Moss and underlying soil bacterial community structures are linked to moss functional traits

• Published in: Ecosphere
• Main Authors: Klarenberg, Ingeborg, J, Keuschnig, Christoph, Salazar, Alejandro, Benning, Liane, G, Vilhelmsson, Oddur
• Other Authors: University of Akureyi, University of Iceland Reykjavik, Vrije Universiteit Amsterdam Amsterdam (VU), Ampère, Département Bioingénierie (BioIng), Ampère (AMPERE), École Centrale de Lyon (ECL), Université de Lyon-Université de Lyon-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-École Centrale de Lyon (ECL), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Earth Surface Geochemistry Postdam, German Research Centre for Geosciences - Helmholtz-Centre Potsdam (GFZ), Agricultural University of Iceland, Free University of Berlin (FU), European Project: 675546,H2020,H2020-MSCA-ITN-2015,MicroArctic(2016)
• Format: Article in Journal/Newspaper
• Language: English
• Published: HAL CCSD 2023
• Subjects: moss bacterial communities; moss traits; nitrogen; nitrogen fixation; plant-soil-microbe interactions; primary succession; soil; soil bacterial communities; [SDE.BE]Environmental Sciences/Biodiversity and Ecology; [SDV.BV.BOT]Life Sciences [q-bio]/Vegetal Biology/Botanics; [SDV.EE.IEO]Life Sciences [q-bio]/Ecology; environment/Symbiosis; [SDV.MP.BAC]Life Sciences [q-bio]/Microbiology and Parasitology/Bacteriology; Arctic; glacier; Iceland
• Online Access: https://hal.science/hal-04629100; https://hal.science/hal-04629100/document; https://hal.science/hal-04629100/file/Ecosphere%20-%202023%20-%20Klarenberg%20-%20Moss%20and%20underlying%20soil%20bacterial%20community%20structures%20are%20linked%20to%20moss%20functional.pdf; https://doi.org/10.1002/ecs2.4447

International audience Mosses are among the first colonizing organisms after glacier retreat and can develop into thick moss mats during later successional stages. They are key players in N 2 fixation through their microbiome, which is an important process for nutrient buildup during primary succession. How these moss–microbe interactions develop during succession is not well studied and is relevant in the light of climate change and increased glacier retreat. We examined how the bacterial communities associated with two moss species of the genus Racomitrium and the underlying soil, as well as moss traits and nitrogen fixation, develop along a successional gradient in the glacier forefield of Fláajökull in southeast Iceland. In addition, we tested whether moss functional traits, such as total carbon (TC) and total nitrogen (TN) contents, moss moisture content, and moss shoot length are drivers of moss and underlying soil bacterial communities. Although time since deglaciation did not affect TN and moss moisture contents, TC and shoot length increased with time since deglaciation. Moss and underlying soil bacterial communities were distinct. While the soil bacterial community structure was driven by moss C/N ratios, the moss bacterial community structure was linked to time since deglaciation, moss C/N ratio, and moss moisture content. Moss N 2 ‐fixation rates were linked to bacterial community composition and nifH gene abundance rather than moss TN or time since deglaciation. This was accompanied by a shift from autotrophic to heterotrophic diazotrophs. Overall, our results suggest that there is little lateral transfer between moss and soil bacterial communities and that moss traits affect moss and soil bacterial community structure. Only moss bacterial community changed with time since deglaciation. In addition, moss N 2 ‐fixation rates are determined by bacterial community structure, rather than moss traits or time since deglaciation. This study on the interplay between succession, mosses, soils, and their ...