya, Japan, 8th – 13th September 2014.

2013
TALK: Edda S. Oddsdottir et al. (2013). A talk entitled “The effects of elevated soil temperatures on ectomycorrhizal community and litter decomposition in a Sitka spruce forest in southern Iceland” given at the Biological Conference, Reykjavik, 8-9 November 2013 (in English).

TALK: Elin Gudmundsdottir (2013)A talk about her on-going MS study on the effect of soil warming on plant communities. Given at an open seminar at the Agric. Univ. of Iceland, 17 October 2013 (in Icelandic).

REPORT: Krassimira Ilieva-Makulec (2013). A final report to European Science Foundation (in English)

2012
REPORT: James Weedon (2012). A final report to European Science Foundation (in English)

TALK: Marja Maljanen (2012). A introductionary talk about the unpublished N2O and CH4 mesurements done within the ForHot project given at departamental seminar at Univ. of Eastern Finland. (in English)

REPORT: Armando Lenz (2012). A final report to European Science Foundation (in English)

2011
THESIS: Ella Thoen (2011). ECM fungi along a geothermal temperature elevation gradient in a Picea sitchensis forest stand in Iceland. Unpublished graduate thesis. Supervisors: Kesara Anamthawat-Jónsson and Edda S. Oddsdóttir. Faculty of Life and Environmental Sciences, University of Iceland, Reykjavik, Iceland. 31 p. (in English)

TALK: Bjarni D. Sigurdsson (2011). A introductionary talk about the ForHot project given at the FSC Sink annual meeting in Copenhagen. (in English)