Macrofaunal control of microbial community structure in continental margin sediments

Longhui Deng; Damian Bölsterli; Erik Kristensen; Christof Meile; Chih-Chieh Su; Stefano Michele Bernasconi; Marit-Solveig Seidenkrantz; Clemens Glombitza; Lorenzo Lagostina; Xingguo Han; Bo Barker Jørgensen; Hans Røy; Mark Alexander Lever

doi:10.1073/pnas.1917494117

Macrofaunal control of microbial community structure in continental margin sediments

Longhui Deng, Damian Bölsterli, Erik Kristensen, Christof Meile, Chih-Chieh Su, Stefano Michele Bernasconi, Marit-Solveig Seidenkrantz, Clemens Glombitza, Lorenzo Lagostina, Xingguo Han, Bo Barker Jørgensen, Hans Røy, Mark Alexander Lever

Department of Geoscience

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Abstract

Through a process called "bioturbation," burrowing macrofauna have altered the seafloor habitat and modified global carbon cycling since the Cambrian. However, the impact of macrofauna on the community structure of microorganisms is poorly understood. Here, we show that microbial communities across bioturbated, but geochemically and sedimentologically divergent, continental margin sites are highly similar but differ clearly from those in nonbioturbated surface and underlying subsurface sediments. Solid- and solute-phase geochemical analyses combined with modeled bioturbation activities reveal that dissolved O2 introduction by burrow ventilation is the major driver of archaeal community structure. By contrast, solid-phase reworking, which regulates the distribution of fresh, algal organic matter, is the main control of bacterial community structure. In nonbioturbated surface sediments and in subsurface sediments, bacterial and archaeal communities are more divergent between locations and appear mainly driven by site-specific differences in organic carbon sources.

Original language	English
Journal	Proceedings of the National Academy of Sciences (PNAS)
Volume	117
Issue	27
Pages (from-to)	15911-15922
Number of pages	12
ISSN	0027-8424
DOIs	https://doi.org/10.1073/pnas.1917494117
Publication status	Published - 7 Jul 2020

Keywords

Bioturbation
Burrow ventilation
Organic carbon sources
Particle reworking
Redox state

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Deng, L., Bölsterli, D., Kristensen, E., Meile, C., Su, C.-C., Bernasconi, S. M., Seidenkrantz, M.-S., Glombitza, C., Lagostina, L., Han, X., Jørgensen, B. B., Røy, H., & Lever, M. A. (2020). Macrofaunal control of microbial community structure in continental margin sediments. Proceedings of the National Academy of Sciences (PNAS), 117(27), 15911-15922. https://doi.org/10.1073/pnas.1917494117

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title = "Macrofaunal control of microbial community structure in continental margin sediments",

abstract = "Through a process called {"}bioturbation,{"} burrowing macrofauna have altered the seafloor habitat and modified global carbon cycling since the Cambrian. However, the impact of macrofauna on the community structure of microorganisms is poorly understood. Here, we show that microbial communities across bioturbated, but geochemically and sedimentologically divergent, continental margin sites are highly similar but differ clearly from those in nonbioturbated surface and underlying subsurface sediments. Solid- and solute-phase geochemical analyses combined with modeled bioturbation activities reveal that dissolved O2 introduction by burrow ventilation is the major driver of archaeal community structure. By contrast, solid-phase reworking, which regulates the distribution of fresh, algal organic matter, is the main control of bacterial community structure. In nonbioturbated surface sediments and in subsurface sediments, bacterial and archaeal communities are more divergent between locations and appear mainly driven by site-specific differences in organic carbon sources.",

keywords = "Bioturbation, Burrow ventilation, Organic carbon sources, Particle reworking, Redox state",

author = "Longhui Deng and Damian B{\"o}lsterli and Erik Kristensen and Christof Meile and Chih-Chieh Su and Bernasconi, {Stefano Michele} and Marit-Solveig Seidenkrantz and Clemens Glombitza and Lorenzo Lagostina and Xingguo Han and J{\o}rgensen, {Bo Barker} and Hans R{\o}y and Lever, {Mark Alexander}",

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doi = "10.1073/pnas.1917494117",

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Deng, L, Bölsterli, D, Kristensen, E, Meile, C, Su, C-C, Bernasconi, SM, Seidenkrantz, M-S, Glombitza, C, Lagostina, L, Han, X, Jørgensen, BB , Røy, H & Lever, MA 2020, 'Macrofaunal control of microbial community structure in continental margin sediments', Proceedings of the National Academy of Sciences (PNAS), vol. 117, no. 27, pp. 15911-15922. https://doi.org/10.1073/pnas.1917494117

Macrofaunal control of microbial community structure in continental margin sediments. / Deng, Longhui; Bölsterli, Damian; Kristensen, Erik et al.
In: Proceedings of the National Academy of Sciences (PNAS), Vol. 117, No. 27, 07.07.2020, p. 15911-15922.

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaper › Journal article › Research › peer-review

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T1 - Macrofaunal control of microbial community structure in continental margin sediments

AU - Deng, Longhui

AU - Bölsterli, Damian

AU - Kristensen, Erik

AU - Meile, Christof

AU - Su, Chih-Chieh

AU - Bernasconi, Stefano Michele

AU - Seidenkrantz, Marit-Solveig

AU - Glombitza, Clemens

AU - Lagostina, Lorenzo

AU - Han, Xingguo

AU - Jørgensen, Bo Barker

AU - Røy, Hans

AU - Lever, Mark Alexander

PY - 2020/7/7

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N2 - Through a process called "bioturbation," burrowing macrofauna have altered the seafloor habitat and modified global carbon cycling since the Cambrian. However, the impact of macrofauna on the community structure of microorganisms is poorly understood. Here, we show that microbial communities across bioturbated, but geochemically and sedimentologically divergent, continental margin sites are highly similar but differ clearly from those in nonbioturbated surface and underlying subsurface sediments. Solid- and solute-phase geochemical analyses combined with modeled bioturbation activities reveal that dissolved O2 introduction by burrow ventilation is the major driver of archaeal community structure. By contrast, solid-phase reworking, which regulates the distribution of fresh, algal organic matter, is the main control of bacterial community structure. In nonbioturbated surface sediments and in subsurface sediments, bacterial and archaeal communities are more divergent between locations and appear mainly driven by site-specific differences in organic carbon sources.

AB - Through a process called "bioturbation," burrowing macrofauna have altered the seafloor habitat and modified global carbon cycling since the Cambrian. However, the impact of macrofauna on the community structure of microorganisms is poorly understood. Here, we show that microbial communities across bioturbated, but geochemically and sedimentologically divergent, continental margin sites are highly similar but differ clearly from those in nonbioturbated surface and underlying subsurface sediments. Solid- and solute-phase geochemical analyses combined with modeled bioturbation activities reveal that dissolved O2 introduction by burrow ventilation is the major driver of archaeal community structure. By contrast, solid-phase reworking, which regulates the distribution of fresh, algal organic matter, is the main control of bacterial community structure. In nonbioturbated surface sediments and in subsurface sediments, bacterial and archaeal communities are more divergent between locations and appear mainly driven by site-specific differences in organic carbon sources.

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KW - Organic carbon sources

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KW - Redox state

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DO - 10.1073/pnas.1917494117

M3 - Journal article

C2 - 32576690

SN - 0027-8424

VL - 117

SP - 15911

EP - 15922

JO - Proceedings of the National Academy of Sciences (PNAS)

JF - Proceedings of the National Academy of Sciences (PNAS)

IS - 27

ER -

Macrofaunal control of microbial community structure in continental margin sediments

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