Líffræðifélag Íslands - biologia.is
Líffræðiráðstefnan 2025
Erindi/veggspjald / Talk/poster E97
Höfundar / Authors: Bastien Papinot-Lecomte (1), Snæbjörn Pálsson (1), Oddur Þór Vilhelmsson (2), Ingibjörg Svala Jónsdóttir (1)
Starfsvettvangur / Affiliations: 1. University of Iceland; 2. University of Akureyri
Kynnir / Presenter: Bastien Papinot-Lecomte
The moss layer hosts a surprising number of species, ranging from the tiniest bacteria and fungi to larger protists and metazoans, such as spiders. These diverse species comprise the bryosphere and participate in a network of interactions that shapes ecosystem processes. Identifying the most abundant trophic groups in each segment of the moss layer will elucidate the main roles of the bryosphere and its inhabitants play in the different processes occuring in fragile ecosystems such as the Icelandic tundra. By assigning trophic levels to all identified organisms in two different Icelandic locations, each being subject to a long-term sheep exclosure setup, we aimed to understand what factors impact the trophic group repartition in the moss layer, both at the scale of different moss segments of a same shoot and by comparing different locations, both mostly covered by the woolly-fringe moss Racomitrium lanuginosum. Finally, we aim to understand the relationships between environmental factors such as temperature, moisture, and C/N ratio of the moss shoots on trophic network composition on the one hand, and on the other, what trophic groups are directly involved in ecosystem processes like litter decomposition. By assigning this functionality to all identified organisms within the bryophyte layer, we continue to improve our understanding of the diversity and role of the bryosphere in the functioning of such ecosystems.