A combined microbial and biogeochemical dataset from high-latitude ecosystems with respect to methane cycle

Maialen Barret , L. Gandois , Frederic Thalasso , Karla Martinez Cruz , Armando Sepulveda Jauregui , Céline Lavergne , Roman Teisserenc , Polette Aguilar , Oscar Gerardo Nieto , Claudia Etchebehere , Bruna Martins Dellagnezze , Patricia Bovio Winkler , Gilberto Fochesatto , Nikita Tananaev , Mette Svenning , Christophe Seppey , Alexander Tveit , Rolando Chamy , María Soledad Astorga España , Andrés Mansilla , Anton van de Putte , Maxime Sweetlove , Alison Murray , Léa Cabrol (1)

1 MIO - Institut méditerranéen d'océanologie

Abstract High latitudes are experiencing intense ecosystem changes with climate warming. The underlying methane (CH 4 ) cycling dynamics remain unresolved, despite its crucial climatic feedback. Atmospheric CH 4 emissions are heterogeneous, resulting from local geochemical drivers, global climatic factors, and microbial production/consumption balance. Holistic studies are mandatory to capture CH 4 cycling complexity. Here, we report a large set of integrated microbial and biogeochemical data from 387 samples, using a concerted sampling strategy and experimental protocols. The study followed international standards to ensure inter-comparisons of data amongst three high-latitude regions: Alaska, Siberia, and Patagonia. The dataset encompasses different representative environmental features (e.g. lake, wetland, tundra, forest soil) of these high-latitude sites and their respective heterogeneity (e.g. characteristic microtopographic patterns). The data included physicochemical parameters, greenhouse gas concentrations and emissions, organic matter characterization, trace elements and nutrients, isotopes, microbial quantification and composition. This dataset addresses the need for a robust physicochemical framework to conduct and contextualize future research on the interactions between climate change, biogeochemical cycles and microbial communities at high-latitudes.

Domaines: Sciences de l'environnement

Maialen Barret, L. Gandois, Frederic Thalasso, Karla Martinez Cruz, Armando Sepulveda Jauregui, et al.. A combined microbial and biogeochemical dataset from high-latitude ecosystems with respect to methane cycle. Scientific Data , 2022, 9 (1), pp.674. ⟨10.1038/s41597-022-01759-8⟩. ⟨hal-03993305v1⟩