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Staff photo Lars E Ericson

Lars E Ericson

I am interested in the reciprocal interaction between plants and their natural enemies, parasitic fungi and insect herbivores.

Works at

Affiliated as professor emeritus at Department of Ecology and Environmental Sciences
KB. H3, Linnaeus väg 6, Umeå, A3.38.15 Umeå universitet, 901 87 Umeå

I am interested in the interplay between plants and their natural enemies (parasitic fungi and herbivores) and how these interactions shape population dynamics and community structure. I have two main approaches (1) focused on spatio-temporal dynamics in rising archipelagos and (2) focused on the role of global change (increased nitrogen availability and temperature) in the boreal forest landscape.

A more recent interest is to understand the various factors that has resulted in the dramatic changes in species composition that has taken place in Bothnian archipelagos.

Spatio-temporal patterns in rising archipelagos
The work is conducted in a Bothnian archipelago, Skeppsviks archipelago, 30 km east of Umeå, subjected to isostatic rebound (85 cm/century). This archipelago has about 100 islands that vary in age from young incipient islands to those that are more than 1 000 yrs old. This ideally, and for some systems, represents a gradient of increasing temporal coexistence between host plants and their natural enemies, while other systems are more affected by species composition and abiotic factors. Our work addresses colonization and extinction processes of both host plants and their natural enemies and whether these interactions will result in reciprocal interactions between the involved organisms. The possible role of global change in affecting these interactions has received increasing attention in recent years.
The work in the archipelago was initiated in the early 70´s and has ever since 1990 been focused on the role of bi- and tritrophic interactions. We utilize both annual monitorings, and various field- and glasshouse experiments.
Examples of two important study systems are
Filipendula ulmaria – the rust fungus Triphragmium ulmariae – two chrysomelid beetles Galerucella tenella and Altica engstroemi.
Sedges, Carex spp. – their smut fungi Anthracoidea spp. – and the vector, the shiny beetle Phalacrus substriatus.

The boreal forest landscape
Most boreal plant communities are dominated by ericaceous dwarf-shrubs adapted to nutrient-limitation. These dwarf shrubs house a species-rich flora of parasitic fungi which play a key role in structuring these communities. Our work primarily addresses how these interactions are affected by increased nitrogen deposition, and whether this will result in vegetation shifts, but we also address the effects of increased temperature and changed snow package. I´m particularly interested in the role of various snowblight fungi.
This work was initiated in 1996 and we utilize long-term field experiments in nutrient poor forest and mire ecosystems in which we manipulate nitrogen availability, temperature and snow depth. The experiments are located in the Vindeln area, an area characterized by a low background deposition of nitrogen, which allow us to study initial vegetation responses of low doses.

Long-term change in Bothnian archipelagos
My interest in the flora of Bothnian archipelagos started in the late 60´s. The changes in species composition have been remarkable and I have been increasingly interested to try to understand the causes.

Research area
Terrestrial ecology

Research project
NCOE Tundra, Nordic Centre of Excellence

Environmental Science and Ecotechnology, Elsevier 2023, Vol. 13
Bidleman, Terry; Andersson, Agneta; Brorström-Lundén, Eva; et al.
Journal of Ecology, John Wiley & Sons 2022, Vol. 110, (1) : 173-184
Zhan, Jiasui; Ericson, Lars; González-Jiménez, Jose; et al.
Scientific Reports, Nature Publishing Group 2020, Vol. 10, (1)
Weber, Daniela; Egan, Paul A.; Muola, Anne; et al.
Environmental Science: Processes & Impacts, London: Royal Society of Chemistry 2019 : 881-892
Bidleman, Terry F.; Andersson, Agneta; Brugel, Sonia; et al.
Global Change Biology, John Wiley & Sons 2018, Vol. 24, (8) : 3526-3536
Zhan, Jiasui; Ericson, Lars; Burdon, Jeremy J.
Journal of Ecology, WILEY 2017, Vol. 105, (3) : 701-713
Ericson, Lars; Mueller, Warren J.; Burdon, Jeremy J.
Proceedings of the 5th International Symposium on Biological Control of Arthropods, CABI Publishing 2017 : 278-280
Weber, D.; Egan, P. A.; Ericson, Lars E.; et al.
Journal of Animal Ecology, Vol. 85, (6) : 1595-1604
Fors, Lisa; Markus, Robert; Theopold, Ulrich; et al.
Oecologia, Springer-Verlag New York 2016, Vol. 180, (4) : 1159-1171
Lehndal, Lina; Hambäck, Peter A; Ericson, Lars; et al.
Entomologia Experimentalis et Applicata, Wiley-Blackwell 2015, Vol. 157, (1) : 68-73
Stenberg, Johan A; Ericson, Lars
Encyclopedia of agriculture and food systems: volume 3, San Diego: Academic Press 2014 : 59-67
Burdon, J.J.; Ericson, Lars E.; Thrall, P.H.
Current opinion in plant biology, Vol. 16, (4) : 400-405
Burdon, Jeremy J.; Thrall, Peter H.; Ericson, Lars
BMC Evolutionary Biology, Vol. 13 : 92-
Hamback, Peter A.; Weingartner, Elisabet; Ericson, Lars; et al.
Philosophical Transactions of the Royal Society of London. Biological Sciences, Vol. 368, (1624)
Olofsson, Johan; te Beest, Mariska; Ericson, Lars
Forest Ecology and Management, Elsevier 2012, Vol. 286 : 108-120
Olsson, Jörgen; Johansson, Therese; Jonsson, Bengt Gunnar; et al.
Nature Climate Change, Vol. 1 : 220-223
Olofsson, Johan; Ericson, Lars; Torp, Mikaela; et al.
Biological Conservation, Elsevier 2011, Vol. 144, (3) : 1100-1110
Olsson, Jörgen; Jonsson, Bengt Gunnar; Hjältén, Joakim; et al.
Journal of Ecology, Vol. 99 : 634-641
Smith, DL; Ericson, Lars; Burdon, JJ
Journal of Ecology, Vol. 98, (2) : 470-479
Saona, Nora M; Albrectsen, Benedicte R.; Ericson, Lars E; et al.
Encyclopedia of Microbiology, Oxford: Elsevier 2009 : 647-654
Burdon , JJ; Thrall , PH; Ericson , Lars
Encyclopedia of Islands, University of California Press 2009 : 748-752
Carlsson-Granér, Ulla; Ericson, Lars; Giles, Barbara E.
Ecosystems (New York. Print), Vol. 12 : 1204-1211
Nordin, A; Strengbom, J; Forsum, Å; et al.
New Phytologist, John Wiley & Sons 2009, Vol. 183, (3) : 667-677
Riba, Miquel; Mayol, Maria; Giles, Barbara E.; et al.
Proceedings of the Royal Society of London. Biological Sciences, Vol. 276, (1669) : 2913-2922
Van der Merwe, MM; Kinnear, MW; Barrett, LG; et al.
New Phytologist, Vol. 181, (1) : 208-217
Wiedermann, Magdalena M; Gunnarsson, Urban; Ericson, Lars; et al.
Oikos, Vol. 118, (3) : 449-456
Wiedermann, Magdalena M; Gunnarsson, Urban; Nilsson, Mats B.; et al.
Oikos, Wiley-Blackwell 2008, Vol. 117 : 473-480
Albrectsen, Benedicte R.; Ericson, Lars; Lundberg, Per
Chemoecology, Vol. 18, (4) : 263-
Hjalten , J.; Lindau , A.; Wennstrom , Anders; et al.
Chemoecology, Vol. 180, (4) : 227-231
Hjälten, J.; Lindau, A.; Wennström, Anders; et al.
Fungal Diversity, Vol. 30 : 73-81
Kruys, Åsa; Ericson, Lars
Ecology, Ecological Society of America (ESA) 2008, Vol. 89, (1) : 126-133
Stenberg, Johan A.; Hambäck, Peter A.; Ericson, Lars
Mycological Research, Vol. 112, (Pt 12) : 1387-408
van der Merwe, Marlien M; Walker, John; Ericson, Lars; et al.
Biological Conservation, Vol. 135, (3) : 380-387
Hedenås, Henrik; Blomberg, Patrik; Ericson, Lars
Basic and Applied Ecology, Vol. 8, (3) : 434-443
Hjältén, Joakim; Lindau, Anna; Wennström, Anders; et al.
Oikos, Wiley-Blackwell 2007, Vol. 116, (5) : 751-758
Hjältén, Joakim; Niemi, Lena; Wennström, Anders; et al.
Oikos, Vol. 116, (9) : 1501-1513
Rammul, Üllar; Oksanen, Tarja; Oksanen, Lauri; et al.
Entomologia Experimentalis et Applicata, Vol. 125, (1) : 81-88
Stenberg, Johan A.; Ericson, Lars
Oikos, Vol. 116, (3) : 482-490
Stenberg, Johan A.; Heijari, Juha; Holopainen, Jarmo K.; et al.
Mycological Research, Vol. 111 : 163-175
Van der Merwe, M; Ericson, Lars; Walker, J; et al.
Ecology, Vol. 88, (2) : 454-464
Wiedermann, Magdalena M.; Nordin, Annika; Gunnarsson, Urban; et al.
Annual Review of Phytopathology, Annual Reviews 2006, Vol. 44 : 19-39
Burdon, Jeremy J.; Thrall, Peter H.; Ericson, Lars
Forest Ecology and Management, Vol. 232 : 12-18
Edman, M; Moller, R; Ericson, Lars
Journal of Vegetation Science, Vol. 17 : 207-216
Hedenås, Henrik; Lundin, K; Ericson, Lars
Forest Ecology and Management, Vol. 237, (1-3) : 335-341
Johansson, Therese; Olsson, Jörgen; Hjältén, Joakim; et al.
Environmental Pollution, Vol. 141, (1) : 167-174
Nordin, A; Strengbom, J; Ericson, L
Oecologia, Vol. 148, (3) : 414-425
Stenberg, Johan A; Witzell, Johanna; Ericson, Lars

Research projects