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Souza, Felipe F.C.; Mathai, Prince P.; Pauliquevis, Theotonio; Balsanelli, Eduardo; Pedrosa, Fabio O.; Souza, Emanuel M.; Baura, Valter A.; Monteiro, Rose A.; Cruz, Leonardo M.; Souza, Rodrigo A.F.; Andreae, Meinrat O.; Barbosa, Cybelli G.G.; de Angelis, Isabella Hrabe; Sánchez-Parra, Beatriz; Pӧhlker, Christopher; Weber, Bettina; Ruff, Emil; Reis, Rodrigo A.; Godoi, Ricardo H.M.; Sadowsky, Michael J.; Huergo, Luciano F.
The Science of the total environment, 03/2021, Letnik: 760Journal Article
The Amazon rainforest is the world's largest tropical forest, and this biome may be a significant contributor to primary biological aerosol (PBA) emissions on a global scale. These aerosols also play a pivotal role in modulating ecosystem dynamics, dispersing biological material over geographic barriers and influencing climate through radiation absorption, light scattering, or acting as cloud condensation nuclei. Despite their importance, there are limited studies investigating the effect of environmental variables on the bioaerosol composition in the Amazon rainforest. Here we present a 16S rRNA gene-based amplicon sequencing approach to investigate the bacterial microbiome in aerosols of the Amazon rainforest during distinct seasons and at different heights above the ground. Our data revealed that seasonal changes in temperature, relative humidity, and precipitation are the primary drivers of compositional changes in the Amazon rainforest aerosol microbiome. Interestingly, no significant differences were observed in the bacterial community composition of aerosols collected at ground and canopy levels. The core airborne bacterial families present in Amazon aerosol were Enterobacteriaceae, Beijerinckiaceae, Polyangiaceae, Bacillaceae and Ktedonobacteraceae. By correlating the bacterial taxa identified in the aerosol with literature data, we speculate that the phyllosphere may be one possible source of airborne bacteria in the Amazon rainforest. Results of this study indicate that the aerosol microbiota of the Amazon Rainforest are fairly diverse and principally impacted by seasonal changes in temperature and humidity. Display omitted •The Amazon aerosol microbiome was studied during distinct seasons and heights.•Seasons had a major impact on the Amazon aerosol microbiome.•Humidity and temperature were main drivers of Bacterial taxa present in the Amazon aerosol.•Airborne bacterial taxa were not directly related to those present in soil.
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