Microbial impact on initial soil formation in arid and semiarid environments under simulated climate change
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Microbial impact on initial soil formation in arid and semiarid environments under simulated climate change. / Rodríguez, Victoria; Bartholomäus, Alexander; Witzgall, Kristina; Riveras-Muñoz, Nicolás; Oses, Romulo; Liebner, Susanne; Kallmeyer, Jens; Rach, Oliver; Mueller, Carsten W.; Seguel, Oscar; Scholten, Thomas; Wagner, Dirk.
In: Frontiers in Microbiology, Vol. 15, 1319997, 2024.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - Microbial impact on initial soil formation in arid and semiarid environments under simulated climate change
AU - Rodríguez, Victoria
AU - Bartholomäus, Alexander
AU - Witzgall, Kristina
AU - Riveras-Muñoz, Nicolás
AU - Oses, Romulo
AU - Liebner, Susanne
AU - Kallmeyer, Jens
AU - Rach, Oliver
AU - Mueller, Carsten W.
AU - Seguel, Oscar
AU - Scholten, Thomas
AU - Wagner, Dirk
N1 - Publisher Copyright: Copyright © 2024 Rodríguez, Bartholomäus, Witzgall, Riveras-Muñoz, Oses, Liebner, Kallmeyer, Rach, Mueller, Seguel, Scholten and Wagner.
PY - 2024
Y1 - 2024
N2 - The microbiota is attributed to be important for initial soil formation under extreme climate conditions, but experimental evidence for its relevance is scarce. To fill this gap, we investigated the impact of in situ microbial communities and their interrelationship with biocrust and plants compared to abiotic controls on soil formation in initial arid and semiarid soils. Additionally, we assessed the response of bacterial communities to climate change. Topsoil and subsoil samples from arid and semiarid sites in the Chilean Coastal Cordillera were incubated for 16 weeks under diurnal temperature and moisture variations to simulate humid climate conditions as part of a climate change scenario. Our findings indicate that microorganism-plant interaction intensified aggregate formation and stabilized soil structure, facilitating initial soil formation. Interestingly, microorganisms alone or in conjunction with biocrust showed no discernible patterns compared to abiotic controls, potentially due to water-masking effects. Arid soils displayed reduced bacterial diversity and developed a new community structure dominated by Proteobacteria, Actinobacteriota, and Planctomycetota, while semiarid soils maintained a consistently dominant community of Acidobacteriota and Proteobacteria. This highlighted a sensitive and specialized bacterial community in arid soils, while semiarid soils exhibited a more complex and stable community. We conclude that microorganism-plant interaction has measurable impacts on initial soil formation in arid and semiarid regions on short time scales under climate change. Additionally, we propose that soil and climate legacies are decisive for the present soil microbial community structure and interactions, future soil development, and microbial responses.
AB - The microbiota is attributed to be important for initial soil formation under extreme climate conditions, but experimental evidence for its relevance is scarce. To fill this gap, we investigated the impact of in situ microbial communities and their interrelationship with biocrust and plants compared to abiotic controls on soil formation in initial arid and semiarid soils. Additionally, we assessed the response of bacterial communities to climate change. Topsoil and subsoil samples from arid and semiarid sites in the Chilean Coastal Cordillera were incubated for 16 weeks under diurnal temperature and moisture variations to simulate humid climate conditions as part of a climate change scenario. Our findings indicate that microorganism-plant interaction intensified aggregate formation and stabilized soil structure, facilitating initial soil formation. Interestingly, microorganisms alone or in conjunction with biocrust showed no discernible patterns compared to abiotic controls, potentially due to water-masking effects. Arid soils displayed reduced bacterial diversity and developed a new community structure dominated by Proteobacteria, Actinobacteriota, and Planctomycetota, while semiarid soils maintained a consistently dominant community of Acidobacteriota and Proteobacteria. This highlighted a sensitive and specialized bacterial community in arid soils, while semiarid soils exhibited a more complex and stable community. We conclude that microorganism-plant interaction has measurable impacts on initial soil formation in arid and semiarid regions on short time scales under climate change. Additionally, we propose that soil and climate legacies are decisive for the present soil microbial community structure and interactions, future soil development, and microbial responses.
KW - arid soil
KW - bacterial community
KW - climate change
KW - initial soil formation
KW - manipulation experiment
KW - semiarid soil
U2 - 10.3389/fmicb.2024.1319997
DO - 10.3389/fmicb.2024.1319997
M3 - Journal article
C2 - 38298893
AN - SCOPUS:85183646646
VL - 15
JO - Frontiers in Microbiology
JF - Frontiers in Microbiology
SN - 1664-302X
M1 - 1319997
ER -
ID: 382858843