Líffræðifélag Íslands - biologia.is
Líffræðiráðstefnan 2025
Erindi/veggspjald / Talk/poster E109
Höfundar / Authors: Oddur Þór Vilhelmsson(1,2), Diana Vinchira-Villarraga(3), Ziyue Zeng(3), Robert W. Jackson(3), Nathan Chrismas(4), Auður Sigurbjörnsdóttir(1), Natalia Ramírez Carrera(5), Vilji Ragnarsson(1), Aldís Ósk Agnarsdóttir(1)
Starfsvettvangur / Affiliations: (1)Faculty of Natural Resource Science, University of Akureyri. Iceland. (2)The Biomedical Center of the University of Iceland, Reykjavík, Iceland. (3)Birmingham Institute of Forest Research, University of Birmingham, UK. (4)Royal Botanic Garden, Edinburgh, Scotland. (5)Department of Plant Protection Biology, Swedish University of Agricultural Sciences, Sweden.
Kynnir / Presenter: Oddur Þór Vilhelmsson
Dog lichens (Peltigera spp.) are characteristic of several Icelandic habitat types, including forestries, various heathlands, boreal snowbeds, and more. The ongoing rapid warming of the Arctic is likely to lead to shifts in vegetation coverage and composition, although the extent of such changes and effects on different species are as yet poorly understood. As symbiotic organisms, lichens may be fairly resilient to environmental changes due to the dynamism conferred by the interactions among the various microbes making up the lichen holobiont and its associated microbiome. Nevertheless, shifts may lead to outcompetition by faster-growing bryophytes and other plants. To what extent do habitat type and climate influence the composition and activities of lichen-associated microbiomes? Are the symbiotic partners likely to temper or exacerbate these shifts? Will a warming climate lead to decreased health of lichen holobionts? Will a warming climate affect specific microbiome functionalities? Attempting to shed light on these and similar questions, we set out to investigate the metabolomes and microbiomes of several Peltigera spp. in habitats ranging from NE-Iceland tundra to temperate rainforests in Cumbria, England. We‘ve analysed their microbiomes by amplicon-based metabarcoding, their metabolomes by LC-MS/MS, and isolated several key bacterial species with putative roles in auxiliary photosynthesis, nitrogen fixation, nutrient scavenging, and more.